How many institutional investors hold CTMX?

3 tracked institutional investors disclosed a position in CTMX (CYTOMX THERAPEUTICS INC) in their most recent 13F filing.

Who is the largest institutional holder of CTMX?

Steve Cohen, Point72 Asset Management, holds the largest disclosed position in CTMX, valued at $37M.

Where does this CTMX ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

CTMX — CYTOMX THERAPEUTICS INC

Name: CYTOMX THERAPEUTICS INC (CTMX) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

About CYTOMX THERAPEUTICS INC (CTMX)

CYTOMX THERAPEUTICS INC (CTMX) appears in the most recent 13F filings of 3 tracked institutional investors. The largest disclosed position is held by Steve Cohen (Point72 Asset Management), valued at $37M. Across recent filings, tracked investors recorded 2 new positions, 0 increased, 0 reduced, and 0 exited. All data sourced from SEC 13F filings.

Tracked investors reporting CTMX

Investor	Firm	Shares	Market value	% of portfolio	As of
Steve Cohen	Point72 Asset Management	7.9M	$37M	0.05%	Mar 31, 2026
Ken Griffin	Citadel Advisors	5.9M	$27.7M	0.00%	Mar 31, 2026
Izzy Englander	Millennium Management	3.7M	$17.2M	0.01%	Mar 31, 2026

Steve CohenMar 31, 2026
Point72 Asset Management
Shares
7.9M
Value
$37M
% Portfolio
0.05%
Ken GriffinMar 31, 2026
Citadel Advisors
Shares
5.9M
Value
$27.7M
% Portfolio
0.00%
Izzy EnglanderMar 31, 2026
Millennium Management
Shares
3.7M
Value
$17.2M
% Portfolio
0.01%

Recent activity

Investor	Action	Δ %	Current value	Filing date
Steve Cohen	New	—	$22.1M	Feb 17, 2026
Steve Cohen	New	—	$37M	May 15, 2026

Steve Cohen
New
$22.1MFeb 17, 2026
Steve Cohen
New
$37MMay 15, 2026

Frequently asked questions

How many institutional investors hold CTMX?: 3 tracked institutional investors disclosed a position in CTMX (CYTOMX THERAPEUTICS INC) in their most recent 13F filing.
Who is the largest institutional holder of CTMX?: Steve Cohen, Point72 Asset Management, holds the largest disclosed position in CTMX, valued at $37M.
Did institutional ownership of CTMX increase or decrease?: Across recent 13F filings, tracked investors recorded 2 new positions, 0 increased, 0 reduced, and 0 fully exited CTMX.
Where does this CTMX ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.