Officer Michelle Buczkowski of Eos Energy Enterprises, Inc. filed a Form 144 notice on October 29, 2026, proposing the sale of 50,000 shares of common stock with an aggregate market value of $95,250.00 through UBS Financial Services, Inc. on Nasdaq.

Key Highlights

  • Proposed sale: 50,000 shares of Eos Energy Enterprises common stock with an aggregate market value of $95,250.00.
  • Source of shares: The shares were acquired on October 28, 2026, via RSU vesting from the issuer.
  • Shares outstanding: According to the filing, 364,167,744 shares of common stock were outstanding at the time of notice.
  • Broker: UBS Financial Services, Inc., Eleven Madison Avenue, 4th Floor, New York, NY 10010 is named as the executing broker.
  • 10b5-1 plan: The filing states the sale "will be sold pursuant to a Rule 10b5-1 trading plan adopted by the reporting person to cover estimated tax withholding obligations from the vesting of restricted stock units," with the plan adopted on December 11, 2025.
  • No prior sales: The filing reports nothing to disclose for securities sold during the past three months.

Eos Energy Officer Files Rule 144 Notice for RSU-Linked Share Sale

Michelle Buczkowski, identified in the filing as an officer of Eos Energy Enterprises, Inc. (NASDAQ:EOSE), submitted a Form 144 notice dated October 29, 2026, disclosing a proposed sale of 50,000 shares of the company's common stock. The filing lists the approximate date of sale as October 29, 2026, and names UBS Financial Services, Inc. as the broker for the transaction.

According to the filing, the 50,000 shares were acquired on October 28, 2026, through RSU vesting from the issuer, with the nature of payment listed as "NA." The aggregate market value of the shares proposed for sale is stated as $95,250.00. The filing notes that, at the time of notice, 364,167,744 shares of Eos Energy Enterprises common stock were outstanding.

The filing's remarks section states that the proposed sale is covered by a Rule 10b5-1 trading plan, which Buczkowski adopted on December 11, 2025. The stated purpose of the plan, as disclosed, is to cover estimated tax withholding obligations arising from the vesting of restricted stock units. The filing reports no sales of Eos Energy securities by Buczkowski in the three months preceding this notice.

What Was Disclosed

Eos Energy Enterprises officer Michelle Buczkowski filed a Form 144 notice proposing to sell 50,000 shares of common stock, valued at $95,250.00 in aggregate, acquired through RSU vesting on October 28, 2026, under a pre-established Rule 10b5-1 plan adopted December 11, 2025.