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Joseph Hartswell

Managing Director and Chief Compliance Officer at New Mountain Finance Advisers

Officer record from the firm’s Form ADVForm ADV filed 1 June 2026

Joseph Hartswell is Managing Director and Chief Compliance Officer of New Mountain Finance Advisers, L.L.C., a New York investment adviser.

Role at New Mountain Finance Advisers

Title on Schedule A
Managing Director and Chief Compliance Officer
Control
Joseph Hartswell is not a control person of New Mountain Finance Advisers.
Ownership
An individual ownership band is not available in the source record.
Tenure
Joseph Hartswell has held the filed role since March 2022.

The firm

New Mountain Finance Advisers, L.L.C.
New York, NY

Form ADV filed 1 June 2026

$11.2B AUM13 clients45 advisers9 offices

Career on record

The IAPD individual lookup on 18 October 2026 returned no individual record. This profile uses the firm’s Form ADV officer listing.

Registrations and exams

Individual registration and examination information for Joseph Hartswell is unavailable. An officer title or CRD number does not by itself establish current investment adviser representative registration, and no registration or examination counts are inferred.

Officer record

Full name
Joseph Hartswell
CRD
5381455
Firm
New Mountain Finance Advisers, L.L.C.
Record basis
Form ADV officer listing

This directory does not report disciplinary history, for any firm or individual, in either direction. The SEC publishes the complete record, including any disciplinary events, and it is the authoritative place to check one. Check this record on adviserinfo.sec.gov

Common questions

Where does Joseph Hartswell work?

Joseph Hartswell has been Managing Director and Chief Compliance Officer of New Mountain Finance Advisers, L.L.C. since March 2022.

Source: Form ADV, Schedule A, filed 1 June 2026

Leadership at New Mountain Finance Advisers

  • John Kline
    Managing Director and Chief Executive Officer
  • Adam Weinstein
    Managing Director, President and Firm Chief Operating Officer
  • Laura Boswerger
    Managing Director and Credit Chief Operating Officer, Chief Financial Officer
  • Kellie Steele
    Director and Net Lease Chief Financial Officer
  • Peter Kaplan
    Managing Director and Portfolio Manager
  • Steven Klinsky
    Founder

Sources

  1. IAPD individual lookup, CRD 5381455. This profile uses the Form ADV officer listing; the individual lookup did not provide a current investment-adviser record.
  2. Form ADV Part 1A, Schedules A and B of New Mountain Finance Advisers, L.L.C., filed 1 June 2026. Title, control and ownership bands.

Retrieved 18 October 2026. The SEC record may have been amended since.

Report a correction

This profile is compiled from public regulatory records and the firm's own published materials, and is provided for informational purposes only. Niva Wealth is not affiliated with Joseph Hartswell or New Mountain Finance Advisers, L.L.C. and makes no representation about the quality of their services. This directory does not report disciplinary history, in either direction.