WPRT
WESTPORT FUEL SYSTEMS INC.Marquee-fund ownership over time
This quarter's activity
New positions opened
None.
Positions exited
Current holders
Sorted by tenure (longest first)| Fund | First disclosed | Held | Entry price | Latest close | Return on entry |
|---|---|---|---|---|---|
| Citadel Advisors | Q3 2024(8Q snapshot) | 7Q | $5.60 | $2.02 | -64% |
“Return on entry” is the price-only move from the fund's first disclosure to today — it ignores any adds, trims, or dividends. A fund that built its position over multiple quarters has a true cost basis somewhere between entry price and latest close; this figure is the upper bound.
Past holders
Funds that exited at some point| Fund | Last entry | Exited | Entry → Exit | Return |
|---|---|---|---|---|
| Renaissance Technologies 2× in & out | Q1 2026 | Q2 2026 | → $2.00 | +5% |
| Millennium Management | Q1 2025 | Q2 2025 | → $2.85 | -38% |
Insider activity
Form 4 — officers, directors, 10%+ ownersFiled within two business days of each transaction by anyone with material insider status at WESTPORT FUEL SYSTEMS INC.. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.
30d / 90d windows measured from May 4, 2020 — the most recent Form 4 on file — not from today.
- Form 4/Aamend0000899243-20-011879May 4, 2020
- Form 40000899243-17-018695Jul 21, 2017
- Form 40000899243-16-021998Jun 7, 2016
- Form 40001209191-15-041870May 12, 2015
- Form 40001209191-13-007809Feb 11, 2013
- Form 40001209191-13-000289Jan 2, 2013
- Form 40001209191-12-042674Aug 20, 2012
- Form 40001209191-12-039756Jul 31, 2012
- Form 40001209191-12-038929Jul 24, 2012
- Form 40001209191-12-038770Jul 20, 2012
- Form 40001209191-12-037969Jul 12, 2012
- Form 40001209191-12-037662Jul 9, 2012
- Form 40001209191-12-035175Jun 25, 2012
- Form 40001209191-12-034485Jun 19, 2012
- Form 4/Aamend0001209191-12-033632Jun 13, 2012
Fundamentals
XBRL · WESTPORT FUEL SYSTEMS INC.Annual figures sourced directly from WESTPORT FUEL SYSTEMS INC.'s 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.
Recent SEC filings
10-K · 10-Q · 8-K · 13D/G · proxyThe most recent material filings for WESTPORT FUEL SYSTEMS INC. — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.
- 6-KInterim disclosure (foreign)Jun 4, 2026
- 6-KFORM 6-KMay 27, 2026
- 6-KInterim disclosure (foreign)May 21, 2026
- 6-KInterim disclosure (foreign)May 14, 2026
- 6-KFORM 6-KMay 14, 2026
- 6-KFORM 6-KMay 8, 2026
- 6-KFORM 6-KApr 30, 2026
- 6-KFORM 6-KApr 24, 2026
- 20-FAnnual report (foreign)Apr 23, 2026
- 6-KFORM 6-KApr 21, 2026
- 6-KFORM 6-KApr 16, 2026
- 6-KFORM 6-KApr 2, 2026
- 6-KFORM 6-KApr 1, 2026
- 6-KFORM 6-KMar 27, 2026
- 6-KFORM 6-KMar 20, 2026
Trade history
Every open→close lifecycle across tracked funds| Fund | Open date | Close date | Open price | Close price / current | Return |
|---|---|---|---|---|---|
| Renaissance Technologies | Q1 2026 | Q2 2026 | $1.90 | $2.00 | +5% |
| Millennium Management | Q1 2025 | Q2 2025 | $4.58 | $2.85 | -38% |
| Citadel Advisors | Q3 2024 | open | $5.60 | $2.02 | -64% |
| Renaissance Technologies | Q3 2024 | Q3 2025 | $5.56 | $3.28 | -41% |
- Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
- Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
- “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
- Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
- Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.