CytomX Therapeutics, Inc. (CTMX) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-06-22

CytomX Therapeutics, Inc. (CTMX) has filed 8 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-22. 3 Form 8-K material event filings were reported by CTMX in the last 90 days. InsiderAlpha tracks every CTMX SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About CytomX Therapeutics, Inc. (CTMX)

SEC CIK	0001501989

90-Day SEC Filing Activity

Form 4 filings (90d)	8
Form 8-K filings (90d)	3
Latest Form 4 filing	2026-06-22

Recent CTMX Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-06-15	Ogden Christopher	Chief Financial Officer	S — Open-market sale	1.6K	$3.05	$5K	SEC
2026-03-17	Ogden Christopher	Chief Financial Officer	S — Open-market sale	19.3K	$6.42	$124K	SEC
2026-03-17	Chu Yu-Waye	Chief Medical Officer	S — Open-market sale	21.3K	$6.42	$137K	SEC
2026-03-17	McCarthy Sean A.	CEO	S — Open-market sale	119.0K	$6.42	$764K	SEC
2026-03-17	BELVIN MARCIA	SVP, Chief Scientific Officer	S — Open-market sale	31.5K	$6.42	$202K	SEC
2026-02-02	Lester Rachael	Chief Business Officer	A — Grant or award	20.0K	$0.00	—	SEC
2026-02-02	Chu Yu-Waye	Chief Medical Officer	A — Grant or award	75.0K	$0.00	—	SEC
2026-02-02	BELVIN MARCIA	SVP, Chief Scientific Officer	A — Grant or award	60.0K	$0.00	—	SEC
2026-02-02	Ogden Christopher	Chief Financial Officer	A — Grant or award	90.0K	$0.00	—	SEC
2026-02-02	McCarthy Sean A.	CEO	A — Grant or award	210.0K	$0.00	—	SEC

All transactions sourced from SEC EDGAR Form 4 filings for CytomX Therapeutics, Inc. (CTMX). Updated in real time as new filings are submitted to the SEC.

Most-Active CTMX Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
Ogden Christopher	1	$5K
Meyers James R	1	—
Mohindru Mani	1	—
Jones Elaine V	1	—
Gilbert Halley E	1	—

Recent CTMX Form 8-K Material Events

2026-06-22 — Item 5.02, 5.03, 5.07, 9.01 [SEC]
2026-06-03 — Item 1.01 [SEC]
2026-05-07 — Item 2.02, 9.01 [SEC]
2026-03-19 — Item 8.01, 9.01 · Financing · neutral [SEC]
CytomX Therapeutics completed a public equity offering on March 19, 2026, issuing 45,990,567 shares of common stock at $5.30 per share and 1,179,245 pre-funded warrants at $5.29999 per warrant. The company expects to raise approximately $234.4 million in net proceeds, which will
2026-03-16 — Item 2.02, 9.01 · Earnings · neutral [SEC]
CytomX Therapeutics reported its 2025 full-year financial results and provided a business update on March 16, 2026. The filing contains standard annual financial results disclosure without indication of beat, miss, or material guidance changes.

Recent Insider Filings

2026-06-22 — Su Zhen (Insider)
2026-06-22 — Young Matthew P. (Insider)
2026-06-22 — Mohindru Mani (Insider)
2026-06-22 — Meyers James R (Insider)
2026-06-22 — Gilbert Halley E (Insider)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in CTMX insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

CTMX Insider Trading — FAQ

What is the latest insider trade for CTMX?: CytomX Therapeutics, Inc. (CTMX) had 8 insider filings in the last 90 days, with the most recent on 2026-06-22. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying CTMX stock?: 0 insider purchases of CTMX were filed in the last 90 days.
How many insiders are selling CTMX stock?: 0 insider sales of CTMX were filed in the last 90 days.
Where can I see CTMX SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every CTMX SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

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