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Zymeworks stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+65.6% to $29.63
Zymeworks (ZYME) stock rose 66% over the last 252 sessions, to $29.63. On the way it reported 4 quarters, its insiders filed 8 open-market trades and 1 Form 144 notice of planned sales, and the company filed 7 material 8-Ks. Each is marked on the price and listed with what the stock did next.
Each mark, and what followed
| Date | Kind | What | Next session | 5 sessions | 21 sessions |
|---|---|---|---|---|---|
| Oct 23, 2026 | 8-K | Material definitive agreement | −0.8% (−0.3% vs SPY) | +0.9% (+0.2% vs SPY) | — |
| Oct 9, 2026 | Form 144 | Form 144: Adam Schayowitz plans to sell $349K | +2.1% (+1.5% vs SPY) | +1.9% (+2.2% vs SPY) | +16.0% (+21.1% vs SPY) |
| Sep 23, 2026 | 8-K | Material definitive agreement | −2.5% (−2.5% vs SPY) | −3.7% (−3.1% vs SPY) | +3.4% (+3.9% vs SPY) |
| Aug 6, 2026 | Earnings | Earnings: missed the EPS estimate by -4.8% | −1.6% (−1.4% vs SPY) | +5.9% (+5.6% vs SPY) | +24.1% (+23.7% vs SPY) |
| Jun 29, 2026 | 8-K | Material definitive agreement | −0.2% (−1.8% vs SPY) | +4.8% (+1.8% vs SPY) | −6.6% (−8.2% vs SPY) |
| May 7, 2026 | Earnings | Earnings: missed the EPS estimate by -484.3% | −3.7% (−3.4% vs SPY) | −11.7% (−12.8% vs SPY) | −13.8% (−14.4% vs SPY) |
| Apr 1, 2026 | 8-K | Directors and officers: departures, appointments, pay | +3.5% (+2.8% vs SPY) | +6.5% (+2.6% vs SPY) | +9.5% (−0.5% vs SPY) |
| Mar 2, 2026 | 8-K | Material definitive agreement | +0.1% (0.0% vs SPY) | +3.3% (+5.3% vs SPY) | +3.9% (+11.8% vs SPY) |
| Mar 2, 2026 | Earnings | Earnings: missed the EPS estimate by -70.6% | +0.1% (0.0% vs SPY) | +3.3% (+5.3% vs SPY) | +3.9% (+11.8% vs SPY) |
| Jan 12, 2026 | 8-K | Directors and officers: departures, appointments, pay | +3.2% (+3.4% vs SPY) | +2.2% (+4.7% vs SPY) | −1.4% (−1.0% vs SPY) |
| Jan 12, 2026 | Insider sale | Smith Jeffrey T L sold $211K | 0.0% (−0.2% vs SPY) | +1.3% (+1.6% vs SPY) | −1.9% (−1.6% vs SPY) |
| Jan 12, 2026 | Insider sale | Moore Paul Andrew sold $217K | 0.0% (−0.2% vs SPY) | +1.3% (+1.6% vs SPY) | −1.9% (−1.6% vs SPY) |
| Jan 12, 2026 | Insider sale | Hollywood Mark sold $139K | 0.0% (−0.2% vs SPY) | +1.3% (+1.6% vs SPY) | −1.9% (−1.6% vs SPY) |
| Jan 12, 2026 | Insider sale | Galbraith Kenneth sold $690K | 0.0% (−0.2% vs SPY) | +1.3% (+1.6% vs SPY) | −1.9% (−1.6% vs SPY) |
| Jan 5, 2026 | Insider sale | Smith Jeffrey T L sold $265K | −4.4% (−5.0% vs SPY) | −13.9% (−15.5% vs SPY) | −12.7% (−13.7% vs SPY) |
| Jan 5, 2026 | Insider sale | Moore Paul Andrew sold $505K | −4.4% (−5.0% vs SPY) | −13.9% (−15.5% vs SPY) | −12.7% (−13.7% vs SPY) |
| Jan 5, 2026 | Insider sale | Galbraith Kenneth sold $1.4M | −4.4% (−5.0% vs SPY) | −13.9% (−15.5% vs SPY) | −12.7% (−13.7% vs SPY) |
| Dec 22, 2025 | Insider sale | Galbraith Kenneth sold $1.3M | +1.4% (+0.8% vs SPY) | −1.8% (−2.9% vs SPY) | −14.5% (−15.7% vs SPY) |
| Nov 18, 2025 | 8-K | Directors and officers: departures, appointments, pay | −3.9% (−3.0% vs SPY) | +4.5% (+4.0% vs SPY) | +6.8% (+6.0% vs SPY) |
| Nov 6, 2025 | Earnings | Earnings: beat the EPS estimate by 17.8% | −0.8% (+0.3% vs SPY) | +7.1% (+6.2% vs SPY) | +39.1% (+37.9% vs SPY) |
Insiders’ record here
In the year on the chart, Zymeworks' insiders reported 0 open-market buys ($0) and 8 sales ($4.7M). Of the 8 old enough to score, 1 were followed by the stock doing what the trade implied over the next 63 sessions (beating SPY after a buy, lagging it after a sale); the median excess return after a buy was — and after a sale +16.6%.
Across the whole universe (19,782 scored trades), insider buys beat the market 46% of the time and sales were followed by a lagging stock 61% of the time; buys of $1M or more 39%. Every pattern →
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
| 1.01 Material definitive agreement | 23,525 | 0.0% | 51% | +1.0% | ±1.4% |
| 2.03 New debt or off-balance-sheet obligation | 13,268 | 0.0% | 50% | +1.2% | ±1.3% |
| 2.01 Completed acquisition or disposition | 2,671 | +0.1% | 52% | +1.2% | ±1.6% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Report card: every quarter against the estimate → Zymeworks: every quarter → Live insider trades →
Prices are daily closes; filings and trades are as filed with the SEC (Form 4 within two business days of the trade, 8-K within four of the event). Moves after a mark are the stock's close-to-close change and the same for SPY; they describe the record, not what the next one will do. Not investment advice.