ZYME insider buying – Zymeworks Inc.
18 insider purchases since 2016 worth $89.8M by 2 different insiders. Last 12 months: 0 purchases, $0. Most recent filing: 2025-05-19.
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.
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 |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC Director | $73.1M 16× · 7,661,339 sh | 2023-01-10 2025-05-15 | – | 17,877,989 shares as of 2025-05-19 | Holds - never sold |
| NODELMAN OLEG Director | $16.7M 2× · 1,399,188 sh | 2025-03-11 2025-04-03 | – | 22,970,388 shares as of 2025-06-27 | 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 |
|---|---|---|---|---|---|
| 2026 | 0 | – | – | 7 | $3.4M |
| 2025 | 12 | $38.6M | 2 | 4 | $2.6M |
| 2024 | 1 | $1.9M | 1 | 3 | $428,175 |
| 2023 | 5 | $49.4M | 1 | – | – |
Insider purchases
| Filed | Insider | Role | Shares | Avg price | Value | Holdings | Filing |
|---|---|---|---|---|---|---|---|
| 2025-05-19 | EcoR1 Capital, LLC | Director | 55,421 | $11.47 | $635,534 | +0.3% | SEC |
| 2025-04-18 | EcoR1 Capital, LLC | Director | 128,713 | $11.31 | $1.5M | +0.7% | SEC |
| 2025-04-07 | NODELMAN OLEG | Director | 317,208 | $11.43 | $3.6M | +1.8% | SEC |
| 2025-04-02 | EcoR1 Capital, LLC | Director | 127,415 | $11.75 | $1.5M | +0.7% | SEC |
| 2025-03-27 | EcoR1 Capital, LLC | Director | 97,349 | $12.61 | $1.2M | +0.6% | SEC |
| 2025-03-24 | EcoR1 Capital, LLC | Director | 127,198 | $12.92 | $1.6M | +0.7% | SEC |
| 2025-03-19 | EcoR1 Capital, LLC | Director | 228,463 | $12.54 | $2.9M | +1.4% | SEC |
| 2025-03-13 | NODELMAN OLEG | Director | 1,081,980 | $12.12 | $13.1M | +6.9% | SEC |
| 2025-01-21 | EcoR1 Capital, LLC | Director | 141,429 | $13.89 | $2.0M | +0.9% | SEC |
| 2025-01-15 | EcoR1 Capital, LLC | Director | 167,654 | $13.59 | $2.3M | +1.1% | SEC |
| 2025-01-10 | EcoR1 Capital, LLC | Director | 225,119 | $13.22 | $3.0M | +1.5% | SEC |
| 2025-01-02 | EcoR1 Capital, LLC | Director | 363,369 | $14.64 | $5.3M | +2.5% | SEC |
| 2024-12-27 | EcoR1 Capital, LLC | Director | 130,309 | $14.44 | $1.9M | +0.9% | SEC |
| 2023-06-21 | EcoR1 Capital, LLC | 10% Owner | 3,350,000 | $8.12 | $27.2M | +33.2% | SEC |
| 2023-03-30 | EcoR1 Capital, LLC | 10% Owner | 200,000 | $8.00 | $1.6M | +2.0% | SEC |
| 2023-01-23 | EcoR1 Capital, LLC | 10% Owner | 307,500 | $9.70 | $3.0M | +3.2% | SEC |
| 2023-01-18 | EcoR1 Capital, LLC | 10% Owner | 985,100 | $9.84 | $9.7M | +11.5% | SEC |
| 2023-01-12 | EcoR1 Capital, LLC | 10% Owner | 1,026,300 | $7.67 | $7.9M | +13.6% | SEC |
Insider sales
| Filed | Insider | Role | Shares | Avg price | Value | Type | Filing |
|---|---|---|---|---|---|---|---|
| 2026-01-13 | Hollywood Mark | Officer | 6,120 | $22.67 | $138,740 | Sale | SEC |
| 2026-01-12 | Smith Jeffrey T L | Officer | 9,310 | $22.67 | $211,058 | Sale | SEC |
| 2026-01-12 | Moore Paul Andrew | Officer | 9,560 | $22.67 | $216,725 | Sale | SEC |
| 2026-01-12 | Galbraith Kenneth | CEO | 30,424 | $22.67 | $689,712 | Sale | SEC |
| 2026-01-05 | Smith Jeffrey T L | Officer | 10,538 | $25.10 | $264,504 | Sale | SEC |
| 2026-01-05 | Moore Paul Andrew | Officer | 20,110 | $25.10 | $504,761 | Sale | SEC |
| 2026-01-05 | Galbraith Kenneth | CEO | 54,343 | $25.10 | $1.4M | Sale | SEC |
| 2025-12-22 | Galbraith Kenneth | CEO | 47,528 | $27.02 | $1.3M | Sale | SEC |
| 2025-01-06 | Smith Jeffrey T L | Officer | 11,110 | $14.92 | $165,761 | Sale | SEC |
| 2025-01-06 | Moore Paul Andrew | Officer | 21,200 | $14.92 | $316,304 | Sale | SEC |
| 2025-01-06 | Galbraith Kenneth | CEO | 57,291 | $14.92 | $854,782 | Sale | SEC |
| 2024-01-08 | Moore Paul Andrew | Officer | 9,799 | $10.79 | $105,693 | Sale | SEC |
| 2024-01-08 | Galbraith Kenneth | CEO | 23,904 | $10.79 | $257,830 | Sale | SEC |
| 2024-01-08 | Astle Christopher | CFO | 5,994 | $10.79 | $64,652 | Sale | SEC |
Compiled automatically from public SEC filings. Not investment advice. Get every new insider purchase in the daily report.
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