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Equibles

CITADEL ADVISORS LLC

Position in FULC — Fulcrum Therapeutics, Inc.

CIK 1423053 MIAMI, FL
Back to FULC Full portfolio

Position in FULC

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$9,913,366
-$3,737,848 QoQ
Shares Held
1,292,486
+7.1% QoQ
Ownership
1.94%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#19
of 168 holders
Holding Since
Jun 2021
20 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
$161,070
CallShares
21,000
PutValue
$285,324
PutShares
37,200

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

CITADEL ADVISORS LLC holds $5,780,363,972 across 373 Biotechnology names. FULC ranks #94 (0.2% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 INSM
INSMED Inc
 2,182,571 $356,894,009
2 ONC
BeOne Medicines Ltd.
 1,032,298 $306,561,536
3 BMRN
Biomarin Pharmaceutical Inc
 4,512,634 $254,918,694
4 JAZZ
Jazz Pharmaceuticals plc
 1,259,444 $238,097,887
5 MDGL
Madrigal Pharmaceuticals, Inc.
 453,843 $237,573,195
6 BBIO
BridgeBio Pharma, Inc.
 3,173,940 $235,696,783
7 TERN
Terns Pharmaceuticals, Inc.
 3,218,810 $169,695,662
8 PTGX
Protagonist Therapeutics, Inc
 1,551,900 $163,570,260

All Filings in FULC

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $285,324 37,200
2026-03-31 $161,070 21,000
2026-03-31 $9,913,366 1,292,486
2025-12-31 $299,715 26,500
2025-12-31 $789,438 69,800
2025-12-31 $13,651,214 1,207,004
2025-09-30 $7,861,915 854,556
2025-09-30 $316,480 34,400
2025-06-30 $132,784 19,300
2025-06-30 $1,143,689 166,234
2025-03-31 $1,077,857 374,256
2025-03-31 $43,488 15,100
2025-03-31 $39,744 13,800
2024-12-31 $55,460 11,800
2024-12-31 $609,120 129,600
2024-12-31 $1,566,618 333,323
2024-09-30 $4,815,190 1,348,793
2024-09-30 $696,150 195,000
2024-09-30 $721,854 202,200
2024-06-30 $717,340 115,700
2024-06-30 $155,620 25,100
2024-06-30 $11,018,093 1,777,112
2024-03-31 $498,432 52,800
2024-03-31 $12,511,577 1,325,379
2024-03-31 $33,984 3,600
2023-12-31 $2,241,675 332,100
2023-12-31 $9,476,142 1,403,873
2023-12-31 $51,975 7,700
2023-09-30 $5,568,576 1,254,184
2023-09-30 $1,554,444 350,100
2023-09-30 $68,820 15,500
2023-06-30 $47,190 14,300
2023-06-30 $1,122,000 340,000
2023-06-30 $4,965,308 1,504,639
2023-03-31 $84,930 29,800
2023-03-31 $596,957 209,459
2023-03-31 $991,230 347,800
2022-12-31 $167,440 23,000
2022-12-31 $5,942,256 816,244
2022-12-31 $2,347,072 322,400
2022-09-30 $141,575 17,500
2022-09-30 $2,661,610 329,000
2022-09-30 $5,194,847 642,132
2022-06-30 $274,630 56,047
2022-06-30 $123,480 25,200
2022-06-30 $2,334,850 476,500
2022-03-31 $1,016,950 43,000
2022-03-31 $723,690 30,600
2022-03-31 $2,653,600 112,203
2021-12-31 $252,967 14,300

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