SEC Form 4 · Updated Daily

RIOT

— RIOT PLATFORMS, INC. Ownership

Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.

Financials Ownership

Current Reporting Owners

Owner	Role	Shares Owned	As Of	Last Activity
Yi Soo il Benjamin	Director · Officer	9,638,339	2026-01-01	A
Northern Data AG	10%+ Owner	6,949,992	2021-09-02	S
Les Jason	Director · Officer	4,944,637	2026-07-31	F
Chung Jason	Officer	3,129,142	2026-01-01	A
Jackman William Richard	Officer	2,853,105	2026-01-01	A
1837 Partners Ltd.	10%+ Owner	2,775,271	2007-07-18	S
1837 Partners QP L.P.	10%+ Owner	2,775,271	2007-07-18	S
1837 Partners L.P.	10%+ Owner	2,775,271	2007-07-18	S
1837 RMB Managers L.L.C.	10%+ Owner	2,775,271	2007-07-18	S
Peierls Brian E	10%+ Owner	2,044,728	2007-04-17	X
Peierls Foundation, Inc.	10%+ Owner	2,044,728	2007-04-17	X
PEIERLS E JEFFREY	10%+ Owner	2,044,728	2007-04-17	X
Howell Stephen Mitchell Jr.	Officer	1,834,408	2026-08-12	G
HURST ROGER	10%+ Owner	1,784,500	2006-08-09	P
MCGONEGAL JEFFREY	Officer	876,280	2023-01-11	F
Roaring Fork Capital SBIC, L.P.	10%+ Owner	768,624	2006-12-26	S
Werner Ryan D.	Officer	711,796	2026-08-05	S
Colgin Mark	Officer	472,075	2009-02-10	—
Mancini Remo	Director	471,544	2020-11-16	M
Honig Barry C	10%+ Owner	443,585	2017-01-04	P
Yee Colin M.	Officer	428,435	2026-07-01	M
Harris Chad Everett	Officer	232,400	2023-02-01	D
Brooks Megan M.	Officer	183,595	2022-07-13	M
Beeghley Michael Martin	Reporting Owner	177,918	2017-11-03	A
Gibbs Jonathan	Officer	84,989	2026-04-12	D
Chang Robby Sai Kit	Director	72,000	2018-09-20	M
D'Ambrosio Lance Varro	Director	68,891	2026-07-01	A
Theriot Lyle Joseph	Officer	66,482	2022-01-18	M
Cho Hannah	Director	59,265	2025-03-14	S
HEPLER DOUGLAS I	Director	59,000	2010-03-30	M
Hurd Donald R	Officer	50,000	2014-04-14	P
Mouton Douglas	Director	44,834	2026-07-01	A
KAPLAN ANDREW J	Director	41,500	2018-09-20	M
O'Rourke John R. III	Director · Officer	39,500	2017-12-29	S
Leverton Jaime	Director	36,450	2026-07-01	A
Turner Michael John	Director	36,450	2026-07-01	A
Robertsen Daniel Stefan	Officer	35,000	2018-01-07	—
PUSEY GREGORY	Officer	21,704	2012-06-29	P
Lundy Stephen T.	Director · Officer	20,500	2017-02-03	A
FAULKNER DARYL	Director	10,000	2009-05-19	P
So Eric	Director	7,500	2017-10-21	—
Dai Mike	Director	7,499	2017-08-21	A
Donnelly Richard G	Director · Officer	7,000	2008-01-29	P
Marleau Hubert	Director	5,000	2025-03-03	S
CASPARI ROBERT FREDERICK	Officer	3,200	2009-05-18	P
SCHOETTLER GAIL	Director	3,000	2012-08-03	P
Merson Michael R	Director	1,180	2012-06-29	P
Ensey Christopher	Officer	0	2018-09-20	M
Talon Opportunity Partners, L.P.	10%+ Owner	0	2006-04-03	S
Talon Opportunity Managers, L.L.C.	10%+ Owner	0	2006-04-03	S

Recent Filings

Date	Owner	Activity	Shares	Price	Owned After
2026-08-12	Howell Stephen Mitchell Jr.	Gift	21,198	$0.00	1,834,408
2026-08-05	Werner Ryan D.	Open-market sale	2,501	$23.53	699,493
2026-08-05	Werner Ryan D.	Open-market sale	9,802	$22.82	701,994
2026-08-05	Werner Ryan D.	Open-market sale	35,430	$21.98	711,796
2026-07-31	Les Jason	Tax withholding	2,896,921	$20.17	4,944,637
2026-07-31	Howell Stephen Mitchell Jr.	Tax withholding	153,162	$20.17	1,855,606
2026-07-31	Werner Ryan D.	Tax withholding	148,500	$20.17	747,226
2026-07-07	Werner Ryan D.	Open-market sale	7,596	$21.93	895,726
2026-07-07	Werner Ryan D.	Open-market sale	10,232	$21.22	903,322
2026-07-01	Howell Stephen Mitchell Jr.	Tax withholding	21,966	$23.96	2,008,768
2026-07-01	Les Jason	Tax withholding	101,015	$23.96	7,841,558
2026-07-01	Werner Ryan D.	Tax withholding	13,869	$23.96	913,554
2026-07-01	Yee Colin M.	Option exercise (derivative)	83,752	$0.00	1,990,543
2026-07-01	Yee Colin M.	Option exercise (derivative)	41,071	$0.00	2,074,295
2026-07-01	Yee Colin M.	Option exercise	124,823	$0.00	428,435
2026-07-01	Turner Michael John	Grant / award	8,347	$0.00	36,450
2026-07-01	D'Ambrosio Lance Varro	Grant / award	8,347	$0.00	68,891
2026-07-01	Mouton Douglas	Grant / award	8,347	$0.00	44,834
2026-07-01	Leverton Jaime	Grant / award	8,347	$0.00	36,450
2026-06-22	Werner Ryan D.	Open-market sale	25,375	$30.00	927,423
2026-06-22	Les Jason	Open-market sale	62,703	$30.09	1,263,556
2026-05-27	Werner Ryan D.	Open-market sale	37,616	$26.50	952,798
2026-05-11	Les Jason	Open-market sale	175,000	$25.19	1,326,259
2026-04-12	Gibbs Jonathan	Disposition to issuer	1,147,910	$0.00	84,989
2026-01-01	Les Jason	Grant / award	947,118	$0.00	8,673,921
2026-01-01	Les Jason	Grant / award	473,559	$0.00	7,726,803
2026-01-01	Werner Ryan D.	Grant / award	118,388	$0.00	990,414
2026-01-01	Werner Ryan D.	Grant / award	59,194	$0.00	872,026
2026-01-01	Werner Ryan D.	Tax withholding	9,943	$12.67	812,832
2026-01-01	Howell Stephen Mitchell Jr.	Grant / award	394,632	$0.00	2,030,734
2026-01-01	Howell Stephen Mitchell Jr.	Grant / award	197,316	$0.00	1,636,102
2026-01-01	Howell Stephen Mitchell Jr.	Tax withholding	29,482	$12.67	1,438,786
2026-01-01	Yi Soo il Benjamin	Grant / award	947,118	$0.00	9,638,339
2026-01-01	Yi Soo il Benjamin	Grant / award	473,559	$0.00	8,691,221
2026-01-01	Jackman William Richard	Grant / award	394,632	$0.00	2,853,105
2026-01-01	Jackman William Richard	Grant / award	197,316	$0.00	2,458,473
2026-01-01	Chung Jason	Grant / award	473,558	$0.00	3,129,142
2026-01-01	Chung Jason	Grant / award	236,779	$0.00	2,655,584
2026-01-01	Gibbs Jonathan	Grant / award	473,558	$0.00	1,232,899
2026-01-01	Gibbs Jonathan	Grant / award	236,779	$0.00	759,341

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.