The largest holder of Oscar Health stock is BlackRock Advisors LLC, with 19.1 million shares (7.18% of the company), worth about $572.00 million as of September 25, 2026. The 10 largest holders together own 38.3%.
In Q2 2026, 447 institutional holdings reports listed 207.0 million shares worth $5.96 billion, up 18.3% in shares from Q1 2026.
Insiders reported 71 transactions in the last two years: 27 sales worth $26.97 million and 7 purchases. The newest one on file is from May 14, 2026 (Blackley Richard Scott, Chief Financial Officer).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through May 14, 2026.

2026Q2
| Holder | Shares | % of company | Value |
|---|---|---|---|
| BlackRock Advisors LLC | 19.1 million | 7.18% | $572.0M |
| T. Rowe Price Investment Management, Inc. | 13.0 million | 4.90% | $391.0M |
| D.E. Shaw & Co., Inc. | 12.6 million | 4.75% | $379.0M |
| Vanguard Portfolio Management LLC | 11.0 million | 4.15% | $330.0M |
| Vanguard Capital Management LLC | 10.6 million | 3.98% | $317.0M |
| American Century Cos., Inc. | 9.1 million | 3.40% | $271.0M |
| Mark Bertolini2.915 % | 7.8 million | 2.92% | $232.0M |
| Jane Street Group LLC | 6.4 million | 2.39% | $191.0M |
| Thrive Capital Management, LLC | 6.3 million | 2.39% | $190.0M |
| Geode Capital Management LLC | 5.8 million | 2.19% | $174.0M |
As of September 25, 2026.
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 447 | 207.0 million | $6.0B |
| Q1 2026 | 370 | 175.0 million | $2.0B |
| Q4 2025 | 389 | 172.0 million | $2.5B |
| Q3 2025 | 396 | 153.0 million | $2.9B |
| Q2 2025 | 377 | 170.0 million | $3.6B |
| Q1 2025 | 330 | 187.0 million | $2.5B |
| Q4 2024 | 298 | 195.0 million | $2.6B |
| Q3 2024 | 311 | 181.0 million | $3.8B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Blackley Richard Scott | May 14, 2026 | Chief Financial Officer | Sale at price 23.10 - 23.79 per share. | $2.3M |
| Bertolini Mark T | Apr 6, 2026 | Chief Executive Officer | Purchase at price 11.92 per share. | $11.9M |
| Bertolini Mark T | Apr 2, 2026 | Chief Executive Officer | -- | – |
| Blackley Richard Scott | Mar 12, 2026 | Chief Financial Officer | Stock Gift at price 0.00 per share. | – |
| Mcananey Adam | Mar 2, 2026 | Officer | Sale at price 13.39 per share. | $250,527 |
| Schlosser Mario T | Mar 2, 2026 | Chief Technology Officer | Sale at price 13.39 per share. | $325,846 |
| Liang Janet | Mar 2, 2026 | Officer | Sale at price 13.39 per share. | $99,796 |
| Baltrus Victoria | Mar 2, 2026 | Officer | Sale at price 13.39 per share. | $62,103 |
| Blackley Richard Scott | Mar 2, 2026 | Chief Financial Officer | Sale at price 13.39 per share. | $257,369 |
| Baltrus Victoria | Mar 2, 2026 | Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Bertolini Mark T | Mar 2, 2026 | Chief Executive Officer | Stock Award(Grant) at price 0.00 per share. | – |
| Blackley Richard Scott | Mar 2, 2026 | Chief Financial Officer | Stock Award(Grant) at price 0.00 per share. | – |
Newest 12 of 71 insider transactions in the last two years.
BlackRock Advisors LLC, with 7.18% of the company (as of September 25, 2026). Next: T. Rowe Price Investment Management, Inc. (4.90%) and D.E. Shaw & Co., Inc. (4.75%).
447 institutional holdings reports listed Oscar Health shares in Q2 2026, 207.0 million shares in all worth $5.96 billion.
In the last two years insiders reported 27 sales and 7 purchases (71 transactions in all); the newest on file is from May 14, 2026.