Boston Scientific Corp (BSX)

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Institutional Investors' Holdings

Filing Period: Filing is Ongoing

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	141,671,066	$14,291,777,135	0.3%
2.	Vanguard Group Inc	134,588,729	$13,577,310,982	0.25%
3.	Primecap Management Co	36,496,946	$3,681,811,912	3.04%
4.	Massachusetts Financial Services Co	16,521,619	$1,666,700,925	0.55%
5.	Goldman Sachs Group Inc	14,143,332	$1,426,779,364	0.23%