Ballard Power Systems Inc.
BLDPNasdaqTechnology · Electrical Industrial Apparatus · SEC filings ↗ · Compare ⊕
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SEC XBRL · annualNo structured XBRL financials available (common for pre-2009 filers, foreign issuers, or companies that never reported as a US public company).
5%+ owners
SEC Schedule 13D / 13G · last 3 yrs- Weichai Power Hong Kong International Development Co., LtdActivist (13D)May 19, 2026
- Blackrock, Inc.Passive (13G)Apr 24, 2025
Holders who disclosed a 5%+ stake. 13D signals intent to influence or control; 13G is a passive holding. Latest filing per holder — open it for the exact stake.
Short interest
FINRA · bi-monthly| Settlement | Shares short | Days to cover | Δ vs prior |
|---|---|---|---|
| May 15, 2026 | 22.1M | 1.7 | +5.3% |
| Apr 30, 2026 | 21.0M | 4.6 | +1.4% |
| Apr 15, 2026 | 20.7M | 7.1 | +0.8% |
| Mar 31, 2026 | 20.6M | 5.8 | -15.7% |
| Mar 13, 2026 | 24.4M | 5.6 | +2.9% |
Shares sold short as reported to FINRA. Days-to-cover = short shares ÷ average daily volume — higher means more potential squeeze pressure.
Recent SEC filings
All filings ↗- SDMay 28, 2026
- SCHEDULE 13D/AMay 19, 2026
- SCHEDULE 13D/AMay 15, 2026
- 6-KFORM 6-KMay 15, 2026
- SCHEDULE 13D/AMay 13, 2026
- 144May 8, 2026
- 6-KFORM 6-KMay 7, 2026
- 6-KFORM 6-KMay 6, 2026
- 6-KFORM 6-KMay 5, 2026
- 6-KMay 5, 2026
- 6-KREPORT OF FOREIGN PRIVATE ISSUERApr 24, 2026
- ARSApr 24, 2026
- 6-KFORM 6-KApr 13, 2026
- 6-KFORM 6-KApr 8, 2026
- 40-FMar 12, 2026
Event-driven situations (1)
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