Alector Inc. (ALEC)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Fmr Llc	14,689,865	$27,763,845	0%
2.	Blackrock, Inc.	9,136,747	$17,268,452	0%
3.	Vanguard Group Inc	5,616,379	$10,614,955	0%
4.	Merck & Co., Inc.	3,545,719	$6,701,409	2.59%
5.	Geode Capital Management, Llc	1,914,250	$3,618,908	0%