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$CELC

$88.99 +$0.04 (0.04%)

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Insider Transactions

Insider Transaction Summary

Brian F. Sullivan

1,370,199 shares

Net: +354,340 B/S: ∞

JULIAN BAKER

703,920 shares

Net: +13,976 B/S: ∞

Lance G. Laing

100,000 shares

Net: +100,000 B/S: ∞

David Dalvey

90,000 shares

Net: -38,137 B/S: -

Vicky Hahne

80,000 shares

Net: +80,000 B/S: ∞

RICHARD NIGON

79,035 shares

Net: -25,303 B/S: ∞

Leo Furcht

11,000 shares

Net: +250 B/S: ∞

BRIAN F SULLIVAN

8,220 shares

Net: 0 B/S: -

Richard E Buller

7,435 shares

Net: +1,185 B/S: 1.25

Maureen Therese Cronin

5,054 shares

Net: 0 B/S: -

CHARLES R ROMP

215 shares

Net: +215 B/S: ∞

Polly A. Murphy

0 shares

Net: 0 B/S: -

Insider Name	Current Shares	Net Change (1yr)	Buy/Sell Ratio
Brian F. Sullivan	1,370,199	+354,340	∞
JULIAN BAKER	703,920	+13,976	∞
Lance G. Laing	100,000	+100,000	∞
David Dalvey	90,000	-38,137	-
Vicky Hahne	80,000	+80,000	∞
RICHARD NIGON	79,035	-25,303	∞
Leo Furcht	11,000	+250	∞
BRIAN F SULLIVAN	8,220	0	-
Richard E Buller	7,435	+1,185	1.25
Maureen Therese Cronin	5,054	0	-
CHARLES R ROMP	215	+215	∞
Polly A. Murphy	0	0	-

Individual Transactions

April 09, 2026

RICHARD NIGON

Gift

Change: -10,000

Price: $0.00

Shares: 79,035

Value: -$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
RICHARD NIGON	Apr 13	Gift (G) Non-Market Transfer	79,035	-10,000	$0.00	-$0

March 31, 2026

Richard E Buller

Option Exercise/Conversion

Change: +3,000

Price: $5.10

Shares: 9,760

Value: +$15,300

Richard E Buller

Open Market Sale

Change: -2,325

Price: $110.11

Shares: 7,435

Value: -$255,995

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Richard E Buller	Apr 02	Option Exercise/Conversion (M) Compensation/Award	9,760	+3,000	$5.10	+$15,300
Richard E Buller	Apr 02	Open Market Sale (S) Market Sale	7,435	-2,325	$110.11	-$255,995

February 11, 2026

CHARLES R ROMP

Grant/Award Acquisition

Change: +215

Price: $0.00

Shares: 215

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
CHARLES R ROMP	Feb 13	Grant/Award Acquisition (A) Compensation/Award	215	+215	$0.00	+$0

January 27, 2026

David Dalvey

Open Market Sale

Change: -20,000

Price: $120.03

Shares: 90,000

Value: -$2,400,538

Insider	Filing Date	Transaction	Shares	Change	Price	Value
David Dalvey	Jan 29	Open Market Sale (S) Market Sale	90,000	-20,000	$120.03	-$2,400,538

December 15, 2025

RICHARD NIGON

Gift

Change: -19,975

Price: $0.00

Shares: 89,035

Value: -$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
RICHARD NIGON	Jan 09	Gift (G) Non-Market Transfer	89,035	-19,975	$0.00	-$0

December 05, 2025

Richard E Buller

Option Exercise/Conversion

Change: +3,000

Price: $5.50

Shares: 9,760

Value: +$16,500

Richard E Buller

Open Market Sale

Change: -1,490

Price: $105.34

Shares: 8,270

Value: -$156,956

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Richard E Buller	Dec 09	Option Exercise/Conversion (M) Compensation/Award	9,760	+3,000	$5.50	+$16,500
Richard E Buller	Dec 09	Open Market Sale (S) Market Sale	8,270	-1,490	$105.34	-$156,956

December 04, 2025

Leo Furcht

Option Exercise/Conversion

Change: +250

Price: $7.60

Shares: 11,000

Value: +$1,900

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Leo Furcht	Dec 08	Option Exercise/Conversion (M) Compensation/Award	11,000	+250	$7.60	+$1,900

December 02, 2025

Richard E Buller

Gift

Change: -500

Price: $0.00

Shares: 6,760

Value: -$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Richard E Buller	Dec 03	Gift (G) Non-Market Transfer	6,760	-500	$0.00	-$0

December 01, 2025

Richard E Buller

Option Exercise/Conversion

Change: +1,100

Price: $14.83

Shares: 8,360

Value: +$16,313

Richard E Buller

Open Market Sale

Change: -1,100

Price: $98.13

Shares: 7,260

Value: -$107,948

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Richard E Buller	Dec 03	Option Exercise/Conversion (M) Compensation/Award	8,360	+1,100	$14.83	+$16,313
Richard E Buller	Dec 03	Open Market Sale (S) Market Sale	7,260	-1,100	$98.13	-$107,948

November 21, 2025

David Dalvey

Open Market Sale

Change: -15,000

Price: $100.00

Shares: 110,000

Value: -$1,500,016

Insider	Filing Date	Transaction	Shares	Change	Price	Value
David Dalvey	Nov 24	Open Market Sale (S) Market Sale	110,000	-15,000	$100.00	-$1,500,016

November 20, 2025

Richard E Buller

Option Exercise/Conversion

Change: +3,900

Price: $14.83

Shares: 11,160

Value: +$57,837

Richard E Buller

Open Market Sale

Change: -3,900

Price: $96.73

Shares: 7,260

Value: -$377,254

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Richard E Buller	Nov 21	Option Exercise/Conversion (M) Compensation/Award	11,160	+3,900	$14.83	+$57,837
Richard E Buller	Nov 21	Open Market Sale (S) Market Sale	7,260	-3,900	$96.73	-$377,254

November 19, 2025

Richard E Buller

Gift

Change: -500

Price: $0.00

Shares: 7,260

Value: -$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Richard E Buller	Nov 21	Gift (G) Non-Market Transfer	7,260	-500	$0.00	-$0

September 11, 2025

RICHARD NIGON

In/At-money Exercise

Change: +4,672

Price: $7.56

Shares: 105,765

Value: +$35,333

Insider	Filing Date	Transaction	Shares	Change	Price	Value
RICHARD NIGON	Sep 15	In/At-money Exercise (X) Derivative Exercise	105,765	+4,672	$7.56	+$35,333

September 08, 2025

JULIAN BAKER

Open Market Purchase

Change: +13,976

Price: $56.22

Shares: 703,920

Value: +$785,730

Insider	Filing Date	Transaction	Shares	Change	Price	Value
JULIAN BAKER	Sep 10	Open Market Purchase (P) Market Purchase	703,920	+13,976	$56.22	+$785,730

September 02, 2025

Brian F. Sullivan

In/At-money Exercise

Change: +104,340

Price: $8.05

Shares: 1,370,199

Value: +$839,937

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Brian F. Sullivan	Sep 04	In/At-money Exercise (X) Derivative Exercise	1,370,199	+104,340	$8.05	+$839,937

August 18, 2025

Vicky Hahne

Grant/Award Acquisition

Change: +80,000

Price: $0.00

Shares: 80,000

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Vicky Hahne	Aug 20	Grant/Award Acquisition (A) Compensation/Award	80,000	+80,000	$0.00	+$0