FREE WRITING PROSPECTUS

FILED PURSUANT TO RULE 433

REGISTRATION FILE NO.: 333-206677-15

----- Original Message -----

From: WELLS ABF SYNDICATE WELLS FARGO (WELLS FARGO SECURITI)

At: 03/29/17 08:13:43

BANK 2017-BNK4 - PUBLIC NEW ISSUE

**ANNOUNCEMENT** $826.084 MM FIXED-RATE CMBS OFFERING

CO-LEAD MANAGERS

& JOINT BOOKRUNNERS: WELLS FARGO SECURITIES

BofA MERRILL LYNCH

MORGAN STANLEY

CO-MANAGER: ACADEMY SECURITIES, INC.

OFFERED CERTIFICATES - PUBLIC
CLASS	FITCH/KBRA/MDYS	SIZE($MM)	C/E	WAL	CUM LTV	NOI DY
A-1	AAAsf/AAA(sf)/Aaa(sf)	33.805	30.000%	2.68	41.4%	16.1%
A-2	AAAsf/AAA(sf)/Aaa(sf)	88.384	30.000%	4.82	41.4%	16.1%
A-3	AAAsf/AAA(sf)/Aaa(sf)	235.000	30.000%	9.74	41.4%	16.1%
A-4	AAAsf/AAA(sf)/Aaa(sf)	268.432	30.000%	9.85	41.4%	16.1%
A-SB	AAAsf/AAA(sf)/Aaa(sf)	44.824	30.000%	7.24	41.4%	16.1%
A-S	AAAsf/AAA(sf)/Aa3(sf)	67.045	23.000%	9.91	45.5%	14.7%
X-A	AAAsf/AAA(sf)/Aaa(sf)	670.445	N/A	N/A	N/A	N/A
X-B	A-sf/AAA(sf)/NR	155.639	N/A	N/A	N/A	N/A
B	AA-sf/AA-(sf)/NR	43.100	18.500%	9.91	48.1%	13.9%
C	A-sf/A-(sf)/NR	45.494	13.750%	9.91	51.0%	13.1%
NON-OFFERED CERTIFICATES - PRIVATE (144A)
CLASS	FITCH/KBRA/MDYS	SIZE($MM)	C/E	WAL	CUM LTV	NOI DY
X-D	BBB-sf/BBB-(sf)/NR	56.270	N/A	N/A	N/A	N/A
D	BBB-sf/BBB-(sf)/NR	56.270	7.875%	9.92	54.4%	12.3%
NON-OFFERED ELIGIBLE VERTICAL INTEREST
CLASS	FITCH/KBRA/MDYS	SIZE($MM)	C/E	WAL	CUM LTV	NOI DY
RR	NR/NR/NR	50.409	N/A	N/A	N/A	N/A

COLLATERAL SUMMARY

INITIAL POOL BALANCE:	$1,008,188,843
NUMBER OF LOANS:	48
NUMBER OF PROPERTIES:	64
WA CUT-OFF LTV:	59.1%
WA BALLOON LTV:	53.8%
WA U/W NCF DSCR:	1.83x
WA U/W NOI DEBT YIELD:	11.3%
WA MORTGAGE RATE:	4.848%
TOP TEN LOANS %:	52.5%
WA REM TERM TO MATURITY (MOS):	113
WA REM AMORTIZATION TERM (MOS):	335
WA SEASONING (MOS):	2
LOAN SELLERS:	BANA(42.4%), MSMCH(29.4%), WFB(28.2%)
TOP 3 PROPERTY TYPES:	OFFICE(35.9%), RETAIL(21.8%), HOSPITALITY(19.6%)
TOP 5 STATES:	CA(24.3%), VA(10.3%), OH(8.3%), AL(7.5%), DC(6.9%)
MASTER SERVICER:	WELLS FARGO BANK, NATIONAL ASSOCIATION
SPECIAL SERVICER:	RIALTO CAPITAL ADVISORS, LLC
DIRECTING CERTIFICATEHOLDER:	RIALTO CAPITAL ADVISORS, LLC
DOCUMENTS & TIMING
TERM SHEET, ANNEX A-1:	ATTACHED
PRESALE REPORTS:	TODAY & TOMORROW
ANTICIPATED PRICING:	WEEK OF APRIL 3, 2017
ANTICIPATED SETTLEMENT:	APRIL 19, 2017
ROADSHOW
NEW YORK 1x1's:	TODAY, 3/29
DES MOINES,BREAKFAST:	THURS, 3/30 @ 7:30AM CT, MARRIOTT DOWNTOWN
MINNEAPOLIS, LUNCH:	THURS, 3/30 @ 1:00PM CT, KIMPTON GRAND HOTEL
HARTFORD, BREAKFAST:	THURS, 3/30 @ 8:30AM ET, MAX'S DOWNTOWN
BOSTON, LUNCH:	THURS, 3/30 @ 12:00PM ET, RITZ-CARLTON
CONFERENCE CALLS:	UPON DEMAND

PRE-RECORDED GLOBAL INVESTOR CALL: WWW.NETROADSHOW.COM

REVIEW CODE: 2017BNK4

FINAL LINK: www.netroadshow.com/nrs/wp/default.html?show=8f8a02

Wells Fargo Commercial Mortgage Securities, Inc., as depositor, has filed a registration statement (including a prospectus) with the Securities and Exchange Commission (‘‘SEC’’) (SEC File No. 333-206677) for the offering to which this communication relates. Before you invest, you should read the prospectus in the registration statement and other documents the depositor has filed with the SEC for more complete information about the depositor, the issuing entity and this offering. You may get these documents for free by visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the depositor, any underwriter, or any dealer participating in the offering will arrange to send you the prospectus after filing if you request it by calling toll free 1-800-745-2063 (8 a.m. - 5 p.m. EST) or by emailing wfs.cmbs@wellsfargo.com.

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