Westport Fuel Systems Inc. (WPRT) Ownership
WPRT ownership summary
as of October 18, 2026- Institutions
- 21.1% of shares outstanding
- Insiders
- 10.07% of shares outstanding
- Shares outstanding
- 19.0M
- Float
- 15.7M shares available to trade
- Short interest
- 2.32% 438K shares short
- Days to cover
- 7.56 short interest down 8.1% vs prior month
- Institutions 21.08%
- Insiders 10.07%
- Other investors 68.85%
WPRT top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Heights Capital Management Inc | 6.98% | 1.3M | $2.4M | +1.3M (0.0%) | June 30, 2026 |
| 2 | Royce & Associates, LP | 5.96% | 1.1M | $2.0M | +639,577 (+130.0%) | June 30, 2026 |
| 3 | Grace & White Inc | 3.76% | 714K | $1.3M | −292,602 (−29.1%) | June 30, 2026 |
| 4 | TSP Capital Management Group/LLC | 1.18% | 225K | $405,000 | +225,000 (0.0%) | September 30, 2026 |
| 5 | Baird Financial Group, Inc. | 0.74% | 140K | $252,043 | −23,874 (−14.6%) | June 30, 2026 |
| 6 | Citadel Advisors Llc | 0.47% | 90K | $161,926 | −64,946 (−41.9%) | June 30, 2026 |
| 7 | U.S. Bancorp | 0.38% | 73K | $131,594 | −93,721 (−56.2%) | June 30, 2026 |
| 8 | The Goldman Sachs Group Inc | 0.17% | 32K | $56,965 | −6,598 (−17.3%) | June 30, 2026 |
| 9 | CAMBRIDGE Invest RESEARCH ADVISORS, INC. | 0.12% | 23K | $42,232 | +11,681 (+99.2%) | June 30, 2026 |
| 10 | UBS Group AG | 0.10% | 19K | $34,769 | +2,898 (+17.7%) | June 30, 2026 |
| 11 | TD Waterhouse Canada Inc | 0.10% | 18K | $32,605 | — | June 30, 2026 |
| 12 | Susquehanna International Group, LLP | 0.09% | 18K | $32,431 | +18,017 (0.0%) | June 30, 2026 |
| 13 | Jane Street Group LLC | 0.07% | 14K | $25,079 | −1,260 (−8.3%) | June 30, 2026 |
| 14 | HRT FINANCIAL LLC | 0.07% | 13K | $23,972 | +13,318 (0.0%) | June 30, 2026 |
| 15 | LPL Financial Corp | 0.06% | 11K | $20,304 | +1,254 (+12.5%) | June 30, 2026 |
| 16 | Royal Bank of Canada | 0.03% | 5,978 | $10,760 | −1,880 (−23.9%) | June 30, 2026 |
| 17 | Morgan Stanley - Brokerage Accounts | 0.02% | 3,773 | $6,791 | −288 (−7.1%) | June 30, 2026 |
| 18 | Tower Research Capital LLC | 0.01% | 2,585 | $4,653 | −1,100 (−29.9%) | June 30, 2026 |
| 19 | Group One Trading, LLC | 0.01% | 1,997 | $3,595 | +1,100 (+122.6%) | June 30, 2026 |
| 20 | Wells Fargo & Co | 0.01% | 1,736 | $3,125 | +295 (+20.5%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 10 holders added 2.2M shares and 9 cut 486K.
WPRT top mutual fund and ETF holders
9 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Royce Micro-Cap Trust | 4.13% | 784K | $1.4M | +71,156 (+10.0%) | September 30, 2026 |
| 2 | Royce Micro-Cap Invmt | 1.82% | 346K | $623,585 | +31,459 (+10.0%) | September 30, 2026 |
| 3 | Royce Capital Micro-Cap Inv | 0.60% | 114K | $205,733 | +10,385 (+10.0%) | September 30, 2026 |
| 4 | Fidelity Nasdaq Composite Index | 0.03% | 6,610 | $11,898 | — | August 31, 2026 |
| 5 | Dimensional Global Small Coms USD Acc | <0.01% | 548 | $986 | — | August 31, 2026 |
| 6 | Dimensional World Allc 60/40 GBP Acc | <0.01% | 530 | $954 | — | August 31, 2026 |
| 7 | Dimensional Global Core Equity USD Acc | <0.01% | 445 | $801 | — | August 31, 2026 |
| 8 | Piz Palue Fund D | <0.01% | 400 | $720 | — | August 31, 2026 |
| 9 | Dimensional International Core Eq Acc | <0.01% | 297 | $535 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
WPRT shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns WPRT
Institutional investors own 21.1% of Westport Fuel Systems's shares and insiders 10.07%. The largest holder is Heights Capital Management Inc with 6.98% of the shares (1.3M), as of June 30, 2026. Among the top 20 institutions, 10 added shares and 9 reduced their stake in the latest filings. Short interest is 2.32% of the float, or 7.56 days of average trading volume. The share count rose 173.1% since 2014.
Related: WPRT analyst forecast, WPRT key metrics. See the WPRT stock overview for the latest quote and news.
WPRT ownership FAQ
Who owns the most Westport Fuel Systems stock?
The largest shareholders of Westport Fuel Systems are Heights Capital Management Inc (6.98%), Royce & Associates, LP (5.96%), Grace & White Inc (3.76%), TSP Capital Management Group/LLC (1.18%), Baird Financial Group, Inc. (0.74%).
What percentage of Westport Fuel Systems is owned by institutions?
Institutions hold 21.1% of Westport Fuel Systems's shares outstanding; insiders hold 10.07%.
Which funds own Westport Fuel Systems?
The largest fund holders of Westport Fuel Systems are Royce Micro-Cap Trust (4.13%), Royce Micro-Cap Invmt (1.82%), Royce Capital Micro-Cap Inv (0.60%), Fidelity Nasdaq Composite Index (0.03%), Dimensional Global Small Coms USD Acc (<0.01%).
What is Westport Fuel Systems's short interest?
438K shares of Westport Fuel Systems were sold short, 2.32% of the float; at the average daily volume it would take 7.56 days to cover.
How many shares of Westport Fuel Systems are outstanding?
Westport Fuel Systems has 19.0M shares outstanding, of which 15.7M are in the public float.