Who owns Abpro Holdings (ABPO)
Which tracked institutional funds hold ABPO, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ABPO company fundamentals →
Ownership as of the 2025-Q4 13F filings (latest filed 2026-02-23). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on ABPO is one-sided between 2025-Q3 and 2025-Q4: 0 added or opened and 1 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
ABPO’s largest tracked holder by dollar value, Yorkville Advisors Global, LP, sizes it at 0.2% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.2pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ABPO divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q3 and 2025-Q4, across 32 tracked filers holding ABPO, 5 increased or opened the position and 21 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in ABPO between the 2025-Q3 and 2025-Q4 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
Largest trims
- TENOR CAPITAL MANAGEMENT Co., L.P.$5M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| VANGUARD GROUP INC trimmed | 20,084 | $85K | 14.3% | 2025-Q4 |
| GOLDMAN SACHS GROUP INC trimmed | 12,383 | $52K | 8.8% | 2025-Q4 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 10,785 | $46K | 7.7% | 2025-Q4 |
| Saba Capital Management, L.P. | 997,048 | $16K | 2.8% | 2025-Q4 |
| MMCAP International Inc. SPC | 675,000 | $11K | 1.9% | 2025-Q4 |
| Calamos Advisors LLC | 625,000 | $11K | 1.8% | 2025-Q4 |
| AQR Arbitrage LLC trimmed | 546,540 | $9K | 1.5% | 2025-Q4 |
| Linden Advisors LP | 499,999 | $8K | 1.4% | 2025-Q4 |
| WOLVERINE ASSET MANAGEMENT LLC added | 472,720 | $8K | 1.3% | 2025-Q4 |
| Polar Asset Management Partners Inc. added | 378,328 | $6K | 1.1% | 2025-Q4 |
| Sandia Investment Management LP | 358,427 | $6K | 1.0% | 2025-Q4 |
| D. E. Shaw & Co., Inc. | 375,000 | $5K | 0.9% | 2025-Q4 |
| ARISTEIA CAPITAL, L.L.C. | 273,125 | $5K | 0.8% | 2025-Q4 |
| TORONTO DOMINION BANK | 273,798 | $4K | 0.7% | 2025-Q4 |
| Davidson Kempner Capital Management LP new | 250,000 | $4K | 0.7% | 2025-Q4 |
| Verition Fund Management LLC | 225,000 | $4K | 0.6% | 2025-Q4 |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 200,000 | $3K | 0.6% | 2025-Q4 |
| LMR Partners LLP added | 125,000 | $2K | 0.3% | 2025-Q4 |
| PICTON MAHONEY ASSET MANAGEMENT | 125,000 | $2K | 0.3% | 2025-Q4 |
| Clear Street Group Inc. trimmed | 436 | $2K | 0.3% | 2025-Q4 |
| Tower Research Capital LLC (TRC) trimmed | 436 | $2K | 0.3% | 2025-Q4 |
| Diametric Capital, LP | 358,427 | $1K | 0.2% | 2026-Q1 (1 quarter ahead of as-of) |
| Virtu Financial LLC trimmed | 40,488 | $1K | 0.2% | 2025-Q4 |
| Sculptor Capital LP | 34,101 | $580 | 0.1% | 2025-Q4 |
| OMERS ADMINISTRATION Corp | 25,000 | $425 | 0.1% | 2025-Q4 |
| TWO SIGMA SECURITIES, LLC trimmed | 16,227 | $266 | 0.0% | 2025-Q4 |
| METEORA CAPITAL, LLC trimmed | 8,154 | $134 | 0.0% | 2025-Q4 |
| BANK OF AMERICA CORP /DE/ trimmed | 15 | $64 | 0.0% | 2025-Q4 |
| MIZUHO SECURITIES USA LLC new | 11,386 | $23 | 0.0% | 2026-Q1 (1 quarter ahead of as-of) |
| SBI Securities Co., Ltd. trimmed | 5 | $21 | 0.0% | 2025-Q4 |
| BARCLAYS PLC | 8,333 | $17 | 0.0% | 2026-Q1 (1 quarter ahead of as-of) |
| UBS Group AG trimmed | 336 | $5 | 0.0% | 2025-Q4 |
| FLOW TRADERS U.S. LLC | 51,588 | — | 0.0% | 2026-Q1 (1 quarter ahead of as-of) |
| Yorkville Advisors Global, LP new | 858,333 | $192K | 32.4% | 2025-Q3 stale (1 quarter behind) |
| XTX Topco Ltd new | 88,631 | $20K | 3.3% | 2025-Q3 stale (1 quarter behind) |
| Atlas Merchant Capital LLC | 87,500 | $20K | 3.3% | 2025-Q3 stale (1 quarter behind) |
| CITIGROUP INC new | 80,251 | $18K | 3.0% | 2025-Q3 stale (1 quarter behind) |
| JANE STREET GROUP, LLC trimmed | 59,196 | $13K | 2.2% | 2025-Q3 stale (1 quarter behind) |
| O'ROURKE & COMPANY, Inc | 49,300 | $11K | 1.9% | 2025-Q3 stale (1 quarter behind) |
| CLEAR STREET LLC added | 377,185 | $8K | 1.3% | 2025-Q2 stale (2 quarters behind) |
| CANTOR FITZGERALD, L. P. trimmed | 375,000 | $8K | 1.3% | 2025-Q2 stale (2 quarters behind) |
| NORTHERN TRUST CORP | 21,550 | $5K | 0.8% | 2025-Q3 stale (1 quarter behind) |
| Cubist Systematic Strategies, LLC new | 10,191 | $2K | 0.4% | 2025-Q2 stale (2 quarters behind) |
| Physician Wealth Advisors, Inc. new | 3,893 | $873 | 0.1% | 2025-Q3 stale (1 quarter behind) |
| RIVERNORTH CAPITAL MANAGEMENT, LLC trimmed | 24,477 | $426 | 0.1% | 2025-Q2 stale (2 quarters behind) |
| HRT FINANCIAL LP new | 14,406 | — | 0.0% | 2025-Q2 stale (2 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (2 quarters behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.