InsidersTradesSigma
Total declarations
Companies
▲ Purchases (0 ops.)
▼ Sales (1 ops.)
Insider track record
Board DirectorDisclosed buys
0
Disclosed sells
1
T+90 hit rate
33%
T+90 mean return
-10.0%
Across 21 buy signals with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Browse the complete record of transactions filed by HELMER MAUREEN O, Director. Officer active across 2 companies, notably PLUG POWER INC. Aggregated, 26 disclosures have been recorded. Breakdown: 0 buy · 1 sell. History available since 15 July 2021. The latest transaction was disclosed on 1 April 2025 (Attribution). Regulator: SEC (Form 4). All data is openly available.
Declarations26 total
50,000 sharesCommon StockSEC:0001104659-26-072322:0
20,370 shares@ US$1.359.3% of flowCommon StockSEC:0001104659-25-031665:0
12,911 shares@ US$2.139.7% of flowCommon StockSEC:0001104659-25-001293:0
12,168 shares@ US$2.269.1% of flowCommon StockSEC:0001104659-24-105830:0
11,803 shares@ US$2.339.3% of flowCommon StockSEC:0001104659-24-077780:0
37,375 shares0Common StockSEC:0001104659-24-069680:0
7,994 shares@ US$3.449.3% of flowCommon StockSEC:0001104659-24-043220:0
3,056 shares@ US$4.504.5% of flowCommon StockSEC:0001104659-24-001339:0
1,809 shares@ US$7.604.8% of flowCommon StockSEC:0001104659-23-106826:0
1,323 shares@ US$10.394.6% of flowCommon StockSEC:0001104659-23-078823:0
12,149 shares0Common StockSEC:0001104659-23-076295:0
1,173 shares@ US$11.724.6% of flowCommon StockSEC:0001104659-23-042143:0
859 shares@ US$12.373.6% of flowCommon StockSEC:0001104659-23-001387:0
506 shares@ US$21.013.9% of flowCommon StockSEC:0001104659-22-106326:0
6,789 shares0Common StockSEC:0001104659-22-082777:0
641 shares@ US$16.573.7% of flowCommon StockSEC:0001104659-22-080197:0
371 shares@ US$28.610.0002% mcap14.8% of flowCommon StockSEC:0001104659-22-042731:0
376 shares@ US$28.230.0002% mcap14.5% of flowCommon StockSEC:0001104659-22-001490:0
376 shares@ US$28.233.4% of flowCommon StockSEC:0001104659-22-001490
416 shares@ US$25.543.3% of flowCommon StockSEC:0001104659-21-123062
416 shares@ US$25.540.0002% mcap14.2% of flowCommon StockSEC:0001104659-21-123062:0
4,482 shares0Common StockSEC:0001104659-21-107837:0
4,482 shares0Common StockSEC:0001104659-21-107837
296 shares@ US$35.843.3% of flowCommon StockSEC:0001104659-21-094577
296 shares@ US$35.840.0002% mcap13.9% of flowCommon StockSEC:0001104659-21-094577:0
25 of 26 declarations
About HELMER MAUREEN O
Maureen O. Helmer is a Board Member at Plug Power Inc. In this role, she contributes to the strategic direction of the company and key decision-making. Helmer brings her expertise in management and business development, which is essential for Plug Power's growth. Her commitment to innovation and operational excellence is an asset to the company.
