DMAC insider buying – DiaMedica Therapeutics Inc.
36 insider purchases since 2016 worth $44.6M by 15 different insiders. Last 12 months: 1 purchases, $7.6M. Most recent filing: 2025-12-08.
Where insiders bought and sold DMAC – last 5 yearsCEO / officers Directors Funds & 10% owners Sales
Same time range as the chart above - each mark sits under the week of the trade. Circles = purchases (height = price paid, size = amount), red triangles = open-market sales of $50k+. Prices as reported, not adjusted for later stock splits. 10 older purchases (before the 5-year window) are listed in the table below.
Purchases are open-market buys (SEC Form 4, code "P") - insiders paying with their own money. Sales are open-market sales (code "S") of $50,000 or more; many sales are pre-planned (Rule 10b5-1) or made for taxes and diversification. Each row links to the original filing.
Bought, sold, still holding?
| Insider | Bought | First / last buy | Sold since 2016 | Holds now* | Status |
|---|---|---|---|---|---|
| STAHLBERG JAN 10% Owner | $14.4M 3× · 3,742,857 sh | 2024-06-28 2025-08-13 | – | 7,058,066 shares as of 2025-09-04 | Holds - never sold |
| Von Koch Thomas 10% Owner | $13.5M 2× · 5,712,989 sh | 2022-12-02 2025-07-23 | 1× · $3.5M last 2022-12-02 | 8,383,577 shares as of 2025-07-25 | Holds (sold earlier) |
| TRILL AB 10% Owner | $7.6M 1× · 1,061,277 sh | 2025-11-17 2025-11-17 | – | 8,503,518 shares as of 2025-12-08 | Holds - never sold |
| TomEqt Private AB 10% Owner | $5.0M 1× · 1,470,588 sh | 2023-06-23 2023-06-23 | – | 5,526,435 shares as of 2024-07-01 | Holds - never sold |
| JACINTO RICHARD II 10% Owner | $1.4M 1× · 400,000 sh | 2025-07-23 2025-07-23 | – | 4,958,823 shares as of 2025-07-25 | Holds - never sold |
| Wambeke David J. Officer | $949,203 3× · 527,114 sh | 2023-04-10 2023-11-16 | – | 527,114 shares as of 2025-06-03 | Holds - never sold |
| Giuffre Randall Michael Director | $559,245 6× · 240,431 sh | 2018-12-11 2023-06-23 | – | 445,230 shares as of 2026-01-06 | Holds - never sold |
| Pilnik Richard D. Director | $399,644 7× · 131,453 sh | 2018-12-11 2023-06-23 | – | 312,995 shares as of 2025-04-08 | Holds - never sold |
| TomEnterprise AB 10% Owner | $276,605 1× · 207,974 sh | 2022-07-08 2022-07-08 | – | 2,855,827 shares as of 2022-07-21 | Holds - never sold |
| Burroughs Amy L. Director | $141,592 1× · 44,950 sh | 2021-08-16 2021-08-16 | – | 73,288 shares as of 2023-01-03 | Holds - never sold |
| ALCORN HARRY W JR Officer | $140,394 3× · 42,981 sh | 2019-08-16 2021-09-15 | – | 43,981 shares as of 2021-09-15 | Holds - never sold |
| Kellen Scott CFO | $82,360 3× · 24,000 sh | 2019-05-24 2023-06-23 | – | 32,290 shares as of 2025-06-03 | Holds - never sold |
| Semba Charles Pauling Director | $49,997 1× · 12,787 sh | 2023-06-23 2023-06-23 | – | 47,963 shares as of 2026-01-06 | Holds - never sold |
| Pauls Dietrich John CEO | $35,700 2× · 10,000 sh | 2018-12-11 2021-08-16 | – | 128,791 shares as of 2026-08-12 | Holds - never sold |
| Xiao Zhenyu Director | $13,000 1× · 3,250 sh | 2018-12-11 2018-12-11 | – | 1,007,100 shares as of 2019-06-26 | Holds - never sold |
* Shares held after the insider's most recent SEC filing for this company (all share classes, direct and indirect). If an insider stops filing, later changes are not known.
Insider buying and selling by year
| Year | Purchases | Bought | Buyers | Sales | Sold |
|---|---|---|---|---|---|
| 2025 | 5 | $30.4M | 4 | – | – |
| 2024 | 1 | $3.0M | 1 | – | – |
| 2023 | 8 | $6.4M | 6 | – | – |
| 2022 | 6 | $4.1M | 4 | 1 | $3.5M |
| 2021 | 6 | $358,827 | 5 | – | – |
| 2020 | 2 | $117,600 | 2 | – | – |
| 2019 | 4 | $104,414 | 3 | – | – |
| 2018 | 4 | $103,000 | 4 | – | – |
Insider purchases
| Filed | Insider | Role | Shares | Avg price | Value | Holdings | Filing |
|---|---|---|---|---|---|---|---|
| 2025-12-08 | TRILL AB | 10% Owner | 1,061,277 | $7.19 | $7.6M | +13.7% | SEC |
| 2025-09-04 | STAHLBERG JAN | 10% Owner | 1,000,000 | $5.96 | $6.0M | +14.8% | SEC |
| 2025-07-25 | Von Koch Thomas | 10% Owner | 2,857,142 | $3.50 | $10.0M | +51.7% | SEC |
| 2025-07-25 | STAHLBERG JAN | 10% Owner | 1,542,857 | $3.50 | $5.4M | +29.5% | SEC |
| 2025-07-25 | JACINTO RICHARD II | 10% Owner | 400,000 | $3.50 | $1.4M | +8.8% | SEC |
| 2024-07-01 | STAHLBERG JAN | 10% Owner | 1,200,000 | $2.50 | $3.0M | +29.8% | SEC |
| 2023-11-16 | Wambeke David J. | Officer | 20,000 | $2.46 | $49,200 | +3.9% | SEC |
| 2023-06-27 | TomEqt Private AB | 10% Owner | 1,470,588 | $3.40 | $5.0M | +51.5% | SEC |
| 2023-06-26 | Wambeke David J. | Officer | 38,364 | $3.91 | $150,003 | +8.2% | SEC |
| 2023-06-26 | Semba Charles Pauling | Director | 12,787 | $3.91 | $49,997 | +74.5% | SEC |
| 2023-06-26 | Pilnik Richard D. | Director | 38,363 | $3.91 | $149,999 | +18.3% | SEC |
| 2023-06-26 | Kellen Scott | CFO | 10,000 | $3.91 | $39,100 | +44.9% | SEC |
| 2023-06-26 | Giuffre Randall Michael | Director | 65,000 | $3.91 | $254,150 | +22.0% | SEC |
| 2023-04-11 | Wambeke David J. | Officer | 468,750 | $1.60 | $750,000 | SEC | |
| 2022-12-12 | Giuffre Randall Michael | Director | 57,079 | $1.42 | $81,023 | +28.1% | SEC |
| 2022-12-08 | Giuffre Randall Michael | Director | 24,874 | $1.40 | $34,709 | +14.0% | SEC |
| 2022-12-06 | Von Koch Thomas | 10% Owner | 2,855,847 | $1.24 | $3.5M | SEC | |
| 2022-12-05 | Pilnik Richard D. | Director | 35,000 | $1.39 | $48,650 | +29.3% | SEC |
| 2022-12-01 | Giuffre Randall Michael | Director | 67,228 | $1.20 | $80,463 | +61.0% | SEC |
| 2022-07-21 | TomEnterprise AB | 10% Owner | 207,974 | $1.33 | $276,605 | +7.9% | SEC |
| 2021-09-15 | ALCORN HARRY W JR | Officer | 15,000 | $3.80 | $57,000 | +52.5% | SEC |
| 2021-08-17 | Pilnik Richard D. | Director | 15,000 | $3.27 | $49,025 | +18.6% | SEC |
| 2021-08-17 | Burroughs Amy L. | Director | 44,950 | $3.15 | $141,592 | SEC | |
| 2021-08-16 | Pauls Dietrich John | CEO | 5,000 | $3.14 | $15,700 | +16.2% | SEC |
| 2021-08-16 | Kellen Scott | CFO | 10,000 | $3.15 | $31,500 | +81.4% | SEC |
| 2021-08-16 | ALCORN HARRY W JR | Officer | 20,721 | $3.09 | $64,010 | +263.6% | SEC |
| 2020-12-04 | Pilnik Richard D. | Director | 10,000 | $5.37 | $53,700 | +16.4% | SEC |
| 2020-11-23 | Giuffre Randall Michael | Director | 15,000 | $4.26 | $63,900 | +16.0% | SEC |
| 2019-08-19 | Pilnik Richard D. | Director | 7,840 | $2.56 | $20,070 | +18.3% | SEC |
| 2019-08-16 | ALCORN HARRY W JR | Officer | 7,260 | $2.67 | $19,384 | +726.0% | SEC |
| 2019-05-31 | Pilnik Richard D. | Director | 19,000 | $2.80 | $53,200 | +79.7% | SEC |
| 2019-05-28 | Kellen Scott | CFO | 4,000 | $2.94 | $11,760 | +121.6% | SEC |
| 2018-12-11 | Xiao Zhenyu | Director | 3,250 | $4.00 | $13,000 | +84.4% | SEC |
| 2018-12-11 | Pilnik Richard D. | Director | 6,250 | $4.00 | $25,000 | +35.5% | SEC |
| 2018-12-11 | Pauls Dietrich John | CEO | 5,000 | $4.00 | $20,000 | +20.2% | SEC |
| 2018-12-11 | Giuffre Randall Michael | Director | 11,250 | $4.00 | $45,000 | +15.1% | SEC |
Insider sales
| Filed | Insider | Role | Shares | Avg price | Value | Type | Filing |
|---|---|---|---|---|---|---|---|
| 2022-12-06 | Von Koch Thomas | 10% Owner | 2,855,847 | $1.24 | $3.5M | Sale | SEC |
Compiled automatically from public SEC filings. Not investment advice. Get every new insider purchase in the daily report.
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