Richard E. Buller

CIK: 0001688319

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)13 (43.3%)

Position reduction

Option Exercises (M)5 (16.7%)

Derivative conversions

Awards (A)2 (6.7%)

Compensation grants

Other (G, F, J, C, D, …)10 (33.3%)

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

Companies & Roles (1)

CELC

Celcuity Inc.

Director

Discretionary Trading P&L

Holdings

Transaction History (30 total)

CELC
Celcuity Inc.
Jun 10, 2026
Gift(G)
Stock Option (right to buy)
Direct
12.5K shares-
CELC
Celcuity Inc.
Jun 10, 2026
Gift(G)
Stock Option (right to buy)
Indirect
12.5K shares-
CELC
Celcuity Inc.
Jun 5, 2026
Award(A)
Direct
1.5K shares-
CELC
Celcuity Inc.
May 19, 2026
Gift(G)
Indirect
1K shares-
CELC
Celcuity Inc.
May 19, 2026
Gift(G)
Direct
1K shares-
CELC
Celcuity Inc.
May 4, 2026
Sale(S)
Indirect
550 shares at avg. $139.00$76K
CELC
Celcuity Inc.
May 4, 2026
Exercise(M)
Indirect
9K shares at avg. $5.10$46K
CELC
Celcuity Inc.
May 4, 2026
Sale(S)
Indirect
1.3K shares at avg. $137.00$177K
CELC
Celcuity Inc.
May 4, 2026
Sale(S)
Indirect
365 shares at avg. $143.24$52K
CELC
Celcuity Inc.
May 4, 2026
Sale(S)
Indirect
2.8K shares at avg. $142.04$401K
CELC
Celcuity Inc.
May 4, 2026
Sale(S)
Indirect
2.3K shares at avg. $141.03$325K
CELC
Celcuity Inc.
May 4, 2026
Sale(S)
Indirect
1.7K shares at avg. $139.58$233K
CELC
Celcuity Inc.
Mar 31, 2026
Sale(S)
Indirect
675 shares at avg. $110.83$75K
CELC
Celcuity Inc.
Mar 31, 2026
Exercise(M)
Indirect
3K shares at avg. $5.10$15K
CELC
Celcuity Inc.
Mar 31, 2026
Sale(S)
Indirect
2.3K shares at avg. $110.11$256K
CELC
Celcuity Inc.
Dec 5, 2025
Exercise(M)
Indirect
3K shares at avg. $5.50$17K
CELC
Celcuity Inc.
Dec 5, 2025
Sale(S)
Indirect
1.5K shares at avg. $106.04$160K
CELC
Celcuity Inc.
Dec 5, 2025
Sale(S)
Indirect
1.5K shares at avg. $105.34$157K
CELC
Celcuity Inc.
Dec 2, 2025
Gift(G)
Indirect
500 shares-
CELC
Celcuity Inc.
Dec 1, 2025
Sale(S)
Indirect
1.1K shares at avg. $98.13$108K
CELC
Celcuity Inc.
Dec 1, 2025
Exercise(M)
Indirect
1.1K shares at avg. $14.83$16K
CELC
Celcuity Inc.
Nov 20, 2025
Sale(S)
Indirect
3.9K shares at avg. $96.73$377K
CELC
Celcuity Inc.
Nov 20, 2025
Exercise(M)
Indirect
3.9K shares at avg. $14.83$58K
CELC
Celcuity Inc.
Nov 19, 2025
Gift(G)
Indirect
500 shares-
CELC
Celcuity Inc.
May 28, 2025
Gift(G)
Stock Option (right to buy)
Direct
6.5K shares-

		Type	Shares	Price		Ownership
Jun 10, 2026	CELC Celcuity Inc.	Gift(G) Stock Option (right to buy)	12,503	-	-	Direct
Jun 10, 2026	CELC Celcuity Inc.	Gift(G) Stock Option (right to buy)	12,503	-	-	Indirect
Jun 5, 2026	CELC Celcuity Inc.	Award(A)	1,530	-	$0	Direct
May 19, 2026	CELC Celcuity Inc.	Gift(G)	1,029	-	$0	Indirect
May 19, 2026	CELC Celcuity Inc.	Gift(G)	1,029	-	$0	Direct
May 4, 2026	CELC Celcuity Inc.	Sale(S)	550	$139.00	$76,448	Indirect
May 4, 2026	CELC Celcuity Inc.	Exercise(M)	9,000	$5.10	$45,900	Indirect
May 4, 2026	CELC Celcuity Inc.	Sale(S)	1,289	$137.00	$176,593	Indirect
May 4, 2026	CELC Celcuity Inc.	Sale(S)	365	$143.24	$52,282	Indirect
May 4, 2026	CELC Celcuity Inc.	Sale(S)	2,825	$142.04	$401,251	Indirect
May 4, 2026	CELC Celcuity Inc.	Sale(S)	2,301	$141.03	$324,503	Indirect
May 4, 2026	CELC Celcuity Inc.	Sale(S)	1,670	$139.58	$233,104	Indirect
Mar 31, 2026	CELC Celcuity Inc.	Sale(S)	675	$110.83	$74,808	Indirect
Mar 31, 2026	CELC Celcuity Inc.	Exercise(M)	3,000	$5.10	$15,300	Indirect
Mar 31, 2026	CELC Celcuity Inc.	Sale(S)	2,325	$110.11	$255,996	Indirect
Dec 5, 2025	CELC Celcuity Inc.	Exercise(M)	3,000	$5.50	$16,500	Indirect
Dec 5, 2025	CELC Celcuity Inc.	Sale(S)	1,510	$106.04	$160,113	Indirect
Dec 5, 2025	CELC Celcuity Inc.	Sale(S)	1,490	$105.34	$156,956	Indirect
Dec 2, 2025	CELC Celcuity Inc.	Gift(G)	500	-	-	Indirect
Dec 1, 2025	CELC Celcuity Inc.	Sale(S)	1,100	$98.13	$107,948	Indirect
Dec 1, 2025	CELC Celcuity Inc.	Exercise(M)	1,100	$14.83	$16,313	Indirect
Nov 20, 2025	CELC Celcuity Inc.	Sale(S)	3,900	$96.73	$377,255	Indirect
Nov 20, 2025	CELC Celcuity Inc.	Exercise(M)	3,900	$14.83	$57,837	Indirect
Nov 19, 2025	CELC Celcuity Inc.	Gift(G)	500	-	-	Indirect
May 28, 2025	CELC Celcuity Inc.	Gift(G) Stock Option (right to buy)	6,522	-	-	Direct

1-25 of 30 transactions

About Buller Richard E

Buller Richard E (SEC CIK 0001688319) files insider reports with the SEC as Director of Celcuity Inc. (CELC).

Signal8 holds 11 ownership filings by Buller Richard E, all Form 4s, filed between Oct 25, 2024 and Jun 12, 2026. Those filings report 30 transactions, from Oct 23, 2024 to Jun 10, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Buller Richard E's filings is in MINNEAPOLIS, MN.

Recent filings by Buller Richard E

Jun 10, 2026: Gifts of CELC derivative securities (2 lines, Form 4, code G).
Jun 5, 2026: Grant or award of CELC shares (Form 4, code A).
May 19, 2026: Gifts of CELC shares (2 lines, Form 4, code G).
May 4, 2026: Open-market sale of CELC shares (Form 4, code S).
May 4, 2026: Option exercise of CELC shares (Form 4, code M).

Other insiders filing for Celcuity Inc. (CELC)

Furcht Leo, Director
GRYSKA DAVID W, Director
Laing Lance G., Chief Science Officer
Sullivan Brian F., Chief Executive Officer
Hahne Vicky, Chief Financial Officer
BAKER BROS. ADVISORS LP, Officer

How to read Form 4 transaction codes