Westport Fuel Systems Inc.
Westport Fuel Systems Inc. (WPRT) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · WPRT · as of Mar 31, 2025
Ownership Breakdown
50
Institutional Holders
▼ 1 vs Q4
$11.91M
Total Inst. Value
▲ $2.29M vs Q4
17.40M
Shares Outstanding
freeFloat 82.17%
3.21M
13F Shares Held
▲ 523,466 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
WPRT largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
GRACE & WHITE INC /NY engines & turbines | 1.04M | 6.04% | 6.04% | $3.87B | Apr 22, 2025 | — held |
BAIRD FINANCIAL GROUP, INC. engines & turbines | 954.2K | 5.52% | 5.52% | $3.54B | May 15, 2025 | ▲ 38.0K |
BANQUE TRANSATLANTIQUE SA engines & turbines | 400.0K | 2.31% | 2.31% | $1.37B | May 15, 2025 | NEW |
WEALTHQUEST CORP engines & turbines | 249.4K | 1.44% | 1.44% | $29.94B | Apr 23, 2025 | NEW |
AMH EQUITY LTD engines & turbines | 180.8K | 1.04% | 1.04% | $670.74M | May 5, 2025 | — held |
US BANCORP \DE\ engines & turbines | 166.8K | 96.53% | 96.53% | $618.94M | May 8, 2025 | — held |
SUSQUEHANNA INTERNATIONAL GROUP, LLP engines & turbines | 46.2K | 26.75% | 26.75% | $171.52M | May 14, 2025 | ▼ 38.1K |
GOLDMAN SACHS GROUP INC engines & turbines | 30.2K | 17.48% | 17.48% | $112.08M | Jun 27, 2025 | ▼ 4.0K |
CITADEL ADVISORS LLC engines & turbines | 25.8K | 14.93% | 14.93% | $95.72M | May 15, 2025 | ▲ 21.5K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP engines & turbines | 25.0K | 14.47% | 14.47% | $92.75M | May 14, 2025 | ▼ 17.3K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
8
Increased
+63.8K shares7
New Positions
first time holders11
Decreased
−135.7K shares0
Sold Out
fully exitedNet shares change (top 50)
71.9K
+63.8K / −135.7K
Net new holders
+4
7 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
WPRT insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
1
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
DOUGLAS KEVIN 10 percent owner | Jul 19, 2017 | Award | 150,000 | $1.50 | $225.0K | 150.0K | Form 4 ↗ |
DOUGLAS KEVIN 10 percent owner | Jul 19, 2017 | Award | 600,000 | $1.50 | $900.0K | 6.83M | Form 4 ↗ |
DOUGLAS KEVIN 10 percent owner | Jul 19, 2017 | Award | 600,000 | $1.50 | $900.0K | 6.36M | Form 4 ↗ |
DOUGLAS KEVIN 10 percent owner | Jul 19, 2017 | Award | 200,000 | $1.50 | $300.0K | 1.92M | Form 4 ↗ |
DOUGLAS KEVIN 10 percent owner | Jul 19, 2017 | Award | 150,000 | $1.50 | $225.0K | 150.0K | Form 4 ↗ |
DOUGLAS KEVIN 10 percent owner | Jun 1, 2016 | Award | 2,615,788 | — | — | 6.23M | Form 4 ↗ |
DOUGLAS KEVIN 10 percent owner | Jun 1, 2016 | Award | 2,232,300 | — | — | 5.76M | Form 4 ↗ |
DOUGLAS KEVIN 10 percent owner | Jun 1, 2016 | Award | 1,111,717 | — | — | 2.95M | Form 4 ↗ |
DOUGLAS KEVIN 10 percent owner | Jun 1, 2016 | Award | 653,944 | — | — | 1.72M | Form 4 ↗ |
DOUGLAS KEVIN 10 percent owner | May 11, 2015 | Purchase | 60,275 | $6.02 | $362.9K | 3.61M | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Westport Fuel Systems Inc. (WPRT) is primarily owned by institutional investors, who hold approximately 18.5% of total shares outstanding. Company insiders own approximately 17.83%, while retail and public investors account for the remaining 63.71%.
The largest institutional shareholder of Westport Fuel Systems Inc. is GRACE & WHITE INC /NY, holding approximately 1.04 million shares — equal to 6.04% of outstanding shares — as of March 31, 2025.
A total of 50 institutional investors currently hold WPRT stock, with a combined institutional value of approximately $11,912,547 as of the most recent 13F filing period.
Frequently asked questions
WPRT ownershipWestport Fuel Systems Inc. (WPRT) is primarily owned by institutional investors, who hold approximately 18.5% of shares. The largest shareholder is GRACE & WHITE INC /NY with a 6.04% stake. Company insiders hold 17.83%. Data sourced from SEC Form 13F as of March 31, 2025.