FORM ▲ +2.9% - FormFactor, Inc. $FORM 4P EOSE - Eos Energy Enterprises, Inc. DIRECTOR: Song Haiyan P | 15,000 | $3.913 | $58,700 FormFactor moved up 2.9% today following a Form 4 filing disclosing that director Song Haiyan purchased 15,000 shares of Eos Energy Enterprises at $3.913 per share for a total value of $58,700. The filing itself does not directly explain FormFactor's price movement, as it pertains to a director's transaction in a separate company. 15-SEP-2026 08:57 AM ET