Alector Inc. (ALEC)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Fmr Llc	14,390,239	$17,699,994	0%
2.	Blackrock, Inc.	8,279,702	$10,184,035	0%
3.	Vanguard Group Inc	6,053,041	$7,445,240	0%
4.	Merck & Co., Inc.	3,545,719	$4,361,234	2.65%
5.	Geode Capital Management, Llc	1,962,098	$2,414,018	0%