Form D · Private Equity Fund

Yorktown Energy Partners IX, L.P.

New York, NY · CIK 0001503466

Offering snapshot reported Oct 20, 2010 · SEC filing

Reported sold: $1.23B
Investors reported: 105
Minimum accepted: $700K
First sale: Oct 5, 2010

What changed?

Latest filing versus its linked predecessor, where available.

No comparable changes in the displayed metrics.

Filing history

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Filed	Filing type	Reported sold	Change vs linked filing	Investors	Source
Oct 20, 2010	Initial	$1,227,500,000	No comparison	105	SEC filing

Offering details

Securities: Pooled investment fund
Exemptions: 06, 3C, 3C.7
Duration over one year: No
Business combination: No

Sales commissions: $0
Finders' fees: $0
Form D file number: 021-149340

Source: Form D, filed Oct 20, 2010. Minimum accepted may differ from a standard advertised minimum.

Fund connections

The linked fund shows its most recently reported ADV details.

Matched by reported Form D file number

YORKTOWN ENERGY PARTNERS IX, L.P.

Investment adviser: YORKTOWN PARTNERS LLC

Gross asset value: $177M
Beneficial owners: 113
ADV minimum commitment: $1M

Reported in Form ADV on Mar 30, 2026. Fund assets and beneficial owners measure different things from Form D sales and investors.

Service providers

Fund administrator STATE STREET PRIVATE EQUITY FUND SERVICES, INC. CLIFTON, New Jersey, United States Investor statements: Yes (provided to all investors) Related to adviser: No

Auditor DELOITTE & TOUCHE LLP HOUSTON, Texas, United States

Custodian J.P. MORGAN CHASE BANK, N.A. NEW YORK, New York, United States Related to adviser: No

Custodian MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED NEW YORK, New York, 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

MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
SEC 8-7221

Filing source

Form ADV 2080947 · Mar 30, 2026 · Schedule D 7.B.(1), fund 805-8565174630

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

Related funds

Funds whose names form a numbered series with this one and that share its city or the name of a related person. Form D does not state how these funds are related.

Fund	Latest Form D	Reported sold	Investors
Yorktown Energy Partners IX, L.P. (this fund)	Oct 20, 2010	$1,227,500,000	105
Yorktown Energy Partners X, L.P.	May 28, 2013	$1,600,000	148
Yorktown Energy Partners XI, L.P.	Mar 2, 2016	Yet to sell	0
Yorktown Energy Partners XII, L.P.	Oct 15, 2019	$239,836,842	84

People & organizations

Current and past Form D appearances. These existing records do not establish a person's current role or uniquely identify them across issuers.

People and organizations reported in Form D filings
Name	Reported role
W. Howard Keenan	Director
Tomas La Costa	Director
Bryan H. Lawrence	Director
Peter A. Leidel	Director
Robert A. Signorino	Director

Issuer details

Industry: Pooled Investment Fund (See others in industry)

Address:

410 Park Avenue 19 Th Floor
New York, NY, 10022