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JANE STREET GROUP, LLC

Position in FULC — Fulcrum Therapeutics, Inc.

CIK 1595888 NEW YORK, NY

Position in FULC

as of Mar 31, 2026 · filed May 12, 2026
Position Value
$2,380,897
-$3,203,414 QoQ
Shares Held
310,417
-37.1% QoQ
Ownership
0.466%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#38
of 168 holders
Holding Since
Sep 2021
18 quarters on record
Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in FULC Over Time

Shares Held

Position Value (USD)

Derivatives in FULC

reported options exposure · as of Mar 31, 2026
CallValue
$0
CallShares
0
PutValue
$163,371
PutShares
21,300

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 Biotechnology

Healthcare · as of Mar 31, 2026

JANE STREET GROUP, LLC holds $1,247,243,084 across 314 Biotechnology names. FULC ranks #73 (0.2% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in FULC

Export CSV
27 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $163,371 21,300
2026-03-31 $2,380,897 310,417
2025-12-31 $5,584,311 493,750
2025-12-31 $415,077 36,700
2025-09-30 $2,957,982 321,520
2025-06-30 $119,897 17,427
2025-03-31 $339,309 117,816
2024-12-31 $212,247 45,159
2024-12-31 $129,250 27,500
2024-09-30 $250,614 70,200
2024-09-30 $428,017 119,893
2024-09-30 $278,817 78,100
2024-06-30 $1,043,111 168,244
2024-03-31 $5,050,984 535,062
2023-12-31 $2,341,237 346,850
2023-09-30 $170,944 38,501
2023-06-30 $218,766 66,293
2023-03-31 $40,623 14,254
2022-12-31 $85,081 11,687
2022-06-30 $185,857 37,930
2022-03-31 $353,756 14,958
2021-12-31 $552,617 31,239
2021-12-31 $237,046 13,400
2021-12-31 $309,575 17,500
2021-09-30 $267,995 9,500
2021-09-30 $1,408,863 49,942
2021-09-30 $1,136,863 40,300