ProMIS Neurosciences
Develops EpiSelect-discovered antibodies for protein-misfolding neurodegenerative disorders.
$13.79
After-hours close−0.10 (−0.68%)
At close$13.88(−0.79%)
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Breakdown13F · Form 4
Institutions 469.82%Insiders 22.14%
A 13F quarter can total more than the shares outstanding — sub-advisers file the same block twice, and a filer's own share count can be a quarter stale. No split is drawn from it.
Shares outstanding 1.31M · Float 838.2K · 64.1% free float
Institutions13F, as of Mar 31, 2026
25 holders · 6.14M shares · 18 new positions · 21 increased · 3 reduced · 2 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Janus Henderson Group PLC | 1.29M | 98.87% | +1.29Mnew | May 18, 2026 |
| Deep Track Capital, LP | 835.7K | 63.91% | +835.7Knew | May 15, 2026 |
| Wellington Management Group LLP | 696.4K | 53.26% | +696.4Knew | May 15, 2026 |
| Trails Edge Capital Partners, LP | 557.1K | 42.61% | +557.1Knew | May 15, 2026 |
| Ally Bridge Group (NY) LLC | 414.2K | 31.68% | +164.9K | May 18, 2026 |
| Woodline Partners LP | 395.3K | 30.23% | +395.3Knew | May 15, 2026 |
| Great Point Partners LLC | 371.4K | 28.40% | +371.4Knew | May 15, 2026 |
| Yu Fan | 329.8K | 25.22% | +329.8Knew | May 18, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Fan Yuincl. Ally Bridge Group (NY) LLC, ABG Management Ltd. +6 more | 17.00% | 1.64M | 13D | Feb 5, 2026 ↗ |
| Jeremy M. Sclar | 16.90% | 13G | Oct 15, 2025 ↗ | |
| Janus Henderson Group PLC | 14.40% | 1.29M | 13G | Apr 7, 2026 ↗ |
| Shaf QIC LLC | 10.01% | 13G | Jul 31, 2025 ↗ | |
| Wellington Management Group LLP | 10.00% | 895.9K | 13G | May 15, 2026 ↗ |
| Great Point Partners, LLC | 9.99% | 954.1K | 13G | May 15, 2026 ↗ |
| Wellington Biomedical Innovation Master Investors (Cayman) II, L.P. | 9.99% | 895.9K | 13G | Mar 18, 2026 ↗ |
| Deep Track Capital, LP | 9.99% | 902.6K | 13G | Feb 6, 2026 ↗ |
| Trails Edge Capital Partners, LP | 9.90% | 933.5K | 13G | Feb 10, 2026 ↗ |
| Armistice Capital, LLCincl. Steven Boyd | 8.17% | Nov 14, 2024 ↗ | ||
| Sphera Funds Management Ltd. | 7.78% | 180.7K | 13G | Feb 5, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| ABG V-SIV IX Ltd | 10 percent owner | 943.1K | 72.13% | Feb 25, 2026 |
| ABG Management Ltd. | 10 percent owner | 943.1K | 72.13% | Feb 5, 2026 |
| Slanix Paul Alex | director | 242.4K | 18.53% | Oct 24, 2025 |
| Shaf QIC LLC | 10 percent owner | 207.4K | 15.86% | Aug 14, 2025 |
| Jeremy M. Sclar 2012 Irrevocable Family Trust | 10 percent owner | 120.5K | 9.22% | Sep 30, 2025 |
| Sclar Jeremy M. | 10 percent owner | 120.5K | 9.22% | Sep 8, 2025 |
| Title 19 Promis | 10 percent owner | 92.6K | 7.08% | Jul 29, 2025 |
| Eugene Williams | director | 12.4K | 0.95% | Mar 6, 2026 |
| Patrick D. Kirwin | director | 9.8K | 0.75% | Apr 23, 2026 |
| Max A. Milbury | other: Principal Accounting Officer | 8.4K | 0.64% | Feb 5, 2026 |
6 ten-percent owners hold 2.43M shares by Form 4 — the 13D/G table above shows those stakes, the figure above counts officers and directors only · 5 people have not refiled in the last 18 months (13.4K shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 5, 2026 | Johanne Kaplanofficer: Chief Development Officer | Purchase | 2,280 | $13.30 | 6,221 |
| Apr 22, 2026 | Patrick D. Kirwindirector | Purchase | 4,000 | $11.33 | 4,653 |
| Mar 5, 2026 | Eugene Williamsdirector | Purchase | 2,000 | $24.40 | 12,397 |
| Mar 2, 2026 | Eugene Williamsdirector | Purchase | 1,000 | $22.53 | 7,397 |
| Mar 3, 2026 | Eugene Williamsdirector | Purchase | 1,000 | $21.89 | 8,397 |
| Mar 4, 2026 | Eugene Williamsdirector | Purchase | 2,000 | $24.00 | 10,397 |
| Feb 19, 2026 | Johanne Kaplanofficer: Chief Development Officer | Purchase | 1,629 | $15.35 | 3,941 |
| Feb 3, 2026 | ABG Management Ltd.10 percent owner | Purchase · 2 lots | 1,401,482 | $13.27 | 1,643,831 |
| Oct 3, 2025 | Max A. Milburyother: Principal Accounting Officer | Purchase | 30,392 | $0.4912 | 45,389 |
| Jul 29, 2025 | Jeremy M. Sclar 2012 Irrevocable Family Trust10 percent owner | Purchase | 3,139,533 | 3,139,533 |
CongressHouse and Senate disclosures
Not reported.