United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SECURITIES EXCHANGE ACT OF 1934 (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-37966 SEACOR Marine Holdings Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 47-2564547 (Sta ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-37966 SEACOR Marine Holdings Inc. (Exact Name of Registrant as Specified in Its Charter) Delaware 47-2564547 (State or Other Jur ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-37966 Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-37966 SEACOR Marine Holdings Inc. (Exact Name of Registrant as Specified in Its Charter) Delaware 47-2564547 (State or Other Jurisdi ...

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ANNUAL REPORT PURSUANT TO SECTIONS 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-37966 SEACOR Marine Holdings Inc. (Exact name of ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-37966 SEACOR Marine Holdings Inc. (Exact Name of Registrant as Specified in Its Charter) Delaware 47-2564547 (State or Other Jurisdiction of Incorporation or Organization) WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the q ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-37966 SEACOR Marine Holdings Inc. (Exact Name of Registrant as Specified in Its Charter) Delaware 47-2564547 (State or Other Jurisdic ...

Part I. [Financial Information](index=3&type=section&id=Part%20I.%20Financial%20Information) [Financial Statements (Unaudited)](index=3&type=section&id=Item%201.%20Financial%20Statements%20%28Unaudited%29) Q1 2021 net income of **$6.0 million** from a **$20.0 million** loss in Q1 2020, driven by asset sale gain and increased cash Condensed Consolidated Balance Sheet Summary (in thousands) | Account | March 31, 2021 | December 31, 2020 | | :--- | :--- | :--- | | **Total Current Assets** | $149,857 | $178,696 | | **Net Property and Equipment** | $735,168 | $753,662 | | **Total Assets** | **$973,816** | **$1,017,663** | | **Total Current Liabilities** | $91,220 | $131,804 | | **Total Liabilities** | $564,657 | $615,827 | | **Total Equity** | **$409,159** | **$401,836** | | **Total Liabilities and Equity** | **$973,816** | **$1,017,663** | Condensed Consolidated Statements of Income (Loss) Summary (in thousands) | Account | Three Months Ended March 31, 2021 | Three Months Ended March 31, 2020 | | :--- | :--- | :--- | | **Operating Revenues** | $36,512 | $35,667 | | **Operating Loss** | $(16,555) | $(23,721) | | **Loss from Continuing Operations** | $(16,914) | $(17,938) | | **Income (Loss) on Discontinued Operations** | $22,925 | $(2,054) | | **Net Income (Loss)** | **$6,011** | **$(19,992)** | | **Net Income (Loss) attributable to SEACOR Marine** | **$6,011** | **$(15,945)** | | **EPS (Basic and Diluted)** | **$0.24** | **$(0.66)** | Condensed Consolidated Statements of Cash Flows Summary (in thousands) | Cash Flow Activity | Three Months Ended March 31, 2021 | Three Months Ended March 31, 2020 | | :--- | :--- | :--- | | **Net cash used in operating activities** | $(3,375) | $(11,138) | | **Net cash provided by investing activities** | $39,440 | $3,552 | | **Net cash used in financing activities** | $(8,292) | $(5,069) | | **Net Increase (Decrease) in Cash** | **$32,223** | **$(14,474)** | - On January 12, 2021, the company completed the sale of Windcat Workboats Holdings Ltd., recognizing a gain of approximately **$22.8 million**. Net proceeds from the sale were **$38.7 million**[47](index=47&type=chunk) [Management's Discussion and Analysis of Financial Condition and Results of Operations](index=25&type=section&id=Item%202.%20Management%27s%20Discussion%20and%20Analysis%20of%20Financial%20Condition%20and%20Results%20of%20Operations) Market challenges persist, but liquidity is strong; the SEACOR Power capsizing incident poses significant risks - On April 13, 2021, the liftboat SEACOR Power capsized off the coast of Louisiana, resulting in multiple fatalities, the **constructive total loss** of the vessel, and **significant ongoing investigations** by the NTSB and U.S. Coast Guard. The company anticipates **substantial costs, potential liabilities, and reputational impact** from this incident[95](index=95&type=chunk)[96](index=96&type=chunk) - The company completed the sale of its Windcat Workboats crew transfer vessel (CTV) business on January 12, 2021, for a purchase price of **£32.8 million**, receiving net cash proceeds of approximately **US$42.6 million**[97](index=97&type=chunk) - The company received an aggregate of **$32.3 million** in cash tax refunds under the CARES Act, with **$12.5 million** received before March 31, 2021, and the remaining **$19.8 million** received in April 2021[99](index=99&type=chunk) Consolidated Results of Operations Summary (in thousands) | Metric | Q1 2021 | Q1 2020 | | :--- | :--- | :--- | | **Operating Revenues** | $36,512 | $35,667 | | **Operating Loss** | $(16,555) | $(23,721) | | **Net Income (Loss) attributable to SEACOR Marine** | $6,011 | $(15,945) | | **Direct Vessel Profit (DVP)** | $10,205 | $14,932 | [Operating Income (Loss) by Segment](index=34&type=section&id=Operating%20Income%20%28Loss%29%20by%20Segment) Segment DVP varied: U.S. Gulf of Mexico and Africa/Europe declined, Middle East/Asia fell, Latin America improved Direct Vessel Profit (DVP) by Geographic Segment (in thousands) | Region | Q1 2021 DVP | Q1 2020 DVP | Change | | :--- | :--- | :--- | :--- | | **United States (Gulf of Mexico)** | $(1,312) | $401 | $(1,713) | | **Africa and Europe** | $3,934 | $7,959 | $(4,025) | | **Middle East and Asia** | $3,353 | $5,029 | $(1,676) | | **Latin America** | $4,230 | $1,543 | $2,687 | - In the U.S. Gulf of Mexico, charter revenues fell by **$2.9 million** due to vessel repositioning and changes in fleet mix, leading to a DVP loss of **$1.3 million**[108](index=108&type=chunk)[109](index=109&type=chunk) - In Latin America, charter revenues increased by **$6.3 million**, primarily due to net fleet additions, which drove a DVP increase of **$2.7 million**[117](index=117&type=chunk)[118](index=118&type=chunk) [Liquidity and Capital Resources](index=39&type=section&id=Liquidity%20and%20Capital%20Resources) Strong liquidity with **$71.8 million** cash, bolstered by asset sale and tax refund, sufficient to meet obligations - As of March 31, 2021, the company held **$71.8 million** in cash, cash equivalents, restricted cash, and construction reserve funds. An additional **$19.8 million** in tax refunds was received in April 2021[132](index=132&type=chunk) - Unfunded capital commitments totaled **$10.1 million** for one PSV and other equipment, with **$9.2 million** payable in the remainder of 2021. An additional **$9.5 million** order for one FSV has been indefinitely deferred[130](index=130&type=chunk) Contractual Long-Term Debt Maturities (in thousands) | Period | Amount | | :--- | :--- | | Remainder 2021 | $25,356 | | 2022 | $38,484 | | 2023 | $243,703 | | 2024 | $134,523 | | 2025 | $11,365 | | Subsequent to 2025 | $60,144 | | **Total** | **$513,575** | [Quantitative and Qualitative Disclosures About Market Risk](index=42&type=section&id=Item%203.%20Quantitative%20and%20Qualitative%20Disclosures%20About%20Market%20Risk) No material change in market risk exposure during Q1 2021 compared to the 2020 Annual Report disclosures - There has been **no material change** in the Company's exposure to market risk during the three months ended March 31, 2021[144](index=144&type=chunk) [Controls and Procedures](index=43&type=section&id=Item%204.%20Controls%20and%20Procedures) Management concluded disclosure controls and procedures were effective as of March 31, 2021, with no material changes - The Company's principal executive officer and principal financial officer concluded that the Company's disclosure controls and procedures were **effective** as of March 31, 2021[145](index=145&type=chunk) - **No changes occurred** in the Company's internal control over financial reporting during the quarter that have materially affected, or are reasonably likely to materially affect, the controls[147](index=147&type=chunk) Part II. [Other Information](index=44&type=section&id=Part%20II.%20Other%20Information) [Legal Proceedings](index=44&type=section&id=Item%201.%20Legal%20Proceedings) Refers to Note 9 for legal proceedings, including a Brazilian tax notice and the SEACOR Power capsizing incident - For information on legal proceedings, the report directs readers to "**Note 9. Commitments and Contingencies**" in the financial statements[149](index=149&type=chunk) [Risk Factors](index=44&type=section&id=Item%201A.%20Risk%20Factors) Updated risk factors highlight the SEACOR Power capsizing, detailing investigations, litigation, and financial impact - The capsizing of the SEACOR Power on April 13, 2021, resulted in the **death of several crew members** and the **total loss of the vessel**. The company is responsible for **costly and lengthy salvage operations**[152](index=152&type=chunk) - The incident is under investigation by the NTSB and U.S. Coast Guard, which could take **two years or longer** and may result in **fines, penalties, or operating restrictions**[153](index=153&type=chunk) - Several civil lawsuits have been filed against the company by family members of deceased crew members, and more are possible. The outcome and potential losses are **uncertain but could be significant**[154](index=154&type=chunk) [Unregistered Sales of Equity Securities and Use of Proceeds](index=45&type=section&id=Item%202.%20Unregistered%20Sales%20of%20Equity%20Securities%20and%20Use%20of%20Proceeds) Company acquired **51,933** shares for **$261,433** to cover tax obligations from equity incentive plan vesting Common Stock Purchases in Q1 2021 | Period | Total Shares Withheld | Average Price per Share | | :--- | :--- | :--- | | Jan 1 - Jan 31, 2021 | 14,199 | $3.34 | | Feb 1 - Feb 28, 2021 | — | — | | Mar 1 - Mar 31, 2021 | 37,734 | $5.67 | | **Total Q1 2021** | **51,933** | **N/A** | [Exhibits](index=46&type=section&id=Item%206.%20Exhibits) Lists exhibits filed with Form 10-Q, including credit facility amendments, officer certifications, and XBRL data files - **Key exhibits filed** include amendments to a credit facility (**Exhibit 10.01**), CEO and CFO certifications (**Exhibits 31.1, 31.2, 32**), and interactive data files (**Exhibits 101, 104**)[163](index=163&type=chunk)

Part I [Item 1. Business](index=3&type=section&id=Item%201.%20Business) SEACOR Marine provides global marine and support transportation services to offshore energy facilities, operating a diverse fleet globally [Business Overview](index=3&type=section&id=Business%20Overview) The company provides global marine transportation services to offshore energy facilities, operating a diverse fleet of support vessels - The Company provides global marine and support transportation services to offshore energy facilities, including **oil & gas installations** and **wind farms**[15](index=15&type=chunk) Fleet Composition as of December 31, 2020 | Vessel Type | Owned | Joint Ventured | Leased-in | Managed | Total | Average Age (Years) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Supply | 15 | 27 | — | 1 | 43 | 4 | | FSV | 26 | 5 | 1 | 1 | 33 | 8 | | Liftboats | 14 | — | 1 | — | 15 | 13 | | AHTS | 4 | — | 2 | — | 6 | 12 | | Specialty | — | 3 | — | — | 3 | — | | CTV Assets Held for Sale | 40 | 5 | — | — | 45 | 10 | | CTV Continuing Operations | 1 | — | — | — | 1 | 12 | | **Total** | **100** | **40** | **4** | **2** | **146** | **7** | - The company operates in five main geographic regions: the **United States (Gulf of Mexico)**, **Africa (West Africa)**, **Middle East & Asia**, **Latin America**, and **Europe (North Sea)**[27](index=27&type=chunk) - In 2020, **SEACOR Marine Arabia LLC** and **Exxon Mobil** accounted for **21%** and **17%** of consolidated operating revenues, respectively, with the top ten customers comprising approximately **76%**[36](index=36&type=chunk) [Government Regulation](index=8&type=section&id=Government%20Regulation) The company's operations are subject to extensive international, federal, and state regulations, including the Jones Act, MARPOL, and OPA 90 - The Company is subject to the **Jones Act**, limiting non-U.S. citizen ownership to **22.5%** of its capital stock to restrict U.S. coastwise trade[44](index=44&type=chunk)[45](index=45&type=chunk) - Operations are governed by international conventions including **MARPOL** (pollution prevention), **SOLAS** (safety at sea), and the **MLC** (maritime labor conditions)[46](index=46&type=chunk)[47](index=47&type=chunk) - The company is subject to the **Oil Pollution Act of 1990 (OPA 90)**, establishing strict liability for oil spills in U.S. waters, with non-tank vessel liability limited to the greater of **$1,100 per gross ton** or **$939,800**[56](index=56&type=chunk)[58](index=58&type=chunk) - As of January 1, 2020, **MARPOL** regulations require vessels to use fuel with a sulfur content no greater than **0.5%**, a significant reduction from the previous **3.5%** limit[73](index=73&type=chunk) [Employees and Human Capital Management](index=14&type=section&id=Employees%20and%20Human%20Capital%20Management) The company emphasizes its ESG program, focusing on health, safety, diversity, and employee development, achieving its best safety performance in 2020 - A **Sustainability Council** was formed on September 17, 2020, to oversee the company's enhanced **ESG program**, reporting to the Board's Nominating and Corporate Governance Committee[86](index=86&type=chunk)[87](index=87&type=chunk) - As of December 31, 2020, the company employed **1,386 individuals** from over **34 countries**, with **29%** of the onshore workforce being female[88](index=88&type=chunk)[92](index=92&type=chunk) - In fiscal year 2020, the company achieved its best safety performance with **zero pollution incidents**, **zero medical incidents**, and a total recordable incident rate of **0.037** over **5.4 million man-hours**[89](index=89&type=chunk) [Item 1A. Risk Factors](index=16&type=section&id=Item%201A.%20Risk%20Factors) The company faces significant risks from fluctuating oil and gas prices, COVID-19, intense competition, regulatory changes, and financial constraints - The business is highly sensitive to fluctuating **oil and natural gas prices**, which negatively impacted fleet utilization to **55% in 2020**, **60% in 2019**, and **52% in 2018**[101](index=101&type=chunk)[102](index=102&type=chunk) - The **COVID-19 pandemic** has decreased demand for oil and services, posing operational risks to the workforce through health issues and travel restrictions[108](index=108&type=chunk)[109](index=109&type=chunk) - The company faces high levels of competition and an **oversupply of vessels**, which has depressed charter and utilization rates[120](index=120&type=chunk)[123](index=123&type=chunk) - Compliance with the **Jones Act** requires non-U.S. citizens to own no more than **25%** of the company's stock, with the charter restricting this to **22.5%**, potentially affecting stock liquidity[148](index=148&type=chunk)[152](index=152&type=chunk)[153](index=153&type=chunk) [Item 2. Properties](index=45&type=section&id=Item%202.%20Properties) The company's principal physical properties consist of its fleet of offshore support vessels - The company's main physical properties are its **offshore support vessels**[209](index=209&type=chunk) [Item 3. Legal Proceedings](index=45&type=section&id=Item%203.%20Legal%20Proceedings) The company is involved in various litigation matters in the normal course of business, with management not expecting a material adverse effect on its financial position or results - The company is involved in various litigation matters arising from the normal course of business, but management does not anticipate these to have a **material adverse effect** on its financial condition[209](index=209&type=chunk) [Executive Officers of the Registrant](index=46&type=section&id=Executive%20Officers%20of%20the%20Registrant) This section lists the current executive officers of SEACOR Marine, including their names, ages, and positions held Executive Officers | Name | Age | Position | | :--- | :--- | :--- | | John Gellert | 50 | President, Chief Executive Officer and a director | | Jesús Llorca | 45 | Executive Vice President and Chief Financial Officer | | Gregory Rossmiller | 51 | Senior Vice President and Chief Accounting Officer | | Andrew H. Everett II | 38 | Senior Vice President, General Counsel and Secretary | Part II [Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities](index=47&type=section&id=Item%205.%20Market%20for%20Registrant%27s%20Common%20Equity%2C%20Related%20Stockholder%20Matters%20and%20Issuer%20Purchases%20of%20Equity%20Securities) SEACOR Marine's common stock trades on the NYSE under "SMHI," with no current dividend intention and no repurchases in Q4 2020 - The company's common stock trades on the **New York Stock Exchange (NYSE)** under the symbol **\"SMHI\"**[214](index=214&type=chunk) - The company does not intend to pay dividends for the foreseeable future, retaining earnings to repay debt and fund growth[215](index=215&type=chunk) - No shares of common stock were repurchased by the company during the **fourth quarter of 2020**[216](index=216&type=chunk) [Item 6. Selected Financial Data](index=48&type=section&id=Item%206.%20Selected%20Financial%20Data) This section presents selected historical consolidated financial data for the five years ended December 31, 2020, showing declining revenues and persistent net losses Selected Historical Financial Data (in thousands, except per share data) | | 2020 | 2019 | 2018 | 2017 | 2016 | | :--- | :--- | :--- | :--- | :--- | :--- | | **Net Operating Revenues** | $141,141 | $174,453 | $179,161 | $98,499 | $132,589 | | **Net Loss from Continuing Operations** | $(83,413) | $(90,963) | $(82,980) | $(38,979) | $(130,857) | | **Loss from Continuing Operations Per Common Share** | $(3.20) | $(3.22) | $(3.75) | $(1.89) | $(7.34) | | **Total Assets** | $1,017,663 | $1,009,193 | $1,102,938 | $1,008,504 | $1,015,119 | | **Long-term Obligations** | $444,960 | $364,969 | $363,335 | $267,321 | $196,223 | [Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations](index=49&type=section&id=Item%207.%20Management%27s%20Discussion%20and%20Analysis%20of%20Financial%20Condition%20and%20Results%20of%20Operations) Management discusses financial condition and operations, highlighting volatile offshore market impacts, recent asset sales, and liquidity management strategies [Recent Developments](index=49&type=section&id=Recent%20Developments) Recent developments include amending the FGUSA Credit Facility, selling the Windcat Workboats CTV business, and an anticipated CARES Act tax refund - On January 12, 2021, the company completed the sale of its **Windcat Workboats CTV Business**, receiving net cash proceeds of approximately **$42.6 million**, with the buyer assuming approximately **£20.4 million** of debt[225](index=225&type=chunk) - The company expects to receive an estimated **$31.2 million tax refund** under the **CARES Act**, treated as cash for certain debt covenant calculations[226](index=226&type=chunk) [Trends Affecting the Offshore Marine Business](index=50&type=section&id=Trends%20Affecting%20the%20Offshore%20Marine%20Business) The offshore marine business is highly cyclical, correlated with volatile oil and gas prices, and impacted by COVID-19, leading to cold-stacking vessels - The market for offshore support vessels is highly correlated to volatile **oil and natural gas prices**, negatively impacting exploration and production activity since **2014**[227](index=227&type=chunk)[228](index=228&type=chunk) - The company utilizes **cold-stacking vessels** to reduce operating costs during weak demand, with **22 of 64** owned and leased-in vessels cold-stacked as of December 31, 2020[231](index=231&type=chunk) [Consolidated Results of Operations](index=54&type=section&id=Consolidated%20Results%20of%20Operations) In 2020, operating revenues decreased to **$141.8 million** from **$174.5 million** in 2019, driven by lower fleet utilization, resulting in an operating loss Consolidated Results of Operations (in thousands) | | 2020 | 2019 | 2018 | | :--- | :--- | :--- | :--- | | **Operating revenues** | $141,837 | $174,453 | $179,161 | | **Operating Loss** | $(71,639) | $(54,328) | $(68,414) | | **Loss from Continuing Operations** | $(83,346) | $(90,964) | $(82,979) | | **Net Loss attributable to SEACOR Marine** | $(78,915) | $(92,837) | $(77,608) | Time Charter Statistics | | 2020 | 2019 | 2018 | | :--- | :--- | :--- | :--- | | **Average Rates Per Day Worked ($)** | $10,905 | $10,369 | $9,877 | | **Fleet Utilization (%)** | 55% | 60% | 52% | - In 2020, the company recorded **$13.5 million** in impairment charges on its liftboat fleet and one specialty vessel, and recognized net losses of **$5.3 million** on asset disposals[285](index=285&type=chunk) [Liquidity and Capital Resources](index=69&type=section&id=Liquidity%20and%20Capital%20Resources) The company's liquidity is sourced from cash balances, operations, asset sales, and financing, with **$36.0 million** cash as of December 31, 2020 - As of December 31, 2020, the company had cash, cash equivalents, and restricted cash of **$36.0 million**, supplemented by **$42.6 million** from the Windcat Workboats sale in January 2021[307](index=307&type=chunk) Summary of Cash Flows (in thousands) | | 2020 | 2019 | 2018 | | :--- | :--- | :--- | :--- | | **Cash flows (used in) provided by Operating Activities** | $(29,723) | $1,662 | $(63,591) | | **Cash flows provided by (used in) Investing Activities** | $3,823 | $31,030 | $(26,796) | | **Cash flows (used in) provided by Financing Activities** | $(22,598) | $(25,942) | $68,252 | - As of December 31, 2020, the company had unfunded capital commitments of **$11.7 million**, primarily for one PSV and miscellaneous equipment[305](index=305&type=chunk) - Total contractual long-term debt maturities as of December 31, 2020, amount to **$521.9 million**, with significant maturities in **2023 ($245.0 million)** and **2024 ($134.5 million)**[306](index=306&type=chunk)[307](index=307&type=chunk) [Critical Accounting Policies and Estimates](index=75&type=section&id=Critical%20Accounting%20Policies%20and%20Estimates) Management identifies critical accounting policies requiring significant estimates, including revenue recognition, asset impairment, and income tax provisions - The company's critical accounting policies involve significant management estimates, including **useful lives of property and equipment**, **impairment assessments**, **income tax provisions**, and **allowance for credit losses**[332](index=332&type=chunk) - The company performs impairment analysis of long-lived assets when indicators are present, recording an impairment charge if carrying values are not recoverable based on future undiscounted cash flows[347](index=347&type=chunk) - For vessel classes not impaired as of December 31, 2020, estimated future undiscounted cash flows exceed carrying values by more than **40%**, though these estimates are highly subjective and depend on market recovery[242](index=242&type=chunk) [Item 7A. Quantitative and Qualitative Disclosures About Market Risk](index=79&type=section&id=Item%207A.%20Quantitative%20and%20Qualitative%20Disclosures%20About%20Market%20Risk) The company is exposed to market risks from foreign currency exchange rates and interest rate fluctuations, managed through forward contracts and interest rate swaps - The company is exposed to **foreign currency risk** and uses forward contracts to hedge, recording a **$0.9 million loss** on a **£31.5 million** swap related to Windcat sale proceeds[350](index=350&type=chunk) - As of December 31, 2020, the company had **$288.2 million** in unhedged variable rate debt; a **1% increase in LIBOR** would increase annual interest payments by approximately **$2.8 million**[351](index=351&type=chunk) [Item 9A. Controls and Procedures](index=79&type=section&id=Item%209A.%20Controls%20and%20Procedures) As of December 31, 2020, management concluded that the company's disclosure controls and internal control over financial reporting were effective - Management, including the CEO and CFO, concluded that the company's **disclosure controls and procedures** were effective as of **December 31, 2020**[354](index=354&type=chunk) - Management concluded that the company's **internal control over financial reporting** was effective as of **December 31, 2020**, based on the **COSO 2013 framework**[359](index=359&type=chunk) Part III [Items 10-14](index=81&type=section&id=Items%2010-14) Information for Items 10 through 14 is incorporated by reference from the company's forthcoming definitive proxy statement - Information for **Items 10, 11, 12, 13, and 14** is incorporated by reference from the company's forthcoming definitive proxy statement[363](index=363&type=chunk)[365](index=365&type=chunk)[366](index=366&type=chunk)[367](index=367&type=chunk)[368](index=368&type=chunk) Part IV [Item 15. Exhibits, Financial Statement Schedules](index=82&type=section&id=Item%2015.%20Exhibits%2C%20Financial%20Statement%20Schedules) This section contains the company's audited consolidated financial statements, the independent auditor's report, and a list of all exhibits filed with the Form 10-K - This part includes the company's **audited consolidated financial statements**, the **independent auditor's report**, and a list of all exhibits filed with the **10-K**[370](index=370&type=chunk)[371](index=371&type=chunk) - The independent registered public accounting firm, **Grant Thornton LLP**, issued an **unqualified opinion** on the financial statements, affirming fair presentation in conformity with **U.S. GAAP**[385](index=385&type=chunk)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-37966 SEACOR Marine Holdings Inc. (Exact Name of Registrant as Specified in Its Charter) Delaware 47-2564547 (State or Other Jur ...