Eos Energy Enterprises, Inc. (EOSE) Insider Ownership

Historic Insider Ownership Trends

As of March 23, 2026, the three largest insider holders of EOSE are Riley Financial, Inc. B. (TenPercentOwner, 5.77Mn shares), Russell Monoki Stidolph (Director, 2.41Mn shares), Joe Mastrangelo (Chief Executive Officer, 1.49Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Riley Financial, Inc. B. 0 5,765,942 18 Oct, 2021
Russell Monoki Stidolph 364,355 2,048,273 08 Dec, 2025
Joe Mastrangelo Chief Executive Officer 1,487,126 0 05 Mar, 2026
Nathan Kroeker Cco And Interim Cfo 662,512 0 26 Jan, 2026
Michael W Silberman Chief Legal Officer 283,279 0 23 Jan, 2026
Alexander Dimitrief 235,221 0 04 Mar, 2026
Randall B Gonzales Chief Financial Officer 188,094 0 13 Jan, 2023
Melissa Berube General Counsel 171,836 0 30 Jan, 2024
Sumeet Puri Chief Accounting Officer 164,290 0 08 Sep, 2025
Claude Demby 141,708 0 16 May, 2025
Marian Walters 135,334 0 08 Dec, 2025
Jeffrey S Bornstein 115,759 0 08 Dec, 2025
Audrey Ann Zibelman 104,897 0 02 May, 2024
Jeff Mcneil 99,179 0 08 Dec, 2025
Sagar Kurada Chief Financial Officer 66,939 0 05 Jan, 2022
David Urban 62,471 0 10 Mar, 2026
Joseph Nigro 35,385 0 16 May, 2025
Daniel Shribman 33,960 0 10 Nov, 2022
John J Tedone Chief Accounting Officer 25,487 0 16 Feb, 2023
Alexander Dimitrief 0 10,000 12 Mar, 2024
Marian Walters 0 5,000 07 Mar, 2022
Riley Financial, Inc. B. 1,769 0 21 Sep, 2021

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
09 Mar, 2026 David Urban Common Stock A 16,250 $6.16 62,471 D P
04 Mar, 2026 Joe Mastrangelo Common Stock A 23,900 $6.58 1,487,126 D P
02 Mar, 2026 Alexander Dimitrief Common Stock A 15,000 $6.04 235,221 D P
02 Mar, 2026 Joe Mastrangelo Common Stock A 60,000 $5.75 1,463,226 D P
23 Jan, 2026 Nathan Kroeker Common Stock A 100,000 $0.00 712,512 D M
26 Jan, 2026 Nathan Kroeker Common Stock D 50,000 $16.04 662,512 D S
23 Jan, 2026 Nathan Kroeker Restricted Stock Units D 100,000 $0.00 0 D M
22 Jan, 2026 Michael W Silberman Common Stock A 83,334 $0.00 324,946 D M
23 Jan, 2026 Michael W Silberman Common Stock D 41,667 $17.74 283,279 D S
22 Jan, 2026 Michael W Silberman Restricted Stock Units D 83,334 $0.00 83,333 D M
22 Dec, 2025 Joseph Nigro Restricted Stock Units A 3,565 $0.00 3,565 D A
22 Dec, 2025 Marian Walters Restricted Stock Units A 1,782 $0.00 1,782 D A
04 Dec, 2025 Jeff Mcneil Common Stock D 16,000 $0.00 99,179 D G
05 Dec, 2025 Alexander Dimitrief Common Stock A 18,473 $14.43 237,925 D M
04 Dec, 2025 Marian Walters Common Stock A 18,473 $14.43 152,267 D M
05 Dec, 2025 Jeffrey S Bornstein Common Stock D 32,328 $15.05 115,759 D S
05 Dec, 2025 Russell Monoki Stidolph Common Stock D 500,000 $14.99 2,153,272 I S
04 Dec, 2025 Jeffrey S Bornstein Common Stock D 8,000 $15.75 0 I S
04 Dec, 2025 Marian Walters Common Stock D 16,933 $15.75 135,334 D F
05 Dec, 2025 Alexander Dimitrief Common Stock D 17,704 $15.03 220,221 D F