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Making an investment decision in the stock market involves a certain amount of risk, so it's important to thoroughly review a company's stock before making any decisions. Stock float, number of short positions and outstanding shares are among the many factors an investor should take into account.
Investors cannot turn a blind eye to insiders as well as institutional ownership. They need to follow insider trades to determine the direction the stock is likely to take.
About 74.37% of PMN shares are held by financial institutions. JANUS HENDERSON GROUP PLC is the top corporate investor, holding 1.29M shares valued at $16.42M. A 19.8% stake in ProMIS Neurosciences, Inc. is owned by the company. SPHERA FUNDS MANAGEMENT LTD. owns 325.59K shares valued at $4.14M, which translates its holding of 4.99% of the stake in the company.
| Date | Holder | % Stake | Shares Held | Total Value ($) | Shares | % Change in Portfolio |
|---|---|---|---|---|---|---|
| Mar 31, 2026 | JANUS HENDERSON GROUP PLC | 19.8% | 1.29M | 16.42M | 1.29M | +100.00% |
| Mar 31, 2026 | SPHERA FUNDS MANAGEMENT LTD. | 4.99% | 325.59K | 4.14M | 313.78K | +2,657.61% |
| Mar 31, 2026 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 2.13% | 139.28K | 1.77M | 139.28K | +100.00% |
| Mar 31, 2026 | DEEP TRACK CAPITAL, LP | 12.8% | 835.66K | 10.61M | 835.66K | +100.00% |
| Mar 31, 2026 | WELLINGTON MANAGEMENT GROUP LLP | 10.67% | 696.38K | 8.84M | 696.38K | +100.00% |
| Mar 31, 2026 | YU FAN | 5.05% | 329.76K | 4.19M | 329.76K | +100.00% |
| Mar 31, 2026 | ADAR1 CAPITAL MANAGEMENT, LLC | 1.46% | 95.35K | 1.21M | 95.35K | +100.00% |
| Mar 31, 2026 | ALLY BRIDGE GROUP (NY) LLC | 6.35% | 414.22K | 5.26M | 164.88K | +66.13% |
| Mar 31, 2026 | WOODLINE PARTNERS LP | 6.06% | 395.3K | 5.02M | 395.3K | +100.00% |
| Mar 31, 2026 | GREAT POINT PARTNERS LLC | 5.69% | 371.4K | 4.72M | 371.4K | +100.00% |
| Mar 31, 2026 | 683 CAPITAL MANAGEMENT, LLC | 1.42% | 92.85K | 1.18M | 92.85K | +100.00% |
| Mar 31, 2026 | MILLENNIUM MANAGEMENT LLC | 1.19% | 77.92K | 989.6K | 77.92K | +100.00% |
| Mar 31, 2026 | EMPERY ASSET MANAGEMENT, LP | 0.92% | 60.35K | 766.48K | 60.35K | +100.00% |
| Mar 31, 2026 | 0.16% | 10.6K | 134.62K | 10.6K | +100.00% | |
| Mar 31, 2026 | IKARIAN CAPITAL, LLC | 0.84% | 55K | 698.5K | 55K | +100.00% |
| Mar 31, 2026 | HEIGHTS CAPITAL MANAGEMENT, INC | 0.78% | 50.66K | 643.38K | 50.66K | +100.00% |
| Mar 31, 2026 | BOOTHBAY FUND MANAGEMENT, LLC | 0.25% | 16.04K | 203.75K | 16.04K | +100.00% |
| Mar 31, 2026 | UBS GROUP AG | 0.02% | 1.3K | 16.51K | -150 | -10.34% |
| Mar 31, 2026 | ADVISOR GROUP HOLDINGS, INC. | 0.01% | 360 | 4.57K | 0 | 0 |
| Mar 31, 2026 | ROYAL BANK OF CANADA | 0% | 268 | 4K | 50 | +22.94% |
| Mar 31, 2026 | STEWARD PARTNERS INVESTMENT ADVISORY, LLC | 0% | 100 | 1.27K | 100 | +100.00% |
| Mar 31, 2026 | FEDERATION DES CAISSES DESJARDINS DU QUEBEC | 0% | 10 | 127 | -320 | -96.97% |
| Mar 31, 2026 | TD WATERHOUSE CANADA INC. | 0% | 5 | 65 | -20 | -80.00% |
| Mar 31, 2026 | TOWER RESEARCH CAPITAL LLC (TRC) | 0% | 0 | - | -20 | -100.00% |
| Mar 31, 2026 | DISCIPLINED EQUITY MANAGEMENT, INC. | 0% | 0 | - | -1K | -100.00% |
Among the PMN insiders holding of 11.87% of the stake in company, JEREMY M. SCLAR 2012 IRREVOCABLE FAMILY TRUST, 10 percent owner, holds the largest shares of 3.14M. SCLAR JEREMY M., 10 percent owner, is the second largest PMN insider with ownership of 3.14M shares. ABG MANAGEMENT LTD., 10 percent owner, stands third with possession of 700.74K shares of that stake.
| Insiders | Designation | Shares Held |
|---|---|---|
| JEREMY M. SCLAR 2012 IRREVOCABLE FAMILY TRUST | 10 percent owner | 3.14M |
| SCLAR JEREMY M. | 10 percent owner | 3.14M |
| ABG MANAGEMENT LTD. | 10 percent owner | 700.74K |
| GORDON MICHAEL S | 10 percent owner | 539.1K |
| TITLE 19 PROMIS | 10 percent owner | 539.1K |
| SHAFMASTER MADGE K. | director | 208.33K |
| MILBURY MAX A. | Principal Accounting Officer | 45.39K |
| CASHMAN NEIL | Chief Scientific Officer | 16.62K |
| WILLIAMS EUGENE | director | 12.4K |
| KIRWIN PATRICK D. | director | 4.65K |
| KAPLAN JOHANNE | Chief Development Officer | 3.94K |
| FARFEL GAIL M | Chief Executive Officer | 2K |
| Date | Insider | Type | Cost | Shares | Value ($) | Shares Total |
|---|---|---|---|---|---|---|
| Apr 22, 2026 | KIRWIN PATRICK D. | PURCHASE | 11.33 | 4K | 45.32K | 4.65K |
| Mar 05, 2026 | WILLIAMS EUGENE | PURCHASE | 24.40 | 2K | 48.8K | 12.4K |
| Mar 04, 2026 | WILLIAMS EUGENE | PURCHASE | 24.00 | 2K | 48K | 10.4K |
| Mar 03, 2026 | WILLIAMS EUGENE | PURCHASE | 21.89 | 1K | 21.89K | 8.4K |
| Mar 02, 2026 | WILLIAMS EUGENE | PURCHASE | 22.53 | 1K | 22.53K | 7.4K |
| Feb 19, 2026 | KAPLAN JOHANNE | PURCHASE | 15.35 | 1.63K | 25.01K | 3.94K |
| Feb 03, 2026 | ABG MANAGEMENT LTD. | PURCHASE | 14.40 | 700.74K | 10.09M | 700.74K |
| Oct 03, 2025 | MILBURY MAX A. | PURCHASE | 0.49 | 30.39K | 14.93K | 45.39K |
| Jul 29, 2025 | JEREMY M. SCLAR 2012 IRREVOCABLE FAMILY TRUST | PURCHASE | 0.00 | 3.14M | - | 3.14M |
| Jul 29, 2025 | GORDON MICHAEL S | PURCHASE | 0.00 | 539.1K | - | 539.1K |
| Jul 29, 2025 | TITLE 19 PROMIS | PURCHASE | 0.00 | 539.1K | - | 539.1K |
| Jul 29, 2025 | SCLAR JEREMY M. | PURCHASE | 0.00 | 3.14M | - | 3.14M |
| Jun 30, 2025 | GORDON MICHAEL S | SALE | 0.00 | 93.22K | - | 0 |
| Feb 10, 2025 | CASHMAN NEIL | PURCHASE | 0.97 | 15K | 14.6K | 16.62K |
| Sep 24, 2024 | SHAFMASTER MADGE K. | PURCHASE | 1.30 | 70K | 91.03K | 208.33K |
| Sep 23, 2024 | SHAFMASTER MADGE K. | PURCHASE | 1.28 | 70K | 89.66K | 138.33K |
| Sep 20, 2024 | SHAFMASTER MADGE K. | PURCHASE | 1.25 | 60K | 75.07K | 68.33K |
| Sep 17, 2024 | GORDON MICHAEL S | PURCHASE | 1.40 | 16.29K | 22.81K | 93.22K |
| Sep 16, 2024 | GORDON MICHAEL S | PURCHASE | 1.22 | 76.93K | 94.07K | 76.93K |
| Aug 14, 2024 | KIRWIN PATRICK D. | PURCHASE | 1.25 | 10K | 12.49K | 62.98K |
| Jul 31, 2024 | TITLE 19 PROMIS | PURCHASE | 0.00 | 465.12K | - | 465.12K |
| Jul 31, 2024 | SCLAR JEREMY M. | PURCHASE | 0.00 | 697.67K | - | 697.67K |
| Jul 31, 2024 | GORDON MICHAEL S | PURCHASE | 0.00 | 465.12K | - | 465.12K |
| Dec 04, 2023 | SCLAR JEREMY M. | SALE | 0.00 | 150K | - | 0 |
| Dec 16, 2022 | WILLIAMS EUGENE | PURCHASE | 4.65 | 1K | 4.65K | 158.93K |
| Dec 15, 2022 | KIRWIN PATRICK D. | PURCHASE | 4.51 | 2K | 9.02K | 28K |
| Dec 14, 2022 | FARFEL GAIL M | PURCHASE | 4.94 | 1K | 4.94K | 2K |
| Dec 13, 2022 | KIRWIN PATRICK D. | PURCHASE | 4.87 | 1K | 4.87K | 26K |
| Dec 12, 2022 | WILLIAMS EUGENE | PURCHASE | 5.08 | 1K | 5.08K | 157.93K |
| Dec 09, 2022 | KIRWIN PATRICK D. | PURCHASE | 4.98 | 1K | 4.98K | 25K |
| Dec 07, 2022 | WILLIAMS EUGENE | PURCHASE | 5.49 | 1K | 5.49K | 156.93K |
| Dec 06, 2022 | FARFEL GAIL M | PURCHASE | 5.70 | 1K | 5.7K | 1K |
| Dec 02, 2022 | WILLIAMS EUGENE | PURCHASE | 5.98 | 1K | 5.98K | 155.93K |
| Oct 11, 2022 | SCLAR JEREMY M. | PURCHASE | 0.00 | 26.22K | - | 26.22K |
| Aug 17, 2022 | KIRWIN PATRICK D. | PURCHASE | 5.92 | 4K | 23.68K | 41.98K |
| Jul 11, 2022 | WILLIAMS EUGENE | PURCHASE | 9.80 | 1K | 9.8K | 154.93K |