Apollo Principal Holdings B, L.P. - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Apollo Principal Holdings B, L.P. is an investment firm tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days. Lifetime open-market purchases: $235.29M.
Profile
Apollo Principal Holdings B, L.P. is an investment firm that reports beneficial ownership of shares in Apollo S3 Private Markets Fund and 1 other company under U.S. securities law. It has submitted 19 SEC insider filings since 2024, most recently in May 2026.
| Filer type | Fund |
|---|---|
| Role | 10% Owner |
| Notability | 20/100 |
Board memberships
- Apollo S3 Private Markets Fund
- Diameter Credit Co
Reported roles
- 10% Owner
Trading Pattern
InsiderAlpha's records for Apollo Principal Holdings B, L.P. go back to 2024: 12 primary Form 4 filings, an average of 4.0 per year. The typical open-market purchase is $26.14M (9 buys totaling $235.29M). No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-31 | - | Apollo S3 Private Markets Fund | J - Other acquisition / disposition | 5.1K | $0.00 | |
| 2026-07-31 | - | Apollo S3 Private Markets Fund | J - Other acquisition / disposition | 23.7K | $0.00 | |
| 2026-05-01 | - | Apollo S3 Private Markets Fund | J - Other acquisition / disposition | 5.1K | $0.00 | |
| 2026-05-01 | - | Apollo S3 Private Markets Fund | J - Other acquisition / disposition | 23.6K | $0.00 | |
| 2026-03-04 | - | Diameter Credit Co | P - Open-market purchase | 625.8K | $27.96 | $17.50M |
| 2026-01-30 | - | Apollo S3 Private Markets Fund | J - Other acquisition / disposition | 5.1K | $0.00 | |
| 2026-01-30 | - | Apollo S3 Private Markets Fund | J - Other acquisition / disposition | 23.6K | $0.00 | |
| 2025-11-18 | - | Diameter Credit Co | P - Open-market purchase | 1.01M | $27.63 | $28.00M |
| 2025-11-03 | - | Apollo S3 Private Markets Fund | J - Other acquisition / disposition | 5.0K | $0.00 | |
| 2025-11-03 | - | Apollo S3 Private Markets Fund | J - Other acquisition / disposition | 23.5K | $0.00 | |
| 2025-10-22 | - | Diameter Credit Co | P - Open-market purchase | 894.4K | $27.39 | $24.50M |
| 2025-09-17 | - | Diameter Credit Co | P - Open-market purchase | 884.0K | $27.72 | $24.50M |
| 2025-07-28 | - | Diameter Credit Co | P - Open-market purchase | 768.7K | $27.32 | $21.00M |
| 2024-12-18 | - | Diameter Credit Co | P - Open-market purchase | 778.1K | $26.99 | $21.00M |
| 2024-11-14 | - | Diameter Credit Co | P - Open-market purchase | 687.6K | $26.72 | $18.37M |
| 2024-10-16 | - | Apollo S3 Private Markets Fund | P - Open-market purchase | 2.00M | $25.00 | $49.90M |
| 2024-10-16 | - | Apollo S3 Private Markets Fund | P - Open-market purchase | 1.22M | $25.00 | $30.51M |
Most Active Insiders Right Now
Apollo Principal Holdings B, L.P. has no recent co-filers at the same companies, so here are the insiders with the largest open-market activity across the market in the last 90 days.
- MetLife Investment Management, LLC - $1600000.00B of FINS open-market activity in the last 90 days
- Magnetar Financial LLC - $16357.48B of CRWV open-market activity in the last 90 days
- Marianne Okland - $18.46B of STNG open-market activity in the last 90 days
- VisionWave Holdings, Inc. - $14.13B of SVRE open-market activity in the last 90 days
- Vanessa Allen Sutherland - $7.44B of PSX open-market activity in the last 90 days
- AI Alpine (Luxembourg) S.a.r.l. - $2.69B of INIO open-market activity in the last 90 days
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- ARCH Venture Partners XII, LLC
- ARCH Venture Partners XIII, LLC
- Audax Private Credit Business, LP
- Milton C. Ault III
- BAIN CAPITAL INVESTORS LLC
- Bain Capital Life Sciences Investors, LLC
- BAKER BROS. ADVISORS LP
- BANK OF AMERICA CORP /DE/
Frequently Asked Questions
What is Apollo Principal Holdings B, L.P.?
Apollo Principal Holdings B, L.P. is an investment firm that reports beneficial ownership of shares in Apollo S3 Private Markets Fund and 1 other company under U.S. securities law. It has submitted 19 SEC insider filings since 2024, most recently in May 2026.…
Has Apollo Principal Holdings B, L.P. been buying or selling stock?
Recorded transactions: 9 open-market purchases ($235.29M) and 0 open-market sales across all tracked filings.
Where can I see all of Apollo Principal Holdings B, L.P.'s SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live Apollo Principal Holdings B, L.P. profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.