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CytomX Therapeutics, Inc.

CTMX Net selling
CIK 0001501989 #2811 in the set updated 21 Sep 2026
Bought (120 mo)
$100.72K
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$52.84M
$1.23M on a plan · $10.78M straight out of an exercise
Sold at will
$40.83M
91 of 146 sales
Net
−$52.73M
−$40.73M against sales at will

By person

25 insiders · 165 transactions
Insider
Role
Bought
Sold
Net
Holding
Worth
Change
THIRD ROCK VENTURES LP entity
10% owner
$28.70M (2)
−$28.70M
85,509
$260.80K
−98.4%
McCarthy Sean A.
CEO
$8.58M (40) scheduled
−$8.58M
2,159,971
$6.59M
+104.8%
Canaan IX L.P.
Director
$3.42M (14)
−$3.42M
2,494,381
$7.61M
−41.2%
SHANNON TIMOTHY M
Director
$3.42M (14)
−$3.42M
3,244,829
$9.90M
−8.5%
RAY DEBANJAN
Chief Financial Officer
$1.98M (21) scheduled
−$1.98M
5,928
$18.08K
−73.0%
GLUCK FREDERICK W
Director
$1.52M (8)
−$1.52M
289,154
$881.92K
−19.0%
TEPPER ROBERT I
10% owner
$1.20M (3)
−$1.20M
4,349,864
$13.27M
−1.4%
HUMPHREY RACHEL
Chief Medical Officer
$1.20M (2) scheduled
−$1.20M
30,234
$92.21K
Kavanaugh William Michael
CSO, Head Res.&Non-Clin. Dev.
$1.18M (1) scheduled
−$1.18M
81,332
$248.06K
+6.7%
STARR KEVIN P
10% owner
$463.79K (1)
−$463.79K
5,201,767
$15.87M
−0.5%
Goeltz II Robert C.
Chief Financial Officer
$426.34K (2) scheduled
−$426.34K
32,756
$99.91K
+1,538%
BELVIN MARCIA
SVP, Chief Scientific Officer
$294.10K (7)
−$294.10K
300,760
$917.32K
+250.5%
Ogden Christopher
Chief Financial Officer
$179.97K (9)
−$179.97K
295,324
$900.74K
+1,431%
Chu Yu-Waye
Chief Medical Officer
$139.09K (2)
−$139.09K
189,446
$577.81K
ROWLAND LLOYD A
General Counsel
$92.97K (1)
$47.00K (7)
+$45.97K
120,594
$367.81K
+483.8%
Landau Jeffrey B
Chief Business Officer
$38.71K (6)
−$38.71K
119,056
$363.12K
+315.1%
Peterson Amy C.
EVP, Chief Development Officer
$19.04K (2)
−$19.04K
58,433
$178.22K
+1,466%
Campoy Carlos
Chief Financial Officer
$9.08K (2)
−$9.08K
38,224
$116.58K
HANNAH ALISON L.
Chief Medical Officer
$7.97K (1)
−$7.97K
31,898
$97.29K
Jones Elaine V
Director
$7.75K (1)
+$7.75K
5,142
$15.68K
+3,521%
Exter Neil
Director
(2)
$0.00
11,199
$34.16K
0.0%
BVF PARTNERS L P/IL entity
See Explanation of Responses
358,450
$1.09M
0.0%
Carvajal Alejandra
Chief Legal Officer
100,000
$305.00K
Lester Rachael
Chief Business Officer
20,000
$61.00K
Knifsend Robin
Principal Accounting Officer
2,791
$8.51K
+185.1%

No percentages here. This company's share count has moved by a factor of 2.8 over the window, from 78,258,879 to 217,899,284 shares. A split, a merger or a large issue changes what the company is, and a holding measured at one point in that run is not a fraction of it at another.

Insider
Date
Role
Action
Shares
Price
Amount
McCarthy Sean A.
17 Mar 2026
CEO
Sold on a plan
118,969
$6.42
$764.14K
McCarthy Sean A.
6 Nov 2025
CEO
Sold on a plan
101,793
$4.54
$461.91K

What was left out

Form 4 filings counted 315
Amendments (4/A) skipped 4
Filings about a different issuer 0
Unreadable filings 0
Joint filings 15
Sales on a Rule 10b5-1 plan 2
Sales straight out of an exercise 53
Sales at will 91
Transactions with no price 0
Shares from compensation/vesting 8,736,272
Sales filed before the plan box existed 59
History held since 28 Sep 2016