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buyModerate

EcoR1 Capital, LLC bought $1.2M of ZYME

director, owner at Zymeworks Inc.. 97,349 shares at an average of $12.61, traded Mar 25, 2025, filed Mar 27, 2025.

Conviction score
44
Value
$1.2M
97,349 shares
Holdings after
17,255,151
+1% from before
From 52-week low
+15%
low $11.10, close $12.80
From 52-week high
-26%
high $17.40, as of Mar 25, 2025

Score components

  • Role
    Director
    +15
  • Trade size
    $1.2M at market
    +25
  • Relative to holdings
    Under 1% of holdings (0.6%)
    -5
  • Price context
    26% below the 52-week high
    +4
  • Cluster
    No other insider buying within 14 days
    0
  • Repeat buying
    8 buys in 90 days
    +5
  • Track record
    Too few past buys to judge (0 with prices)
    0

What happened after comparable buys

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

ZYMEOct 9, 2026 · close 25.79
Since filing Mar 27, 2025: +106.2%SPY +39.6% · excess +66.6%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0000935836-25-000253, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Mar 25, 2025POpen-market purchase
Common Stockindirect: See Note
+53,501$12.91$690k17,211,303Mar 27, 2025
Mar 26, 2025POpen-market purchase
Common Stockindirect: See Note
+43,848$12.24$537k17,255,151Mar 27, 2025

Related signals

Other insiders at Zymeworks Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
25Weak
ZYMEsell
Zymeworks Inc.
Adam Schayowitz
EVP, Head of R&D
$358k
13,832 shares
-37%
43Moderate
ZYMEbuy
Zymeworks Inc.
EcoR1 Capital, LLC
director, owner
$636k
55,421 shares
+0%
48Moderate
ZYMEbuy
Zymeworks Inc.
EcoR1 Capital, LLC
director, owner
$1.5M
128,713 shares
+1%
63Notable
ZYMEbuy
Zymeworks Inc.
EcoR1 Capital, LLC
director, owner
$3.6M
317,208 shares
+2%
58Moderate
ZYMEbuy
Zymeworks Inc.
EcoR1 Capital, LLC
director, owner
$1.5M
127,415 shares
+1%
44Moderate
ZYMEbuy
Zymeworks Inc.
EcoR1 Capital, LLC
director, owner
$1.6M
127,198 shares
+1%
49Moderate
ZYMEbuy
Zymeworks Inc.
EcoR1 Capital, LLC
director, owner
$2.9M
228,463 shares
+1%
66Notable
ZYMEbuy
Zymeworks Inc.
EcoR1 Capital, LLC
director, owner
$13M
1,081,980 shares
+7%
44Moderate
ZYMEbuy
Zymeworks Inc.
EcoR1 Capital, LLC
director, owner
$2.0M
141,429 shares
+1%
49Moderate
ZYMEbuy
Zymeworks Inc.
EcoR1 Capital, LLC
director, owner
$2.3M
167,654 shares
+1%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

EcoR1 Capital, LLC bought $1.2M of ZYME | InsiderTell