Who holds it, who is betting against it, and where the big money is moving
Net of large-order buying minus selling, in USD. Over this window: −$14.70M (7 inflow days, 13 outflow days).
Super/Big orders approximate institutional-size trades; Mid/Small approximate retail-size trades. Net buy minus sell value in each bucket, summed over the window.
The five largest holders on file together own 31.1% of shares outstanding.
Reported short interest has risen from 19.18% to 19.98% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).
| Holder | Type | Period | Share change | New stake |
|---|---|---|---|---|
| Nuveen Asset Management LLC | Insurance Company | 2026/Q3 | +64,696 | 0.2% |
| Deep Track Capital, LP | VC/PE Fund | 2026/Q3 | +969,000 | 2.6% |
| Baron Capital Group, Inc. | Mutual Fund | 2026/Q3 | +809,350 | 2.2% |
| Janus Henderson Group plc | Mutual Fund | 2026/Q3 | +565,627 | 1.5% |
| Divisadero Street Capital Management, LP | Hedge Fund | 2026/Q3 | +439,155 | 1.2% |
| Schonfeld Strategic Advisors LLC | Hedge Fund | 2026/Q3 | +319,625 | 0.9% |
| BlackRock | Mutual Fund | 2026/Q3 | +187,358 | 7.3% |
| Citadel Advisors LLC | Hedge Fund | 2026/Q3 | +138,616 | 1.0% |
| Jackson National Asset Management, LLC | Mutual Fund | 2026/Q3 | +120,054 | 0.3% |
| Royce & Associates, LP | Mutual Fund | 2026/Q3 | +114,874 | 0.4% |
| Dimensional Fund Advisors | Mutual Fund | 2026/Q3 | +87,516 | 1.8% |
| State Street Global Advisors | Mutual Fund | 2026/Q3 | +84,841 | 2.5% |
| Millennium Management LLC | Hedge Fund | 2026/Q3 | +84,182 | 0.2% |
| FirstWave Capital Management, LLC | Hedge Fund | 2026/Q3 | +68,058 | 0.6% |
| Geode Capital Management, LLC | Mutual Fund | 2026/Q3 | +53,526 | 2.4% |
Institutional buy/sell activity by reporting period, largest moves first.
| Date | Insider | Title | Transaction | Shares | Price | Held after |
|---|---|---|---|---|---|---|
| 13 Aug 2026 | Amir Shojaei | Chief Scientific Officer | Derivative Exercise and Sale | -11,250 | $40.00 | – |
| 17 Jun 2026 | Adrienne Graves | Director | Other Derivative Acquisition | +5,248 | – | 5,248 |
| 17 Jun 2026 | Lauren Silvernail | Director | Other Derivative Acquisition | +5,248 | – | 5,248 |
| 17 Jun 2026 | Perry Sternberg | Independent Director | Other Derivative Acquisition | +5,248 | – | 5,248 |
| 17 May 2026 | Adrienne Graves | Director | Open Market Acquisition | +1,000 | $31.07 | 1,000 |
| 17 May 2026 | Lauren Silvernail | Director | Open Market Acquisition | +1,000 | $31.00 | 1,000 |
| 14 May 2026 | Amir Shojaei | Chief Scientific Officer | Other Derivative Acquisition | +10,000 | – | 10,000 |
| 13 May 2026 | Mark Baum | Chairperson & CEO | Open Market Acquisition | +10,000 | $30.20 | 2,996,130 |
| 13 May 2026 | Andrew Boll | Chief Financial Officer | Open Market Acquisition | +3,500 | $29.90 | 814,679 |
| 3 Mar 2026 | Opaleye Management Inc. | Open Market Disposition | -198,572 | $39.67 | 3,681,428 | |
| 26 Feb 2026 | Opaleye Management Inc. | Open Market Disposition | -5,000 | $54.18 | 3,880,000 | |
| 5 Jan 2026 | Opaleye Management Inc. | Open Market Disposition | -20,000 | $53.35 | 3,885,000 | |
| 11 Dec 2025 | Mark Baum | Chairperson & CEO | Derivative Exercise and Sale | -79,994 | $47.06 | 2,986,130 |
| 11 Dec 2025 | Mark Baum | Chairperson & CEO | Derivative Exercise and Retained | +100,006 | $3.95 | 2,986,130 |
| 11 Dec 2025 | Andrew Boll | Chief Financial Officer | Derivative Exercise and Sale | -26,665 | $47.06 | 811,179 |
| 11 Dec 2025 | Andrew Boll | Chief Financial Officer | Derivative Exercise and Retained | +33,335 | $3.95 | 811,179 |
| 31 Aug 2025 | Randall Pollard | Chief Accounting Officer | Other Derivative Acquisition | +30,000 | $39.00 | 30,000 |
| 20 Jul 2025 | Mark Baum | Chairperson & CEO | Derivative Exercise and Sale | -313,338 | $37.08 | 2,886,124 |
| 20 Jul 2025 | Mark Baum | Chairperson & CEO | Derivative Exercise and Retained | +286,662 | $7.87 | 2,886,124 |
| 30 Jun 2025 | Mark Baum | Chairperson & CEO | Other Derivative Acquisition | +889,500 | – | 889,500 |
From Form 4/Form 144 filings. Negative share counts are disposals (sales, gifts, or shares withheld for taxes); positive are acquisitions.
| Report date | Shares short | % of float | Days to cover |
|---|---|---|---|
| 15 Sep 2026 | 7,488,381 | 20.0% | 15.7 |
| 31 Aug 2026 | 6,778,977 | 18.1% | 13.7 |
| 14 Aug 2026 | 6,358,236 | 17.0% | 10.3 |
| 31 Jul 2026 | 6,783,121 | 18.2% | 11.8 |
| 15 Jul 2026 | 6,844,497 | 18.4% | 12.6 |
| 30 Jun 2026 | 7,148,618 | 19.2% | 7.8 |
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