Biggest changeBacklog and gross margin: (In thousands) Backlog Gross Margin in Backlog Fourth quarter of 2022 $1,414,342 14.3% Third quarter of 2022 $1,411,271 14.0% Second quarter of 2022 $1,327,218 13.3% First quarter of 2022 $1,378,335 13.2% Fourth quarter of 2021 $1,327,900 12.6% 24 RESULTS OF OPERATIONS Consolidated Results Financial highlights for 2022 as compared to 2021 and 2020 are as follows: Years Ended December 31, (In thousands) 2022 2021 2020 Continuing Operations: Revenues $ 1,769,436 $ 1,414,374 $ 1,226,738 Gross profit 274,567 203,532 179,630 General and administrative expenses (86,480) (69,153) (64,308) Intangible asset amortization (14,100) (11,464) (11,436) Acquisition related costs (827) (3,877) (1,026) Other operating expense, net (13,290) (12,027) (10,245) Operating income 159,870 107,011 92,615 Interest, net (19,706) (19,266) (29,183) Gain (loss) on extinguishment of debt — 1,064 (301) Income before income taxes and noncontrolling interests 140,164 88,809 63,131 Income tax expense (41,707) (24,874) (19,410) Net income 98,457 63,935 43,721 Less: Net income attributable to noncontrolling interests (1,740) (2,478) (598) Net income attributable to Sterling common stockholders $ 96,717 $ 61,457 $ 43,123 Gross margin from Continuing Operations 15.5 % 14.4 % 14.6 % Discontinued Operations (Note 4): Revenues $ 196,134 $ 167,392 $ 200,674 Operating (loss) income $ (7,345) $ 276 $ 2,277 Pretax (loss) income $ (4,848) $ 1,214 $ 2,244 Pretax gain on disposition $ 16,687 $ — $ — 2022 compared to 2021 Revenues— Revenues were $1.77 billion for 2022, an increase of $355.1 million or 25.1% compared to the prior year.
Biggest changeDiscussions of year-over-year comparisons for 2022 and 2021 can be found in “Management's Discussion and Analysis of Financial Condition and Results of Operations” in Part II, Item 7 of our annual report on Form 10-K for the year ended December 31, 2022. 26 RESULTS OF OPERATIONS Consolidated Results The financial highlights for 2023 as compared to 2022 are as follows: Years Ended December 31, (In thousands) 2023 2022 Revenues $ 1,972,229 $ 1,769,436 Gross profit 337,638 274,567 General and administrative expenses (98,703) (86,480) Intangible asset amortization (15,226) (14,100) Acquisition related costs (873) (827) Other operating expense, net (17,041) (13,290) Operating income 205,795 159,870 Interest, net (15,180) (19,706) Income before income taxes and noncontrolling interests 190,615 140,164 Income tax expense (47,770) (41,707) Less: Net income attributable to noncontrolling interests (4,190) (1,740) Net income from Continuing Operations $ 138,655 $ 96,717 Gross margin 17.1 % 15.5 % Revenues— Revenues were $1.97 billion for 2023, an increase of $202.8 million, or 11.5%, compared to the prior year, with 9.1% generated from organic growth.
The cumulative impact of revisions in total cost estimates during the progress of work is reflected in the period in which these changes become known, including, to the extent required, the reversal of profit recognized in prior periods and the recognition of losses expected to be incurred on performance obligations in progress.
The cumulative impact of revisions in total cost estimates during the progress of work is reflected 31 in the period in which these changes become known, including, to the extent required, the reversal of profit recognized in prior periods and the recognition of losses expected to be incurred on performance obligations in progress.
Under the market-based method, 32 market information such as multiples of comparable publicly traded companies and/or completed sales transactions are used to develop or validate our fair value conclusions, when appropriate and available.
Under the market-based method, market information such as multiples of comparable publicly traded companies and/or completed sales transactions are used to develop or validate our fair value conclusions, when appropriate and available.
Borrowings —Based on our average borrowings for 2022 and our 2023 forecasted cash needs, we continue to believe that the Company has sufficient liquid financial resources to fund our requirements for the next year of operations. Furthermore, the Company is continually assessing ways to increase revenues and reduce costs to improve liquidity.
Borrowings —Based on our average borrowings for 2023 and our 2024 forecasted cash needs, we continue to believe that the Company has sufficient liquid financial resources to fund our requirements for the next year of operations. Furthermore, the Company is continually assessing ways to increase revenues and reduce costs to improve liquidity.
During the fourth quarter of 2022, 2021 and 2020, the Company performed a qualitative assessment of goodwill, and based on this assessment, no indicators of impairment were present. Factors considered include macroeconomic, industry and competitive conditions, financial performance and reporting unit specific events.
During the fourth quarter of 2023, 2022 and 2021, the Company performed a qualitative assessment of goodwill, and based on this assessment, no indicators of impairment were present. Factors considered include macroeconomic, industry and competitive conditions, financial performance and reporting unit specific events.
These are discussed in a number of places including Item 1A “Risk Factors.” Our annual assessments indicated there was no impairment of goodwill during the years ended December 31, 2022, 2021 and 2020.
These are discussed in a number of places including Item 1A “Risk Factors.” Our annual assessments indicated there was no impairment of goodwill during the years ended December 31, 2023, 2022 and 2021.
Other operating expense, net— Other operating expense, net, includes 50% of earnings and losses related to members’ interest of consolidated 50% owned subsidiary, earn-out expense and other miscellaneous operating income or expense. 26 Members’ interest earnings are treated as an expense and increase the liability account.
Other operating expense, net— Other operating expense, net, includes 50% of earnings and losses related to members’ interest of our consolidated 50% owned subsidiary, earn-out and other miscellaneous operating income or expense. Members’ interest earnings are treated as an expense and increase the liability account.
Purchase Price Allocations —The aggregate purchase price for the CCS, Petillo, and Kimes acquisitions were allocated to the major categories of assets and liabilities acquired based upon their estimated fair values as of the closing date, which were based, in part, upon internal and external valuations of certain assets, including specifically identified intangible assets and property and equipment.
Purchase Price Allocations —The aggregate purchase price for the PPG and CCS acquisitions were allocated to the major categories of assets and liabilities acquired based upon their estimated fair values as of the closing date, which were based, in part, upon internal and external valuations of certain assets, including specifically identified intangible assets and property and equipment.
Goodwill —Goodwill is not amortized to earnings, but instead is reviewed for impairment at least annually, absent any indicators of impairment or when other actions require an impairment assessment. The Company performs the annual impairment assessment during the fourth quarter of each year based on balances as of October 1.
Goodwill —Goodwill is not amortized to earnings, but instead is reviewed for impairment at least annually, absent any indicators of impairment or when other actions require an impairment assessment. The Company performs the annual impairment assessment for its reporting units during the fourth quarter of each year based on balances as of October 1.
For the years ended December 31, 2022, 2021 and 2020, there were no events or changes in circumstances that would indicate a material impairment of our long-lived assets.
For the years ended December 31, 2023, 2022 and 2021, there were no events or changes in circumstances that would indicate a material impairment of our long-lived assets. 32
Years Ended December 31, (In thousands) 2022 2021 2020 Net cash provided by (used in): Operating activities of Discontinued Operations $ (7,334) $ 11,384 $ 10,313 Investing activities of Discontinued Operations (723) (5,964) (1,908) Financing activities of Discontinued Operations (81) (1,908) 6,805 Net change in cash, cash equivalents, and restricted cash of Discontinued Operations $ (8,138) $ 3,512 $ 15,210 Credit Facilities, Debt and Other Capital General —In addition to our available cash, cash equivalents and cash provided by operations, from time to time we use borrowings to finance acquisitions, our capital expenditures and working capital needs.
Years Ended December 31, (In thousands) 2022 2021 Net cash provided by (used in): Operating activities of Discontinued Operations $ (7,334) $ 11,384 Investing activities of Discontinued Operations (723) (5,964) Financing activities of Discontinued Operations (81) (1,908) Net change in cash, cash equivalents, and restricted cash of Discontinued Operations $ (8,138) $ 3,512 Credit Facilities, Debt and Other Capital General —In addition to our available cash, cash equivalents and cash provided by operations, from time to time we use borrowings to finance acquisitions, our capital expenditures and working capital needs.
The Company expects to pursue strategic uses of its cash, such as, investing in projects or businesses that meet its gross margin targets and overall profitability and managing its debt balances.
The Company expects to pursue strategic uses of its cash, such as, investing in projects or businesses that meet its gross margin targets and overall profitability, managing its debt balances and repurchasing shares of its common stock.
Credit Facility —Our amended credit agreement (as amended, the “Credit Agreement”) provides the Company with senior secured debt financing in an initial principal amount of up to $615 million in the aggregate (collectively, the “Credit Facility”), consisting of (i) a senior secured first lien term loan facility (the “Term Loan Facility”) in the aggregate principal amount of $540 million and (ii) a senior secured first lien revolving credit facility (the “Revolving Credit Facility”) in an aggregate principal amount of $75 million (with a $75 million limit for the issuance of letters of credit and a $15 million sublimit for swing line loans).
Credit Facility —Our amended Credit Agreement provides the Company with senior secured debt financing consisting of the following (collectively, the “Credit Facility”): (i) a senior secured first lien term loan facility (the “Term Loan Facility”) in the aggregate principal amount of $350 million and (ii) a senior secured first lien revolving credit facility (the “Revolving Credit Facility”) in an aggregate principal amount of up to $75 million (with a $75 million limit for the issuance of letters of credit and a $15 million sublimit for swing line loans).
Backlog includes $18.5 million and $71.5 million attributable to our share of estimated revenues related to joint ventures where we are a noncontrolling joint venture partner at December 31, 2022 and 2021, respectively. We anticipate that approximately 75% of our Backlog will be recognized as revenues during 2023, with substantially all remaining recognized in the twelve months following.
Backlog includes $112.4 million and $18.5 million attributable to our share of estimated revenues related to joint ventures where we are a noncontrolling joint venture partner at December 31, 2023 and 2022, respectively. We anticipate that approximately 65% of our Backlog will be recognized as revenues during 2024, with substantially all remaining recognized in the twelve months following.
Our unsigned low-bid awards (“Unsigned Low-bid Awards”) are excluded from Backlog until the contract is executed by our customer. We refer to the combination of our Backlog and Unsigned Low-bid Awards as “Combined Backlog.” Our book-to-burn ratio, a non-GAAP measure, is determined by taking our additions to Backlog and dividing it by revenue for the applicable period.
Our unsigned awards (“Unsigned Awards”) are excluded from Backlog until the contract is executed by our customer. We refer to the combination of our Backlog and Unsigned Awards as “Combined Backlog.” Our book-to-burn ratio is determined by taking our additions to Backlog and dividing it by revenue for the applicable period.
Capital Expenditures — Capital equipment is acquired as needed by increased levels of production and to replace retiring equipment. Capital expenditures, net of disposals, incurred in 2022 were $56 million.
Capital Expenditures — Capital equipment is acquired as needed by increased levels of production and to replace retiring equipment. Capital expenditures, net of disposals, incurred in 2023 were $51 million.
Thus, gross profit as a percent of revenues can increase or decrease from comparable and subsequent quarters due to variations among contracts and depending upon the stage of completion of contracts. 25 General and administrative expenses— General and administrative expenses were $86.5 million, or 4.9% of revenue, for 2022, compared to $69.2 million, or 4.9% of revenue, in the prior year.
Thus, gross profit as a percent of revenues can increase or decrease from comparable and subsequent quarters due to variations among contracts and depending upon the stage of completion of contracts. General and administrative expenses— General and administrative expenses were $98.7 million, or 5.0% of revenue, for 2023, compared to $86.5 million, or 4.9% of revenue, in the prior year.
The Company’s margin in Backlog has increased from 12.6% at December 31, 2021 to 14.3% at December 31, 2022 and the Combined Backlog margin increased from 12.6% at December 31, 2021 to 14.2% at December 31, 2022, driven by a greater mix of E-Infrastructure Solutions backlog and an improved backlog margin mix within Transportation Solutions.
The Company’s margin in Backlog has increased to 15.2% at December 31, 2023 from 14.3% at December 31, 2022 and the Combined Backlog margin increased to 15.4% at December 31, 2023 from 14.2% at December 31, 2022, driven by a greater mix of E-Infrastructure Solutions backlog and an improved backlog margin mix within Transportation Solutions.
At December 31, 2022, we had $423.7 million of outstanding borrowings under the Term Loan Facility and 30 no outstanding borrowings under the Revolving Credit Facility. The obligations under the Credit Facility are secured by substantially all assets of the Company and the subsidiary guarantors, subject to certain permitted liens and interests of other parties.
At December 31, 2023, we had $343.4 million of outstanding borrowings under the Term Loan Facility and no outstanding borrowings under the Revolving Credit Facility. The obligations under the Credit Facility are secured by substantially all assets of the Company and the subsidiary guarantors, subject to certain permitted liens and interests of other parties.
The disposition is consistent with the Company’s strategic shift to reduce its portfolio of low-bid heavy highway and water containment & treatment projects in order to reduce risk and improve the Company’s margins and to focus on its strategic geographies outside of California. See Note 4 - Dispositions for further discussion.
The disposition is consistent with the Company’s strategic shift to reduce its portfolio of low-bid heavy highway and water containment & treatment projects in order to reduce risk and improve the Company’s margins and to focus on its strategic geographies outside of California.
E-Infrastructure Solutions projects include advanced, large-scale site development systems and services for data centers, e-commerce distribution centers, warehousing, transportation, energy and more. Transportation Solutions includes infrastructure and rehabilitation projects for highways, roads, bridges, airports, ports, light rail and storm drainage systems.
E-Infrastructure Solutions provides advanced, large-scale site development services for manufacturing, data centers, e-commerce distribution centers, warehousing, power generation and more. Transportation Solutions includes infrastructure and rehabilitation projects for highways, roads, bridges, airports, ports, rail and storm drainage systems.
At December 31, 2022, our Backlog was $1.41 billion, as compared to $1.33 billion at December 31, 2021, with a book-to-burn ratio of 1.06 for the year ended December 31, 2022.
At December 31, 2023, our Backlog was $2.07 billion, as compared to $1.41 billion at December 31, 2022, with a book-to-burn ratio of 1.38 for the year ended December 31, 2023.
The change in other operating expense, net, was an increase of $1.8 million during 2021 compared to the prior year. Members’ interest earnings increased by $2.8 million during 2021 to $11.5 million from $8.7 million in the prior year, as a result of improved margin mix from our 50% owned subsidiary.
The change in other operating expense, net, was an increase of $3.8 million during 2023 compared to the prior year. Members’ interest earnings increased by $4.4 million during 2023 to $17.7 million from $13.3 million in the prior year, as a result of higher revenue and improved margin mix from our 50% owned subsidiary.
Unsigned Low-bid Awards were $275.0 million at December 31, 2022 and $22.5 million at December 31, 2021. Combined Backlog totaled $1.69 billion at December 31, 2022 and $1.35 billion at December 31, 2021, with a book-to-burn ratio of 1.22 for the year ended December 31, 2022.
Unsigned Awards were $303.2 million at December 31, 2023 and $275.0 million at December 31, 2022. Combined Backlog totaled $2.37 billion at December 31, 2023 and $1.69 billion at December 31, 2022, with a book-to-burn ratio of 1.40 for the year ended December 31, 2023.
The segment information for the prior periods has been recast to conform to the current presentation of continuing operations.
The segment information for the prior period has been recast to conform to the current presentation.
Cash flows provided by operating activities were driven by higher net income, adjusted for various non-cash items and changes in accounts receivable, net contracts in progress and accounts payable balances (collectively, “Contract Capital”), as discussed below, and other assets and accrued liabilities. 29 Changes in Contract Capital— The change in operating assets and liabilities varies due to fluctuations in operating activities and investments in Contract Capital.
The significant improvement in cash flows provided by operating activities was primarily driven by higher net income and improvements in our accounts receivable, net contracts in progress and accounts payable balances (collectively, “Contract Capital”), as discussed below. Changes in Contract Capital— The change in operating assets and liabilities varies due to fluctuations in operating activities and investments in Contract Capital.
In addition, the Company is required to maintain certain financial covenants. As of December 31, 2022, we were in compliance with all of our restrictive and financial covenants. The Company’s debt is recorded at its carrying amount in the Consolidated Balance Sheets. As of December 31, 2022 and 2021, the carrying values of our debt outstanding approximated the fair values.
In addition, the Company is required to maintain certain financial covenants. See Note 10 - Debt for further discussion of these financial covenants. As of December 31, 2023, we were in compliance with all of our restrictive and financial covenants. The Company’s debt is recorded at its carrying amount in the Consolidated Balance Sheets.
The changes in components of Contract Capital during the years ended December 31, 2022 and 2021 were as follows: Years Ended December 31, (In thousands) 2022 2021 Contracts in progress, net $ 77,692 $ 12,906 Accounts receivable (63,285) (8,300) Receivables from and equity in construction joint ventures (5,034) (243) Accounts payable 11,888 26,605 Change in Contract Capital, net $ 21,261 $ 30,968 During 2022, the change in Contract Capital increased liquidity by $21.3 million.
The changes in components of Contract Capital during the years ended December 31, 2023 and 2022 were as follows: Years Ended December 31, (In thousands) 2023 2022 Contracts in progress, net $ 226,066 $ 77,692 Accounts receivable 12,805 (63,285) Receivables from and equity in construction joint ventures (3,384) (5,034) Accounts payable 10,307 11,888 Change in Contract Capital, net $ 245,794 $ 21,261 During 2023, the change in Contract Capital was $245.8 million.
To date, we have not encountered difficulties or material cost increases in obtaining new surety bonds. Capital Strategy — The Company will continue to explore additional revenue growth and capital alternatives to improve leverage and strengthen its financial position in order to take advantage of trends in the civil infrastructure and E-infrastructure markets.
Capital Strategy — The Company will continue to explore additional revenue growth and capital alternatives to improve leverage and strengthen its financial position in order to take advantage of trends in the civil infrastructure and E-infrastructure markets.
The Company’s Contract Capital fluctuations are impacted by the mix of projects in Backlog, seasonality (particularly with the acquired Petillo operations), the timing of new awards and related payments for work performed and the contract billings to the customer as projects are completed.
The Company’s Contract Capital fluctuations are impacted by the mix of projects in Backlog, seasonality, the timing of new awards and related payments for work performed and the contract billings to the customer as projects are completed. Contract Capital is also impacted at period-end by the timing of accounts receivable collections and accounts payable payments for projects.
Building Solutions projects include residential and commercial concrete foundations for single-family and multi-family homes, parking structures, elevated slabs and other concrete work. From strategy to operations, we are committed to sustainability by operating responsibly to safeguard and improve society’s quality of life. Caring for our people and our communities, our customers and our investors – that is The Sterling Way.
Building Solutions includes residential and commercial concrete foundations for single-family and multi-family homes, parking structures, elevated slabs, other concrete work, and plumbing services for new single-family residential builds. From strategy to operations, we are committed to sustainability by operating responsibly to safeguard and improve society’s quality of life.
Corporate Operating expense— Corporate overhead is primarily comprised of corporate headquarters facility expense, the cost of the executive management team, and expenses pertaining to certain centralized functions that benefit the entire Company but are not directly attributable to the businesses, such as corporate human resources, legal, governance and finance functions.
The unallocated remainder is reported in the “Corporate G&A Expense” line, which is primarily comprised of corporate headquarters facility expense, the cost of the executive management team, and other expenses pertaining to certain centralized functions that benefit the entire Company but are not directly attributable to any specific business segment, such as corporate human resources, legal, governance, compliance and finance functions.
Management expects net capital expenditures in 2023 to be in the range of $55 to $60 million; however, the award of a project requiring significant purchases of equipment or other factors could result in increased expenditures. NEW ACCOUNTING STANDARDS There were no new accounting standards adopted during the year ended December 31, 2022.
Management expects net capital expenditures in 2024 to be in the range of $55 to $60 million; however, the award of a project requiring significant purchases of equipment or other factors could result in increased expenditures.
In 2022, the residential market experienced significant price volatility and availability for key materials including concrete, steel and lumber, as well as increases in subcontractor labor cost and decreases in labor availability.
In 2022, the residential market experienced significant price volatility and availability for key materials, including concrete, steel and lumber, as well as increases in subcontractor labor costs and decreased labor availability. The Company negotiated with customers to successfully recoup the increases in material and labor costs through price increases.
The increase was driven by a $75.0 million increase in Transportation Solutions, a $71.5 million increase in E-Infrastructure Solutions and a $41.1 million increase in Building Solutions. Gross profit— Gross profit was $203.5 million for 2021, an increase of $23.9 million or 13.3% compared to the prior year.
The increase was driven by an $88.4 million increase in Transportation Solutions, an $82.3 million increase in Building Solutions and a $32.1 million increase in E-Infrastructure Solutions. Gross profit— Gross profit was $337.6 million for 2023, an increase of $63.1 million, or 23.0%, compared to the prior year.
The following table presents the cash flows from discontinued operations. The year ended December 31, 2022 represents the period ending November 30, 2022, the date of disposition.
The year ended December 31, 2022 represents the period ending November 30, 2022, the date of disposition.
Accordingly, the historical results of Myers have been presented as discontinued operations in our Consolidated Statements of Operations and Consolidated Balance Sheets. Prior to being disclosed as a discontinued operation, the results of Myers were included within our Transportation Solutions segment. The following discussion reflects continuing operations only, unless otherwise indicated.
The disposition represented a strategic shift that had a major effect on our operations and consolidated financial results, and accordingly, the historical results of Myers have been presented as discontinued operations in our Consolidated Statements of Operations. Prior to being disclosed as a discontinued operation, the results of Myers were included within our Transportation Solutions segment.
We have pledged all proceeds and other rights under our construction contracts to our bond surety company. Events that affect the insurance and bonding markets may result in bonding becoming more difficult to obtain in the future, or being available only at a significantly greater cost.
Events that affect the insurance and bonding markets may result in bonding becoming more difficult to obtain in the future, or being available only at a significantly greater cost. To date, we have not encountered difficulties or material cost increases in obtaining new surety bonds.
LIQUIDITY AND SOURCES OF CAPITAL Cash and Cash Equivalents— Total cash and cash equivalents at December 31, 2022 and 2021 were $181.5 million and $81.8 million, respectively, and included the following components: As of December 31, (In thousands) 2022 2021 Generally available $ 100,825 $ 29,812 Consolidated 50% owned subsidiary - Continuing Operations 55,700 16,630 Construction joint ventures 25,019 14,503 Cash and cash equivalents from Continuing Operations 181,544 60,945 Consolidated 50% owned subsidiary - Discontinued Operations — 20,895 Total cash and cash equivalents $ 181,544 $ 81,840 The following table presents consolidated information about our cash flows: Years Ended December 31, (In thousands) 2022 2021 Net cash provided by (used in): Operating activities $ 219,116 $ 158,932 Investing activities (89,755) (223,449) Financing activities (32,789) 80,568 Net change in cash and cash equivalents $ 96,572 $ 16,051 Operating Activities— During 2022, net cash provided by operating activities was $219.1 million compared to net cash provided by operating activities of $158.9 million in the prior year.
The increase in operating income was driven by the aforementioned higher volume. 28 LIQUIDITY AND SOURCES OF CAPITAL Cash and Cash Equivalents— Total cash and cash equivalents at December 31, 2023 and 2022 were $471.6 million and $181.5 million, respectively, and included the following components: As of December 31, (In thousands) 2023 2022 Generally available $ 362,884 $ 100,825 Consolidated 50% owned subsidiary 72,007 55,700 Construction joint ventures 36,672 25,019 Cash and cash equivalents $ 471,563 $ 181,544 The following table presents consolidated information about our cash flows: Years Ended December 31, (In thousands) 2023 2022 Net cash provided by (used in): Operating activities $ 478,584 $ 219,116 Investing activities (87,752) (89,755) Financing activities (104,534) (32,789) Net change in cash and cash equivalents $ 286,298 $ 96,572 Operating Activities— During 2023, net cash provided by operating activities was $478.6 million compared to net cash provided by operating activities of $219.1 million in the prior year.
SIGNIFICANT TRANSACTIONS Myers Disposition— On November 30, 2022, we entered into an agreement (the “Agreement”) and sold the Company’s 50% ownership interest in its partnership with Myers & Sons Construction L.P. for $18 million in cash.
Caring for our people and our communities, our customers and our investors – that is The Sterling Way. SIGNIFICANT TRANSACTIONS Myers Disposition— On November 30, 2022, we sold the Company’s 50% ownership interest in its partnership with Myers for $18 million in cash.
Gross margin— The Company’s gross margin as a percent of revenue increased to 15.5% in 2022, as compared to 14.4% in the prior year, driven by an increased proportion of revenue from the higher margin E-Infrastructure Solutions segment, improved margin mix from Transportation Solutions, and the recovery of increased costs from Building Solutions.
The increase was driven by higher volume, an improved project margin mix in Transportation Solutions and an improving supply chain. Gross margin— The Company’s gross margin as a percent of revenue increased to 17.1% in 2023, as compared to 15.5% in the prior year.
The increase is due to additional borrowings related to the Petillo Acquisition and increasing interest rates in 2022. Income taxes— The effective income tax rate was 29.8% in 2022 and 28.0% in the prior year. The rates varied from the statutory rate primarily as a result of state income taxes, non-taxed PPP loan forgiveness, non-deductible compensation and other permanent differences.
Income taxes— The effective income tax rate was 25.1% in 2023 and 29.8% in the prior year. The rate varied from the statutory rate primarily as a result of state income taxes, non-deductible compensation and other permanent differences. In 2023, the Company’s non-deductible compensation was offset by increased tax deductions related to stock compensation.
Contracts in progress that were not substantially complete totaled approximately 230 and 150 at December 31, 2022 and 2021, respectively. These contracts are of various sizes, of different expected profitability and in various stages of completion.
The increase in gross margin as a percent of revenue was due to an easing of supply chain challenges starting in the second quarter of 2023. Contracts in progress that were not substantially complete totaled approximately 230 at both December 31, 2023 and 2022. These contracts are of various sizes, of different expected profitability and in various stages of completion.
Material Cash Requirements The following table sets forth our material cash requirements from contractual obligations at December 31, 2022: Payments due by period (In thousands) Total 1 - 3 Years 4 – 5 Years >5 Years Credit Facility $ 423,663 $ 31,935 $ 391,728 $ — $ — Credit Facility interest 22,668 13,862 8,806 — — Other notes payable (inclusive of outstanding interest) 12,901 1,484 11,417 — — Members’ interest subject to mandatory redemption and undistributed earnings (1) 21,597 21,597 — — — Total $ 480,829 $ 68,878 $ 411,951 $ — $ — 31 (1) Mandatory redemption is based on the death or disability of the interest holder.
Material Cash Requirements The following table sets forth our material cash requirements from contractual obligations at December 31, 2023: Payments due by period (In thousands) Total 1 - 3 Years 4 – 5 Years >5 Years Credit Facility $ 343,438 $ 26,250 $ 317,188 $ — $ — Credit Facility interest 57,923 26,089 31,834 — — Other notes payable (inclusive of outstanding interest) 843 275 333 235 — Members’ interest subject to mandatory redemption and undistributed earnings (1) 29,108 29,108 — — — Total $ 431,312 $ 81,722 $ 349,355 $ 235 $ — (1) Mandatory redemption is based on the death or disability of the interest holder.
Our ability to obtain surety bonds primarily depends upon our capitalization, working capital, past performance, management expertise and reputation and certain external factors, including the overall capacity of the surety market. Surety companies consider such factors in relationship to the amount of our backlog and their underwriting standards, which may change from time to time.
Bonding — As is customary in the construction business, we are required to provide surety bonds to secure our performance under construction contracts. Our ability to obtain surety bonds primarily depends upon our capitalization, working capital, past performance, management expertise and reputation and certain external factors, including the overall capacity of the surety market.
Sterling operates through a variety of subsidiaries within three segments specializing in E-Infrastructure, Transportation and Building Solutions in the United States (the “U.S.”), primarily across the Southern, Northeastern and Mid-Atlantic U.S., the Rocky Mountain States, and Hawaii, as well as other areas with strategic construction opportunities.
This discussion should be read in conjunction with our Consolidated Financial Statements and the related notes thereto. OVERVIEW General —Sterling operates through a variety of subsidiaries within three segments specializing in E-Infrastructure, Transportation and Building Solutions in the United States, primarily across the Southern, Northeastern, Mid-Atlantic and Rocky Mountain regions and the Pacific Islands.
As a result of this bill, Sterling had an increase in bid activity and project awards starting in the third quarter of 2022, and we expect this trend to continue for the foreseeable future. Building Solutions —Our Building Solutions segment is comprised of our residential and commercial businesses.
The IIJA also includes $25 billion of funding for airport modernization. As a result of the IIJA, we had an increase in bid activity and project awards which started in the third quarter of 2022 and continued through 2023. We expect this positive trend to continue for the foreseeable future.
Operating income— Operating income was $26.6 million for 2022, an increase of $6.7 million compared to the prior year.
Operating income— Operating income was $46.2 million, or 11.4% of revenue, for 2023, an increase of $9.5 million compared to $36.7 million, or 11.4% of revenue, in the prior year.
However, in the event of a substantial cash constraint and if we were unable to secure adequate debt financing, our liquidity could be materially and adversely affected. Issuance Common Stock —On December 20, 2022, in connection with the acquisition of the business of CCS, the Company issued 157 thousand shares of the Company’s stock as consideration paid to the sellers.
However, in the event of a substantial cash constraint, and if we were unable to secure adequate debt financing, our liquidity could be materially and adversely affected. Issuance of Common Stock —In addition to our available cash, cash equivalents and cash provided by operations and borrowings, from time to time we issue common stock to finance acquisitions.
The revenue growth of our residential business is directly related to the growth of new home starts in its key market of Dallas-Fort Worth and the continued expansion in the Houston and Phoenix markets. The core customer base of our residential business is primarily made up of leading national home builders as well as regional and custom home builders.
Building Solutions —Our Building Solutions segment is comprised of our residential and commercial businesses. The segment is driven by new home starts in Dallas-Fort Worth, the segments largest market, and continued expansion in the Houston and Phoenix markets. Building Solutions' core customer base includes top national, regional and custom home builders in our areas.
Years Ended December 31, (In thousands) 2022 % of Revenues 2021 % of Revenues 2020 % of Revenues Revenues E-Infrastructure Solutions $ 905,277 51% $ 468,784 33% $ 397,253 32% Transportation Solutions 542,550 31% 628,190 45% 553,150 45% Building Solutions 321,609 18% 317,400 22% 276,335 23% Total Revenues $ 1,769,436 $ 1,414,374 $ 1,226,738 Operating Income (Loss) E-Infrastructure Solutions $ 121,453 13.4% $ 80,478 17.2% $ 76,522 19.3% Transportation Solutions 26,623 4.9% 19,888 3.2% 11,998 2.2% Building Solutions 36,693 11.4% 32,564 10.3% 30,441 11.0% Segment Operating Income 184,769 10.4% 132,930 9.4% 118,961 9.7% Corporate (24,072) (22,042) (25,320) Acquisition related costs (827) (3,877) (1,026) Total Operating Income $ 159,870 9.0% $ 107,011 7.6% $ 92,615 7.5% 2022 compared to 2021 E-Infrastructure Solutions Revenues— Revenues were $905.3 million for 2022, an increase of $436.5 million or 93.1% compared to the prior year.
Years Ended December 31, (In thousands) 2023 % of Revenues 2022 % of Revenues Revenues E-Infrastructure Solutions $ 937,408 48% $ 905,277 51% Transportation Solutions 630,908 32% 542,550 31% Building Solutions 403,913 20% 321,609 18% Total Revenues $ 1,972,229 $ 1,769,436 Operating Income E-Infrastructure Solutions $ 140,997 15.0% $ 121,453 13.4% Transportation Solutions 41,911 6.6% 26,623 4.9% Building Solutions 46,193 11.4% 36,693 11.4% Segment Operating Income 229,101 11.6% 184,769 10.4% Corporate G&A Expense (22,433) (24,072) Acquisition Related Costs (873) (827) Total Operating Income $ 205,795 10.4% $ 159,870 9.0% E-Infrastructure Solutions Revenues— Revenues were $937.4 million for 2023, an increase of $32.1 million, or 3.5%, compared to the prior year.
Discontinued Operations— Revenues were $196.1 million for 2022, an increase of $28.7 million or 17.2% compared to the prior year. The increase was driven by higher heavy highway and water containment and treatment revenue, partly offset by lower aviation revenue. Operating loss was $7.3 million for 2022, a decrease of $7.6 million, compared to the prior year.
The increase was driven by higher heavy highway and other non-highway services revenue, partly offset by lower aviation revenues due to the timing of new awards. Operating income— Operating income was $41.9 million, or 6.6% of revenue, for 2023, an increase of $15.3 million compared to $26.6 million, or 4.9% of revenue, in the prior year.
In accordance with the Agreement’s payment terms, the Company is to receive $12 million in January of 2023 and a series of three $2 million payments due by various dates in 2023, 2025 and 2027.
In accordance with the Agreement’s payment terms, the Company received two payments totaling $14 million in the first quarter of 2023, and two additional payments of $2 million each are due by the end of 2025 and 2027, respectively.
Capital equipment is acquired as needed to support changing levels of production activities and to replace retiring equipment. Financing Activities— During 2022, net cash used in financing activities was $32.8 million compared to net cash provided of $80.6 million in the prior year.
In 2023, the cash used in investing activities was driven by $51.2 million for the acquisition of the PPG business and $50.6 million for the net purchases of capital equipment, partly offset by the $14 million received for the disposition of Myers. Capital equipment is acquired as needed to support changing levels of production activities and to replace retiring equipment.
E-Infrastructure Solutions —Sterling’s E-Infrastructure Solutions business is primarily driven by investments in the development of data centers, e-commerce distribution centers, advanced manufacturing centers and warehouses.
E-Infrastructure Solutions —Our E-Infrastructure Solutions business is driven by our customers’ investments in the development of advanced manufacturing centers, data centers, e-commerce distribution centers and warehouses. We foresee significant growth opportunities tied to the implementation of multi-year capital deployment plans by customers in the electric vehicle (EV), battery, solar, food, and semiconductor manufacturing markets.
Operating income— Operating income was $80.5 million for 2021, an increase of $4.0 million compared to the prior year. The increase was primarily driven by higher volume; however, it was partly offset by headwinds from supply chain issues and the related impact on productivity and efficiency.
The increase was primarily driven by higher volume from advanced manufacturing and data centers, partly offset by lower volume from large e-commerce distribution centers and small warehouses. Operating income— Operating income was $141.0 million, or 15.0% of revenue, for 2023, an increase of $19.5 million compared to $121.5 million, or 13.4% of revenue, in the prior year.
Contract Capital is also impacted at period-end by the timing of accounts receivable collections and accounts payable payments for projects. Investing Activities— During 2022, net cash used in investing activities was $89.8 million, compared to net cash used of $223.4 million in the prior year.
Investing Activities— During 2023, net cash used in investing activities was $87.8 million, compared to net cash used of $89.8 million in the prior year.
Discontinued Operations— Cash flows from discontinued operations are disclosed below and in Note 4 - Dispositions , rather than separately presented in the statement of cash flows. The Company does not expect the absence of the cash flows from discontinued operations to have a significant impact on future liquidity and capital resources.
(“Plateau”) seller note, and $9.6 million for withholding taxes paid on the net share settlement of vested equity awards. 29 Discontinued Operations— Cash flows from discontinued operations are disclosed below and in Note 4 - Dispositions , rather than separately presented in the statement of cash flows.
In 2022, the cash used in financing activities was driven by $23.4 million in repayments on the Term Loan Facility (as defined below) and $9.4 million for withholding taxes paid on the net share settlement of vested equity awards.
In 2023, the cash used in financing activities was primarily driven by $93.5 million in repayments of debt, including scheduled payments of $29.8 million and voluntary early payments of $53 million on the Term Loan Facility (as defined below) and $10 million for the repayment of the Plateau Excavation, Inc.
The increase in revenue was primarily the result of a $44.5 million increase in residential revenues, partly offset by a $3.4 million decrease in commercial revenues. Despite inclement weather in Texas in the first half of 2021, the Company’s revenue increased due to a record number of concrete slabs poured in 2021.
The increase was primarily driven by a $66.0 million increase in residential revenues due to a record number of slabs poured in 2023, and an increase in commercial volume compared to 2022. The increase in residential revenues includes $34.4 million from the Arizona concrete foundation business acquired in late 2022.
Transportation Solutions —Sterling’s Transportation Solutions business is primarily driven by federal, state and municipal funding. Federal funds, on average, provide 50% of annual State Department of Transportation capital outlays for highway and bridge projects. In October 2018, the Federal Aviation Administration reauthorized $3.35 billion annually through 2023.
Federal funds, on average, provide 50% of annual State Department of Transportation capital outlays for highway and bridge projects. We benefit from a number of federal, state and local infrastructure investment programs.
The increase was primarily driven by the inclusion of $288.8 million of revenue generated from Petillo operations, as well as higher volume from organic growth. 27 Operating income— Operating income was $121.5 million for 2022, an increase of $41.0 million compared to the prior year.
The increases in operating income and margin were driven by an improved project margin mix and the aforementioned higher revenue. Building Solutions Revenues— Revenues were $403.9 million for 2023, an increase of $82.3 million, or 25.6%, compared to the prior year, with 12.8% generated from organic growth.
We incur expenses at the corporate level that relate to our business as a whole. Certain of these amounts have been charged to our business segments by various methods, largely on the basis of usage, with the unallocated remainder reported in the “Corporate” line.
A portion of these expenses are allocated to our business segments by various methods, but primarily on the basis of usage.