Insider · CIK 0001833309

Joe Mastrangelo

Files at: EOSE. On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $0 · 0sales $1.6M · 2net −$1.6M

Reported trades — common stock

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Sep 16, 2026 SForm 4 →	Sep 16, 4:27 pm EDT	Eos Energy Enterprises, Inc.EOSE	250,000	$3.92	$980,000	2,308,704	−9.77%	10b5-1
Sep 14, 2026 AForm 4 →	Sep 16, 4:27 pm EDT	Eos Energy Enterprises, Inc.EOSE	500,000	—	—	2,558,704	—	10b5-1
Jul 27, 2026 SForm 4 →	Jul 28, 5:02 pm EDT	Eos Energy Enterprises, Inc.EOSE	159,154	$3.61	$574,546	1,947,586	−7.55%
Jul 25, 2026 MForm 4 →	Jul 28, 5:02 pm EDT	Eos Energy Enterprises, Inc.EOSE	333,334	—	—	2,106,740	—
Jul 21, 2026 MForm 4 →	Aug 6, 8:14 am EDT	Eos Energy Enterprises, Inc.EOSE	111,118	$5.48	$608,927	2,058,704	—	late
Jul 5, 2026 FMForm 4 →	Jul 7, 5:18 pm EDT	Eos Energy Enterprises, Inc.EOSE	375,549	$5.06	$613,500	1,773,406	—
Jun 26, 2026 FMForm 4 →	Jun 30, 5:05 pm EDT	Eos Energy Enterprises, Inc.EOSE	191,273	$6.09	$369,681	1,640,347	—
Jun 12, 2026 FMForm 4 →	Jun 15, 9:15 am EDT	Eos Energy Enterprises, Inc.EOSE	316,646	$3.08	$974,875	1,570,480	—

Reported trades — derivatives (options, RSUs, warrants)

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Sep 14, 2026 MForm 4 →	Sep 16, 4:27 pm EDT	Eos Energy Enterprises, Inc.EOSE	500,000	—	—	0	—	10b5-1
Aug 24, 2026 AForm 4 →	Aug 26, 4:03 pm EDT	Eos Energy Enterprises, Inc.EOSE	611,406	—	—	611,406	—
Jul 25, 2026 MForm 4 →	Jul 28, 5:02 pm EDT	Eos Energy Enterprises, Inc.EOSE	333,334	—	—	333,333	—
Jul 21, 2026 MForm 4 →	Aug 6, 8:14 am EDT	Eos Energy Enterprises, Inc.EOSE	159,876	—	—	48,758	—	late
Jul 5, 2026 MForm 4 →	Jul 7, 5:18 pm EDT	Eos Energy Enterprises, Inc.EOSE	254,304	—	—	0	—
Jun 26, 2026 MForm 4 →	Jun 30, 5:05 pm EDT	Eos Energy Enterprises, Inc.EOSE	130,570	—	—	261,140	—
Jun 12, 2026 MForm 4 →	Jun 15, 9:15 am EDT	Eos Energy Enterprises, Inc.EOSE	200,000	—	—	0	—