<SEC-DOCUMENT>0001140361-16-053979-index.html : 20160218
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<ACCEPTANCE-DATETIME>20160218175252
ACCESSION NUMBER:		0001140361-16-053979
CONFORMED SUBMISSION TYPE:	3/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20160210
FILED AS OF DATE:		20160218
DATE AS OF CHANGE:		20160218

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PROTEOSTASIS THERAPEUTICS, INC.
		CENTRAL INDEX KEY:			0001445283
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	BUSINESS ADDRESS:	
		STREET 1:		200 TECHNOLOGY SQUARE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		617-225-0096

	MAIL ADDRESS:	
		STREET 1:		200 TECHNOLOGY SQUARE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PROTEOSTASIS THERAPEUTICS INC
		DATE OF NAME CHANGE:	20080916

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PERRIGO Co plc
		CENTRAL INDEX KEY:			0001585364
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		STATE OF INCORPORATION:			L2
		FISCAL YEAR END:			0627

	FILING VALUES:
		FORM TYPE:		3/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37695
		FILM NUMBER:		161439217

	BUSINESS ADDRESS:	
		STREET 1:		TREASURY BUILDING
		STREET 2:		LOWER GRAND CANAL STREET
		CITY:			DUBLIN
		STATE:			L2
		ZIP:			L2 2
		BUSINESS PHONE:		269-673-8451

	MAIL ADDRESS:	
		STREET 1:		515 EASTERN AVENUE
		CITY:			ALLEGAN
		STATE:			MI
		ZIP:			49010

	FORMER NAME:	
		FORMER CONFORMED NAME:	PERRIGO Co Ltd
		DATE OF NAME CHANGE:	20130828

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PERRIGO HOLDINGS LTD.
		CENTRAL INDEX KEY:			0001323996
		STATE OF INCORPORATION:			L2
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37695
		FILM NUMBER:		161439218

	BUSINESS ADDRESS:	
		STREET 1:		TREASURY BUILDING,
		STREET 2:		LOWER GRAND CANAL ST
		CITY:			DUBLIN
		STATE:			L2
		ZIP:			L2 2
		BUSINESS PHONE:		269-673-8451

	MAIL ADDRESS:	
		STREET 1:		515 EASTERN AVENUE
		CITY:			ALLEGAN
		STATE:			MI
		ZIP:			49010

	FORMER NAME:	
		FORMER CONFORMED NAME:	Elan Holdings LTD
		DATE OF NAME CHANGE:	20050415

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ELAN PHARMA INTERNATIONAL LTD.
		CENTRAL INDEX KEY:			0001307004
		STATE OF INCORPORATION:			L2
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37695
		FILM NUMBER:		161439219

	BUSINESS ADDRESS:	
		STREET 1:		TREASURY BUILDING,
		STREET 2:		LOWER GRAND CANAL STREET
		CITY:			DUBLIN
		STATE:			L2
		ZIP:			L2 2
		BUSINESS PHONE:		269-673-8451

	MAIL ADDRESS:	
		STREET 1:		515 EASTERN AVENUE
		CITY:			ALLEGAN
		STATE:			MI
		ZIP:			49010

	FORMER NAME:	
		FORMER CONFORMED NAME:	Elan Pharma International LTD
		DATE OF NAME CHANGE:	20041026

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PERRIGO CORP LTD.
		CENTRAL INDEX KEY:			0000737186
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731]
		FISCAL YEAR END:			0331

	FILING VALUES:
		FORM TYPE:		3/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37695
		FILM NUMBER:		161439220

	BUSINESS ADDRESS:	
		STREET 1:		TREASURY BUILDING,
		STREET 2:		LOWER GRAND CANAL ST
		CITY:			DUBLIN
		STATE:			L2
		ZIP:			L2 2
		BUSINESS PHONE:		269-673-8451

	MAIL ADDRESS:	
		STREET 1:		515 EASTERN AVENUE
		CITY:			ALLEGAN
		STATE:			MI
		ZIP:			49010

	FORMER NAME:	
		FORMER CONFORMED NAME:	ELAN Corp Ltd
		DATE OF NAME CHANGE:	20140818

	FORMER NAME:	
		FORMER CONFORMED NAME:	ELAN CORP LTD
		DATE OF NAME CHANGE:	19840104

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PERRIGO SCIENCE ONE LTD.
		CENTRAL INDEX KEY:			0001565579
		STATE OF INCORPORATION:			L2
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-37695
		FILM NUMBER:		161439221

	BUSINESS ADDRESS:	
		STREET 1:		TREASURY BUILDING,
		STREET 2:		LOWER GRAND CANAL STREET
		CITY:			DUBLIN
		STATE:			L2
		ZIP:			L2 2
		BUSINESS PHONE:		353 1 709 4000

	MAIL ADDRESS:	
		STREET 1:		TREASURY BUILDING,
		STREET 2:		LOWER GRAND CANAL STREET
		CITY:			DUBLIN
		STATE:			L2
		ZIP:			L2 2

	FORMER NAME:	
		FORMER CONFORMED NAME:	Elan Science One Ltd
		DATE OF NAME CHANGE:	20121228
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