As of October 30, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Westport Fuel Systems Inc. The largest reported stake is CVI Investments, Inc.'s, at 9.9%. 4 filings are on record since January 27, 2026 (Schedule 13G, June 29, 2026).
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Key facts
- · Reporting person: Royce & Associates LP · Sole voting: 1,131,479 · Shared voting: 0 · Sole dispositive: 1,131,479 · Shared dispositive: 0 · SCHEDULE 13G, 2026-07-22
- · Reporting person: CVI Investments, Inc. · Sole voting: 0 · Shared voting: 1,930,712 · Sole dispositive: 0 · Shared dispositive: 1,930,712 · SCHEDULE 13G, 2026-06-29
- · Reporting person: Robert W. Baird & Co. Inc · Sole voting: 0 · Shared voting: 177,282 · Sole dispositive: 0 · Shared dispositive: 177,282 · SCHEDULE 13G/A, 2026-02-06
- · Reporting person: Grace & White, Inc. · Sole voting: 154,922 · Shared voting: 0 · Sole dispositive: 1,163,087 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-01-27
Westport Fuel Systems Inc. has 4 Schedule 13D or 13G filings on record since 2026-01-27. 3 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| CVI Investments, Inc. | 9.9% | 1,930,712 | SCHEDULE 13G, 2026-06-29 | 2026-06-22 |
| Grace & White, Inc. | 6.7% | 1,163,087 | SCHEDULE 13G/A, 2026-01-27 | 2025-12-31 |
| Royce & Associates LP | 5.09% | 1,131,479 | SCHEDULE 13G, 2026-07-22 | 2026-06-30 |
| Robert W. Baird & Co. Inc | 1% | 177,282 | SCHEDULE 13G/A, 2026-02-06 | 2025-12-31 |
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What the Full Report on Westport Fuel Systems Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| CVI Investments, Inc. | 0 | 1,930,712 | 0 | 1,930,712 | SCHEDULE 13G, 2026-06-29 |
| Heights Capital Management, Inc. | 0 | 1,930,712 | 0 | 1,930,712 | SCHEDULE 13G, 2026-06-29 |
| Grace & White, Inc. | 154,922 | 0 | 1,163,087 | 0 | SCHEDULE 13G/A, 2026-01-27 |
| Royce & Associates LP | 1,131,479 | 0 | 1,131,479 | 0 | SCHEDULE 13G, 2026-07-22 |
| Robert W. Baird & Co. Inc | 0 | 177,282 | 0 | 177,282 | SCHEDULE 13G/A, 2026-02-06 |
| Baird Financial Corp | 0 | 177,282 | 0 | 177,282 | SCHEDULE 13G/A, 2026-02-06 |
| Baird Financial Group, Inc. | 0 | 177,282 | 0 | 177,282 | SCHEDULE 13G/A, 2026-02-06 |
The latest filing identifies Westport Fuel Systems Inc. by CUSIP 960908507 and gives its principal executive office as 1691 West 75th Avenue, Vancouver (SCHEDULE 13G, 2026-07-22).
What the percentages are based on
See the responses to Item (11) on the foregoing cover pages. The percentage was calculated based upon 17,282,934 Shares of Common Shares outstanding at December 31, 2024 as reported by the Issuer in its Annual Report on Form 40-F for the year ended December 31, 2024.Robert W. Baird & Co. Inc, SCHEDULE 13G/A, 2026-02-06
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-01-27 | Grace & White, Inc. | 6.7% | SCHEDULE 13G/A |
| 2026-02-06 | Robert W. Baird & Co. Inc | 1% | SCHEDULE 13G/A |
| 2026-06-29 | CVI Investments, Inc. | 9.9% | SCHEDULE 13G |
| 2026-07-22 | Royce & Associates LP | 5.09% | SCHEDULE 13G |
Questions about who owns Westport Fuel Systems Inc.
Who owns Westport Fuel Systems Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Westport Fuel Systems Inc.: CVI Investments, Inc. (9.9%, Schedule 13G, filed 2026-06-29), Grace & White, Inc. (6.7%, Schedule 13G/A, filed 2026-01-27) and Royce & Associates LP (5.09%, Schedule 13G, filed 2026-07-22).
Who are the largest shareholders of Westport Fuel Systems Inc.?
By the share each holder's latest filing reports, the largest holders of Westport Fuel Systems Inc. on this page are CVI Investments, Inc. (9.9%), Grace & White, Inc. (6.7%) and Royce & Associates LP (5.09%).
When did CVI Investments, Inc. buy into Westport Fuel Systems Inc.?
The filings give report dates, not purchase dates. The earliest filing from CVI Investments, Inc. on this page is the Schedule 13G, filed 2026-06-29, reporting 9.9%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 4 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Westport Fuel Systems Inc.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| September 29, 2026 | Form D, private offering | — | Form D page | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.