<SEC-DOCUMENT>0001104659-20-018877-index.html : 20200212
<SEC-HEADER>0001104659-20-018877.hdr.sgml : 20200212
<ACCEPTANCE-DATETIME>20200212114637
ACCESSION NUMBER:		0001104659-20-018877
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20200212
DATE AS OF CHANGE:		20200212

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HOLOGIC INC
		CENTRAL INDEX KEY:			0000859737
		STANDARD INDUSTRIAL CLASSIFICATION:	X-RAY APPARATUS & TUBES & RELATED IRRADIATION APPARATUS [3844]
		IRS NUMBER:				042902449
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0928

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-41074
		FILM NUMBER:		20602237

	BUSINESS ADDRESS:	
		STREET 1:		250 CAMPUS DRIVE
		CITY:			MARLBOROUGH
		STATE:			MA
		ZIP:			01752
		BUSINESS PHONE:		5082632900

	MAIL ADDRESS:	
		STREET 1:		250 CAMPUS DRIVE
		CITY:			MARLBOROUGH
		STATE:			MA
		ZIP:			01752

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PARNASSUS INVESTMENTS /CA
		CENTRAL INDEX KEY:			0000948669
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			CA

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		1 MARKET STREET #1600
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94105
		BUSINESS PHONE:		4157780200

	MAIL ADDRESS:	
		STREET 1:		1 MARKET STREET #1600
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94105
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>tm207553-2_sc13ga1.txt
<DESCRIPTION>AMENDMENT NO. 1
<TEXT>
Document 1 - file: tm207553-2_sc13ga1.txt

</DOCUMENT>
</SEC-DOCUMENT>