Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in WPRT held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | GRACE & WHITE INC /NY | 1.0M | $1.8M | -13.2% | 5.787% | 0.32% |
| 2 | ROYCE & ASSOCIATES LP | 492K | $895K | +116.2% | 2.828% | 0.01% |
| 3 | CITADEL ADVISORS LLC | 205K | $373K | +36.6% | 1.180% | 0.00% |
| 4 | US BANCORP \DE\ | 167K | $304K | 0.0% | 0.959% | 0.00% |
| 5 | Baird Financial Group, Inc. | 164K | $298K | -7.5% | 0.942% | 0.00% |
| 6 | GOLDMAN SACHS GROUP INC | 38K | $70K | -1.3% | 0.220% | 0.00% |
| 7 | Bucket List Wealth Management, LLC | 22K | $35K | — | 0.128% | 0.01% |
| 8 | TD Waterhouse Canada Inc. | 18K | $32K | +0.1% | 0.104% | 0.00% |
| 9 | UBS Group AG | 16K | $30K | -0.6% | 0.094% | 0.00% |
| 10 | Centiva Capital, LP | 13K | $24K | — | 0.075% | 0.00% |
| 11 | LPL Financial LLC | 10K | $18K | -0.5% | 0.058% | 0.00% |
| 12 | ROYAL BANK OF CANADA | 8K | $14K | -38.7% | 0.045% | 0.00% |
| 13 | MORGAN STANLEY | 4K | $7K | +91.3% | 0.023% | 0.00% |
| 14 | Tower Research Capital LLC (TRC) | 4K | $7K | +2.8% | 0.021% | 0.00% |
| 15 | Federation des caisses Desjardins du Quebec | 2K | $3K | 0.0% | 0.010% | 0.00% |
| 16 | WELLS FARGO & COMPANY/MN | 1K | $3K | -1.2% | 0.008% | 0.00% |
| 17 | Allworth Financial LP | 1K | $2K | 0.0% | 0.006% | 0.00% |
| 18 | SWAN Capital LLC | 1K | $2K | 0.0% | 0.006% | 0.00% |
| 19 | GROUP ONE TRADING, L.P. | 897 | $2K | — | 0.005% | 0.00% |
| 20 | JONES FINANCIAL COMPANIES LLLP | 710 | $1K | — | 0.004% | 0.00% |
| 21 | ADVISOR GROUP HOLDINGS, INC. | 483 | $878 | +37.2% | 0.003% | 0.00% |
| 22 | ORG Wealth Partners, LLC | 400 | $728 | — | 0.002% | 0.00% |
| 23 | HighMark Wealth Management LLC | 350 | $637 | 0.0% | 0.002% | 0.00% |
| 24 | COUNTRY TRUST BANK | 220 | $400 | 0.0% | 0.001% | 0.00% |
| 25 | DEUTSCHE BANK AG\ | 184 | $335 | 0.0% | 0.001% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in WPRT — a direct measure of their conviction.
Filings activity in WPRT during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 41 | 13% | 12.16% | +2.12 pp | $4M | +21% |
| Q4 2025 | 47 | +21% | 10.04% | 5.58 pp | $3M | 36% |
| Q3 2025 | 39 | 13% | 15.62% | 5.79 pp | $5M | 27% |
| Q2 2025 | 45 | 6.3% | 21.41% | 103.84 pp | $7M | 83% |
| Q1 2025 | 48 | 4.0% | 125.25% | +96.30 pp | $41M | +333% |
| Q4 2024 | 50 | +14% | 28.95% | +0.71 pp | $9M | +2.5% |
| Q3 2024 | 44 | +0.0% | 28.24% | 0.94 pp | $9M | 3.2% |
| Q2 2024 | 44 | — | 29.18% | — | $9M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying WPRT stock.
Based on Q1 2026 13F filings, institutional ownership of Westport Fuel Systems Inc. stands at 12.2%, held across 41 reporting institutions.
GRACE & WHITE INC /NY is the largest reported institutional holder of WPRT, with approximately 1,006,708 shares worth $0.00B as of Q1 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of WPRT, including CITADEL ADVISORS LLC.
Our composite Smart Money Score for WPRT is 51 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
7 institutions opened new positions in WPRT during Q1 2026, while 13 fully exited. 31 added to existing positions and 1 trimmed.
WPRT institutional ownership rose by 2.12 percentage points quarter-over-quarter, with a net change of -6 holders.
The top 10 institutions account for 98.4% of all reported 13F value in WPRT, and the top 25 account for 100.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Westport Fuel Systems Inc. (WPRT) Institutional Ownership