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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
Ogden Christopher
15 Jun 2026
Chief Financial Officer
Sell
1,624
$3.05
$4.95K
Ogden Christopher
17 Mar 2026
Chief Financial Officer
Sell
19,323
$6.42
$124.11K
BELVIN MARCIA
17 Mar 2026
SVP, Chief Scientific Officer
Sell
31,492
$6.42
$202.27K
McCarthy Sean A.
17 Mar 2026
CEO
Sold on a plan
118,969
$6.42
$764.14K
Chu Yu-Waye
17 Mar 2026
Chief Medical Officer
Sell
21,279
$6.42
$136.68K
McCarthy Sean A.
6 Nov 2025
CEO
Sold on a plan
101,793
$4.54
$461.91K
McCarthy Sean A.
16 Jun 2025
CEO
Sell
55,511
$2.69
$149.26K
BELVIN MARCIA
16 Jun 2025
SVP, Chief Scientific Officer
Sell
13,884
$2.69
$37.33K
Ogden Christopher
16 Jun 2025
Chief Financial Officer
Sell
10,614
$2.69
$28.54K
Ogden Christopher
13 Jun 2025
Chief Financial Officer
Sold after exercise
1,641
$2.95
$4.84K
BELVIN MARCIA
18 Mar 2025
SVP, Chief Scientific Officer
Sell
19,512
$0.60
$11.69K
ROWLAND LLOYD A
18 Mar 2025
General Counsel
Sell
10,203
$0.60
$6.11K
Chu Yu-Waye
18 Mar 2025
Chief Medical Officer
Sell
4,025
$0.60
$2.41K
Ogden Christopher
18 Mar 2025
Chief Financial Officer
Sell
8,551
$0.60
$5.12K
McCarthy Sean A.
18 Mar 2025
CEO
Sell
37,656
$0.60
$22.56K
McCarthy Sean A.
20 Aug 2024
CEO
Sold after exercise
13,898
$1.23
$17.08K
Ogden Christopher
20 Aug 2024
Chief Financial Officer
Sold after exercise
1,984
$1.23
$2.44K
ROWLAND LLOYD A
20 Aug 2024
General Counsel
Sold after exercise
4,181
$1.23
$5.14K
BELVIN MARCIA
20 Aug 2024
SVP, Chief Scientific Officer
Sold after exercise
4,181
$1.23
$5.14K
Landau Jeffrey B
20 Aug 2024
Chief Business Officer
Sold after exercise
4,181
$1.23
$5.14K
McCarthy Sean A.
26 Mar 2024
CEO
Exercised, kept
109,768
$1.57
$172.87K
Landau Jeffrey B
19 Mar 2024
Chief Business Officer
Sell
6,562
$2.09
$13.69K
BELVIN MARCIA
19 Mar 2024
SVP, Chief Scientific Officer
Sell
12,795
$2.09
$26.68K
Ogden Christopher
19 Mar 2024
SVP, Finance and Accounting
Sell
2,971
$2.09
$6.20K
McCarthy Sean A.
19 Mar 2024
CEO
Sell
20,223
$2.09
$42.18K
ROWLAND LLOYD A
19 Mar 2024
General Counsel
Sell
5,268
$2.09
$10.99K
Ogden Christopher
20 Dec 2023
SVP, Finance and Accounting
Sell
1,990
$1.38
$2.75K
ROWLAND LLOYD A
20 Dec 2023
General Counsel
Sell
4,077
$1.38
$5.63K
Landau Jeffrey B
20 Dec 2023
Chief Business Officer
Sell
4,077
$1.38
$5.63K
BELVIN MARCIA
20 Dec 2023
SVP, Chief Scientific Officer
Sell
4,077
$1.38
$5.63K
McCarthy Sean A.
20 Dec 2023
CEO
Sell
13,551
$1.38
$18.71K
ROWLAND LLOYD A
22 Sep 2023
General Counsel
Sell
5,486
$1.30
$7.14K
McCarthy Sean A.
22 Sep 2023
CEO
Sell
14,601
$1.30
$18.99K
Landau Jeffrey B
22 Sep 2023
Chief Business Officer
Sell
4,119
$1.30
$5.36K
BELVIN MARCIA
22 Sep 2023
SVP, Chief Scientific Officer
Sell
4,119
$1.30
$5.36K
McCarthy Sean A.
19 May 2023
CEO
Exercised, kept
16,535
$1.57
$26.04K
Jones Elaine V
29 Mar 2023
Director
Buy
5,000
$1.55
$7.75K
Peterson Amy C.
16 Mar 2023
EVP, Chief Development Officer
Sell
4,257
$1.98
$8.42K
Landau Jeffrey B
16 Mar 2023
Chief Financial Officer
Sell
1,477
$1.98
$2.92K
ROWLAND LLOYD A
16 Mar 2023
General Counsel
Sell
2,037
$1.98
$4.03K
Campoy Carlos
16 Mar 2023
Chief Financial Officer
Sell
1,748
$1.98
$3.46K
McCarthy Sean A.
16 Mar 2023
CEO
Sell
7,121
$1.88
$13.39K
Ogden Christopher
16 Mar 2023
SVP, Finance and Accounting
Sell
516
$1.98
$1.02K
Campoy Carlos
20 Jul 2022
Chief Financial Officer
Sell
3,949
$1.42
$5.62K
HANNAH ALISON L.
20 Jul 2022
Chief Medical Officer
Sell
5,602
$1.42
$7.97K
ROWLAND LLOYD A
20 Jul 2022
General Counsel
Sell
5,602
$1.42
$7.97K
McCarthy Sean A.
20 Jul 2022
President and CEO
Sell
14,911
$1.42
$21.21K
Landau Jeffrey B
20 Jul 2022
Chief Business Officer
Sell
4,206
$1.42
$5.98K
Peterson Amy C.
20 Jul 2022
EVP, Chief Development Officer
Sell
7,463
$1.42
$10.61K
McCarthy Sean A.
9 May 2022
President and CEO
Exercised, kept
24,189
$0.95
$22.86K
McCarthy Sean A.
9 May 2022
President and CEO
Exercised, kept
66,742
$0.95
$63.07K
McCarthy Sean A.
11 Aug 2021
President and CEO
Exercised, kept
92,113
$1.13
$104.45K
McCarthy Sean A.
16 Jun 2021
President and CEO
Sell indirect
100,000
$7.04
$704.47K
McCarthy Sean A.
14 Jun 2021
President and CEO
Exercised, kept
10
$0.95
$9.45
McCarthy Sean A.
14 Jun 2021
President and CEO
Exercised, kept
30
$1.13
$34.02
McCarthy Sean A.
31 Mar 2021
President and CEO
Sold after exercise
100,000
$7.49
$749.47K
McCarthy Sean A.
23 Dec 2020
President and CEO
Exercised, kept
100,000
$1.13
$113.39K
McCarthy Sean A.
21 Sep 2020
President and CEO
Exercised, kept
20,500
$6.61
$135.60K
McCarthy Sean A.
12 May 2020
President and CEO
Sold after exercise
36,000
$15.00
$540.00K
ROWLAND LLOYD A
4 Mar 2019
General Counsel
Buy
9,000
$10.33
$92.97K
RAY DEBANJAN
12 Dec 2018
Chief Financial Officer
Sold after exercise
3,000
$15.00
$45.00K
McCarthy Sean A.
2 Nov 2018
President and CEO
Sold after exercise
1,156
$15.01
$17.35K
McCarthy Sean A.
1 Nov 2018
President and CEO
Sold after exercise
5,270
$15.00
$79.05K
McCarthy Sean A.
1 Nov 2018
President and CEO
Sold after exercise
100
$15.01
$1.50K
RAY DEBANJAN
1 Nov 2018
Chief Financial Officer
Sold after exercise
3,000
$15.00
$45.00K
RAY DEBANJAN
1 Oct 2018
Chief Financial Officer
Sold after exercise
3,000
$18.46
$55.38K
McCarthy Sean A.
4 Sep 2018
President and CEO
Sold after exercise
13,052
$21.86
$285.34K
RAY DEBANJAN
4 Sep 2018
Chief Financial Officer
Sold after exercise
3,000
$22.39
$67.17K
RAY DEBANJAN
1 Aug 2018
Chief Financial Officer
Sold after exercise
3,000
$26.05
$78.15K
McCarthy Sean A.
5 Jul 2018
President and CEO
Sold after exercise
4,497
$25.06
$112.69K
McCarthy Sean A.
3 Jul 2018
President and CEO
Sold after exercise
2,028
$25.09
$50.88K
McCarthy Sean A.
2 Jul 2018
President and CEO
Sold after exercise
13,052
$23.42
$305.71K
RAY DEBANJAN
2 Jul 2018
Chief Financial Officer
Sold after exercise
3,000
$22.56
$67.68K
RAY DEBANJAN
1 Jun 2018
Chief Financial Officer
Sold after exercise
3,000
$25.93
$77.79K
McCarthy Sean A.
1 May 2018
President and CEO
Sold after exercise
19,578
$26.55
$519.74K
RAY DEBANJAN
1 May 2018
Chief Financial Officer
Sold after exercise
3,000
$26.52
$79.56K
RAY DEBANJAN
2 Apr 2018
Chief Financial Officer
Sold after exercise
3,000
$28.12
$84.36K
GLUCK FREDERICK W
26 Mar 2018
Director
Sell indirect
5,000
$31.93
$159.64K
RAY DEBANJAN
2 Mar 2018
Chief Financial Officer
Sold after exercise
1,944
$31.02
$60.29K
RAY DEBANJAN
2 Mar 2018
Chief Financial Officer
Sold after exercise
12,541
$30.41
$381.38K
RAY DEBANJAN
2 Mar 2018
Chief Financial Officer
Sold after exercise
5,515
$30.06
$165.78K
HUMPHREY RACHEL
2 Mar 2018
Chief Medical Officer
Sold after exercise
16,160
$30.00
$484.80K
GLUCK FREDERICK W
2 Mar 2018
Director
Sell indirect
16,181
$30.00
$485.47K
McCarthy Sean A.
1 Mar 2018
President and CEO
Sold after exercise
19,578
$29.43
$576.14K
RAY DEBANJAN
1 Mar 2018
Chief Financial Officer
Sold after exercise
13,000
$29.40
$382.24K
GLUCK FREDERICK W
28 Feb 2018
Director
Sell indirect
3,819
$30.00
$114.57K
HUMPHREY RACHEL
28 Feb 2018
Chief Medical Officer
Sold after exercise
23,840
$30.00
$715.20K
RAY DEBANJAN
1 Feb 2018
Chief Financial Officer
Sell
2,548
$26.69
$68.01K
GLUCK FREDERICK W
5 Jan 2018
Director
Sell indirect
10,000
$25.01
$250.08K
McCarthy Sean A.
5 Jan 2018
President and CEO
Sold after exercise
6,526
$25.01
$163.22K
RAY DEBANJAN
2 Jan 2018
Chief Financial Officer
Sell
2,500
$21.11
$52.78K
McCarthy Sean A.
2 Jan 2018
President and CEO
Sold after exercise
13,052
$21.04
$274.61K
GLUCK FREDERICK W
26 Dec 2017
Director
Sell indirect
5,000
$22.29
$111.43K
HUMPHREY RACHEL
15 Dec 2017
Chief Medical Officer
Exercised, kept
15,117
$6.61
$99.99K
Kavanaugh William Michael
8 Dec 2017
CSO, Head Res.&Non-Clin. Dev.
Exercised, kept
5,130
$1.57
$8.08K
McCarthy Sean A.
1 Dec 2017
President and CEO
Sold after exercise
14,340
$20.60
$295.40K
RAY DEBANJAN
1 Dec 2017
Chief Financial Officer
Sell
2,500
$20.58
$51.45K
RAY DEBANJAN
1 Nov 2017
Chief Financial Officer
Sell
2,500
$20.00
$50.00K
McCarthy Sean A.
1 Nov 2017
President and CEO
Sold after exercise
14,342
$19.86
$284.83K
TEPPER ROBERT I
4 Oct 2017
10% owner
Sell
24,777
$24.34
$603.07K
GLUCK FREDERICK W
4 Oct 2017
Director
Sell indirect
10,000
$24.27
$242.68K
Kavanaugh William Michael
4 Oct 2017
CSO, Head Res.&Non-Clin. Dev.
Sold after exercise
48,368
$24.34
$1.18M
McCarthy Sean A.
4 Oct 2017
President and CEO
Sold after exercise
19,120
$24.13
$461.37K
RAY DEBANJAN
2 Oct 2017
Chief Financial Officer
Sell
2,500
$18.10
$45.25K
McCarthy Sean A.
2 Oct 2017
President and CEO
Sold after exercise
9,562
$18.57
$177.57K
GLUCK FREDERICK W
26 Sep 2017
Director
Sell indirect
5,000
$17.30
$86.48K
TEPPER ROBERT I
19 Sep 2017
10% owner
Sell
20,000
$18.00
$360.00K
McCarthy Sean A.
1 Sep 2017
President and CEO
Sold after exercise
9,930
$17.32
$171.99K
RAY DEBANJAN
1 Sep 2017
Chief Financial Officer
Sell
2,500
$17.17
$42.93K
McCarthy Sean A.
31 Aug 2017
President and CEO
Sold after exercise
3,000
$17.51
$52.53K
McCarthy Sean A.
31 Aug 2017
President and CEO
Sold after exercise
15,756
$17.50
$275.73K
McCarthy Sean A.
9 Aug 2017
President and CEO
Sold after exercise
4,781
$15.00
$71.72K
RAY DEBANJAN
9 Aug 2017
Chief Financial Officer
Sell
2,500
$15.00
$37.50K
RAY DEBANJAN
3 Jul 2017
Chief Financial Officer
Sell
2,500
$15.47
$38.68K
McCarthy Sean A.
3 Jul 2017
President and CEO
Sold after exercise
4,781
$15.52
$74.20K
TEPPER ROBERT I
29 Jun 2017
10% owner
Sell
15,000
$16.00
$240.00K
McCarthy Sean A.
26 Jun 2017
President and CEO
Sold after exercise
4,481
$15.00
$67.22K
GLUCK FREDERICK W
26 Jun 2017
Director
Sell indirect
5,000
$14.61
$73.05K
McCarthy Sean A.
5 Jun 2017
President and CEO
Sold after exercise
300
$15.00
$4.50K
Goeltz II Robert C.
12 May 2017
Chief Financial Officer
Exercised, kept
9,987
$6.61
$66.06K
Goeltz II Robert C.
12 May 2017
Chief Financial Officer
Exercised, kept
9,980
$4.47
$44.64K
McCarthy Sean A.
1 May 2017
President and CEO
Sold after exercise
4,781
$15.70
$75.06K
STARR KEVIN P
12 Apr 2017
10% owner
Sell
28,357
$16.36
$463.79K
Goeltz II Robert C.
10 Apr 2017
Chief Financial Officer
Exercised, kept
3,000
$4.47
$13.42K
McCarthy Sean A.
4 Apr 2017
President and CEO
Sold after exercise
4,781
$17.50
$83.67K
McCarthy Sean A.
3 Apr 2017
President and CEO
Sold after exercise
4,781
$16.94
$80.99K
Exter Neil
27 Mar 2017
Director
Sell indirect
0
$0.00
$0.00
THIRD ROCK VENTURES LP
27 Mar 2017
10% owner
Sell
650,000
$18.00
$11.70M
Exter Neil
23 Mar 2017
Director
Sell indirect
0
$0.00
$0.00
THIRD ROCK VENTURES LP
23 Mar 2017
10% owner
Sell
1,000,000
$17.00
$17.00M
McCarthy Sean A.
20 Mar 2017
President and CEO
Sold after exercise
14,343
$19.60
$281.12K
Goeltz II Robert C.
20 Mar 2017
Chief Financial Officer
Sold after exercise
11,517
$20.00
$230.34K
Goeltz II Robert C.
20 Mar 2017
Chief Financial Officer
Sold after exercise
10,000
$19.60
$196.00K
Goeltz II Robert C.
9 Mar 2017
Chief Financial Officer
Exercised, kept
2,500
$4.47
$11.18K
McCarthy Sean A.
3 Mar 2017
President and CEO
Sold after exercise
14,343
$15.00
$215.15K
HUMPHREY RACHEL
28 Dec 2016
Chief Medical Officer
Exercised, kept
15,117
$6.61
$99.99K
Canaan IX L.P.
29 Nov 2016
Director
Sell indirect
22,086
$11.18
$247.01K
SHANNON TIMOTHY M
29 Nov 2016
Director
Sell indirect
22,086
$11.18
$247.01K
Canaan IX L.P.
28 Nov 2016
Director
Sell indirect
20,840
$11.33
$236.14K
SHANNON TIMOTHY M
28 Nov 2016
Director
Sell indirect
20,840
$11.33
$236.14K
Canaan IX L.P.
25 Nov 2016
Director
Sell indirect
6,729
$11.79
$79.34K
SHANNON TIMOTHY M
25 Nov 2016
Director
Sell indirect
6,729
$11.79
$79.34K
Canaan IX L.P.
23 Nov 2016
Director
Sell indirect
10,890
$11.84
$128.92K
SHANNON TIMOTHY M
23 Nov 2016
Director
Sell indirect
10,890
$11.84
$128.92K
Canaan IX L.P.
22 Nov 2016
Director
Sell indirect
42,550
$11.71
$498.08K
SHANNON TIMOTHY M
22 Nov 2016
Director
Sell indirect
42,550
$11.71
$498.08K
Canaan IX L.P.
21 Nov 2016
Director
Sell indirect
13,548
$11.72
$158.79K
SHANNON TIMOTHY M
21 Nov 2016
Director
Sell indirect
13,548
$11.72
$158.79K
Canaan IX L.P.
18 Nov 2016
Director
Sell indirect
12,805
$11.64
$149.08K
SHANNON TIMOTHY M
18 Nov 2016
Director
Sell indirect
12,805
$11.64
$149.08K
Canaan IX L.P.
17 Nov 2016
Director
Sell indirect
18,971
$11.50
$218.22K
SHANNON TIMOTHY M
17 Nov 2016
Director
Sell indirect
18,971
$11.50
$218.22K
Canaan IX L.P.
16 Nov 2016
Director
Sell indirect
18,517
$11.55
$213.95K
SHANNON TIMOTHY M
16 Nov 2016
Director
Sell indirect
18,517
$11.55
$213.95K
Canaan IX L.P.
15 Nov 2016
Director
Sell indirect
33,064
$11.48
$379.48K
SHANNON TIMOTHY M
15 Nov 2016
Director
Sell indirect
33,064
$11.48
$379.48K
Canaan IX L.P.
14 Nov 2016
Director
Sell indirect
23,744
$11.21
$266.06K
SHANNON TIMOTHY M
14 Nov 2016
Director
Sell indirect
23,744
$11.21
$266.06K
Canaan IX L.P.
11 Nov 2016
Director
Sell indirect
35,391
$11.20
$396.46K
SHANNON TIMOTHY M
11 Nov 2016
Director
Sell indirect
35,391
$11.20
$396.46K
Canaan IX L.P.
10 Nov 2016
Director
Sell indirect
27,135
$11.07
$300.39K
SHANNON TIMOTHY M
10 Nov 2016
Director
Sell indirect
27,135
$11.07
$300.39K
Canaan IX L.P.
9 Nov 2016
Director
Sell indirect
13,730
$11.03
$151.50K
SHANNON TIMOTHY M
9 Nov 2016
Director
Sell indirect
13,730
$11.03
$151.50K
Goeltz II Robert C.
29 Sep 2016
Chief Financial Officer
Exercised, kept
4,000
$4.47
$17.89K

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