CYTOMX THERAPEUTICS INC. (CTMX) is held by 98 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is FMR LLC as of Q1 2026.

Are institutions buying or selling CTMX?

In Q1 2026, 81 institutions opened or increased positions in CYTOMX THERAPEUTICS INC. while 18 reduced or exited — a net buying quarter.

What is the Smart Money Verdict on CTMX?

The Smart Money Verdict combines four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for CYTOMX THERAPEUTICS INC..

How many hedge funds hold CTMX?

98 institutional investors report holding CYTOMX THERAPEUTICS INC. (CTMX) as of Q1 2026, based on SEC 13F filings.

Is institutional money flowing into CTMX?

As of Q1 2026, tracked institutions in CYTOMX THERAPEUTICS INC. show 81 buyers versus 18 sellers — net inflows.

CYTOMX THERAPEUTICS INC.

CTMX·23284F105·US·Common Stock·Healthcare - Biotechnology-13D/G

Holders

Avg rating(14 Elite)

$599.6M

Total Value

82% (103)

Fund Consensus

81 buying - 18 selling

Smart Money Verdict

View all

Held by 98 funds

14 elite

Who's Trading

ActivistPAPerceptive Advisors LLC4.6%May 15, 2026

ActivistVHVenrock Healthcare Capital Partners III, L.P.4.6%May 15, 2026

ActivistKYKynam Capital Management, LP6.9%May 15, 2026

ActivistPGPatrick G. Enright7.0%May 15, 2026

ActivistSFSeven Fleet Master Fund LP0.5%May 15, 2026

Activist

Point72 Asset Management, L.P.5.0%Apr 16, 2026

InsiderMAMcCarthy Sean A.Sell $764KMar 17, 2026

InsiderBMBELVIN MARCIASell $202KMar 17, 2026

InsiderOCOgden ChristopherSell $124KMar 17, 2026

InsiderCYChu Yu-WayeSell $137KMar 17, 2026

View all insider trades View all activist filings

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
FMR LLC	Increased	32M(+29.4%)	$150.2M	0.0%	+5.25%	38
BANK OF AMERICA CORP /DE/	Increased	10.2M(+1064.3%)	$48M	0.0%	-19.54%	47
VAVANGUARD CAPITAL MANAGEMENT LLC	New	8.7M	$41M	0.0%	-21.83%	40
Point72 Asset Management, L.P.	Increased	7.9M(+51.8%)	$37M	0.0%	+17.99%	40
STATE STREET CORP	Increased	5.7M(+10.2%)	$26.6M	0.0%	-5.02%	32
CITADEL ADVISORS LLC	Increased	5.4M(+1479.3%)	$25.4M	0.0%	-20.12%	46
BlackRock, Inc.	Increased	5.2M(+42.5%)	$24.6M	0.0%	+17.13%	38
BAKER BROS. ADVISORS LP	Increased	5M(+17.1%)	$23.4M	0.1%	+35.54%	40
MWMARSHALL WACE, LLP	Increased	4.1M(+257.7%)	$19.4M	0.0%	-8.35%	46
MILLENNIUM MANAGEMENT LLC	Increased	3.7M(+1163.7%)	$17.2M	0.0%	-19.32%	46
WELLINGTON MANAGEMENT GROUP LLP	New	3.6M	$16.8M	0.0%	-21.83%	39
UBS Group AG	Increased	3.1M(+741.6%)	$14.7M	0.0%	-20.03%	45
Jefferies Financial Group Inc.	Increased	3.1M(+128x)	$14.4M	0.1%	-21.63%	45
TWO SIGMA INVESTMENTS, LP	Increased	2.7M(+73.6%)	$12.7M	0.0%	-8.30%	42
Qube Research & Technologies Ltd	Increased	2.2M(+112.0%)	$10.6M	0.0%	-15.56%	45
GEODE CAPITAL MANAGEMENT, LLC	Increased	2.1M(+35.5%)	$9.7M	0.0%	-23.89%	36
Woodline Partners LP	Decreased	2M(-14.4%)	$9.4M	0.0%	+241.45%	0
DIMENSIONAL FUND ADVISORS LP	Increased	1.9M(+49.7%)	$9.1M	0.0%	-7.52%	38
SUSQUEHANNA INTERNATIONAL GROUP, LLP	Increased	1.9M(+90.5%)	$8.8M	0.0%	-10.07%	43
GOLDMAN SACHS GROUP INC	Decreased	1.5M(-40.7%)	$6.9M	0.0%	-5.42%	0