ALECTOR INC

Ticker: ALEC CUSIP: 014442107 Class: COM

ALLIANCEBERNSTEIN L.P.'s Holding History (CIK: 0001109448)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 92,940 Value ($000) $145 Avg Close $1.77 Range $1.09 - $3.40

Q3 2025

Shares 92,940 Value ($000) $275 Avg Close $2.20 Range $1.34 - $3.28

Q2 2025

Shares 92,940 Value ($000) $130 Avg Close $1.25 Range $0.87 - $1.69

Q1 2025

Shares 82,100 Value ($000) $101 Avg Close $1.63 Range $1.20 - $2.15

Q4 2024

Shares 82,100 Value ($000) $155 Avg Close $3.76 Range $1.68 - $6.14

Q3 2024

Shares 711,545 Value ($000) $3,316 Avg Close $5.36 Range $4.22 - $6.78

Q2 2024

Shares 766,973 Value ($000) $3,482 Avg Close $5.15 Range $4.11 - $6.25

Q1 2024

Shares 725,686 Value ($000) $4,369 Avg Close $6.54 Range $5.49 - $8.90

Q4 2023

Shares 492,285 Value ($000) $3,928 Avg Close $5.92 Range $3.66 - $8.76

Q3 2023

Shares 329,621 Value ($000) $2,136 Avg Close $6.47 Range $4.98 - $9.06

Q2 2023

Shares 194,690 Value ($000) $1,170 Avg Close $6.98 Range $5.65 - $8.04

Q1 2023

Shares 179,783 Value ($000) $1,113 Avg Close $8.13 Range $5.76 - $9.86

Q4 2022

Shares 57,700 Value ($000) $533 Avg Close $8.72 Range $6.84 - $9.76

Q3 2022

Shares 157,700 Value ($000) $1,492 Avg Close $10.81 Range $8.15 - $13.50

Q2 2022

Shares 62,700 Value ($000) $637 Avg Close $9.97 Range $7.50 - $14.63

Q1 2022

Shares 137,700 Value ($000) $1,962 Avg Close $15.82 Range $11.41 - $21.25

Q4 2021

Shares 161,217 Value ($000) $3,329 Avg Close $22.55 Range $18.61 - $27.00

Q3 2021

Shares 104,142 Value ($000) $2,377 Avg Close $28.01 Range $20.71 - $43.32

Q2 2021

Shares 56,800 Value ($000) $1,183 Avg Close $18.85 Range $15.04 - $23.42

Q1 2021

Shares 50,000 Value ($000) $1,007 Avg Close $17.93 Range $14.66 - $23.99

Q4 2020

Shares 51,400 Value ($000) $778 Avg Close $12.43 Range $9.12 - $17.31

Q3 2020

Shares 63,100 Value ($000) $665 Avg Close $16.17 Range $10.45 - $25.73

Q2 2020

Shares 72,400 Value ($000) $1,769 Avg Close $27.60 Range $21.26 - $34.89

Q1 2020

Shares 35,400 Value ($000) $854 Avg Close $25.49 Range $15.63 - $35.93

Q4 2019

Shares 30,100 Value ($000) $519 Avg Close $17.00 Range $13.71 - $21.03

Q3 2019

Shares 24,500 Value ($000) $353 Avg Close $18.05 Range $13.64 - $22.41

Q2 2019

Shares 14,700 Value ($000) $279 Avg Close $20.30 Range $15.78 - $27.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	92,940	$145	$1.77	$1.09 - $3.40
Q3 2025	92,940	$275	$2.20	$1.34 - $3.28
Q2 2025	92,940	$130	$1.25	$0.87 - $1.69
Q1 2025	82,100	$101	$1.63	$1.20 - $2.15
Q4 2024	82,100	$155	$3.76	$1.68 - $6.14
Q3 2024	711,545	$3,316	$5.36	$4.22 - $6.78
Q2 2024	766,973	$3,482	$5.15	$4.11 - $6.25
Q1 2024	725,686	$4,369	$6.54	$5.49 - $8.90
Q4 2023	492,285	$3,928	$5.92	$3.66 - $8.76
Q3 2023	329,621	$2,136	$6.47	$4.98 - $9.06
Q2 2023	194,690	$1,170	$6.98	$5.65 - $8.04
Q1 2023	179,783	$1,113	$8.13	$5.76 - $9.86
Q4 2022	57,700	$533	$8.72	$6.84 - $9.76
Q3 2022	157,700	$1,492	$10.81	$8.15 - $13.50
Q2 2022	62,700	$637	$9.97	$7.50 - $14.63
Q1 2022	137,700	$1,962	$15.82	$11.41 - $21.25
Q4 2021	161,217	$3,329	$22.55	$18.61 - $27.00
Q3 2021	104,142	$2,377	$28.01	$20.71 - $43.32
Q2 2021	56,800	$1,183	$18.85	$15.04 - $23.42
Q1 2021	50,000	$1,007	$17.93	$14.66 - $23.99
Q4 2020	51,400	$778	$12.43	$9.12 - $17.31
Q3 2020	63,100	$665	$16.17	$10.45 - $25.73
Q2 2020	72,400	$1,769	$27.60	$21.26 - $34.89
Q1 2020	35,400	$854	$25.49	$15.63 - $35.93
Q4 2019	30,100	$519	$17.00	$13.71 - $21.03
Q3 2019	24,500	$353	$18.05	$13.64 - $22.41
Q2 2019	14,700	$279	$20.30	$15.78 - $27.00