Who owns Oaktree Acquisition Corp. III Life Sciences (OACC)
Which tracked institutional funds hold OACC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See OACC company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-08-19). 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
7 tracked funds added or opened OACC while 8 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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
OACC’s largest tracked holder by dollar value, AQR Arbitrage LLC, 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 OACC 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 2026-Q1 and 2026-Q2, across 44 tracked filers holding OACC, 11 increased or opened the position and 12 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 OACC between the 2026-Q1 and 2026-Q2 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.
New buyers 1
- BOUSSARD & GAVAUDAN GESTION SAS$8M
Full exits 6
- Decagon Asset Management LLP$11M
- Boussard & Gavaudan Investment Management LLP$8M
- HighTower Advisors, LLC$5M
- GLAZER CAPITAL, LLC$4M
- TENOR CAPITAL MANAGEMENT Co., L.P.$3M
- METEORA CAPITAL, LLC$2M
Largest adds
- K2 PRINCIPAL FUND, L.P.$2M
- Verition Fund Management LLC$2M
- Fort Baker Capital Management LP$1M
- TORONTO DOMINION BANK$676K
- Schonfeld Strategic Advisors LLC$380K
- DLD Asset Management, LP$323K
Largest trims
- Shaolin Capital Management LLC$1M
- UBS Group AG$742K
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 |
|---|---|---|---|---|
| AQR Arbitrage LLC | 1,324,175 | $14M | 7.0% | 2026-Q2 |
| Fort Baker Capital Management LP added | 1,105,394 | $12M | 5.9% | 2026-Q2 |
| Empyrean Capital Partners, LP | 900,000 | $10M | 4.8% | 2026-Q2 |
| D. E. Shaw & Co., Inc. | 861,625 | $9M | 4.6% | 2026-Q2 |
| BOUSSARD & GAVAUDAN GESTION SAS new | 720,000 | $8M | 3.8% | 2026-Q2 |
| Linden Advisors LP | 600,000 | $6M | 3.2% | 2026-Q2 |
| TORONTO DOMINION BANK added | 554,294 | $6M | 2.9% | 2026-Q2 |
| Sculptor Capital LP | 530,807 | $6M | 2.8% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC | 529,535 | $6M | 2.8% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP | 525,000 | $6M | 2.8% | 2026-Q2 |
| LMR Partners LLP | 510,900 | $5M | 2.7% | 2026-Q2 |
| Alberta Investment Management Corp | 500,000 | $5M | 2.6% | 2026-Q2 |
| Verition Fund Management LLC added | 470,342 | $5M | 2.5% | 2026-Q2 |
| Ghisallo Capital Management LLC | 450,000 | $5M | 2.4% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 450,000 | $5M | 2.4% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP | 437,500 | $5M | 2.3% | 2026-Q2 |
| GRITSTONE ASSET MANAGEMENT LLC | 394,908 | $4M | 2.1% | 2026-Q2 |
| Radcliffe Capital Management, L.P. added | 387,222 | $4M | 2.0% | 2026-Q2 |
| K2 PRINCIPAL FUND, L.P. added | 365,900 | $4M | 1.9% | 2026-Q2 |
| Periscope Capital Inc. | 323,400 | $3M | 1.7% | 2026-Q2 |
| O'Connor Alternative Investments LLC | 300,000 | $3M | 1.6% | 2026-Q2 |
| Hudson Bay Capital Management LP | 300,000 | $3M | 1.6% | 2026-Q2 |
| Governors Lane LP | 300,000 | $3M | 1.6% | 2026-Q2 |
| WHITEBOX ADVISORS LLC | 250,000 | $3M | 1.3% | 2026-Q2 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 250,000 | $3M | 1.3% | 2026-Q2 |
| Lineage Point Capital LP added | 232,945 | $2M | 1.2% | 2026-Q2 |
| BERKLEY W R CORP | 223,645 | $2M | 1.2% | 2026-Q2 |
| Shaolin Capital Management LLC trimmed | 200,547 | $2M | 1.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC | 175,000 | $2M | 0.9% | 2026-Q2 |
| DLD Asset Management, LP added | 165,435 | $2M | 0.9% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 144,677 | $2M | 0.8% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS | 81,520 | $873K | 0.4% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT | 75,000 | $802K | 0.4% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 49,932 | $535K | 0.3% | 2026-Q2 |
| CITIGROUP INC | 45,000 | $482K | 0.2% | 2026-Q2 |
| Rangeley Capital, LLC trimmed | 40,239 | $431K | 0.2% | 2026-Q2 |
| READYSTATE ASSET MANAGEMENT LP | 25,000 | $268K | 0.1% | 2026-Q2 |
| MIZUHO SECURITIES USA LLC | 25,000 | $264K | 0.1% | 2026-Q2 |
| Clear Street Group Inc. | 21,000 | $225K | 0.1% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC | 15,243 | $163K | 0.1% | 2026-Q2 |
| Bulldog Investors, LLP | 13,500 | $144K | 0.1% | 2026-Q2 |
| Warberg Asset Management LLC added | 10,037 | $107K | 0.1% | 2026-Q2 |
| UBS Group AG trimmed | 1,580 | $17K | 0.0% | 2026-Q2 |
| MORGAN STANLEY trimmed | 57 | $610 | 0.0% | 2026-Q2 |
| Decagon Asset Management LLP added | 1,002,427 | $11M | 5.2% | 2026-Q1 stale (1 quarter behind) |
| HighTower Advisors, LLC trimmed | 510,836 | $5M | 2.7% | 2026-Q1 stale (1 quarter behind) |
| GLAZER CAPITAL, LLC trimmed | 357,922 | $4M | 1.9% | 2026-Q1 stale (1 quarter behind) |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 300,000 | $3M | 1.6% | 2026-Q1 stale (1 quarter behind) |
| METEORA CAPITAL, LLC trimmed | 182,093 | $2M | 1.0% | 2026-Q1 stale (1 quarter behind) |
| Kepos Capital LP | 15,000 | $159K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| CITADEL ADVISORS LLC trimmed | 10,253 | $109K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Driehaus Capital Management LLC trimmed | 670,072 | $7M | 3.5% | 2025-Q4 stale (2 quarters behind) |
| Centiva Capital, LP | 40,400 | $429K | 0.2% | 2025-Q4 stale (2 quarters behind) |
| Lighthouse Investment Partners, LLC added | 850,000 | $9M | 4.4% | 2025-Q2 stale (4 quarters behind) |
| Virtu Financial LLC added | 47,048 | $493K | 0.2% | 2025-Q2 stale (4 quarters behind) |
| FIFTH LANE CAPITAL, LP new | 34,000 | $356K | 0.2% | 2025-Q2 stale (4 quarters behind) |
| CLEAR STREET LLC added | 22,000 | $230K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| BARDIN HILL MANAGEMENT PARTNERS LP new | 12,305 | $129K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
2 parent filings withheld from the table above, and from the coverage figures, to avoid listing one book twice: Boussard & Gavaudan Investment Management LLP (last filed 2026-Q1, 720,000 shares) reconciles to its 1 current affiliate (720,000 shares) — 0.000% apart; OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) (last filed 2025-Q4, 300,000 shares) reconciles to its 1 current affiliate (300,000 shares) — 0.000% apart.
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.