CTMX

CytomX Therapeutics, Inc.

Insider trading activity for CytomX Therapeutics, Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

-$5K

net selling

Bought(0 · 0 insiders): $0
Sold(1 · 1 insiders): $5K

Past 12 months

-$1.7M

net selling

Bought(0 · 0 insiders): $0
Sold(6 · 4 insiders): $1.7M

Transaction history

The 53 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Aug 3	Carvajal Alejandra	Chief Legal Officer	AGRANT◆	450,000	—	—	—	Open the original filing on SEC.gov
Aug 3	Carvajal Alejandra	Chief Legal Officer	AGRANT	100,000	—	—	—	Open the original filing on SEC.gov
Jul 24	Fuchs Charles S.	Director	AGRANT◆	118,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Su Zhen	Director	AGRANT◆	59,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Young Matthew P.	Director	AGRANT◆	59,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Mohindru Mani	Director	AGRANT◆	59,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Meyers James R	Director	AGRANT◆	59,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Gilbert Halley E	Director	AGRANT◆	59,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Jones Elaine V	Director	AGRANT◆	59,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Ashworth Alan	Director	AGRANT◆	59,000	—	—	—	Open the original filing on SEC.gov
Jun 15	Ogden Christopher	Chief Financial Officer	SSELL	1,624	$3.05	$5K	-0.5%	Open the original filing on SEC.gov
Mar 17	McCarthy Sean A.	CEO	SSELL◷	118,969	$6.42	$764.1K	-9.9%	Open the original filing on SEC.gov
Mar 17	Ogden Christopher	Chief Financial Officer	SSELL	19,323	$6.42	$124.1K	-6.1%	Open the original filing on SEC.gov
Mar 17	Chu Yu-Waye	Chief Medical Officer	SSELL	21,279	$6.42	$136.7K	-10.1%	Open the original filing on SEC.gov
Mar 17	Belvin Marcia	SVP, Chief Scientific…	SSELL	31,492	$6.42	$202.3K	-9.5%	Open the original filing on SEC.gov
Feb 2	Lester Rachael	Chief Business Officer	AGRANT◆	50,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Lester Rachael	Chief Business Officer	AGRANT◆	50,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Lester Rachael	Chief Business Officer	AGRANT	20,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Ogden Christopher	Chief Financial Officer	AGRANT◆	325,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Ogden Christopher	Chief Financial Officer	AGRANT	90,000	—	—	+39.8%	Open the original filing on SEC.gov
Feb 2	McCarthy Sean A.	CEO	AGRANT◆	980,000	—	—	—	Open the original filing on SEC.gov
Feb 2	McCarthy Sean A.	CEO	AGRANT	210,000	—	—	+21.3%	Open the original filing on SEC.gov
Feb 2	Chu Yu-Waye	Chief Medical Officer	AGRANT◆	300,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Chu Yu-Waye	Chief Medical Officer	AGRANT	75,000	—	—	+55.3%	Open the original filing on SEC.gov
Feb 2	Belvin Marcia	SVP, Chief Scientific…	AGRANT◆	250,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Belvin Marcia	SVP, Chief Scientific…	AGRANT	60,000	—	—	+22.0%	Open the original filing on SEC.gov
Nov 6, 2025	McCarthy Sean A.	CEO	SSELL◷	101,793	$4.54	$461.9K	-9.3%	Open the original filing on SEC.gov
Oct 20, 2025	Lester Rachael	Chief Business Officer	AGRANT◆	650,000	—	—	—	Open the original filing on SEC.gov
Sep 26, 2025	McCarthy Sean A.	CEO	AGRANT◆	285,000	—	—	—	Open the original filing on SEC.gov
Sep 26, 2025	McCarthy Sean A.	CEO	AGRANT◆	570,000	—	—	—	Open the original filing on SEC.gov
Sep 26, 2025	Ogden Christopher	Chief Financial Officer	AGRANT◆	39,150	—	—	—	Open the original filing on SEC.gov
Sep 26, 2025	Ogden Christopher	Chief Financial Officer	AGRANT◆	78,250	—	—	—	Open the original filing on SEC.gov
Sep 26, 2025	Chu Yu-Waye	Chief Medical Officer	AGRANT◆	43,750	—	—	—	Open the original filing on SEC.gov
Sep 26, 2025	Chu Yu-Waye	Chief Medical Officer	AGRANT◆	87,500	—	—	—	Open the original filing on SEC.gov
Sep 26, 2025	Belvin Marcia	SVP, Chief Scientific…	AGRANT◆	18,150	—	—	—	Open the original filing on SEC.gov
Sep 26, 2025	Belvin Marcia	SVP, Chief Scientific…	AGRANT◆	36,300	—	—	—	Open the original filing on SEC.gov
Jun 16, 2025	Ogden Christopher	Chief Financial Officer	SSELL	10,614	$2.69	$28.5K	-4.5%	Open the original filing on SEC.gov
Jun 16, 2025	McCarthy Sean A.	CEO	SSELL	55,511	$2.69	$149.3K	-4.9%	Open the original filing on SEC.gov
Jun 16, 2025	Belvin Marcia	SVP, Chief Scientific…	SSELL	13,884	$2.69	$37.3K	-4.9%	Open the original filing on SEC.gov
Jun 13, 2025	Ogden Christopher	Chief Financial Officer	MEXER◆	37,500	—	—	—	Open the original filing on SEC.gov
Jun 13, 2025	Ogden Christopher	Chief Financial Officer	MEXER	37,500	—	—	+18.8%	Open the original filing on SEC.gov
Jun 13, 2025	Ogden Christopher	Chief Financial Officer	SSELL	1,641	$2.95	$4.8K	-0.8%	Open the original filing on SEC.gov
Jun 13, 2025	McCarthy Sean A.	CEO	MEXER◆	150,000	—	—	—	Open the original filing on SEC.gov
Jun 13, 2025	McCarthy Sean A.	CEO	MEXER	150,000	—	—	+15.1%	Open the original filing on SEC.gov
Jun 13, 2025	Belvin Marcia	SVP, Chief Scientific…	MEXER◆	37,500	—	—	—	Open the original filing on SEC.gov
Jun 13, 2025	Belvin Marcia	SVP, Chief Scientific…	MEXER	37,500	—	—	+15.1%	Open the original filing on SEC.gov
Jun 11, 2025	Su Zhen	Director	AGRANT◆	38,000	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Young Matthew P.	Director	AGRANT◆	38,000	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Mohindru Mani	Director	AGRANT◆	38,000	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Meyers James R	Director	AGRANT◆	38,000	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Jones Elaine V	Director	AGRANT◆	38,000	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Gilbert Halley E	Director	AGRANT◆	38,000	—	—	—	Open the original filing on SEC.gov
Jun 11, 2025	Ashworth Alan	Director	AGRANT◆	38,000	—	—	—	Open the original filing on SEC.gov

AGRANT◆—

Carvajal Alejandra · Chief Legal…Aug 3

450,000 sh

AGRANT—

Carvajal Alejandra · Chief Legal…Aug 3

100,000 sh

AGRANT◆—

Fuchs Charles S. · DirectorJul 24

118,000 sh

AGRANT◆—

Su Zhen · DirectorJun 17

59,000 sh

AGRANT◆—

Young Matthew P. · DirectorJun 17

59,000 sh

AGRANT◆—

Mohindru Mani · DirectorJun 17

59,000 sh

AGRANT◆—

Meyers James R · DirectorJun 17

59,000 sh

AGRANT◆—

Gilbert Halley E · DirectorJun 17

59,000 sh

AGRANT◆—

Jones Elaine V · DirectorJun 17

59,000 sh

AGRANT◆—

Ashworth Alan · DirectorJun 17

59,000 sh

SSELL$5K

Ogden Christopher · Chief Financial…Jun 15

1,624 sh @ $3.05 · -0.5% own

SSELL◷$764.1K

McCarthy Sean A. · CEOMar 17

118,969 sh @ $6.42 · -9.9% own

SSELL$124.1K

Ogden Christopher · Chief Financial…Mar 17

19,323 sh @ $6.42 · -6.1% own

SSELL$136.7K

Chu Yu-Waye · Chief Medical…Mar 17

21,279 sh @ $6.42 · -10.1% own

SSELL$202.3K

Belvin Marcia · SVP, Chief Scienti…Mar 17

31,492 sh @ $6.42 · -9.5% own

AGRANT◆—

Lester Rachael · Chief Business…Feb 2

50,000 sh

AGRANT◆—

Lester Rachael · Chief Business…Feb 2

50,000 sh

AGRANT—

Lester Rachael · Chief Business…Feb 2

20,000 sh

AGRANT◆—

Ogden Christopher · Chief Financial…Feb 2

325,000 sh

AGRANT—

Ogden Christopher · Chief Financial…Feb 2

90,000 sh · +39.8% own

AGRANT◆—

McCarthy Sean A. · CEOFeb 2

980,000 sh

AGRANT—

McCarthy Sean A. · CEOFeb 2

210,000 sh · +21.3% own

AGRANT◆—

Chu Yu-Waye · Chief Medical…Feb 2

300,000 sh

AGRANT—

Chu Yu-Waye · Chief Medical…Feb 2

75,000 sh · +55.3% own

AGRANT◆—

Belvin Marcia · SVP, Chief Scienti…Feb 2

250,000 sh

AGRANT—

Belvin Marcia · SVP, Chief Scienti…Feb 2

60,000 sh · +22.0% own

SSELL◷$461.9K

McCarthy Sean A. · CEONov 6, 2025

101,793 sh @ $4.54 · -9.3% own

AGRANT◆—

Lester Rachael · Chief Business…Oct 20, 2025

650,000 sh

AGRANT◆—

McCarthy Sean A. · CEOSep 26, 2025

285,000 sh

AGRANT◆—

McCarthy Sean A. · CEOSep 26, 2025

570,000 sh

AGRANT◆—

Ogden Christopher · Chief Financial…Sep 26, 2025

39,150 sh

AGRANT◆—

Ogden Christopher · Chief Financial…Sep 26, 2025

78,250 sh

AGRANT◆—

Chu Yu-Waye · Chief Medical…Sep 26, 2025

43,750 sh

AGRANT◆—

Chu Yu-Waye · Chief Medical…Sep 26, 2025

87,500 sh

AGRANT◆—

Belvin Marcia · SVP, Chief Scienti…Sep 26, 2025

18,150 sh

AGRANT◆—

Belvin Marcia · SVP, Chief Scienti…Sep 26, 2025

36,300 sh

SSELL$28.5K

Ogden Christopher · Chief Financial…Jun 16, 2025

10,614 sh @ $2.69 · -4.5% own

SSELL$149.3K

McCarthy Sean A. · CEOJun 16, 2025

55,511 sh @ $2.69 · -4.9% own

SSELL$37.3K

Belvin Marcia · SVP, Chief Scienti…Jun 16, 2025

13,884 sh @ $2.69 · -4.9% own

MEXER◆—

Ogden Christopher · Chief Financial…Jun 13, 2025

37,500 sh

MEXER—

Ogden Christopher · Chief Financial…Jun 13, 2025

37,500 sh · +18.8% own

SSELL$4.8K

Ogden Christopher · Chief Financial…Jun 13, 2025

1,641 sh @ $2.95 · -0.8% own

MEXER◆—

McCarthy Sean A. · CEOJun 13, 2025

150,000 sh

MEXER—

McCarthy Sean A. · CEOJun 13, 2025

150,000 sh · +15.1% own

MEXER◆—

Belvin Marcia · SVP, Chief Scienti…Jun 13, 2025

37,500 sh

MEXER—

Belvin Marcia · SVP, Chief Scienti…Jun 13, 2025

37,500 sh · +15.1% own

AGRANT◆—

Su Zhen · DirectorJun 11, 2025

38,000 sh

AGRANT◆—

Young Matthew P. · DirectorJun 11, 2025

38,000 sh

AGRANT◆—

Mohindru Mani · DirectorJun 11, 2025

38,000 sh

AGRANT◆—

Meyers James R · DirectorJun 11, 2025

38,000 sh

AGRANT◆—

Jones Elaine V · DirectorJun 11, 2025

38,000 sh

AGRANT◆—

Gilbert Halley E · DirectorJun 11, 2025

38,000 sh

AGRANT◆—

Ashworth Alan · DirectorJun 11, 2025

38,000 sh

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

2 of 35 filings we hold were filed after the two-business-day deadline. The furthest past the deadline was 4 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Oct 20, 2025	Oct 28, 2025	Lester RachaelChief Business Officer	4days	—	Filing ↗
Jul 24	Jul 29	Fuchs Charles S.Director	1day	—	Filing ↗

Lester RachaelChief Business Officer

4days

Traded Oct 20, 2025 · filed Oct 28, 2025Filing ↗

Fuchs Charles S.Director

1day

Traded Jul 24 · filed Jul 29Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

More biotech & pharma companies

Other issuers in the same industry with insider filings on record.

Whole sector →