InsidersTradesSigma
Total declarations
Companies
▲ Purchases (0 ops.)
▼ Sales (1 ops.)
Insider track record
Board DirectorDisclosed buys
0
Disclosed sells
1
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
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 2 January 2026 (Attribution). Regulator: SEC (Form 4). All data is openly available.
Companies and markets linked to Helmer Maureen O
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations26 total
50,000 sharesCommon StockSEC:0001104659-26-072322:0
13,959 shares@ US$1.9750.0% of flowCommon StockSEC:0001104659-26-001512:0
11,803 shares@ US$2.33100.0% of flowCommon StockSEC:0001104659-25-096693:0
76,531 shares0Common StockSEC:0001104659-25-070384:0
18,456 shares@ US$1.498.6% of flowCommon StockSEC:0001104659-25-065804:0
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$28.613.5% of flowCommon StockSEC:0001104659-22-042731:0
376 shares@ US$28.233.5% of flowCommon StockSEC:0001104659-22-001490:0
416 shares@ US$25.543.4% of flowCommon StockSEC:0001104659-21-123062:0
4,482 shares0Common StockSEC:0001104659-21-107837:0
296 shares@ US$35.843.3% of flowCommon StockSEC:0001104659-21-094577:0
25 of 26 declarations
About Helmer Maureen O
HELMER MAUREEN O is a Director at PLUG POWER INC and Plug Power INC, on XNAS. She has 26 filings in total, and within the full set of sampled filings the main transactions are attributed awards, with a date range from 2016-01-15 to 2026-06-10.
