Skip to main content

CITADEL ADVISORS LLC

Position in ALEC — Alector, Inc.

CIK 1423053 MIAMI, FL

Position in ALEC

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$166,720
+$20,788 QoQ
Shares Held
77,545
-17.1% QoQ
Ownership
0.070%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2020
25 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 Mar 31, 2026
CallValue
$68,155
CallShares
31,700
PutValue
$0
PutShares
0

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 $5,780,974,653 across 374 Biotechnology names. ALEC ranks #312 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in ALEC

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
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
2021-09-30 $3,974,559 174,170
2021-09-30 $1,407,994 61,700