Oscar Health, Inc. (OSCR) Ownership
OSCR ownership summary
as of October 18, 2026- Institutions
- 73.9% of shares outstanding
- Insiders
- 5.16% of shares outstanding
- Shares outstanding
- 273.5M
- Float
- 263.6M shares available to trade
- Short interest
- 6.51% 16.5M shares short
- Days to cover
- 3.02 short interest up 0.5% vs prior month
- Institutions 73.89%
- Insiders 5.16%
- Other investors 20.95%
OSCR top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 6.67% | 20.6M | $656.5M | +3.3M (+18.9%) | June 30, 2026 |
| 2 | T. Rowe Price Investment Management,Inc. | 4.22% | 13.0M | $415.7M | +1.4M (+11.9%) | June 30, 2026 |
| 3 | D. E. Shaw & Co LP | 4.10% | 12.6M | $403.2M | +7.2M (+130.5%) | June 30, 2026 |
| 4 | Vanguard Portfolio Management, LLC | 3.57% | 11.0M | $351.7M | +483,576 (+4.6%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 3.43% | 10.6M | $337.4M | −198,190 (−1.8%) | June 30, 2026 |
| 6 | American Century Companies Inc | 2.93% | 9.1M | $288.8M | +2.0M (+28.8%) | June 30, 2026 |
| 7 | Jane Street Group LLC | 2.06% | 6.4M | $203.0M | +3.5M (+119.2%) | June 30, 2026 |
| 8 | Thrive Capital Management, LLC(NY) | 2.06% | 6.3M | $202.3M | — | June 30, 2026 |
| 9 | Geode Capital Management, LLC | 1.89% | 5.8M | $185.6M | +786,931 (+15.6%) | June 30, 2026 |
| 10 | State Street Corp | 1.88% | 5.8M | $185.0M | +538,979 (+10.2%) | June 30, 2026 |
| 11 | FMR Inc | 1.62% | 5.0M | $159.4M | +3.8M (+317.0%) | June 30, 2026 |
| 12 | Citadel Advisors Llc | 1.37% | 4.2M | $134.9M | +763,190 (+22.0%) | June 30, 2026 |
| 13 | Two Sigma Investments LLC | 1.31% | 4.0M | $128.7M | +1.7M (+71.8%) | June 30, 2026 |
| 14 | Dimensional Fund Advisors, Inc. | 1.16% | 3.6M | $113.9M | −621,046 (−14.8%) | June 30, 2026 |
| 15 | Renaissance Technologies Corp | 1.06% | 3.3M | $104.7M | +3.3M (0.0%) | June 30, 2026 |
| 16 | T. Rowe Price Associates, Inc. | 1.05% | 3.3M | $103.8M | +1.3M (+70.1%) | June 30, 2026 |
| 17 | Jacobs Levy Equity Management, Inc. | 0.98% | 3.0M | $96.5M | +550,893 (+22.3%) | June 30, 2026 |
| 18 | Glynn Capital Management, LLC | 0.83% | 2.6M | $82.1M | −15,964 (−0.6%) | June 30, 2026 |
| 19 | Assenagon Asset Management SA | 0.81% | 2.5M | $79.6M | +1.3M (+103.3%) | June 30, 2026 |
| 20 | The Goldman Sachs Group Inc | 0.74% | 2.3M | $73.0M | +817,803 (+55.6%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 16 holders added 32.6M shares and 3 cut 835K.
OSCR top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.47% | 7.6M | $242.8M | −8,843 (−0.1%) | August 31, 2026 |
| 2 | iShares Russell 2000 ETF | 2.04% | 6.3M | $200.4M | −42,653 (−0.7%) | September 30, 2026 |
| 3 | Avantis US Small Cap Value ETF | 1.93% | 5.9M | $189.6M | — | September 30, 2026 |
| 4 | Vanguard Small Cap Index | 1.78% | 5.5M | $175.6M | +3,912 (+0.1%) | August 31, 2026 |
| 5 | Vanguard MStar Small Cap Growth Indx Inv | 1.02% | 3.2M | $100.8M | −24,314 (−0.8%) | August 31, 2026 |
| 6 | T. Rowe Price Small-Cap Stock | 0.97% | 3.0M | $95.0M | +100,216 (+3.5%) | August 31, 2026 |
| 7 | Fidelity Small Cap Index | 0.85% | 2.6M | $84.0M | +22,143 (+0.8%) | July 31, 2026 |
| 8 | Fidelity Small Cap Growth | 0.75% | 2.3M | $74.0M | +652,990 (+39.1%) | July 31, 2026 |
| 9 | iShares Russell 2000 Growth ETF | 0.73% | 2.3M | $71.9M | −2,855 (−0.1%) | September 30, 2026 |
| 10 | BIT Global Technology Leaders R-I | 0.67% | 2.1M | $66.4M | −485,314 (−18.9%) | July 31, 2026 |
| 11 | T. Rowe Price US Smlr Coms Eq A | 0.65% | 2.0M | $63.6M | +131,213 (+7.0%) | August 31, 2026 |
| 12 | T. Rowe Price Small-Cap Value | 0.62% | 1.9M | $60.8M | −82,737 (−4.2%) | August 31, 2026 |
| 13 | T. Rowe Price Instl Small-Cap Stock | 0.53% | 1.6M | $51.7M | +69,237 (+4.5%) | August 31, 2026 |
| 14 | Fidelity Enhanced Small Cap Core ETF | 0.50% | 1.6M | $49.5M | +3,255 (+0.2%) | September 30, 2026 |
| 15 | Avantis US Large Cap Value ETF | 0.47% | 1.4M | $45.8M | +4,536 (+0.3%) | September 30, 2026 |
| 16 | Vanguard Russell 2000 ETF | 0.45% | 1.4M | $44.2M | +32,753 (+2.4%) | August 31, 2026 |
| 17 | Schwab US Small-Cap ETF™ | 0.43% | 1.3M | $42.7M | +900 (+0.1%) | September 30, 2026 |
| 18 | Fidelity Small Cap Growth K6 | 0.39% | 1.2M | $38.6M | +350,720 (+40.7%) | July 31, 2026 |
| 19 | Fidelity Extended Market Index | 0.35% | 1.1M | $34.3M | −10,271 (−0.9%) | August 31, 2026 |
| 20 | T. Rowe Price Integrated US Sm Gr Eq | 0.34% | 1.1M | $34.0M | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
OSCR insider transactions
latest 11| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-06 | Mark T Bertolini | Buy | $11.92 | 1,000,000 | $11.9M |
| 2026-01-08 | Mario Schlosser | Sell | $17.65 | 23,038 | $406,621 |
| 2026-01-06 | Mario Schlosser | Sell | $17.01 | 76,962 | $1.3M |
| 2025-12-24 | Mario Schlosser | Sell | $15.00 | 38,835 | $582,525 |
| 2025-12-02 | Adam Mcananey | Sell | $16.59 | 1,852 | $30,725 |
| 2025-12-02 | Janet Liang | Sell | $16.59 | 7,338 | $121,737 |
| 2025-12-02 | Mario Schlosser | Sell | $16.59 | 23,965 | $397,579 |
| 2025-12-02 | Richard Scott Blackley | Sell | $16.59 | 25,135 | $416,990 |
| 2025-11-11 | Mario Schlosser | Sell | $15.27 | 286,182 | $4.4M |
| 2025-09-22 | Mario Schlosser | Sell | $18.43 | 395,000 | $7.3M |
| 2025-05-12 | Elbert O Jr. Robinson | Sell | $16.43 | 25,000 | $410,750 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
OSCR shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OSCR
Institutional investors own 73.9% of Oscar Health's shares and insiders 5.16%. The largest holder is BlackRock Inc with 6.67% of the shares (20.6M), as of June 30, 2026. Among the top 20 institutions, 16 added shares and 3 reduced their stake in the latest filings. Short interest is 6.51% of the float, or 3.02 days of average trading volume. The share count rose 876.7% since 2019.
Related: OSCR analyst forecast, OSCR key metrics. See the OSCR stock overview for the latest quote and news.
OSCR ownership FAQ
Who owns the most Oscar Health stock?
The largest shareholders of Oscar Health are BlackRock Inc (6.67%), T. Rowe Price Investment Management,Inc. (4.22%), D. E. Shaw & Co LP (4.10%), Vanguard Portfolio Management, LLC (3.57%), Vanguard Capital Management, LLC (3.43%).
What percentage of Oscar Health is owned by institutions?
Institutions hold 73.9% of Oscar Health's shares outstanding; insiders hold 5.16%.
Which funds own Oscar Health?
The largest fund holders of Oscar Health are Vanguard MStar Total Stk Mkt Idx Invest (2.47%), iShares Russell 2000 ETF (2.04%), Avantis US Small Cap Value ETF (1.93%), Vanguard Small Cap Index (1.78%), Vanguard MStar Small Cap Growth Indx Inv (1.02%).
What is Oscar Health's short interest?
16.5M shares of Oscar Health were sold short, 6.51% of the float; at the average daily volume it would take 3.02 days to cover.
Are insiders buying or selling Oscar Health?
Of the latest 11 reported insider transactions in Oscar Health (since May 12, 2025), 1 were purchases and 10 were sales.
How many shares of Oscar Health are outstanding?
Oscar Health has 273.5M shares outstanding, of which 263.6M are in the public float.