Maureen O. Helmer

Companies

• Plug PowerBoard member Feb 6, 2006 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Plug Power PLUG361,318 shares²$498.7K at $1.38Jun 11, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Jun 11, 2026Granted 39,753 shares of Plug Power²
• Jun 8, 2026Sold 50,000 shares at $3.23 of Plug Power³
• Jan 2, 2026Granted 13,959 shares at $1.97 of Plug Power⁴
• Oct 1, 2025Granted 11,803 shares at $2.33 of Plug Power⁵
• Jul 3, 2025Granted 76,531 shares of Plug Power⁶
• Jul 1, 2025Granted 18,456 shares at $1.49 of Plug Power⁷
• Apr 1, 2025Granted 20,370 shares at $1.35 of Plug Power⁸
• Jan 2, 2025Granted 12,911 shares at $2.13 of Plug Power⁹
• Oct 1, 2024Granted 12,168 shares at $2.26 of Plug Power¹⁰
• Jul 1, 2024Granted 11,803 shares at $2.33 of Plug Power¹¹
• Jun 5, 2024Granted 37,375 shares of Plug Power¹²
• Apr 1, 2024Granted 7,994 shares at $3.44 of Plug Power¹³
• Jan 2, 2024Granted 3,056 shares at $4.50 of Plug Power¹⁴
• Oct 2, 2023Granted 1,809 shares at $7.60 of Plug Power¹⁵
• Jul 3, 2023Granted 1,323 shares at $10.39 of Plug Power¹⁶
• Jun 27, 2023Granted 12,149 shares of Plug Power¹⁷
• Apr 3, 2023Granted 1,173 shares at $11.72 of Plug Power¹⁸
• Jan 3, 2023Granted 859 shares at $12.37 of Plug Power¹⁹
• Oct 3, 2022Granted 506 shares at $21.01 of Plug Power²⁰
• Jul 1, 2022Granted 641 shares at $16.57 of Plug Power²¹
• Jun 30, 2022Granted 6,789 shares of Plug Power²²
• Apr 1, 2022Granted 371 shares at $28.61 of Plug Power²³
• Jan 3, 2022Granted 376 shares at $28.23 of Plug Power²⁴
• Oct 1, 2021Granted 416 shares at $25.54 of Plug Power²⁵