Oaktree Acquisition Corp. III Life Sciences
Oaktree Acquisition Corp. III Life Sciences (OACC) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · OACC · as of Sep 30, 2025
Ownership Breakdown
49
Institutional Holders
▲ 1 vs Q2
$175.08M
Total Inst. Value
▲ $2.63M vs Q2
24.58M
Shares Outstanding
freeFloat 100.00%
16.68M
13F Shares Held
▲ 199,049 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
OACC largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
AQR ARBITRAGE LLC blank checks | 1.41M | 5.75% | 5.75% | $14.79B | Nov 14, 2025 | ▼ 38.0K |
TORONTO DOMINION BANK blank checks | 934.0K | 3.80% | 3.80% | $9.82B | Nov 14, 2025 | ▲ 179.0K |
D. E. SHAW & CO., INC. blank checks | 861.6K | 3.50% | 3.50% | $9.02B | Nov 14, 2025 | — held |
BOUSSARD & GAVAUDAN INVESTMENT MANAGEMENT LLP blank checks | 750.0K | 3.05% | 3.05% | $7.89B | Nov 12, 2025 | — held |
EMPYREAN CAPITAL PARTNERS, LP blank checks | 750.0K | 3.05% | 3.05% | $7.88B | Nov 14, 2025 | NEW |
DRIEHAUS CAPITAL MANAGEMENT LLC blank checks | 712.9K | 2.90% | 2.90% | $7.46B | Nov 14, 2025 | ▼ 44.3K |
HIGHTOWER ADVISORS, LLC blank checks | 657.6K | 2.68% | 2.68% | $6.91B | Nov 7, 2025 | ▼ 29.1K |
DECAGON ASSET MANAGEMENT LLP blank checks | 644.3K | 2.62% | 2.62% | $6.77B | Nov 14, 2025 | ▲ 26.3K |
LINDEN ADVISORS LP blank checks | 600.0K | 2.44% | 2.44% | $6.28B | Nov 14, 2025 | — held |
GOLDMAN SACHS GROUP INC blank checks | 529.5K | 2.15% | 2.15% | $5.57B | Nov 14, 2025 | — held |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
10
Increased
+1.06M shares6
New Positions
first time holders9
Decreased
−800.1K shares1
Sold Out
fully exitedNet shares change (top 50)
+263.4K
+1.06M / −800.1K
Net new holders
+6
6 new / 1 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
OACC insider trading · insider activity
Source: SEC Form 4
0
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Oaktree Acquisition Holdings III LS, LLC 10 percent owner | Oct 30, 2024 | J-Other | 231,492 | — | — | 4.80M | Form 4 ↗ |
Oaktree Acquisition Holdings III LS, LLC 10 percent owner | Oct 30, 2024 | C-Conversion | 33,981 | $10.00 | $339.8K | 584.0K | Form 4 ↗ |
Oaktree Acquisition Holdings III LS, LLC 10 percent owner | Oct 30, 2024 | C-Conversion | 6,796 | — | — | 116.8K | Form 4 ↗ |
Oaktree Acquisition Holdings III LS, LLC 10 percent owner | Oct 30, 2024 | C-Conversion | 33,981 | — | — | 0 | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Oaktree Acquisition Corp. III Life Sciences (OACC) is primarily owned by institutional investors, who hold approximately 67.8% of total shares outstanding. Company insiders own approximately 0.00%, while retail and public investors account for the remaining 32.15%.
The largest institutional shareholder of Oaktree Acquisition Corp. III Life Sciences is AQR ARBITRAGE LLC, holding approximately 1.41 million shares — equal to 5.75% of outstanding shares — as of September 30, 2025.
A total of 49 institutional investors currently hold OACC stock, with a combined institutional value of approximately $175,078,843 as of the most recent 13F filing period.
Frequently asked questions
OACC ownershipOaktree Acquisition Corp. III Life Sciences (OACC) is primarily owned by institutional investors, who hold approximately 67.8% of shares. The largest shareholder is AQR ARBITRAGE LLC with a 5.75% stake. Company insiders hold 0.00%. Data sourced from SEC Form 13F as of September 30, 2025.