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EcoR1 Capital, LLC

Position in ZYME — Zymeworks Inc.

CIK 1587114 San Francisco, CA

Position in ZYME

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$575,178,515
-$29,631,801 QoQ
Shares Held
22,970,388
0.0% QoQ
Ownership
31.5%
of shares outstanding
% of Portfolio
26.21%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Dec 2022
14 quarters on record
Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in ZYME Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Mar 31, 2026

EcoR1 Capital, LLC holds $2,138,560,039 across 26 Biotechnology names. ZYME ranks #1 (26.9% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 ZYME
Zymeworks Inc.
This page
22,970,388 $575,178,515

All Filings in ZYME

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21 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $575,178,515 22,970,388
2025-12-31 $604,810,316 22,970,388
2025-11-16 $425,411,585 22,970,388
2025-09-30 $392,334,227 22,970,388
2025-06-30 $288,278,369 22,970,388
2025-06-26 $284,143,699 22,970,388
2025-04-04 $193,812,525 17,699,774
2025-03-31 $205,561,216 17,259,548
2025-03-13 $211,573,145 16,858,418
2025-02-17 $235,959,616 15,720,161
2025-01-10 $203,734,451 15,411,078
2024-12-31 $220,011,076 15,028,079
2024-12-19 $199,521,175 14,692,281
2024-09-30 $168,640,286 13,437,473
2024-06-30 $114,352,895 13,437,473
2024-03-31 $141,362,215 13,437,473
2023-12-31 $139,615,344 13,437,473
2023-09-30 $85,193,578 13,437,473
2023-06-30 $116,099,766 13,437,473
2023-03-31 $91,190,755 10,087,473
2022-12-31 $59,488,983 7,568,573