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Equibles

CITADEL ADVISORS LLC

Position in ALEC — Alector, Inc.

CIK 1423053 MIAMI, FL
Back to ALEC Full portfolio

Position in ALEC

as of Jun 30, 2026 · filed Sep 2, 2026
Position Value
$786,376
+$619,656 QoQ
Shares Held
391,232
+404.5% QoQ
Ownership
0.350%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#40
of 140 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in ALEC Over Time

Shares Held

Position Value (USD)

Derivatives in ALEC

reported options exposure · as of Jun 30, 2026
CallValue
$0
CallShares
0
PutValue
$218,889
PutShares
108,900

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 Jun 30, 2026

CITADEL ADVISORS LLC holds $6,150,763,744 across 435 Biotechnology names. ALEC ranks #248 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 ONC
BeOne Medicines Ltd.
 1,425,517 $406,229,578
2 BBIO
BridgeBio Pharma, Inc.
 3,760,028 $280,046,885
3 INSM
INSMED Inc
 2,556,973 $272,624,460
4 MDGL
Madrigal Pharmaceuticals, Inc.
 507,233 $272,358,759
5 VRTX
Vertex Pharmaceuticals Inc / Ma
 510,430 $253,545,893
6 JAZZ
Jazz Pharmaceuticals plc
 1,006,676 $242,578,715
7 MANE
Veradermics, Inc
 1,877,775 $230,853,658
8 ROIV
Roivant Sciences Ltd.
 5,576,261 $197,343,876

All Filings in ALEC

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $218,889 108,900
2026-06-30 $786,376 391,232
2026-03-31 $68,155 31,700
2026-03-31 $166,720 77,545
2025-12-31 $51,324 32,900
2025-12-31 $83,460 53,500
2025-12-31 $145,932 93,547
2025-09-30 $189,144 63,900
2025-09-30 $49,728 16,800
2025-09-30 $1,395,879 471,581
2025-06-30 $772,547 551,820
2025-06-30 $18,760 13,400
2025-06-30 $41,720 29,800
2025-03-31 $28,536 23,200
2025-03-31 $69,372 56,400
2025-03-31 $6,688 5,438
2024-12-31 $803,194 424,971
2024-12-31 $55,944 29,600
2024-12-31 $67,095 35,500
2024-09-30 $912,352 195,784
2024-09-30 $21,902 4,700
2024-09-30 $77,822 16,700
2024-06-30 $38,136 8,400
2024-06-30 $21,792 4,800
2024-03-31 $187,637 31,169
2024-03-31 $1,204 200
2024-03-31 $65,618 10,900
2023-12-31 $246,582 30,900
2023-12-31 $128,478 16,100
2023-09-30 $103,032 15,900
2023-09-30 $149,040 23,000
2023-09-30 $51,580 7,960
2023-06-30 $51,686 8,600
2023-06-30 $1,329,116 221,151
2023-06-30 $179,098 29,800
2023-03-31 $216,650 35,000
2023-03-31 $51,377 8,300
2022-12-31 $1,963,221 212,700
2022-12-31 $4,530,434 490,838
2022-12-31 $74,763 8,100
2022-09-30 $811,894 85,824
2022-09-30 $2,025,386 214,100
2022-06-30 $1,238,270 121,877
2022-06-30 $2,265,680 223,000
2022-03-31 $216,600 15,200
2022-03-31 $1,495,437 104,943
2022-03-31 $1,313,850 92,200
2021-12-31 $912,730 44,200
2021-12-31 $334,530 16,200
2021-12-31 $638,931 30,941