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Eos Energy Enterprises, Inc. planned insider sales

In the last twelve months insiders at Eos Energy Enterprises, Inc. filed 27 Form 144 notices of planned sales, 2.4 million shares worth $21.3 million at the time of filing, from 13 sellers. The latest, filed 29 October 2026: Buczkowski Michelle (officer), 50,000 shares worth $95,250, planned for around 29 October 2026 through UBS Financial Services, Inc..

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
29 October 2026Buczkowski MichelleOfficer50,000$95,25029 October 202650,000 shares from 29 October 2026UBS Financial Services, Inc.RSU VestingForm 144
29 October 2026Nathan KroekerFormer Officer147,208$290,26829 October 2026None on Form 4 yetUBS Financial Services IncRSU VestingForm 144
22 September 2026Michael SilbermanFormer Officer114,650$467,26322 September 2026None on Form 4 yetUBS Financial Services IncRSU VestingForm 144
16 September 2026Puri SumeetOfficer43,750$181,56216 September 202643,750 shares from 16 September 2026UBS Financial Services, Inc.RSU VestingForm 144
16 September 2026Silberman Michael WFormer Officer109,375$453,90616 September 2026None on Form 4 yetUBS Financial Services, Inc.RSU VestingForm 144
16 September 2026Kroeker NathanFormer Officer165,625$687,34416 September 2026None on Form 4 yetUBS Financial Services Inc.RSU VestingForm 144
16 September 2026Mastrangelo JoeOfficer, Director250,000$1.0 million16 September 2026250,000 shares from 16 September 2026UBS Financial Services, Inc.RSU VestingForm 144
9 September 2026Puri SumeetOfficer34,167$142,8189 September 202634,167 shares from 9 September 2026UBS Financial Services, Inc.RSU VestingForm 144
28 July 2026Puri SumeetOfficer29,167$100,04328 July 202629,167 shares from 28 July 2026UBS Financial Services, Inc.RSU VestingForm 144
28 July 2026Silberman Michael WFormer Officer72,917$250,10528 July 2026No matching Form 4 saleUBS Financial Services, Inc.RSU VestingForm 144
28 July 2026Kroeker NathanOfficer110,417$378,73028 July 2026110,417 shares from 28 July 2026UBS Financial Services Inc.RSU VestingForm 144
7 July 2026Kroeker NathanOfficer79,309$412,4077 July 202679,309 shares from 7 July 2026UBS Financial Services Inc.RSU VestingForm 144
30 June 2026Puri SumeetOfficer8,823$52,85030 June 20268,823 shares from 30 June 2026UBS Financial Services Inc.RSU VestingForm 144
30 June 2026Buczkowski MichelleOfficer11,469$68,69930 June 202611,469 shares from 30 June 2026UBS Financial Services, Inc.RSU VestingForm 144
30 June 2026Silberman Michael WOfficer14,998$89,83830 June 202614,998 shares from 30 June 2026UBS Financial Services, Inc.RSU VestingForm 144
30 June 2026Kroeker NathanOfficer35,289$211,38130 June 202635,289 shares from 30 June 2026UBS Financial Services Inc.RSU VestingForm 144
28 May 2026Marian WaltersOfficer30,000$275,40028 May 202630,000 shares from 28 May 2026UBS Financial Services IncStock Option ExerciseForm 144
19 May 2026Marian WaltersOfficer30,000$212,10019 May 202630,000 shares from 19 May 2026UBS Financial Services IncStock Option ExerciseForm 144
26 January 2026Kroeker NathanOfficer50,000$849,25026 January 202650,000 shares from 26 January 2026UBS Financial Services Inc.RSU VestingForm 144
23 January 2026Silberman Michael WOfficer41,667$760,63123 January 202641,667 shares from 23 January 2026UBS Financial Services, Inc.RSU VestingForm 144
8 December 2025Stidolph Russell MonokiDirector29,999$449,6858 December 2025No matching Form 4 saleStifel Nicolaus & Company IncReceived through convertible note redemptionForm 144
8 December 2025Russ StidolphOfficer296,439$4.4 million8 December 2025266,134 shares from 8 December 2025UBS Financial Services IncStock Option ExerciseForm 144
5 December 2025Bornstein Jeffrey SDirector8,000$119,9205 December 2025No matching Form 4 saleStifel Nicolaus & Company IncPIPE TransactionForm 144
5 December 2025Alex DimitriefOfficer17,704$266,0915 December 2025No matching Form 4 saleUBS Financial Services IncStock Option ExerciseForm 144
5 December 2025Jeff BornsteinOfficer32,328$486,4265 December 202540,328 shares from 4 December 2025UBS Financial Services IncRSUForm 144
5 December 2025Stidolph Russell MonokiDirector500,000$7.5 million5 December 2025500,000 shares from 5 December 2025Stifel Nicolaus & Company IncReceived through convertible note redemptionForm 144
4 December 2025Marian WaltersOfficer66,933$1.1 million4 December 202550,000 shares from 4 December 2025UBS Financial Services IncStock Option ExerciseForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Sold, per Form 4: the same seller's open-market sales on Form 4 from the notice's date to 90 days after, added up, as they appear on the insiders page; a holder who files no Form 4, such as some large holders, never shows one. What is a Form 144?