Millennium Management
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Millennium Management’s Alector ALEC Stock Holding History

Millennium Management’s Portfolio ALEC Stock Details ALEC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$4.26M Buy
1,979,226
+646,312
+48% +$1.3M ﹤0.01% 3133
2025
Q4 		$2.08M Buy
1,332,914
+177,887
+15% +$316K ﹤0.01% 3909
2025
Q3 		$3.42M Buy
1,155,027
+744,224
+181% +$1.64M ﹤0.01% 3528
2025
Q2 		$575K Buy
410,803
+145,987
+55% +$183K ﹤0.01% 4811
2025
Q1 		$326K Buy
264,816
+190,131
+255% +$310K ﹤0.01% 5055
2024
Q4 		$141K Buy
74,685
+23,467
+46% +$88.3K ﹤0.01% 5409
2024
Q3 		$239K Sell
51,218
-105,562
-67% -$566K ﹤0.01% 5335
2024
Q2 		$712K Buy
156,780
+54,578
+53% +$281K ﹤0.01% 4367
2024
Q1 		$615K Sell
102,202
-133,433
-57% -$872K ﹤0.01% 4684
2023
Q4 		$1.88M Sell
235,635
-121,130
-34% -$718K ﹤0.01% 3664
2023
Q3 		$2.31M Buy
356,765
+296,300
+490% +$1.92M ﹤0.01% 3417
2023
Q2 		$363K Buy
60,465
+41,385
+217% +$289K ﹤0.01% 4763
2023
Q1 		$118K Sell
19,080
-31,422
-62% -$256K ﹤0.01% 5363
2022
Q4 		$466K Sell
50,502
-126,069
-71% -$1.1M ﹤0.01% 4795
2022
Q3 		$1.67M Sell
176,571
-438,173
-71% -$4.74M ﹤0.01% 3911
2022
Q2 		$6.25M Sell
614,744
-525,345
-46% -$5.24M ﹤0.01% 2561
2022
Q1 		$16.2M Buy
1,140,089
+748,883
+191% +$11.8M 0.01% 1609
2021
Q4 		$8.08M Buy
391,206
+176,656
+82% +$3.98M ﹤0.01% 2376
2021
Q3 		$4.9M Buy
214,550
+155,412
+263% +$4.35M ﹤0.01% 2880
2021
Q2 		$1.23M Buy
59,138
+38,185
+182% +$720K ﹤0.01% 4478
2021
Q1 		$422K Sell
20,953
-53,568
-72% -$960K ﹤0.01% 4962
2020
Q4 		$1.13M Sell
74,521
-197,246
-73% -$2.45M ﹤0.01% 3658
2020
Q3 		$2.86K Buy
271,767
+109,131
+67% +$1.77M ﹤0.01% 2315
2020
Q2 		$3.98M Buy
162,636
+108,961
+203% +$3.01M 0.01% 1981
2020
Q1 		$1.29M Sell
53,675
-152,677
-74% -$3.89M ﹤0.01% 2302
2019
Q4 		$3.56M Sell
206,352
-115,319
-36% -$1.96M ﹤0.01% 2195
2019
Q3 		$4.64M Sell
321,671
-40,706
-11% -$735K 0.01% 1867
2019
Q2 		$6.88M Sell
362,377
-391,234
-52% -$7.94M 0.01% 1538
2019
Q1 		$14.1M Buy
+753,611
New +$14.3M 0.02% 1028

Other funds holding ALEC

TCM
TCG Crossover Management Palo Alto, California $3.5B AUM 1,165.83% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
FCMI
Foresite Capital Management IV Larkspur, California $237M AUM 107.53% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
MC
Merck & Co Kenilworth, New Jersey $349M AUM 146.07% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
6CM
683 Capital Management New York $1.92B AUM 85.52% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $77.1B AUM 42.89% 1-Year Est. Return
NCM
Nantahala Capital Management New Canaan, Connecticut $2.72B AUM 121.58% 1-Year Est. Return

Millennium Management's ALEC Position: Q1 2026 in Review

Millennium Management increased its Alector (ALEC) stake by 48% in Q1 2026, buying an estimated $1.3M and bringing the position to 1,979,226 shares worth $4.26M. The position accounts for ﹤0.01% of the portfolio, ranked #3133.

Millennium Management first reported a position in ALEC in Q1 2019 and has held it in 29 quarters since. The position peaked at $16.2M in Q1 2022. 138 funds tracked by Wall St. Rank hold ALEC as of Q1 2026.

  • Millennium Management held 1,979,226 shares of Alector worth $4.26M as of Q1 2026.
  • Millennium Management bought 646,312 Alector shares in Q1 2026, an estimated $1.3M.
  • Alector made up ﹤0.01% of Millennium Management's portfolio in Q1 2026, its #3133 holding.
  • Millennium Management first reported a position in Alector in Q1 2019 and has held it in 29 quarters since.
  • Millennium Management's Alector position peaked at $16.2M in Q1 2022.
  • 138 funds tracked by Wall St. Rank held Alector as of Q1 2026.

Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.