# WESTPORT FUEL SYSTEMS INC (WPRT)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/WPRT/

- Reporting holders: 45
- Reported value: $8.6M
- Shares held by institutions: 3,735,867 of 17,375,213 outstanding
- Held through calls: 0.6%
- Held through puts: 1.4%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [HEIGHTS CAPITAL MANAGEMENT, INC](https://holderbook.com/funds/1081698-heights-capital-management-inc/) | $3.0M | 1,325,121 | 0.7% | 1 |
| [ROYCE & ASSOCIATES LP](https://holderbook.com/funds/906304-royce-associates-lp/) | $2.6M | 1,131,479 | 0.0% | 3 |
| [GRACE & WHITE INC /NY](https://holderbook.com/funds/903064-grace-white-inc-ny/) | $1.6M | 714,106 | 0.3% | 13 |
| [Ascentis Wealth Management, LLC](https://holderbook.com/funds/2032602-ascentis-wealth-management-llc/) | $905.8K | 1,200 | 0.0% | 2 |
| [CITADEL ADVISORS LLC](https://holderbook.com/funds/1423053-citadel-advisors-llc/) | $540.4K | 179,918 | 0.0% | 13 |
| [Baird Financial Group, Inc.](https://holderbook.com/funds/1648711-baird-financial-group-inc/) | $316.5K | 140,024 | 0.0% | 13 |
| [US BANCORP \DE\](https://holderbook.com/funds/36104-us-bancorp-de/) | $165.2K | 73,108 | 0.0% | 13 |
| [GOLDMAN SACHS GROUP INC](https://holderbook.com/funds/886982-goldman-sachs-group-inc/) | $71.5K | 31,647 | 0.0% | 13 |
| [JANE STREET GROUP, LLC](https://holderbook.com/funds/1595888-jane-street-group-llc/) | $62.5K | 13,933 | 0.0% | 3 |
| [Cambridge Investment Research Advisors, Inc.](https://holderbook.com/funds/1419186-cambridge-investment-research-advisors-inc/) | $54.0K | 23,462 | 0.0% | 7 |
| [UBS Group AG](https://holderbook.com/funds/1610520-ubs-group-ag/) | $43.7K | 19,316 | 0.0% | 13 |
| [SUSQUEHANNA INTERNATIONAL GROUP, LLP](https://holderbook.com/funds/1446194-susquehanna-international-group-llp/) | $40.7K | 18,017 | 0.0% | 2 |
| [TD Waterhouse Canada Inc.](https://holderbook.com/funds/1999606-td-waterhouse-canada-inc/) | $38.3K | 18,114 | 0.0% | 13 |
| [HRT FINANCIAL LP](https://holderbook.com/funds/1475597-hrt-financial-lp/) | $30.0K | 13,318 | 0.0% | 1 |
| [LPL Financial LLC](https://holderbook.com/funds/1403438-lpl-financial-llc/) | $25.5K | 11,280 | 0.0% | 3 |
| [ROYAL BANK OF CANADA](https://holderbook.com/funds/1000275-royal-bank-of-canada/) | $13.0K | 5,978 | 0.0% | 13 |
| [MORGAN STANLEY](https://holderbook.com/funds/895421-morgan-stanley/) | $8.5K | 3,773 | 0.0% | 13 |
| [Tower Research Capital LLC (TRC)](https://holderbook.com/funds/1533421-tower-research-capital-llc-trc/) | $5.8K | 2,585 | 0.0% | 8 |
| [GROUP ONE TRADING LLC](https://holderbook.com/funds/932540-group-one-trading-llc/) | $5.0K | 1,997 | 0.0% | 2 |
| [SIMPLEX TRADING, LLC](https://holderbook.com/funds/1488542-simplex-trading-llc/) | $4.3K | 1,604 | 0.0% | 1 |
| [WELLS FARGO & COMPANY/MN](https://holderbook.com/funds/72971-wells-fargo-company-mn/) | $3.9K | 1,736 | 0.0% | 13 |
| [Allworth Financial LP](https://holderbook.com/funds/1555170-allworth-financial-lp/) | $2.3K | 1,025 | 0.0% | 13 |
| [SWAN Capital LLC](https://holderbook.com/funds/1952722-swan-capital-llc/) | $2.3K | 1,000 | 0.0% | 9 |
| [JONES FINANCIAL COMPANIES LLLP](https://holderbook.com/funds/815917-jones-financial-companies-lllp/) | $1.8K | 710 | 0.0% | 2 |
| [OSAIC HOLDINGS, INC.](https://holderbook.com/funds/1677044-osaic-holdings-inc/) | $1.3K | 583 | 0.0% | 13 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 45 | $8.6M |
| Q1 2026 | 44 | $4.1M |
| Q4 2025 | 48 | $3.3M |
| Q3 2025 | 40 | $5.1M |
| Q2 2025 | 44 | $7.5M |
| Q1 2025 | 46 | $9.7M |
| Q4 2024 | 50 | $9.8M |
| Q3 2024 | 47 | $9.5M |
| Q2 2024 | 45 | $9.6M |
| Q1 2024 | 48 | $11.7M |
| Q4 2023 | 49 | $11.2M |
| Q3 2023 | 48 | $9.6M |