Form D · Other Investment Fund

AMG Pantheon Master Fund, LLC

Stamford, CT · CIK 0001609212

Offering snapshot reported Jan 9, 2026 · SEC filing

Reported sold
$5.14B
Indefinite offering
Investors reported
3
Form D · investor count
Minimum accepted
$0
Reported outside-investor minimum
First sale
Jan 1, 2016
As reported in this filing

Fundraising history

Reported sold
Reported amount sold by Form D filing date$0$2.57B$5.14BJan 6, 2016: $30,000,000.00Jan 6, 2016Jan 6, 2017: $50,000,000.00Jan 4, 2019: $92,620,714.00Jan 6, 2020: $143,782,457.00Jan 6, 2021: $253,602,243.00Nov 3, 2021: $580,294,466.00Jan 11, 2022: $699,589,691.00Jan 10, 2023: $1,313,645,806.00Jan 10, 2024: $2,328,056,422.00Jan 10, 2025: $3,727,574,707.00Jan 9, 2026: $5,136,148,282.00Jan 9, 2026

Dates are filing dates, not cash receipt dates. Decreases are reported revisions, not evidence of withdrawals. Separate offering histories are not added together.

What changed?

Latest filing versus its linked predecessor, where available.

  • Reported sold$3,727,574,707 → $5,136,148,282

Filing history

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FiledFiling typeReported soldChange vs linked filingInvestorsSource
Jan 9, 2026Amendment$5,136,148,282$1,408,573,575vs Jan 10, 20253SEC filing
Jan 10, 2025Amendment$3,727,574,707$1,399,518,285vs Jan 10, 20243SEC filing
Jan 10, 2024Amendment$2,328,056,422$1,014,410,616vs Jan 10, 20233SEC filing
Jan 10, 2023Amendment$1,313,645,806$614,056,115vs Jan 11, 20223SEC filing
Jan 11, 2022Amendment$699,589,691$445,987,448vs Jan 6, 20213SEC filing
Nov 3, 2021Amendment$580,294,466$326,692,223vs Jan 6, 20213SEC filing
Jan 6, 2021Amendment$253,602,243$109,819,786vs Jan 6, 20203SEC filing
Jan 6, 2020Amendment$143,782,457$51,161,743vs Jan 4, 20193SEC filing
Jan 4, 2019Amendment$92,620,714$42,620,714vs Jan 6, 20173SEC filing
Jan 6, 2017Amendment$50,000,000$20,000,000vs Jan 6, 20161SEC filing
Jan 6, 2016Initial$30,000,000No comparison1SEC filing

Offering details

Securities
Pooled investment fund
Exemptions
06b
Duration over one year
Yes
Business combination
No
Sales commissions
$0
Finders' fees
$0
Form D file number
021-254625

Sales compensation recipients

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RecipientCRDAssociated broker-dealer
AMG DISTRIBUTORS, INC.27314
PANTHEON SECURITIES, LLC285480

Source: Form D, filed Jan 9, 2026. Minimum accepted may differ from a standard advertised minimum.

Fund connections

No confirmed ADV fund connection is available for this issuer.

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
NameReported role
John Ball Executive
Christine C. Carsman Executive
Jeffrey T. Cerutti Executive
Sheldon Chang Executive
Gerald F. Dillenburg Executive
Thomas Disbrow Executive
Mark J. Duggan Executive
Susan Giacin Executive
Kurt Keilhacker Director
Douglas A. Keller Executive
Keitha L. Kinne Executive
Susan Long Mcandrews Executive
Jeff Miller Executive
Leslie J. Osborn Executive
Eric Rakowski Director
Hector D. Roman Executive
Donald S. Rumery Executive
Victoria Sassine Director
Patrick J. Spellman Executive
John A. Starace Executive
Christopher R. Townsend Executive
Garret W. Weston Director

Issuer details

Industry: Pooled Investment Fund (See others in industry)

Address:
680 Washington Boulevard, Suite 500
Stamford, CT, 06901