As of November 6, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Diameter Credit Co. The largest reported stake is APO Corp.'s, at 20.4%. 5 filings are on record since August 8, 2025 (Schedule 13D/A, September 19, 2025).
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Key facts
- · Reporting person: ICONIQ Capital, LLC · Sole voting: 3,003,806 · Shared voting: 0 · Sole dispositive: 3,003,806 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-02-17
- · Reporting person: BTGP Boreas Fund LP - Series A · Sole voting: 0 · Shared voting: 2,971,799 · Sole dispositive: 0 · Shared dispositive: 2,971,799 · SCHEDULE 13G/A, 2026-02-13
- · Reporting person: APO Corp. · Sole voting: 0 · Shared voting: 8,547,379 · Sole dispositive: 0 · Shared dispositive: 8,547,379 · SCHEDULE 13D/A, 2025-09-19
- · Holder: ICONIQ Capital, LLC · Percent: 6.1% · SCHEDULE 13G/A
- · Holder: BTGP Boreas Fund LP - Series A · Percent: 5.9% · SCHEDULE 13G/A
Diameter Credit Co has 5 Schedule 13D or 13G filings on record since 2025-08-08. 3 holders' latest filing reports 5% or more of common shares, $0.001 par value per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| APO Corp. | 20.4% | 8,547,379 | SCHEDULE 13D/A, 2025-09-19 | 2025-09-17 |
| ICONIQ Capital, LLC | 5.9% | 3,003,806 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
| BTGP Boreas Fund LP - Series A | 5.8% | 2,971,799 | SCHEDULE 13G/A, 2026-02-13 | 2025-12-31 |
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More on Diameter Credit Co and the records around it.
Diameter Credit Co elsewhere on the record
- Leadership changes Jul 2026
Companies that share a holder
- APO Corp. also filed stake reports on 1 other company: Apollo S3 Private Markets Fund (Jul 2026)
- ICONIQ Capital, LLC also filed stake reports on 1 other company: LibreMax Asset-Backed Income Fund (May 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| APO Corp. | 0 | 8,547,379 | 0 | 8,547,379 | SCHEDULE 13D/A, 2025-09-19 |
| AP DLF Offshore Investor, L.P. | 0 | 8,547,379 | 0 | 8,547,379 | SCHEDULE 13D/A, 2025-09-19 |
| Apollo Principal Holdings B, L.P. | 0 | 8,547,379 | 0 | 8,547,379 | SCHEDULE 13D/A, 2025-09-19 |
| Apollo Principal Holdings B GP, LLC | 0 | 8,547,379 | 0 | 8,547,379 | SCHEDULE 13D/A, 2025-09-19 |
| ICONIQ Capital, LLC | 3,003,806 | 0 | 3,003,806 | 0 | SCHEDULE 13G/A, 2026-02-17 |
| ICONIQ Capital Group, L.P. | 3,003,806 | 0 | 3,003,806 | 0 | SCHEDULE 13G/A, 2026-02-17 |
| ICONIQ Capital Group GP, LLC | 3,003,806 | 0 | 3,003,806 | 0 | SCHEDULE 13G/A, 2026-02-17 |
| Makan Divesh | 3,003,806 | 0 | 3,003,806 | 0 | SCHEDULE 13G/A, 2026-02-17 |
| BTGP Boreas Fund LP - Series A | 0 | 2,971,799 | 0 | 2,971,799 | SCHEDULE 13G/A, 2026-02-13 |
| BTG Pactual Prop GP, Ltd. | 0 | 2,971,799 | 0 | 2,971,799 | SCHEDULE 13G/A, 2026-02-13 |
| Banco BTG Pactual S.A. | 0 | 2,971,799 | 0 | 2,971,799 | SCHEDULE 13G/A, 2026-02-13 |
| BTG Pactual Holding S.A. | 0 | 2,971,799 | 0 | 2,971,799 | SCHEDULE 13G/A, 2026-02-13 |
| BTG Pactual G7 Holding S.A. | 0 | 2,971,799 | 0 | 2,971,799 | SCHEDULE 13G/A, 2026-02-13 |
The latest filing names Diameter Credit Co, with its principal executive office as 50 Hudson Yards, 66th Floor, New York, NY 10001 (SCHEDULE 13G/A, 2026-02-17).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-08 | BTGP Boreas Fund LP - Series A | 5.9% | SCHEDULE 13G/A |
| 2025-08-13 | ICONIQ Capital, LLC | 6.1% | SCHEDULE 13G/A |
| 2025-09-19 | APO Corp. | 20.4% | SCHEDULE 13D/A |
| 2026-02-13 | BTGP Boreas Fund LP - Series A | 5.8% | SCHEDULE 13G/A |
| 2026-02-17 | ICONIQ Capital, LLC | 5.9% | SCHEDULE 13G/A |
Questions about who owns Diameter Credit Co
Who owns Diameter Credit Co?
On this page, 3 holders' latest ownership filings report 5% or more of Diameter Credit Co: APO Corp. (20.4%, Schedule 13D/A, filed 2025-09-19), ICONIQ Capital, LLC (5.9%, Schedule 13G/A, filed 2026-02-17) and BTGP Boreas Fund LP - Series A (5.8%, Schedule 13G/A, filed 2026-02-13).
Who are the largest shareholders of Diameter Credit Co?
By the share each holder's latest filing reports, the largest holders of Diameter Credit Co on this page are APO Corp. (20.4%), ICONIQ Capital, LLC (5.9%) and BTGP Boreas Fund LP - Series A (5.8%).
When did APO Corp. buy into Diameter Credit Co?
The filings give report dates, not purchase dates. The earliest filing from APO Corp. on this page is the Schedule 13D/A, filed 2025-09-19, reporting 20.4%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 5 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Diameter Credit Co
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| July 31, 2026 | Leadership change: Daniel Kasell departs, and 1 more | — | Leadership changes | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.