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GROUP ONE TRADING LLC

Position in WPRT — Westport Fuel Systems Inc.

CIK 932540 CHICAGO, IL

Position in WPRT

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$4,513
+$2,881 QoQ
Shares Held
1,997
+122.6% QoQ
Ownership
0.011%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#18
of 44 holders
Holding Since
Mar 2020
22 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in WPRT Over Time

Shares Held

Position Value (USD)

Position in Auto Parts

Consumer Cyclical · as of Jun 30, 2026

GROUP ONE TRADING LLC holds $29,750,856 across 22 Auto Parts names. WPRT ranks #18 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in WPRT

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22 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $4,513 1,997
2026-03-31 $1,632 897
2025-09-30 $331 146
2025-06-30 $144 46
2025-03-31 $215 58
2024-03-31 $18,636 2,765
2023-12-31 $63,095 9,531
2023-09-30 $57,757 9,531
2023-06-30 $69,306 9,036
2023-03-31 $77,167 81,229
2022-12-31 $114,647 148,893
2022-09-30 $188,616 216,800
2022-06-30 $225,430 223,199
2022-03-31 $402,688 254,866
2021-12-31 $378,690 159,785
2021-09-30 $790,290 240,210
2021-06-30 $1,037,058 195,303
2021-03-31 $456,636 63,510
2020-12-31 $487,343 91,434
2020-09-30 $146,533 89,898
2020-06-30 $173,990 140,315
2020-03-31 $148,050 157,500