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CTMX · CytomX Therapeutics, Inc.

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$3.32 -0.05 (-1.48%) At close · Aug 26
Market Cap
$734.32M
Shares
217.90M

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: 179
Total Value: $805,105,133
Total Shares: 214,694,724

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 179 13F filers · Δ vs Mar 31, 2026
Top Holder
15.2%
Sep 2023 → Jun 2026 · range 10.4% – 20.3%
−0.9 pts
Top 5
46.0%
Sep 2023 → Jun 2026 · range 39.0% – 67.4%
+6.9 pts
Top 10
63.2%
Sep 2023 → Jun 2026 · range 56.0% – 81.9%
+7.2 pts
HHI
590
Sep 2023 → Jun 2026 · range 511 – 1,181
Broadly held+77

Quarterly Activity

vs Mar 31, 2026
New
47
Increased
69
Decreased
35
Sold Out
49
Unchanged
28
Holder count: -2
Institutional value: -13.3%
Shares held: +8.7%

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 186
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1501989 CUSIP 23284F105 13F (30d) 170 filings 166 filers Visit website Investor relations