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Equibles

D. E. Shaw & Co., Inc.

Position in ALEC — Alector, Inc.

CIK 1009207 New York, NY
Back to ALEC Full portfolio

Position in ALEC

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$5,949,565
-$1,216,029 QoQ
Shares Held
2,959,983
-11.2% QoQ
Ownership
2.65%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#10
of 140 holders
Holding Since
Dec 2020
16 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in ALEC Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

D. E. Shaw & Co., Inc. holds $5,139,216,221 across 216 Biotechnology names. ALEC ranks #93 (0.1% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 INSM
INSMED Inc
 5,877,959 $626,707,987
2 ALNY
Alnylam Pharmaceuticals, Inc.
 1,104,109 $332,369,932
3 EXEL
Exelixis, Inc.
 5,551,747 $302,070,554
4 BBIO
BridgeBio Pharma, Inc.
 3,633,007 $270,586,360
5 TGTX
Tg Therapeutics, Inc.
 3,400,808 $186,840,390
6 HALO
Halozyme Therapeutics, Inc.
 2,006,479 $157,047,110
7 AXSM
Axsome Therapeutics, Inc.
 604,753 $148,025,391
8 PTCT
Ptc Therapeutics, Inc.
 1,548,919 $126,345,322

All Filings in ALEC

Export CSV
16 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $5,949,565 2,959,983
2026-03-31 $7,165,594 3,332,835
2025-12-31 $3,689,634 2,365,151
2025-09-30 $2,895,483 978,204
2025-06-30 $747,879 534,200
2025-03-31 $577,240 469,301
2024-12-31 $697,365 368,977
2024-09-30 $890,022 190,992
2024-06-30 $1,599,183 352,243
2024-03-31 $1,984,342 329,625
2023-12-31 $1,469,492 184,147
2023-09-30 $771,236 119,018
2023-06-30 $109,351 18,195
2021-09-30 $879,665 38,548
2021-06-30 $793,143 38,077
2020-12-31 $195,207 12,902