Sean A. McCarthy

CIK: 0001654058

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)4 (36.4%)

Position reduction

Option Exercises (M)2 (18.2%)

Derivative conversions

Awards (A)5 (45.5%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

CTMX

CytomX Therapeutics, Inc.

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (11 total)

CTMX
CytomX Therapeutics, Inc.
Mar 17, 2026
Sale(S)
Direct
119K shares at avg. $6.42$764K
CTMX
CytomX Therapeutics, Inc.
Feb 2, 2026
Award(A)
Direct
210K shares-
CTMX
CytomX Therapeutics, Inc.
Nov 6, 2025
Exercise(M)
Direct
101.8K shares at avg. $1.59$162K
CTMX
CytomX Therapeutics, Inc.
Nov 6, 2025
Sale(S)
Direct
101.8K shares at avg. $4.54$462K
CTMX
CytomX Therapeutics, Inc.
Sep 26, 2025
Award(A)
Performance Stock Units (PSUs)
Direct
285K shares-
CTMX
CytomX Therapeutics, Inc.
Sep 26, 2025
Award(A)
Stock Option (Right to Buy)
Direct
570K shares-
CTMX
CytomX Therapeutics, Inc.
Jun 16, 2025
Sale(S)
Direct
55.5K shares at avg. $2.69$149K
CTMX
CytomX Therapeutics, Inc.
Jun 13, 2025
Exercise(M)
Direct
150K shares-
CTMX
CytomX Therapeutics, Inc.
Mar 18, 2025
Sale(S)
Direct
37.7K shares at avg. $0.60$23K
CTMX
CytomX Therapeutics, Inc.
Feb 4, 2025
Award(A)
Direct
180K shares-
CTMX
CytomX Therapeutics, Inc.
Feb 4, 2025
Award(A)
Direct
195K shares-

		Type	Shares	Price		Ownership
Mar 17, 2026	CTMX CytomX Therapeutics, Inc.	Sale(S)	118,969	$6.42	$764,138	Direct
Feb 2, 2026	CTMX CytomX Therapeutics, Inc.	Award(A)	210,000	-	$0	Direct
Nov 6, 2025	CTMX CytomX Therapeutics, Inc.	Exercise(M)	101,793	$1.59	$161,851	Direct
Nov 6, 2025	CTMX CytomX Therapeutics, Inc.	Sale(S)	101,793	$4.54	$461,906	Direct
Sep 26, 2025	CTMX CytomX Therapeutics, Inc.	Award(A) Performance Stock Units (PSUs)	285,000	-	-	Direct
Sep 26, 2025	CTMX CytomX Therapeutics, Inc.	Award(A) Stock Option (Right to Buy)	570,000	-	-	Direct
Jun 16, 2025	CTMX CytomX Therapeutics, Inc.	Sale(S)	55,511	$2.69	$149,264	Direct
Jun 13, 2025	CTMX CytomX Therapeutics, Inc.	Exercise(M)	150,000	-	-	Direct
Mar 18, 2025	CTMX CytomX Therapeutics, Inc.	Sale(S)	37,656	$0.60	$22,556	Direct
Feb 4, 2025	CTMX CytomX Therapeutics, Inc.	Award(A)	180,000	-	-	Direct
Feb 4, 2025	CTMX CytomX Therapeutics, Inc.	Award(A)	195,000	-	-	Direct

1-11 of 11 transactions

About McCarthy Sean A.

McCarthy Sean A. (SEC CIK 0001654058) files insider reports with the SEC as CEO of CytomX Therapeutics, Inc. (CTMX).

Signal8 holds 8 ownership filings by McCarthy Sean A., all Form 4s, filed between Feb 6, 2025 and Oct 16, 2026. Those filings report 11 transactions, from Feb 4, 2025 to Mar 17, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on McCarthy Sean A.'s filings is in EMERYVILLE, CA.

Recent filings by McCarthy Sean A.

Mar 17, 2026: Open-market sale of CTMX shares (Form 4, code S).
Feb 2, 2026: Grant or award of CTMX shares (Form 4, code A).
Nov 6, 2025: Option exercise of CTMX shares (Form 4, code M).
Nov 6, 2025: Open-market sale of CTMX shares (Form 4, code S).
Sep 26, 2025: Grants or awards of CTMX derivative securities (2 lines, Form 4, code A).

Other insiders filing for CytomX Therapeutics, Inc. (CTMX)

Carvajal Alejandra, Chief Legal Officer
Fuchs Charles S., Director
Su Zhen, Director
Young Matthew P., Director
Mohindru Mani, Director
Meyers James R, Director

How to read Form 4 transaction codes