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Walleye Trading LLC

Position in RGEN — Repligen Corp

CIK 1388391 NEW YORK, NY

Position in RGEN

as of Jun 30, 2026 · filed Aug 3, 2026
Position Value
$5,903,485
+$5,900,536 QoQ
Shares Held
43,268
+240277.8% QoQ
Ownership
0.077%
of shares outstanding
% of Portfolio
0.09%
of 13F equity value
Holder Rank
#122
of 480 holders
Holding Since
Jun 2020
22 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in RGEN Over Time

Shares Held

Position Value (USD)

Derivatives in RGEN

reported options exposure · as of Jun 30, 2026
CallValue
$136,440
CallShares
1,000
PutValue
$40,932
PutShares
300

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Medical Instruments & Supplies

Healthcare · as of Jun 30, 2026

Walleye Trading LLC holds $11,658,016 across 7 Medical Instruments & Supplies names. RGEN ranks #1 (50.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 RGEN
Repligen Corp
This page
43,268 $5,903,485

All Filings in RGEN

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $5,903,485 43,268
2026-06-30 $40,932 300
2026-06-30 $136,440 1,000
2025-12-31 $557,124 3,400
2025-12-31 $491,580 3,000
2025-12-31 $2,949 18
2025-09-30 $66,835 500
2025-09-30 $128,456 961
2025-09-30 $227,239 1,700
2025-06-30 $211,446 1,700
2025-06-30 $85,449 687
2025-03-31 $135,892 1,068
2025-03-31 $216,308 1,700
2024-12-31 $1,928,796 13,400
2024-12-31 $489,396 3,400
2024-12-31 $1,249,543 8,681
2024-09-30 $476,224 3,200
2024-09-30 $575,784 3,869
2024-09-30 $1,577,492 10,600
2024-06-30 $1,512,720 12,000
2024-06-30 $1,001,672 7,946
2024-06-30 $3,227,136 25,600
2024-03-31 $7,264,840 39,500
2024-03-31 $12,561,736 68,300
2023-12-31 $10,428,400 58,000
2023-12-31 $1,858,053 10,334
2023-12-31 $5,124,300 28,500
2023-09-30 $3,704,933 23,300
2023-09-30 $825,102 5,189
2023-09-30 $5,247,330 33,000
2023-06-30 $1,248,101 8,823
2023-06-30 $1,075,096 7,600
2023-06-30 $2,475,550 17,500
2023-03-31 $404,064 2,400
2023-03-31 $168,360 1,000
2022-12-31 $270,896 1,600
2022-03-31 $1,053,304 5,600
2021-12-31 $105,936 400
2021-12-31 $2,118,720 8,000
2021-09-30 $3,959,163 13,700
2021-09-30 $1,762,839 6,100
2021-06-30 $538,974 2,700
2021-06-30 $1,157,796 5,800
2021-06-30 $633,194 3,172
2021-03-31 $408,261 2,100
2021-03-31 $1,730,249 8,900
2020-12-31 $153,304 800
2020-12-31 $210,409 1,098
2020-12-31 $134,141 700
2020-09-30 $51,196 347