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$CTMX

$3.95 +$0.19 (5.05%)

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Valuations P Insider Transactions P Congressional Trades P

Insider Transactions

Insider Transaction Summary

MARK J LEVIN

7,670,348 shares

Net: 0 B/S: -

KEVIN P STARR

3,320,348 shares

Net: 0 B/S: -

TIMOTHY M SHANNON

3,244,381 shares

Net: 0 B/S: -

Partners IX LLC Canaan

2,494,381 shares

Net: 0 B/S: -

Sean A. McCarthy

1,078,922 shares

Net: +559,238 B/S: 3.53

Harbor Master Investors (Cayman) L.P. Hadley

749,055 shares

Net: 0 B/S: -

Private Design Fund III, L.P. Deerfield

671,024 shares

Net: 0 B/S: -

MARCIA BELVIN

300,760 shares

Net: +64,808 B/S: 3.06

Christopher Ogden

296,948 shares

Net: +148,927 B/S: 8.71

Yu-Waye Chu

189,446 shares

Net: +141,221 B/S: 7.64

LLOYD A ROWLAND

120,594 shares

Net: 0 B/S: -

William Michael Kavanaugh

120,000 shares

Net: 0 B/S: -

Jeffrey B Landau

119,056 shares

Net: 0 B/S: -

RACHEL HUMPHREY

90,000 shares

Net: 0 B/S: -

DEBANJAN RAY

90,000 shares

Net: 0 B/S: -

CYNTHIA J LADD

84,000 shares

Net: 0 B/S: -

Amy C. Peterson

58,433 shares

Net: 0 B/S: -

Carlos Campoy

38,224 shares

Net: 0 B/S: -

Matthew P. Young

38,000 shares

Net: 0 B/S: -

Zhen Su

38,000 shares

Net: 0 B/S: -

Mani Mohindru

38,000 shares

Net: 0 B/S: -

James R Meyers

38,000 shares

Net: 0 B/S: -

Elaine V Jones

38,000 shares

Net: 0 B/S: -

Halley E Gilbert

38,000 shares

Net: 0 B/S: -

Alan Ashworth

38,000 shares

Net: 0 B/S: -

Robin Knifsend

34,000 shares

Net: 0 B/S: -

ALISON L. HANNAH

31,898 shares

Net: 0 B/S: -

ROBERT I TEPPER

29,516 shares

Net: 0 B/S: -

FREDERICK W GLUCK

25,000 shares

Net: 0 B/S: -

II Robert C. Goeltz

22,769 shares

Net: 0 B/S: -

JOHN A SCARLETT

20,000 shares

Net: 0 B/S: -

Charles S. Fuchs

20,000 shares

Net: 0 B/S: -

Rachael Lester

20,000 shares

Net: +670,000 B/S: ∞

Hoyoung Huh

14,000 shares

Net: 0 B/S: -

Marion McCourt

14,000 shares

Net: 0 B/S: -

Neil Exter

14,000 shares

Net: 0 B/S: -

Insider Name	Current Shares	Net Change (1yr)	Buy/Sell Ratio
MARK J LEVIN	7,670,348	0	-
KEVIN P STARR	3,320,348	0	-
TIMOTHY M SHANNON	3,244,381	0	-
Partners IX LLC Canaan	2,494,381	0	-
Sean A. McCarthy	1,078,922	+559,238	3.53
Harbor Master Investors (Cayman) L.P. Hadley	749,055	0	-
Private Design Fund III, L.P. Deerfield	671,024	0	-
MARCIA BELVIN	300,760	+64,808	3.06
Christopher Ogden	296,948	+148,927	8.71
Yu-Waye Chu	189,446	+141,221	7.64
LLOYD A ROWLAND	120,594	0	-
William Michael Kavanaugh	120,000	0	-
Jeffrey B Landau	119,056	0	-
RACHEL HUMPHREY	90,000	0	-
DEBANJAN RAY	90,000	0	-
CYNTHIA J LADD	84,000	0	-
Amy C. Peterson	58,433	0	-
Carlos Campoy	38,224	0	-
Matthew P. Young	38,000	0	-
Zhen Su	38,000	0	-
Mani Mohindru	38,000	0	-
James R Meyers	38,000	0	-
Elaine V Jones	38,000	0	-
Halley E Gilbert	38,000	0	-
Alan Ashworth	38,000	0	-
Robin Knifsend	34,000	0	-
ALISON L. HANNAH	31,898	0	-
ROBERT I TEPPER	29,516	0	-
FREDERICK W GLUCK	25,000	0	-
II Robert C. Goeltz	22,769	0	-
JOHN A SCARLETT	20,000	0	-
Charles S. Fuchs	20,000	0	-
Rachael Lester	20,000	+670,000	∞
Hoyoung Huh	14,000	0	-
Marion McCourt	14,000	0	-
Neil Exter	14,000	0	-

Individual Transactions

March 17, 2026

Yu-Waye Chu

Open Market Sale

Change: -21,279

Price: $6.42

Shares: 189,446

Value: -$136,675

Sean A. McCarthy

Open Market Sale

Change: -118,969

Price: $6.42

Shares: 1,078,922

Value: -$764,137

MARCIA BELVIN

Open Market Sale

Change: -31,492

Price: $6.42

Shares: 300,760

Value: -$202,273

Christopher Ogden

Open Market Sale

Change: -19,323

Price: $6.42

Shares: 296,948

Value: -$124,111

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Yu-Waye Chu	Mar 19	Open Market Sale (S) Market Sale	189,446	-21,279	$6.42	-$136,675
Sean A. McCarthy	Mar 19	Open Market Sale (S) Market Sale	1,078,922	-118,969	$6.42	-$764,137
MARCIA BELVIN	Mar 19	Open Market Sale (S) Market Sale	300,760	-31,492	$6.42	-$202,273
Christopher Ogden	Mar 19	Open Market Sale (S) Market Sale	296,948	-19,323	$6.42	-$124,111

February 02, 2026

Rachael Lester

Grant/Award Acquisition

Change: +20,000

Price: $0.00

Shares: 20,000

Value: +$0

Yu-Waye Chu

Grant/Award Acquisition

Change: +75,000

Price: $0.00

Shares: 210,725

Value: +$0

MARCIA BELVIN

Grant/Award Acquisition

Change: +60,000

Price: $0.00

Shares: 332,252

Value: +$0

Christopher Ogden

Grant/Award Acquisition

Change: +90,000

Price: $0.00

Shares: 316,271

Value: +$0

Sean A. McCarthy

Grant/Award Acquisition

Change: +210,000

Price: $0.00

Shares: 1,197,891

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Rachael Lester	Feb 04	Grant/Award Acquisition (A) Compensation/Award	20,000	+20,000	$0.00	+$0
Yu-Waye Chu	Feb 04	Grant/Award Acquisition (A) Compensation/Award	210,725	+75,000	$0.00	+$0
MARCIA BELVIN	Feb 04	Grant/Award Acquisition (A) Compensation/Award	332,252	+60,000	$0.00	+$0
Christopher Ogden	Feb 04	Grant/Award Acquisition (A) Compensation/Award	316,271	+90,000	$0.00	+$0
Sean A. McCarthy	Feb 04	Grant/Award Acquisition (A) Compensation/Award	1,197,891	+210,000	$0.00	+$0

November 06, 2025

Sean A. McCarthy

Open Market Sale

Change: -101,793

Price: $4.54

Shares: 987,891

Value: -$461,906

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Sean A. McCarthy	Nov 10	Open Market Sale (S) Market Sale	987,891	-101,793	$4.54	-$461,906

October 20, 2025

Rachael Lester

Grant/Award Acquisition

Change: +650,000

Price: $0.00

Shares: 650,000

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Rachael Lester	Oct 29	Grant/Award Acquisition (A) Compensation/Award	650,000	+650,000	$0.00	+$0

September 26, 2025

MARCIA BELVIN

Grant/Award Acquisition

Change: +36,300

Price: $0.00

Shares: 36,300

Value: +$0

Sean A. McCarthy

Grant/Award Acquisition

Change: +570,000

Price: $0.00

Shares: 570,000

Value: +$0

Yu-Waye Chu

Grant/Award Acquisition

Change: +87,500

Price: $0.00

Shares: 87,500

Value: +$0

Christopher Ogden

Grant/Award Acquisition

Change: +78,250

Price: $0.00

Shares: 78,250

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
MARCIA BELVIN	Sep 30	Grant/Award Acquisition (A) Compensation/Award	36,300	+36,300	$0.00	+$0
Sean A. McCarthy	Sep 30	Grant/Award Acquisition (A) Compensation/Award	570,000	+570,000	$0.00	+$0
Yu-Waye Chu	Sep 30	Grant/Award Acquisition (A) Compensation/Award	87,500	+87,500	$0.00	+$0
Christopher Ogden	Sep 30	Grant/Award Acquisition (A) Compensation/Award	78,250	+78,250	$0.00	+$0

June 16, 2025

Christopher Ogden

Open Market Sale

Change: -10,614

Price: $2.69

Shares: 226,271

Value: -$28,539

MARCIA BELVIN

Open Market Sale

Change: -13,884

Price: $2.69

Shares: 272,252

Value: -$37,334

Sean A. McCarthy

Open Market Sale

Change: -55,511

Price: $2.69

Shares: 1,089,684

Value: -$149,263

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Christopher Ogden	Jun 17	Open Market Sale (S) Market Sale	226,271	-10,614	$2.69	-$28,539
MARCIA BELVIN	Jun 17	Open Market Sale (S) Market Sale	272,252	-13,884	$2.69	-$37,334
Sean A. McCarthy	Jun 17	Open Market Sale (S) Market Sale	1,089,684	-55,511	$2.69	-$149,263

June 13, 2025

Christopher Ogden

Option Exercise/Conversion

Change: +37,500

Price: $0.00

Shares: 236,885

Value: +$0

Christopher Ogden

Open Market Sale

Change: -1,641

Price: $2.95

Shares: 199,385

Value: -$4,841

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Christopher Ogden	Jun 17	Option Exercise/Conversion (M) Compensation/Award	236,885	+37,500	$0.00	+$0
Christopher Ogden	Jun 17	Open Market Sale (S) Market Sale	199,385	-1,641	$2.95	-$4,841