Galbraith Kenneth, Chair and CEO of Zymeworks Inc. ($ZYME), sold shares on the open market four times in the last 365 days for a total of $3.34 million. His most recent sale occurred on January 12, 2026. These ZYME insider sales rank 2,530th among nearly 12,000 individual insiders, below the average sale amount of $8.6 million across 6.4 transactions. Kenneth made no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 12, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | S | Common Stock | 30424 | $22.67 | 226,842.0000 | 75,775,214 | 11.83% | 0.04% |
| Jan. 12, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Common Stock | 64000 | $0.00 | 257,266.0000 | 75,775,214 | 33.11% | 0.08% |
| Jan. 12, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | A | Performance Stock Unit | 222000 | $0.00 | 222,000.0000 | 75,775,214 | 9999.99% | 0.29% |
| Jan. 12, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | A | Restricted Stock Unit | 144000 | $0.00 | 144,000.0000 | 75,775,214 | 9999.99% | 0.19% |
| Jan. 12, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | A | Stock Option (Right to Buy) | 216000 | $0.00 | 216,000.0000 | 75,775,214 | 9999.99% | 0.29% |
| Jan. 12, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Restricted Stock Unit | 64000 | $0.00 | 128,000.0000 | 75,775,214 | 33.33% | 0.08% |
| Jan. 5, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Common Stock | 66666 | $0.00 | 224,952.0000 | 75,775,214 | 42.12% | 0.09% |
| Jan. 5, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Common Stock | 47668 | $0.00 | 180,943.0000 | 75,775,214 | 35.77% | 0.06% |
| Jan. 5, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Restricted Stock Unit | 66666 | $0.00 | 66,668.0000 | 75,775,214 | 50.00% | 0.09% |
| Jan. 5, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Restricted Stock Unit | 47668 | $0.00 | 0.0000 | 75,775,214 | 100.00% | 0.06% |
| Jan. 5, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | S | Common Stock | 31686 | $25.10 | 193,266.0000 | 75,775,214 | 14.09% | 0.04% |
| Jan. 5, 2026 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | S | Common Stock | 22657 | $25.10 | 158,286.0000 | 75,775,214 | 12.52% | 0.03% |
| Dec. 22, 2025 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Restricted Stock Unit | 100000 | $0.00 | 0.0000 | 75,775,214 | 100.00% | 0.13% |
| Dec. 22, 2025 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Common Stock | 100000 | $0.00 | 180,803.0000 | 75,775,214 | 123.76% | 0.13% |
| Dec. 22, 2025 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | S | Common Stock | 47528 | $27.02 | 133,275.0000 | 75,775,214 | 26.29% | 0.06% |
| Jan. 10, 2025 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | A | Stock Option (Right to Buy) | 288000 | $0.00 | 288,000.0000 | 75,878,738 | 9999.99% | 0.38% |
| Jan. 10, 2025 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | A | Restricted Stock Unit | 192000 | $0.00 | 192,000.0000 | 75,878,738 | 9999.99% | 0.25% |
| Jan. 6, 2025 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Common Stock | 47666 | $0.00 | 71,428.0000 | 75,878,738 | 200.60% | 0.06% |
| Jan. 6, 2025 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | S | Common Stock | 23885 | $14.92 | 47,543.0000 | 75,878,738 | 33.44% | 0.03% |
| Jan. 6, 2025 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Restricted Stock Unit | 66666 | $0.00 | 133,334.0000 | 75,878,738 | 33.33% | 0.09% |
| Jan. 6, 2025 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Restricted Stock Unit | 47666 | $0.00 | 47,668.0000 | 75,878,738 | 50.00% | 0.06% |
| Jan. 6, 2025 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | S | Common Stock | 33406 | $14.92 | 80,803.0000 | 75,878,738 | 29.25% | 0.04% |
| Jan. 6, 2025 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Common Stock | 66666 | $0.00 | 114,209.0000 | 75,878,738 | 140.22% | 0.09% |
| Jan. 5, 2024 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Common Stock | 47666 | $0.00 | 47,666.0000 | 68,863,010 | 9999.99% | 0.07% |
| Jan. 5, 2024 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | A | Restricted Stock Unit | 200000 | $0.00 | 200,000.0000 | 68,863,010 | 9999.99% | 0.29% |
| Jan. 5, 2024 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | A | Stock Option (Right to Buy) | 300000 | $0.00 | 300,000.0000 | 68,863,010 | 9999.99% | 0.44% |
| Jan. 5, 2024 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | M | Restricted Stock Unit | 47666 | $0.00 | 95,334.0000 | 68,863,010 | 33.33% | 0.07% |
| Jan. 8, 2024 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | S | Common Stock | 5706 | $11.22 | 23,762.0000 | 68,863,010 | 19.36% | 0.01% |
| Jan. 5, 2024 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | S | Common Stock | 18198 | $10.65 | 29,468.0000 | 68,863,010 | 38.18% | 0.03% |
| Jan. 5, 2023 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | A | Restricted Stock Unit | 143000 | $0.00 | 143,000.0000 | 65,249,184 | 9999.99% | 0.22% |
| Jan. 5, 2023 | Zymeworks Inc. | $ZYME | Galbraith Kenneth | Chair & CEO | A | Stock Option (Right to Buy) | 215000 | $0.00 | 215,000.0000 | 65,249,184 | 9999.99% | 0.33% |