Who owns CytomX Therapeutics, Inc.?
Institutional ownership of CTMX from SEC Form 13F filings across 120 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
120
13F holders
$490.3M
value, 2026 filers
60.1%
of shares outstanding (130.9M sh)
37
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of CTMX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 32.7M | $122.7M | 0.0% | 15% | +2.4% |
| 2 | BlackRock, Inc. | 17.6M | $65.8M | 0.0% | 8.1% | +235.9% |
| 3 | BANK OF AMERICA CORP /DE/ | 15.1M | $56.6M | 0.0% | 6.9% | +47.8% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 8.5M | $32.0M | 0.0% | 3.9% | -51.2% |
| 5 | Point72 Asset Management, L.P. | 7.8M | $29.3M | 0.0% | 3.6% | -0.8% |
| 6 | WELLINGTON MANAGEMENT GROUP LLP | 5.2M | $19.4M | 0.0% | 2.4% | +44.3% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 4.7M | $17.5M | 0.0% | 2.1% | +126.4% |
| 8 | TWO SIGMA INVESTMENTS, LP | 4.1M | $15.5M | 0.0% | 1.9% | +52.5% |
| 9 | UBS Group AG | 3.5M | $13.0M | 0.0% | 1.6% | +11.2% |
| 10 | CITADEL ADVISORS LLC | 3.1M | $11.7M | 0.0% | 1.4% | -42.5% |
| 11 | MARSHALL WACE, LLP | 3.0M | $11.3M | 0.0% | 1.4% | -26.9% |
| 12 | Woodline Partners LP | 2.0M | $7.7M | 0.0% | 0.9% | -49.0% |
| 13 | GOLDMAN SACHS GROUP INC | 2.0M | $7.5M | 0.0% | 0.9% | +37.3% |
| 14 | Qube Research & Technologies Ltd | 1.8M | $6.8M | 0.0% | 0.8% | -18.9% |
| 15 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.8M | $6.6M | 0.0% | 0.8% | +120.3% |
| 16 | MILLENNIUM MANAGEMENT LLC | 1.7M | $6.3M | 0.0% | 0.8% | -53.9% |
| 17 | NORTHERN TRUST CORP | 1.7M | $6.3M | 0.0% | 0.8% | +173.7% |
| 18 | TUDOR INVESTMENT CORP ET ALNEW | 1.4M | $5.2M | 0.0% | 0.6% | new |
| 19 | VANGUARD FIDUCIARY TRUST CO | 1.3M | $4.8M | 0.0% | 0.6% | +14.9% |
| 20 | GILDER GAGNON HOWE & CO LLC | 704,423 | $2.6M | 0.0% | 0.3% | -37.1% |
| 21 | Bank of New York Mellon Corp | 684,539 | $2.6M | 0.0% | 0.3% | +136.2% |
| 22 | DEUTSCHE BANK AG\ | 663,038 | $2.5M | 0.0% | 0.3% | +43.1% |
| 23 | FIRST TRUST ADVISORS LP | 599,696 | $2.2M | 0.0% | 0.3% | +5.5% |
| 24 | Sixth Street Partners Management Company, L.P.NEW | 549,875 | $2.1M | 0.4% | 0.3% | new |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 549,875 | $2.1M | 0.0% | 0.3% | +326.9% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.