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ZYME · Zymeworks Inc.

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$29.19 -0.71 (-2.37%) At close · Sep 4
Market Cap
$2.11B
Shares
70.96M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 204
Total Value: $1,793,723,727
Total Shares: 68,638,520
Showing 1–100 of 206 holdings by value · page 1 of 3

Institutional Ownership Trend

16 quarters

Holder Concentration

Across 204 13F filers · Δ vs Mar 31, 2026
Top Holder
33.5%
Sep 2023 → Jun 2026 · range 19.7% – 33.5%
+1.0 pts
Top 5
61.3%
Sep 2023 → Jun 2026 · range 48.2% – 61.3%
+2.3 pts
Top 10
72.9%
Sep 2023 → Jun 2026 · range 66.9% – 72.9%
+1.9 pts
HHI
1,375
Sep 2023 → Jun 2026 · range 704 – 1,375
Broadly held+80

Quarterly Activity

vs Mar 31, 2026
New
25
Increased
61
Decreased
74
Sold Out
36
Unchanged
44
Holder count: -11
Institutional value: +1.2%
Shares held: -3.0%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 206
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1937653 CUSIP 98985Y108 13F (30d) 158 filings 157 filers Visit website Investor relations