CytomX Therapeutics CTMX Institutional Ownership

NASDAQ CTMX

$3.61 -0.08 (-2.04%)

As of: Sep 4, 2026 · 12:51 PM EDT

Institutions by Trading Activity

180 Institutions

Increased 119 66.1%

Unchanged 28 15.6%

Reduced 33 18.3%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

97.54%

▼-11.46 pp QoQ

Shares Held by Institutions

213.55Mn

of 218.94Mn outstanding

▲+18.36% QoQ

Shares Outstanding

218.94Mn

5.39Mn held outside 13F filers

Institutional Investors

180

filed 13F for Jun 2026

▲+1 vs prior quarter

Net Shares Added (QoQ)

+33.13Mn

accumulated since last quarter

Value of Holdings

$785.85Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

CytomX Therapeutics, Inc. (NASDAQ:CTMX) showed up in the 13F filings of 180 institutional investors as of June 2026.

Collectively, these holders controlled 97.5% of CytomX Therapeutics's outstanding shares in June 2026, down from 109.0% in March 2026.
Their total shares held in CTMX increased 18.36% from the prior quarter, while the number of investors in CytomX Therapeutics increased 119.51% year over year.
Of these 180 holders, 119 added to their stakes in CytomX Therapeutics, 33 trimmed positions, and 28 made no changes.
Altogether, these fund groups held 213.55Mn shares in CTMX by June 2026, up by 33.13Mn shares quarter on quarter, and up 80.36Mn shares year over year.
FMR LLC leads ownership in CTMX with 32.71Mn shares as of June 30, 2026, equal to 14.94% of outstanding shares.
The largest buyers of CytomX Therapeutics for the quarter ending June 2026 were BlackRock, Inc. (12.33Mn), Kynam Capital Management, LP (6.69Mn), State Street Corp (6.08Mn), Bank Of America Corp /De/ (4.88Mn), GEODE CAPITAL MANAGEMENT, LLC (2.61Mn).
The biggest sellers of CytomX Therapeutics for the quarter ending June 2026 included Venrock Adviser, LLC (5.0Mn), CITADEL ADVISORS LLC (2.3Mn), MILLENNIUM MANAGEMENT LLC (1.97Mn), SUSQUEHANNA INTERNATIONAL GROUP, LLP (1.78Mn), MARSHALL WACE, LLP (1.11Mn).
CytomX Therapeutics's 10 largest shareholders as of June 2026 include FMR LLC (32.71Mn), Kynam Capital Management, LP (21.7Mn), BlackRock, Inc. (17.56Mn), Bank Of America Corp /De/ (15.08Mn), State Street Corp (11.75Mn), PERCEPTIVE ADVISORS LLC (10.44Mn), VANGUARD CAPITAL MANAGEMENT LLC (8.53Mn), Point72 Asset Management, L.P. (7.81Mn), WELLINGTON MANAGEMENT GROUP LLP (5.17Mn), Venrock Adviser, LLC (4.98Mn) per Business Quant data.

Form 13F Holdings

180 Institutional Holders

Report period 30 Jun, 2026

Total shares held 213.55Mn

Of outstanding 97.54%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	FMR LLC	0000315066	32,714,937	14.94%	▲759,300	+2.38%	$122.68Mn
2	Kynam Capital Management, LP	0001907884	21,703,093	9.91%	▲6,690,000	+44.56%	$81.39Mn
3	BlackRock, Inc.	0002012383	17,559,822	8.02%	▲12,331,542	+235.86%	$65.85Mn
4	Bank Of America Corp /De/	0000070858	15,082,617	6.89%	▲4,879,832	+47.83%	$56.56Mn
5	State Street Corp	0000093751	11,747,236	5.37%	▲6,083,828	+107.42%	$44.05Mn
6	PERCEPTIVE ADVISORS LLC	0001224962	10,439,185	4.77%	▲340,361	+3.37%	$39.15Mn
7	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	8,525,457	3.89%	▼207,661	-2.38%	$31.97Mn
8	Point72 Asset Management, L.P.	0001603466	7,811,033	3.57%	▼64,357	-0.82%	$29.29Mn
9	WELLINGTON MANAGEMENT GROUP LLP	0000902219	5,168,961	2.36%	▲1,585,976	+44.26%	$19.38Mn
10	Venrock Adviser, LLC	0001615982	4,982,124	2.28%	▼5,000,000	-50.09%	$18.68Mn
11	BAKER BROS. ADVISORS LP	0001263508	4,975,826	2.27%	0	0.00%	$18.66Mn
12	GEODE CAPITAL MANAGEMENT, LLC	0001214717	4,678,716	2.14%	▲2,612,104	+126.40%	$17.55Mn
13	Elmind Capital, LP	0002052213	4,550,000	2.08%	0	0.00%	$17.06Mn
14	Nextech Invest Ltd.	0001595430	4,449,932	2.03%	0	0.00%	$16.69Mn
15	TWO SIGMA INVESTMENTS, LP	0001179392	4,132,643	1.89%	▲1,422,487	+52.49%	$15.50Mn
16	Eversept Partners, LP	0001697013	3,558,497	1.63%	▲369,983	+11.60%	$13.34Mn
17	UBS Group AG	0001610520	3,468,359	1.58%	▲348,204	+11.16%	$13.01Mn
18	Siren, L.L.C.	0002005245	3,457,711	1.58%	0	0.00%	$12.97Mn
19	ADAR1 Capital Management, LLC	0001940272	3,365,118	1.54%	▼45,072	-1.32%	$12.62Mn
20	CITADEL ADVISORS LLC	0001423053	3,110,509	1.42%	▼2,295,684	-42.46%	$11.66Mn

Showing 1 to 20 of 180 holders