13F Insight
DOSSIER · 13F Holders · Q1 2026
CTMX

CYTOMX THERAPEUTICS INC

182 institutions still hold CYTOMX THERAPEUTICS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 23284F105·182 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$678M
visible holders
Holders
182
filers reporting
Concentration
22.15%
FMR LLC #1
top holder share
AI Holders Summary · Q1 2026

Assenagon Asset Management held its 364,173-share cornerstone stake in CytomX Therapeutics completely firm during Q2 2026, commanding over 40% of the micro-cap biotech’s $3.38 million institutional roster. China Universal also expanded its holding by 17.4% ($35.9k flow).

Key Institutional Buyers

  • China Universal Asset Management: Added 9,579 shares (+17.4%, +$35.9k flow) to bring total holding to 64,647 shares ($242k).
  • Tema ETFs: Increased holding by 1,482 shares to 228,987 shares ($858k).
  • New Institutional Entrants: Police & Firemen’s Retirement System of NJ initiated a 52,499-share position ($197k), joined by PSP Research ($147k).

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
FMR LLC
CIK 0000315066
$150M32.0M0.01%Q1 202602
Kynam Capital Management, LP
CIK 0001907884
$71M15.0M4.35%Q1 202603
VR Adviser, LLC
CIK 0001615982
$66M15.6M3.27%Q4 202504
BANK OF AMERICA CORP /DE/
CIK 0000070858
$48M10.2M0.00%Q1 202605
PERCEPTIVE ADVISORS LLC
CIK 0001224962
$47M10.1M0.93%Q1 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$41M8.7M0.00%Q1 202607
Point72 Asset Management, L.P.
CIK 0001603466
$37M7.9M0.05%Q1 202608
STATE STREET CORP
CIK 0000093751
$27M5.7M0.00%Q1 202609
BlackRock, Inc.
CIK 0002012383
$25M5.2M0.00%Q1 202610
BAKER BROS. ADVISORS LP
CIK 0001263508
$18M4.3M0.11%Q4 202511
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$17M3.7M0.01%Q1 202612
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$17M3.6M0.00%Q1 202613
Siren, L.L.C.
CIK 0002005245
$16M3.5M0.45%Q1 202614
ADAR1 Capital Management, LLC
CIK 0001940272
$16M3.4M0.94%Q1 202615
Eversept Partners, LP
CIK 0001697013
$15M3.2M0.79%Q1 202616
UBS Group AG
CIK 0001610520
$15M3.1M0.00%Q1 202617
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$14M3.1M0.00%Q1 202618
Jefferies Financial Group Inc.
CIK 0000096223
$14M3.1M0.10%Q1 202619
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$13M2.7M0.01%Q1 202620
Qube Research & Technologies Ltd
CIK 0001729829
$11M2.2M0.01%Q1 2026
Page 1 of 10
162 more holders available. Log in →
Insiders at CYTOMX THERAPEUTICS INC
Ashworth Alan →Gilbert Halley E →Meyers James R →Mohindru Mani →Young Matthew P. →Su Zhen →Ogden Christopher →Belvin Marcia →