<SEC-DOCUMENT>0000053417-19-000081-index.html : 20190409
<SEC-HEADER>0000053417-19-000081.hdr.sgml : 20190409
<ACCEPTANCE-DATETIME>20190409145901
ACCESSION NUMBER:		0000053417-19-000081
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20190409
DATE AS OF CHANGE:		20190409

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AILERON THERAPEUTICS INC
		CENTRAL INDEX KEY:			0001420565
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90032
		FILM NUMBER:		19739348

	BUSINESS ADDRESS:	
		STREET 1:		490 ARSENAL WAY
		CITY:			WATERTOWN
		STATE:			MA
		ZIP:			02472
		BUSINESS PHONE:		617-995-0900

	MAIL ADDRESS:	
		STREET 1:		490 ARSENAL WAY
		CITY:			WATERTOWN
		STATE:			MA
		ZIP:			02472

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			JENNISON ASSOCIATES LLC
		CENTRAL INDEX KEY:			0000053417
		IRS NUMBER:				132631108
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		466 LEXINGTON AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		2124211000

	MAIL ADDRESS:	
		STREET 1:		466 LEXINGTON AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	JENNISON ASSOCIATES CAPITAL CORP
		DATE OF NAME CHANGE:	19940511
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>ALRN0319.txt
<DESCRIPTION>13G INITIAL MONTHLY FILING - ALRN
<TEXT>
Document 1 - file: ALRN0319.txt

</DOCUMENT>
</SEC-DOCUMENT>