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Eos Energy Enterprises, Inc.

EOSEW
Exchange
Nasdaq
Industry
Miscellaneous Electrical Machinery, Equipment & Supplies
SEC CIK
0001805077

In the last 90 days, Eos Energy Enterprises, Inc. insiders filed 1 open-market purchase and 7 sales; no institution reported holding it in 13F filings for Q2 2026; no superinvestor holds it.

Other share classesEOSE

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Eos Energy Enterprises, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
1 filing
1 insider, $58.7K in total
Open-market sells
7 filings
3 insiders, $2.71M in total
Insiders trading
4
Net value
−$2.65M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Eos Energy Enterprises, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Eos Energy Enterprises, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Puri SumeetChief Accounting Officer280,195Sep 16, 20265
Mastrangelo JoeChief Executive Officer2,308,704Sep 16, 20269
Song HaiyanDirector15,000Sep 15, 20262
Buczkowski MichelleChief Commercial Officer61,827Aug 26, 20264
Lagi AlessandroChief Financial Officer–Aug 26, 20262
CCM Frontier JV Holdco, LLCDirector, 10% Owner–Aug 6, 20261
CCM Frontier Power USA Holdings, LPDirector, 10% Owner–Aug 6, 20261
CCM Frontier Power USA Holdings GP, LLCDirector, 10% Owner–Aug 6, 20261
Cerberus GP Manager LLCDirector, 10% Owner–Aug 6, 20261
Dimitrief AlexanderDirector11,377IndirectAug 6, 20266
Walters MarianDirector171,634Aug 6, 20269
Bornstein Jeffrey SDirector143,806Aug 6, 20264
Urban DavidDirector97,767Aug 6, 20264
Nigro JosephDirector41,723Aug 6, 20265
Demby ClaudeDirector157,400Aug 6, 20263
Kroeker NathanChief Commercial Officer904,471Aug 6, 20265
Martin Marie BatzChief Legal Officer–Jul 15, 20261
Silberman Michael WChief Legal Officer298,277Jun 30, 20262
Nixon Gregory S.Director13,867Jun 9, 20262
McNeil JeffDirector122,290Jun 9, 20263
Stidolph Russell MonokiDirector364,355Dec 8, 20251
Javidi Eric MChief Financial Officer–Mar 19, 20250
CCM Denali Equity Holdings, LPDirector, 10% Owner0IndirectJan 27, 20250
CCM Denali Equity Holdings GP, LLCDirector, 10% Owner0IndirectJan 27, 20250
Cerberus Capital Management II, L.P.Director, 10% Owner0IndirectJan 27, 20250
Zibelman Audrey AnnDirector104,897May 2, 20240
Berube MelissaGeneral Counsel171,836Jan 30, 20240
Koch Industries IncOther: Former 10% Owner–May 4, 20230
Wood River Capital, LLCOther: Former 10% Owner–May 4, 20230
Tedone John JChief Accounting Officer25,487Feb 16, 20230
Gonzales Randall BChief Financial Officer188,094Jan 13, 20230
Shribman DanielOther: Former Director33,960Nov 10, 20220
Riley Bryant R10% Owner5,369,778IndirectAug 1, 20220
BRC Group Holdings, Inc.10% Owner5,369,778IndirectAug 1, 20220
BRF Investments, LLC10% Owner5,369,778IndirectAug 1, 20220
Spring Creek Capital LLC10% Owner0May 3, 20220
Singh Krishna PalDirector2,794,709IndirectMar 30, 20220
Kurada SagarChief Financial officer66,939Jan 5, 20220
AltEnergy Storage Bridge LLC10% Owner2,653,272IndirectJan 3, 20220
AltEnergy Transmission LLC10% Owner2,653,272IndirectJan 3, 20220
AltEnergy Storage VI LLC10% Owner2,653,272IndirectJan 3, 20220
AltEnergy Storage II LLC10% Owner2,653,272IndirectJan 3, 20220
AltEnergy Storage V LLC10% Owner2,653,272IndirectJan 3, 20220
AltEnergy Storage Bridge Phase II LLC10% Owner2,653,272IndirectJan 3, 20220
AltEnergy, LLC10% Owner2,653,272IndirectJan 3, 20220
BRC Partners Opportunity Fund, LP10% Owner5,765,942IndirectOct 18, 20210
B. Riley Capital Management, LLC10% Owner5,765,942IndirectOct 18, 20210
BRC Partners Management GP, LLC10% Owner5,765,942IndirectOct 18, 20210
B. Riley Securities, Inc.10% Owner0IndirectSep 21, 20210
B. Riley Principal Investments, LLC10% Owner0IndirectSep 21, 20210

Showing the 50 most recent filers.

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Jul 29, 2025 (view filing)Jul 29Same dayKroeker NathanCCO and Interim CFOSSale−99.4K$5.94−$590.3K−14.0%612.5K after10b5-1
Jul 29, 2025 (view filing)Jul 29Same dayMastrangelo JoeChief Executive OfficerSSale−166.7K$5.94−$990.0K−10.6%1.40M after10b5-1
Aug 5, 2025 (view filing)Aug 41 dayDimitrief AlexanderDirectorSSale−45.0K$6.00−$270.0K−17.0%219.5K after
Sep 3, 2025 (view filing)Sep 3Same dayWalters MarianDirectorSSale−50.0K$7.90−$395.0K−27.2%133.8K after
Sep 8, 2025 (view filing)Sep 8Same dayPuri SumeetChief Accounting OfficerSSale−40.5K$7.11−$288.1K−19.8%164.3K after2 lots10b5-1
Dec 8, 2025 (view filing)Dec 44 daysWalters MarianDirectorSSale−50.0K$15.81−$790.5K−27.0%135.3K after
Dec 8, 2025 (view filing)Dec 53 daysBornstein Jeffrey SDirectorSSale−32.3K$15.05−$486.5K−21.8%115.8K after
Dec 8, 2025 (view filing)Dec 44 daysBornstein Jeffrey SDirectorSSale−8.00K$15.75−$126.0K−100.0%0 after
Dec 8, 2025 (view filing)Dec 5-83 daysStidolph Russell MonokiDirectorSSale−530.0K$15.01−$7.96M−20.0%2.12M after2 lots
Dec 8, 2025 (view filing)Dec 8Same dayStidolph Russell MonokiDirectorSSale−236.1K$14.89−$3.52M−39.3%364.4K after2 lots
Jan 23, 2026 (view filing)Jan 23Same daySilberman Michael WChief Legal OfficerSSale−41.7K$17.74−$739.2K−12.8%283.3K after10b5-1
Jan 26, 2026 (view filing)Jan 26Same dayKroeker NathanCCO and Interim CFOSSale−50.0K$16.04−$802.0K−7.0%662.5K after10b5-1
Mar 3, 2026 (view filing)Mar 21 dayMastrangelo JoeChief Executive OfficerPPurchase+60.0K$5.75+$345.0K+4.3%1.46M after
Mar 4, 2026 (view filing)Mar 22 daysDimitrief AlexanderDirectorPPurchase+15.0K$6.04+$90.6K+6.8%235.2K after
Mar 5, 2026 (view filing)Mar 41 dayMastrangelo JoeChief Executive OfficerPPurchase+23.9K$6.58+$157.3K+1.6%1.49M after
Mar 10, 2026 (view filing)Mar 91 dayUrban DavidDirectorPPurchase+16.3K$6.16+$100.1K+35.2%62.5K after
May 19, 2026 (view filing)May 19Same dayWalters MarianDirectorSSale−7.68K$7.07−$54.3K−5.4%135.3K after
May 22, 2026 (view filing)May 202 daysWalters MarianDirectorSSale−22.3K$7.20−$160.7K−12.3%158.4K after
May 29, 2026 (view filing)May 281 dayWalters MarianDirectorSSale−30.0K$9.18−$275.4K−15.9%158.4K after
Jun 30, 2026 (view filing)Jun 30Same dayKroeker NathanCCO and Interim CFOSSale−35.3K$5.86−$206.8K−4.8%697.8K after10b5-1
Jun 30, 2026 (view filing)Jun 30Same daySilberman Michael WChief Legal OfficerSSale−15.0K$5.87−$88.0K−4.8%298.3K after10b5-1
Jun 30, 2026 (view filing)Jun 30Same dayBuczkowski MichelleChief Administration OfficerSSale−11.5K$5.87−$67.3K−16.2%59.2K after10b5-1
Jun 30, 2026 (view filing)Jun 30Same dayPuri SumeetChief Accounting OfficerSSale−8.82K$5.86−$51.7K−4.8%173.1K after10b5-1
Jul 7, 2026 (view filing)5:20 PM ETJul 7Same dayKroeker NathanCCO and Interim CFOSSale−79.3K$4.68−$371.2K−9.3%777.1K after10b5-1
Jul 28, 2026 (view filing)5:02 PM ETJul 271 dayMastrangelo JoeChief Executive OfficerSSale−159.2K$3.61−$574.5K−7.6%1.95M after
Jul 28, 2026 (view filing)5:02 PM ETJul 28Same dayKroeker NathanChief Commercial OfficerSSale−110.4K$3.36−$371.0K−11.1%887.5K after10b5-1
Jul 28, 2026 (view filing)5:03 PM ETJul 28Same dayPuri SumeetChief Accounting OfficerSSale−29.2K$3.36−$98.0K−12.6%202.3K after10b5-1
Sep 9, 2026 (view filing)6:05 PM ETSep 9Same dayPuri SumeetChief Accounting OfficerSSale−34.2K$4.13−$141.1K−12.6%236.4K after10b5-1
Sep 15, 2026 (view filing)8:56 AM ETSep 11-144 daysSong HaiyanDirectorPPurchase+15.0K$3.91+$58.7KNew position15.0K after2 lots
Sep 16, 2026 (view filing)4:27 PM ETSep 16Same dayMastrangelo JoeChief Executive OfficerSSale−250.0K$3.92−$980.0K−9.8%2.31M after10b5-1
Sep 16, 2026 (view filing)4:28 PM ETSep 16Same dayPuri SumeetChief Accounting OfficerSSale−43.8K$3.92−$171.5K−13.5%280.2K after10b5-1