Investment adviser · CRD 131471

KELSO & COMPANY, L.P.

Investment adviser filing (IA)

NEW YORK, NY, United States · Form ADV filed Apr 30, 2026

Regulatory AUM: $14.3B
Client accounts: 54
Employees: 64
Advisory professionals: 38

Who they report serving

Form ADV · Item 5.D

Client types and their share of reported regulatory assets.

Client type	Clients	Regulatory assets	Share of AUM
Pooled investment vehicles	54	$14,323,432,504	100.0%

Filing source

Form ADV 2097541 · Apr 30, 2026 · Item 5.D

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

Private funds & service providers

50+ Private funds

The count excludes feeder funds. Funds in the latest filing appear first, ordered by reported gross assets. Earlier funds retain their last reported values.

Browse the first 49 funds across 7 pages.

KELSO INVESTMENT ASSOCIATES X, L.P.Private Equity Fund · Last reported Apr 30, 2026$3.87BGross asset value

Form D fundraising filings

Kelso Investment Associates X, L.P.

Feeder funds

KIA X FEEDER, L.P.

Fund administrator GEN II FUND SERVICES, LLC NEW YORK, New York, United States Investor statements: No (provided to no investors) Related to adviser: No

Auditor DELOITTE & TOUCHE LLP NEW YORK, New York, United States

Custodian JPMORGAN CHASE & CO. NEWARK, Delaware, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

DELOITTE & TOUCHE LLP
PCAOB 34

Fund details & source

Fund ID: 805-2239040966
Reported beneficial owners: 149
Minimum commitment: $10M
Form D file number: 021-307459
Form D file number: 021-307463

Form ADV 2097541 · Apr 30, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

KELSO INVESTMENT ASSOCIATES XI, L.P.Private Equity Fund · Last reported Apr 30, 2026$3.36BGross asset value

Form D fundraising filings

Kelso Investment Associates XI, L.P.

Feeder funds

KIA XI FEEDER, L.P.

Fund administrator GEN II FUND SERVICES, LLC NEW YORK, New York, United States Investor statements: No (provided to no investors) Related to adviser: No

Auditor DELOITTE & TOUCHE LLP NEW YORK, New York, United States

Custodian JPMORGAN CHASE & CO. NEWARK, Delaware, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

DELOITTE & TOUCHE LLP
PCAOB 34

Fund details & source

Fund ID: 805-7890652699
Reported beneficial owners: 182
Minimum commitment: $10M
Form D file number: 021-414832
Form D file number: 021-414833

Form ADV 2097541 · Apr 30, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

KELSO INVESTMENT ASSOCIATES IX, L.P.Private Equity Fund · Last reported Apr 30, 2026$1.01BGross asset value

Form D fundraising filings

Kelso Investment Associates IX, L.P.

Feeder funds

KIA IX FEEDER, L.P.

Auditor DELOITTE & TOUCHE LLP NEW YORK, New York, United States

Custodian JPMORGAN CHASE & CO. NEWARK, Delaware, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: No
External marketing: No

DELOITTE & TOUCHE LLP
PCAOB 34

Fund details & source

Fund ID: 805-6030359386
Reported beneficial owners: 128
Minimum commitment: $10M
Form D file number: 021-227684
Form D file number: 021-227685

Form ADV 2097541 · Apr 30, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

KELSO BREATHE INVESTOR (DE), L.P.Private Equity Fund · Last reported Apr 30, 2026$628MGross asset value

Form D fundraising filings

Kelso Breathe Investor (DE), L.P.

Fund administrator GEN II FUND SERVICES, LLC NEW YORK, New York, United States Investor statements: No (provided to no investors) Related to adviser: No

Auditor DELOITTE & TOUCHE LLP NEW YORK, New York, United States

Custodian JP MORGAN CHASE & CO. NEWARK, Delaware, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

DELOITTE & TOUCHE LLP
PCAOB 34

Fund details & source

Fund ID: 805-7867670718
Reported beneficial owners: 16
Minimum commitment: $0
Form D file number: 021-389085

Form ADV 2097541 · Apr 30, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

KELSO BREATHE INVESTOR, L.P.Private Equity Fund · Last reported Apr 30, 2026$628MGross asset value

Form D fundraising filings

Kelso Breathe Investor, L.P.

Fund administrator GEN II FUND SERVICES, LLC NEW YORK, New York, United States Investor statements: No (provided to no investors) Related to adviser: No

Auditor DELOITTE & TOUCHE LLP NEW YORK, New York, United States

Custodian JPMORGAN CHASE & CO. NEWARK, Delaware, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

DELOITTE & TOUCHE LLP
PCAOB 34

Fund details & source

Fund ID: 805-7486483156
Reported beneficial owners: 16
Minimum commitment: $0
Form D file number: 021-389083

Form ADV 2097541 · Apr 30, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

KEP VI, LLCPrivate Equity Fund · Last reported Apr 30, 2026$553MGross asset value

Auditor DELOITTE & TOUCHE LLP NEW YORK, New York, United States

Custodian JPMORGAN CHASE & CO. NEWARK, Delaware, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: No
External marketing: No

DELOITTE & TOUCHE LLP
PCAOB 34

Fund details & source

Fund ID: 805-7985284021
Reported beneficial owners: 170
Minimum commitment: $0

Form ADV 2097541 · Apr 30, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

KELSO BREATHE INVESTOR 2, L.P.Private Equity Fund · Last reported Apr 30, 2026$518MGross asset value

Form D fundraising filings

Kelso Breathe Investor 2, L.P.

Fund administrator GEN II FUND SERVICES, LLC NEW YORK, New York, United States Investor statements: No (provided to no investors) Related to adviser: No

Auditor DELOITTE & TOUCHE LLP NEW YORK, New York, United States

Custodian JPMORGAN CHASE & CO. NEWARK, Delaware, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: Yes
External marketing: No

DELOITTE & TOUCHE LLP
PCAOB 34

Fund details & source

Fund ID: 805-5097466376
Reported beneficial owners: 6
Minimum commitment: $0
Form D file number: 021-389089

Form ADV 2097541 · Apr 30, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

Services & filing details

Most recent filing: Apr 30, 2026. View historical filings

Reported services

Pooled investment vehicle management

Compensation

Percentage of assets · Performance-based

Principal office

299 PARK AVENUE, 30TH FL
NEW YORK, NY, 10171, United States

CRD 131471

Filing source

Form ADV 2097541 · Apr 30, 2026 · Items 1 & 5

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.