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: +$78.3K (9 inflow days, 11 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 27.0% of shares outstanding.
Reported short interest has fallen from 4.83% to 4.42% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).
| Holder | Type | Period | Share change | New stake |
|---|---|---|---|---|
| Paul Glavine | Individual/Insider | 2026/Q3 | +4,470,254 | 6.5% |
| Eric So | Individual/Insider | 2026/Q3 | +4,455,515 | 6.5% |
| Michael Halstead | Individual/Insider | 2026/Q3 | +168,568 | 0.2% |
| Amir Inamdar | Individual/Insider | 2026/Q3 | +204,176 | 0.3% |
| Aaron Bartlone | Individual/Insider | 2026/Q3 | +190,833 | 0.3% |
| Adage Capital Management, L.P. | Hedge Fund | 2026/Q3 | +2,360,000 | 4.2% |
| Sio Capital Management, LLC | Hedge Fund | 2026/Q3 | +1,300,000 | 1.8% |
| Logos Global Management, L.P. | Hedge Fund | 2026/Q3 | +750,000 | 1.0% |
| Dcf Advisers, Llc | Mutual Fund | 2026/Q3 | +743,000 | 2.0% |
| Sphera Funds Management Ltd | Hedge Fund | 2026/Q3 | +633,663 | 2.2% |
| Pivotal BioVenture Partners LLC | VC/PE Fund | 2026/Q3 | +527,222 | 1.4% |
| Walleye Capital LLC | Hedge Fund | 2026/Q3 | +502,554 | 0.7% |
| Rosalind Advisors, Inc. | Hedge Fund | 2026/Q3 | +425,000 | 2.7% |
| Bank of America Corporation | Public Company | 2026/Q3 | +337,435 | 0.5% |
| JPMorgan Chase & Co. | Public Company | 2026/Q3 | +235,584 | 0.3% |
Institutional buy/sell activity by reporting period, largest moves first.
| Date | Insider | Title | Transaction | Shares | Price | Held after |
|---|---|---|---|---|---|---|
| 29 Sep 2026 | Eric So | Co-Founder, President & Executive Chairman | Other Acquisition | +248,000 | – | 4,766,630 |
| 29 Sep 2026 | Paul Glavine | Co-Founder, Chief Growth Officer & Director | Other Acquisition | +248,000 | – | 4,750,191 |
| 28 Sep 2026 | Greg Cavers | Chief Financial Officer | Open Market Acquisition | +3,000 | $12.91 | 128,937 |
| 28 Sep 2026 | Greg Cavers | Chief Financial Officer | Initial Statement of Beneficial | +0 | – | 66,668 |
| 20 Sep 2026 | Michael Halstead | Chief Executive Officer | Open Market Acquisition | +100,000 | $13.47 | 168,568 |
| 16 Sep 2026 | Michael Halstead | Chief Executive Officer | Initial Statement of Beneficial | +0 | – | 1,075,000 |
| 7 Sep 2026 | Eric So | Co-Founder, President & Executive Chairman | Open Market Acquisition | +100,000 | $12.39 | 4,518,630 |
| 3 Sep 2026 | Eric So | Co-Founder, President & Executive Chairman | Open Market Acquisition | +100,000 | $12.09 | 4,418,630 |
| 2 Sep 2026 | Paul Glavine | Co-Founder, Chief Growth Officer & Director | Open Market Acquisition | +100,000 | $11.78 | 4,402,193 |
| 31 Aug 2026 | Eric So | Co-Founder, President & Executive Chairman | Open Market Acquisition | +95,000 | $11.81 | 4,318,630 |
| 31 Aug 2026 | Eric So | Co-Founder, President & Executive Chairman | Initial Statement of Beneficial | +0 | – | 105,264 |
| 30 Aug 2026 | Paul Glavine | Co-Founder, Chief Growth Officer & Director | Open Market Acquisition | +90,000 | $11.59 | 4,302,193 |
| 30 Aug 2026 | Paul Glavine | Co-Founder, Chief Growth Officer & Director | Initial Statement of Beneficial | +0 | – | 105,263 |
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 | 3,226,518 | 4.4% | 2.3 |
| 31 Aug 2026 | 3,020,958 | 4.1% | 2.0 |
| 14 Aug 2026 | 3,199,348 | 5.2% | 1.4 |
| 31 Jul 2026 | 3,153,149 | 5.1% | 1.7 |
| 15 Jul 2026 | 3,257,009 | 5.3% | 2.9 |
| 30 Jun 2026 | 2,995,534 | 4.8% | 1.6 |
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