<SEC-DOCUMENT>0001410368-17-000409-index.html : 20170301
<SEC-HEADER>0001410368-17-000409.hdr.sgml : 20170301
<ACCEPTANCE-DATETIME>20170301130649
ACCESSION NUMBER:		0001410368-17-000409
CONFORMED SUBMISSION TYPE:	NSAR-B
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20161231
FILED AS OF DATE:		20170301
DATE AS OF CHANGE:		20170301
EFFECTIVENESS DATE:		20170301

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Natixis Funds Trust I
		CENTRAL INDEX KEY:			0000770540
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		NSAR-B
		SEC ACT:		1940 Act
		SEC FILE NUMBER:	811-04323
		FILM NUMBER:		17652863

	BUSINESS ADDRESS:	
		STREET 1:		399 BOYLSTON STREET
		STREET 2:		12TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		617-449-2810

	MAIL ADDRESS:	
		STREET 1:		399 BOYLSTON STREET
		STREET 2:		12TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	IXIS Advisor Funds Trust I
		DATE OF NAME CHANGE:	20050502

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CDC NVEST FUNDS TRUST I
		DATE OF NAME CHANGE:	20010503

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NVEST FUNDS TRUST I
		DATE OF NAME CHANGE:	20000202
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0000770540
<SERIES-ID>S000006657
<SERIES-NAME>Loomis Sayles Multi-Asset Income Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018159
<CLASS-CONTRACT-NAME>Class A
<CLASS-CONTRACT-TICKER-SYMBOL>IIDPX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018160
<CLASS-CONTRACT-NAME>Class C
<CLASS-CONTRACT-TICKER-SYMBOL>CIDPX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000123285
<CLASS-CONTRACT-NAME>Class Y
<CLASS-CONTRACT-TICKER-SYMBOL>YIDPX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000159732
<CLASS-CONTRACT-NAME>Class N
<CLASS-CONTRACT-TICKER-SYMBOL>LMINX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000770540
<SERIES-ID>S000006658
<SERIES-NAME>Natixis U.S. Equity Opportunities Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018161
<CLASS-CONTRACT-NAME>Class A
<CLASS-CONTRACT-TICKER-SYMBOL>NEFSX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018163
<CLASS-CONTRACT-NAME>Class C
<CLASS-CONTRACT-TICKER-SYMBOL>NECCX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018164
<CLASS-CONTRACT-NAME>Class Y
<CLASS-CONTRACT-TICKER-SYMBOL>NESYX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000770540
<SERIES-ID>S000006661
<SERIES-NAME>Vaughan Nelson Small Cap Value Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018172
<CLASS-CONTRACT-NAME>Class A
<CLASS-CONTRACT-TICKER-SYMBOL>NEFJX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018174
<CLASS-CONTRACT-NAME>Class C
<CLASS-CONTRACT-TICKER-SYMBOL>NEJCX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000069268
<CLASS-CONTRACT-NAME>Class Y
<CLASS-CONTRACT-TICKER-SYMBOL>NEJYX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000770540
<SERIES-ID>S000030606
<SERIES-NAME>Natixis Oakmark International Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000094872
<CLASS-CONTRACT-NAME>Class A
<CLASS-CONTRACT-TICKER-SYMBOL>NOIAX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000094873
<CLASS-CONTRACT-NAME>Class C
<CLASS-CONTRACT-TICKER-SYMBOL>NOICX
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0000770540
<SERIES-ID>S000053352
<SERIES-NAME>Mirova Global Sustainable Equity Fund
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000167845
<CLASS-CONTRACT-NAME>Class A
<CLASS-CONTRACT-TICKER-SYMBOL>ESGMX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000167846
<CLASS-CONTRACT-NAME>Class C
<CLASS-CONTRACT-TICKER-SYMBOL>ESGCX
</CLASS-CONTRACT>
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000167847
<CLASS-CONTRACT-NAME>Class Y
<CLASS-CONTRACT-TICKER-SYMBOL>ESGYX
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>NSAR-B
<SEQUENCE>1
<FILENAME>ntianswer.fil
<DESCRIPTION>NSAR-B
<TEXT>
Document 1 - file: ntianswer.fil

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77B ACCT LTTR
<SEQUENCE>2
<FILENAME>pwcletter.txt
<DESCRIPTION>ACCOUNTING LETTER
<TEXT>
Document 2 - file: pwcletter.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.77O RULE 10F-3
<SEQUENCE>3
<FILENAME>exhibit77oi.txt
<DESCRIPTION>EXHIBIT77OI
<TEXT>
Document 3 - file: exhibit77oi.txt

</DOCUMENT>
</SEC-DOCUMENT>