Insider · CIK 0001865116

Buckley Sean Patrick

Reports to the SEC for 1 company · NEW YORK, NY

sec.gov

Transactions

Companies

Filings

CIK

0001865116

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-08-18	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−2,759 sh	$25.00	−$69K	293,060
2026-08-17	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−8,271 sh	$24.31	−$201K	295,819
2026-08-15	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−11.7K sh	$24.73	−$290K	304,090
2026-08-06	MGNIMAGNITE, INC.M Exercise/Conversion	See Remarks	MExercise/Conversion	+28.7K sh	$13.90	+$399K	382,984
2026-08-06	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−47.9K sh	$25.09	−$1.2M	335,042
2026-08-06	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−19.2K sh	$23.00	−$442K	315,805
2026-08-06	MGNIMAGNITE, INC. · Stock Option (right to buy)M Exercise/Conversion	See Remarks	MExercise/Conversion	−28.7K sh	—	—	57,405
2026-07-07	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−19.2K sh	$21.03	−$404K	354,281
2026-06-17	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−19.2K sh	$19.00	−$365K	373,514
2026-05-15	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−12K sh	$12.82	−$154K	392,747
2026-02-15	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−26.9K sh	$11.70	−$315K	402,999
2026-01-09	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−30.4K sh	$16.17	−$491K	429,941
2026-01-09	MGNIMAGNITE, INC.M Exercise/Conversion	See Remarks	MExercise/Conversion	+64.1K sh	—	—	460,310
2026-01-09	MGNIMAGNITE, INC. · Performance Stock UnitsM Exercise/Conversion	See Remarks	MExercise/Conversion	−64.1K sh	—	—	0
2026-01-01	MGNIMAGNITE, INC. · Performance Stock UnitsA Award	See Remarks	AAward	+42.8K sh	—	—	42,757
2026-01-01	MGNIMAGNITE, INC.A Award	See Remarks	AAward	+127K sh	—	—	396,185
2025-11-24	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−2,213 sh	$14.50	−$32.1K	268,912
2025-11-18	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−4,426 sh	$13.36	−$59.1K	271,125
2025-11-15	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−11.6K sh	$14.15	−$165K	275,551
2025-09-09	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−20K sh	$24.61	−$492K	287,193
2025-09-08	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−20K sh	$25.56	−$511K	307,193
2025-08-19	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−9,315 sh	$23.42	−$218K	327,193
2025-08-18	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−10.9K sh	$23.85	−$260K	336,508
2025-05-16	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−9,692 sh	$15.73	−$152K	347,394
2025-05-15	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−15K sh	$15.88	−$239K	357,086
2025-02-19	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−10.5K sh	$19.13	−$201K	370,558
2025-02-15	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−27.4K sh	$20.00	−$549K	381,085
2025-02-07	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−18.7K sh	$20.00	−$374K	408,529
2025-01-09	MGNIMAGNITE, INC. · Performance Stock UnitsA Award	See Remarks	AAward	+41.6K sh	—	—	41,566
2025-01-09	MGNIMAGNITE, INC.A Award	See Remarks	AAward	+123K sh	—	—	427,222
2024-11-18	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−10K sh	$15.60	−$156K	303,743
2024-11-15	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−10.1K sh	$15.85	−$161K	313,744
2024-11-11	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−2,619 sh	$15.50	−$40.6K	323,877
2024-11-11	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−2,623 sh	$14.50	−$38K	326,496
2024-08-20	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−2,623 sh	$13.50	−$35.4K	329,119
2024-08-19	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−2,623 sh	$12.53	−$32.9K	331,742
2024-08-15	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−9,646 sh	$12.51	−$121K	334,365
2024-07-16	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−19.6K sh	$15.50	−$304K	344,011
2024-07-15	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−19.6K sh	$14.50	−$284K	363,615
2024-06-05	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−21.7K sh	$13.50	−$292K	383,222
2024-05-24	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−2,682 sh	$12.50	−$33.5K	404,875
2024-05-16	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−16.9K sh	$12.50	−$212K	407,557
2024-05-15	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−9,407 sh	$9.80	−$92.2K	421,210
2024-02-15	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−24.1K sh	$9.74	−$235K	430,617
2024-01-02	MGNIMAGNITE, INC.A Award	See Remarks	AAward	+142K sh	—	—	454,727
2024-01-02	MGNIMAGNITE, INC. · Performance Stock UnitsA Award	See Remarks	AAward	+50.8K sh	—	—	50,752
2023-11-15	MGNIMAGNITE, INC.F Tax Payment	See Remarks	FTax Payment	−5,078 sh	$7.89	−$40.1K	312,451
2023-08-16	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−5,273 sh	$8.31	−$43.8K	317,529
2023-06-02	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−12.2K sh	$12.99	−$159K	322,802
2023-05-16	MGNIMAGNITE, INC.S Sale	See Remarks	SSale	−5,640 sh	$10.88	−$61.4K	335,021

Recent filings

Accepted (ET)
Aug 184
Buckley Sean Patrick0001865116-26-000009
SEC(opens sec.gov)
Aug 74
Buckley Sean Patrick0001865116-26-000007
SEC(opens sec.gov)
Jul 94
Buckley Sean Patrick0001193125-26-299731
SEC(opens sec.gov)
Jun 184
Buckley Sean Patrick0001193125-26-276264
SEC(opens sec.gov)
May 194
Buckley Sean Patrick0001865116-26-000004
SEC(opens sec.gov)
Feb 184
Buckley Sean Patrick0001865116-26-000003
SEC(opens sec.gov)
Jan 124
Buckley Sean Patrick0001865116-26-000002
SEC(opens sec.gov)
Jan 54
Buckley Sean Patrick0001865116-26-000001
SEC(opens sec.gov)
Nov 264
Buckley Sean Patrick0001865116-25-000004
SEC(opens sec.gov)
Nov 184
Buckley Sean Patrick0001865116-25-000003
SEC(opens sec.gov)
Sep 104
Buckley Sean Patrick0001415889-25-024106
SEC(opens sec.gov)

Companies

MAGNITE, INC.See RemarksMGNI

Address

C/O MAGNITE, INC. 1250 BROADWAY, 9TH FLOOR

NEW YORK, NY, 10001