Private company

New Mountain Guardian IV Income Fund, L.L.C.

Investment fund that raised $490.5 million in 2023 (SEC Form D)2

In its 2026 annual report the company says: “We are a closed-end, non-diversified management investment company that has elected to be regulated as a business development company under the Investment Company Act of 1940, as amended. We have elected to be treated for United States federal income tax purposes, and intend to comply with the requirements to continue to qualify annually, as a regulated investment company under Subchapter M of the Internal Revenue Code of 1986, as amended.”4 It is headquartered in New York, United States.2

Last updated Oct 20, 2026.

Overview

  • HeadquartersNew York, United States2
  • Incorporated inDE3
  • Business address1633 Broadway, 48Th Floor, New York, Ny 100193
  • Filer category, Emerging growth company3
  • Legal formLimited Liability Company2
  • Kind of organizationInvestment fund2
  • LEI5299003L3KOSD5Q9BN562
  • StatusActive2
  • LEI statusLapsed (not renewed)2
  • Registered addressc/o The Corporation Trust Company, Corporation Trust Center, 1209 Orange Street, 19801 Wilmington, United States2
  • Registered withDivision of Corporations, Department of State, 71224522

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New Mountain Guardian IV Income Fund L.L.C. ("we", "us" or "our"), formerly known as New Mountain Guardian IV Unlevered BDC, L.L.C., is a Delaware limited liability company formed on November 4, 2022. We are a closed-end, non-diversified management investment company that has elected to be regulated as a business development company ("BDC") under the Investment Company Act of 1940, as amended (the "1940 Act"). We have elected to be treated for United States ("U.S.") federal income tax purposes, and intend to comply with the requirements to continue to qualify annually, as a regulated investment company ("RIC") under Subchapter M of the Internal Revenue Code of 1986, as amended (the "Code"). New Mountain Guardian IV Income Fund SPV, L.L.C. ("GIV Income SPV"), our wholly owned direct subsidiary, was formed on December 18, 2025 as a Delaware limited liability company.4 From its latest annual report

Financials

From the company’s reports to the SEC. Every number links to the filing it came from.

Financial statements

Net income5$27.8M in 2025+34% since 2024
0$10.0M$20.0M$30.0M2024: $20.7M$20.7M20242025: $27.8M$27.8M2025+34%
Fiscal year2023202420252026
Net income$20.7M5$27.8M5
Earnings per share$1.015$0.735
Earnings per share (diluted)$1.015$0.735
Shares (weighted, basic)20.5M shares537.8M shares5
Shares (weighted, diluted)20.5M shares537.8M shares5

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Corporate structure

New Mountain Guardian IV Income Fund, L.L.C. sits at the top of its group. 1 entity, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of New Mountain Guardian IV Income Fund, L.L.C.

  • De Retraite D'Hydro-Quebec Caisse Filed SCHEDULE 13G/A on New Mountain Guardian IV Income Fund, L.L.C., latest Feb 14, 2025 (4 filings since Sep 29, 2023)
  • Suva Filed SCHEDULE 13G/A on New Mountain Guardian IV Income Fund, L.L.C., latest Jan 27, 2025 (3 filings since Dec 28, 2023)
  • New Mountain Guardian IV Income Rated Feeder II, Ltd. Filed SC 13D/A on New Mountain Guardian IV Income Fund, L.L.C., latest Dec 10, 2024 (3 filings since May 9, 2024)
  • S.a.u. De Seguros Y. Reaseguros Vidacaixa Filed SC 13D/A on New Mountain Guardian IV Income Fund, L.L.C., latest Sep 18, 2024 (3 filings since Oct 27, 2023)
  • New Mountain Guardian Investments IV Unlevered, L.L.C. Filed SC 13D/A on New Mountain Guardian IV Income Fund, L.L.C., latest May 9, 2024 (3 filings since Oct 27, 2023)
  • New Mountain Guardian IV Income Fund, L.L.C. New York, New York, United States

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

What it owns

What New Mountain Guardian IV Income Fund, L.L.C. reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Investments

ItemLatestA year beforeChange
Cash and cash equivalents$35.0M5 Dec 31, 2025$19.6M5 Dec 31, 2024+79.0%

Properties, in its own words

We do not own any real estate or other physical properties materially important to our operations. Our principal executive offices are located at 1633 Broadway, 48th Floor, New York, New York 10019, where we occupy our office space pursuant to our Administration Agreement with the Administrator. The office space is shared with our Investment Adviser, our Administrator and New Mountain Capital. We believe that our current office facilities are suitable and adequate for our business as currently conducted.

Item 2 of the 10-K filed Mar 5, 2026.4

Leadership

Who has led New Mountain Guardian IV Income Fund, L.L.C., and when. Pick a name to see everywhere that person has worked.

Chief financial officer

  1. Laura Holson Boswerger2023
  2. Kris Corbett2023

Chief operating officer

  1. Laura Holson Boswerger2023
2025
Board members and other officers (7)

Named in SEC Form D filings

People the company listed in its private-offering notices.

  • Director, President and Chief Executive OfficerJohn R. Kline named Aug 2, 202419
  • Chief Operating OfficerLaura C. Holson named Aug 2, 202419

Former names

  • New Mountain Guardian IV Unlevered BDC, L.L.C.May 17, 2023 to Jul 6, 20233

Timeline

  1. Aug 12, 20268-K Regulation FD disclosure20
  2. May 13, 20268-K Regulation FD disclosure21
  3. May 7, 20268-K Executive or director change22
  4. Apr 22, 20268-K Regulation FD disclosure23
  5. Mar 24, 20268-K Executive or director change24
  6. Jan 16, 20268-K Entered a material agreement; New debt or obligation; Executive or director change25
  7. Dec 3, 20258-K Unregistered sale of shares26
  8. Nov 10, 20258-K Unregistered sale of shares27
  9. Sep 18, 20258-K Unregistered sale of shares28
  10. Jun 18, 20258-K Unregistered sale of shares29
  11. Dec 23, 20248-K Unregistered sale of shares30
  12. Dec 9, 20248-K Entered a material agreement; Unregistered sale of shares31
  13. Nov 4, 2022Founded New Mountain Guardian IV Income Fund, L.L.C. is founded2

Filings

108 filings to the SEC since October 2021: 3 annual reports, 10 quarterly reports, 26 major events, 42 insider forms, 16 large holders, 3 private raises, 8 other. The latest 20:

  1. Aug 12, 20268-K EDGAR
  2. Aug 12, 202610-Q EDGAR
  3. Jun 3, 202640-17G EDGAR
  4. May 13, 20268-K EDGAR
  5. May 13, 202610-Q EDGAR
  6. May 7, 20268-K EDGAR
  7. Apr 22, 20268-K EDGAR
  8. Mar 24, 20268-K EDGAR
  9. Mar 5, 202610-K EDGAR
  10. Jan 26, 20263 EDGAR
  11. Jan 16, 20268-K EDGAR
  12. Dec 3, 20258-K EDGAR
  13. Dec 3, 20254 EDGAR
  14. Dec 3, 20254 EDGAR
  15. Dec 2, 20254 OWNERSHIP DOCUMENT EDGAR
  16. Nov 13, 202510-Q EDGAR
  17. Nov 10, 20258-K EDGAR
  18. Nov 6, 20254 EDGAR
  19. Nov 6, 20254 EDGAR
  20. Nov 6, 20254 OWNERSHIP DOCUMENT EDGAR

The 108 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Insider trades

26 open-market trades by officers, directors and large owners since October 2021: 26 buys and 0 sales. Grants, option exercises and gifts are left out.

DateWhoTradeSharesPriceValueFiling
Dec 1, 2025New Mountain Guardian IV Rated Feeder III, Ltd.10% ownerBuy1,500,000$10.00$15.0MForm 4
Dec 1, 2025Caisse de retraite d'Hydro-Quebec10% ownerBuy500,000$10.00$5.0MForm 4
Dec 1, 2025Suva10% ownerBuy382,500$10.00$3.8MForm 4
Nov 4, 2025New Mountain Guardian IV Income Rated Feeder II, Ltd.10% ownerBuy3,600,000$10.00$36.0MForm 4
Nov 4, 2025Caisse de retraite d'Hydro-Quebec10% ownerBuy1,200,000$10.00$12.0MForm 4
Nov 4, 2025Suva10% ownerBuy918,000$10.00$9.2MForm 4
Sep 16, 2025New Mountain Guardian IV Income Rated Feeder II, Ltd.10% ownerBuy2,400,000$10.00$24.0MForm 4
Sep 16, 2025Caisse de retraite d'Hydro-Quebec10% ownerBuy800,000$10.00$8.0MForm 4
Sep 16, 2025Suva10% ownerBuy612,000$10.00$6.1MForm 4
Jun 13, 2025Caisse de retraite d'Hydro-Quebec10% ownerBuy1,000,000$10.00$10.0MForm 4
Jun 13, 2025Suva10% ownerBuy765,000$10.00$7.7MForm 4
Jun 13, 2025New Mountain Guardian IV Income Rated Feeder II, Ltd.10% ownerBuy3,000,000$10.00$30.0MForm 4
Dec 20, 2024Suva10% ownerBuy1,423,500$10.00$14.2MForm 4
Dec 6, 2024Caisse de retraite d'Hydro-Quebec10% ownerBuy500,000$10.00$5.0MForm 4
Dec 6, 2024New Mountain Guardian IV Income Rated Feeder II, Ltd.10% ownerBuy1,500,000$10.00$15.0MForm 4
Dec 6, 2024Suva10% ownerBuy273,000$10.00$2.7MForm 4
Sep 16, 2024Caisse de retraite d'Hydro-Quebec10% ownerBuy1,000,000$10,000,000.00$10.0TForm 4
Sep 16, 2024New Mountain Guardian IV Income Rated Feeder II, Ltd.10% ownerBuy3,000,000$10.00$30.0MForm 4
Sep 16, 2024Suva10% ownerBuy546,000$10.00$5.5MForm 4
May 2, 2024Suva10% ownerBuy620,000$10.00$6.2MForm 4

All 26 trades can be filtered by person here when JavaScript is on.

From Forms 4 filed with the SEC.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

Money raised

Private offerings the company reported to the SEC on Form D.

  1. May 23, 2023Raised $490.5 million in a private offering of equity Form D: 11 investors so far Form D

SEC filer profile

How New Mountain Guardian IV Income Fund, L.L.C. is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

  • Name on EDGARNew Mountain Guardian IV Income Fund, L.L.C.1
  • CIK0001976719
  • Employer ID (EIN)92-09640744
  • Filer statusNon-accelerated filer an emerging growth company; not a smaller reporting company; not a shell company4
  • Incorporated inDelaware4
  • Fiscal year endsDecember 311
  • Business address1633 Broadway, 48Th Floor, New York, NY 100191
  • Phone212-720-03001
  • Shares outstanding51,240,500 as of Aug 12, 20268
  • Public float$0 as of Jun 30, 20255
  • AuditorDELOITTE & TOUCHE LLP, New York, New York PCAOB ID 34; no auditor attestation of internal control over financial reporting4
  • On EDGAR sinceMay 17, 20231
  • Filings111 in all: 4 (27), 8-K (26), 3 (14), 10-Q (10), SC 13D/A (6), 40-17G (4), 10-K (3), SC 13D (3)1
    All 20 form types

    SC 13G/A (3), 40-APP/A (2), D/A (2), SC 13G (2), SCHEDULE 13G/A (2), 10-12G (1), 10-12G/A (1), 3/A (1), 40-APP (1), CORRESP (1), D (1), N-54A (1)

  • Latest filingsAnnual report (10-K) Mar 5, 2026
    Quarterly report (10-Q) Aug 12, 2026
    Latest 8-K (8-K) Aug 12, 2026

Risk factors and legal proceedings

The risks New Mountain Guardian IV Income Fund, L.L.C. names in Item 1A of its 10-K filed Mar 5, 2026: 19 risks under these headings, as written.4

  • No Assurance of Investment Return
  • Above Average Degree of Risk
  • Role of New Mountain Capital and its Professionals; No Dedicated Investment Team
  • Compensation Arrangements
  • Indemnification
  • Limited Recourse
  • Misconduct of Employees and of Third‑Party Service Providers
  • Risk of Geopolitical Unrest, Terrorist Attacks, or Acts of War
  • Risk of Tariffs
  • Changes in U.S. Policy
  • Operating and Financial Risks of Portfolio Companies
  • Investments in Highly Leveraged Companies
The other 16 risks
  • Unfunded Debt Commitments and Follow‑On Investments
  • Portfolio Companies' Other Debts
  • Company‑Level Borrowings
  • "Covenant Lite" Loans
  • Broad Investment Mandate; Unspecified Investments
  • Risk of Limited Number of Investments; Dependence on Performance of Certain Investments
  • Influence over Management
  • Illiquid and Long‑Term Investments
  • Investments Longer Than Term
  • Highly Competitive Market for Investment Opportunities
  • Managing Future Growth
  • Economic Recessions and Government Spending Cuts
  • Portfolio Company Management
  • Lack of Control of Portfolio Companies
  • Investment in Restructurings
  • Investments in Private and Less Established Companies; Risk of Fraud in Portfolio Companies
  • Risks of Technology‑Related Investments
  • Non‑U.S. Investments
  • Hedging Policies/Risks
  • Hedging; Derivative Instruments
  • Debt and Mezzanine Investments
  • Equity Investments
  • Repurchase Agreements
  • Original Issue Discount and Payment‑In‑Kind Instruments
  • Risks Relating to Due Diligence of and Conduct at Portfolio Companies
  • Currency and Exchange Rate Risks
  • Public Company Holdings
  • Bridge Financings
  • Uncertainty of Financial Projections
  • Availability of Insurance Against Certain Catastrophic Losses
  • Global Climate Change Risk
  • Corporate Social Responsibility Risks
  • Force Majeure Risk
  • Developments in the Banking Sector
  • Dependence on Banking Relationships
  • No Market for Units; Transferability Restrictions
  • Status as a BDC
  • Valuation of Portfolio Investments
  • Management of the Company
  • Transactions with Affiliates
  • The Investment Adviser and Conflicts of Interest
  • License Agreement, Expenses Incurred and Conflicts of Interest including those Associated with the Valuation Process
  • Material, Non‑Public Information
  • FOIA and Similar Laws
  • Limited Access to Information
  • Possibility of Different Information Rights
  • Capital Calls
  • RIC Tax Treatment and Raising Additional Capital
  • Distributions
  • Failure to Raise Substantial Funds
  • Failure to Make Capital Contributions
  • Preferred Units
  • Removal of the Investment Adviser or Administrator; Cancellation of Investment Period; Early Termination of the Fund
  • Compliance with Anti‑Money Laundering Requirements
  • Fund Expenses
  • Executive Advisory Council
  • Systems and Operational Risks
  • Cybersecurity Breaches, Identity Theft and Other Disasters
  • Cyber-Attacks
  • Artificial Intelligence and Machine Learning Risk
  • CERTAIN MARKET, REGULATORY AND TAX RISKS
  • U.S. Capital Markets
  • U.S. Credit Rating, the Debt Ceiling and Interest Rate Volatility
  • Regulations Governing the Operations of BDCs
  • Fluctuations in our Annual and Quarterly Results
  • Exchange Act
  • Sarbanes‑Oxley Act
  • "Emerging Growth Company" Under the JOBS Act

Legal proceedings

Neither we nor the Investment Adviser and the Administrator were subject to any material legal proceedings, nor, to our knowledge, is any material legal proceeding threatened against us, the Investment Adviser or the Administrator as of December 31, 2025. From time to time, we or the Investment Adviser may be a party to certain legal proceedings in the ordinary course of business, including proceedings relating to the enforcement of our rights under loans to or other contracts with our portfolio companies. While the outcome of these legal proceedings cannot be predicted with certainty, we do not expect that these proceedings will have a material effect upon our financial condition or results of operations.

The opening of Item 3, Legal Proceedings.4

Sources

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