Schedule 13G filing

BIOTECHNOLOGY VALUE FUND L P disclosed a 8.4% stake in Alector, Inc. (ALEC)

Schedule 13G · Filed Sep 18, 2026

BIOTECHNOLOGY VALUE FUND L P reported owning 8.4% of Alector, Inc. (ALEC) (9,374,267 shares) in a Schedule 13G filed Sep 18, 2026.

A 13G is a passive stake: the holder does not plan to push for changes.

Stake

Alector, Inc.

Stake

8.4% stake

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From a public Schedule 13G, linked above. Not investment advice, and not a recommendation to buy or sell.