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: −$1.61M (10 inflow days, 10 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 41.6% of shares outstanding.
Reported short interest has risen from 15.30% to 23.60% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).
| Holder | Type | Period | Share change | New stake |
|---|---|---|---|---|
| Dimensional Fund Advisors | Mutual Fund | 2026/Q3 | +106,001 | 0.2% |
| Nuveen Asset Management LLC | Insurance Company | 2026/Q3 | +86,314 | 0.2% |
| Divisadero Street Capital Management, LP | Hedge Fund | 2026/Q3 | +1,959,183 | 5.8% |
| Tri Locum Partners LP | Hedge Fund | 2026/Q3 | +493,344 | 0.9% |
| Bank of America Corporation | Public Company | 2026/Q3 | +427,742 | 1.0% |
| J.P. Morgan Asset Management, Inc. | Mutual Fund | 2026/Q3 | +415,426 | 1.2% |
| The Goldman Sachs Group, Inc. | Public Company | 2026/Q3 | +395,185 | 0.9% |
| Eventide Asset Management, LLC | Mutual Fund | 2026/Q3 | +308,185 | 11.9% |
| BlackRock | Mutual Fund | 2026/Q3 | +301,576 | 6.3% |
| Trexquant Investment LP | Hedge Fund | 2026/Q3 | +252,834 | 0.9% |
| AQR Capital Management | Hedge Fund | 2026/Q3 | +244,910 | 0.6% |
| Balyasny Asset Management L.P. | Hedge Fund | 2026/Q3 | +237,767 | 1.6% |
| Mariner, LLC | Mutual Fund | 2026/Q3 | +220,359 | 0.4% |
| Norges Bank Investment Management | Sovereign Wealth Fund | 2026/Q3 | +194,011 | 0.4% |
| Squarepoint OPS LLC | Hedge Fund | 2026/Q3 | +161,098 | 0.3% |
Institutional buy/sell activity by reporting period, largest moves first.
| Date | Insider | Title | Transaction | Shares | Price | Held after |
|---|---|---|---|---|---|---|
| 30 Sep 2026 | Mark Hopman | Chief Commercial Officer | Automatic Disposition | -370 | $18.96 | 56,109 |
| 21 Sep 2026 | Christina Jones | Independent Director | Automatic Disposition | -6,430 | $23.00 | 4,842 |
| 15 Sep 2026 | Mark Hopman | Chief Commercial Officer | Automatic Disposition | -30,779 | $20.13 | 56,479 |
| 15 Sep 2026 | Mike Mensinger | Chief Product Officer | Automatic Disposition | -2,650 | $22.00 | 177,390 |
| 13 Sep 2026 | Mark Hopman | Chief Commercial Officer | Automatic Disposition | -775 | $15.52 | 86,382 |
| 8 Sep 2026 | Mark Hopman | Chief Commercial Officer | Open Market Disposition | -35,994 | $18.46 | 88,033 |
| 2 Sep 2026 | Sean Saint | Chief Executive Officer | Automatic Disposition | -5,641 | $20.08 | 398,429 |
| 1 Sep 2026 | Sean Saint | Chief Executive Officer | Open Market Disposition | -16,867 | $19.11 | 404,070 |
| 1 Sep 2026 | Stephen Feider | Chief Financial Officer | Open Market Disposition | -6,675 | $19.11 | 159,378 |
| 1 Sep 2026 | Steven Russell | Chief Medical Officer | Open Market Disposition | -4,221 | $19.11 | 169,628 |
| 1 Sep 2026 | Mark Hopman | Chief Commercial Officer | Open Market Disposition | -5,327 | $19.11 | 124,027 |
| 1 Sep 2026 | Mike Mensinger | Chief Product Officer | Open Market Disposition | -4,375 | $19.11 | 180,040 |
| 28 Jun 2026 | Stephen Feider | Chief Financial Officer | Derivative Exercise and Sale | -10,000 | $17.05 | 166,053 |
| 23 Jun 2026 | Christina Jones | Independent Director | Automatic Disposition | -1,406 | $15.00 | 5,032 |
| 23 Jun 2026 | Mark Hopman | Chief Commercial Officer | Automatic Disposition | -1,258 | $15.01 | 129,354 |
| 3 Jun 2026 | Christina Jones | Independent Director | Automatic Disposition | -2,811 | $14.00 | 6,438 |
| 3 Jun 2026 | Mark Hopman | Chief Commercial Officer | Automatic Disposition | -275 | $12.31 | 130,612 |
| 1 Jun 2026 | Sean Saint | Chief Executive Officer | Open Market Disposition | -16,872 | $12.61 | 420,937 |
| 1 Jun 2026 | Stephen Feider | Chief Financial Officer | Open Market Disposition | -6,676 | $12.61 | 166,053 |
| 1 Jun 2026 | Steven Russell | Chief Medical Officer | Open Market Disposition | -4,222 | $12.61 | 173,849 |
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 | 10,617,768 | 23.6% | 9.9 |
| 31 Aug 2026 | 9,400,691 | 20.9% | 9.0 |
| 14 Aug 2026 | 7,494,706 | 16.7% | 5.5 |
| 31 Jul 2026 | 7,604,900 | 16.9% | 6.0 |
| 15 Jul 2026 | 6,609,679 | 14.8% | 7.0 |
| 30 Jun 2026 | 6,819,825 | 15.3% | 5.9 |
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