UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington D.C. 20549

FORM 10-D/A

Amendment No. 1

ASSET BACKED ISSUER
DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934

For the monthly distribution period from: December 18, 2024 to January 17, 2025

Commission File Number of issuing entity: 333-180779-13

Central Index Key Number of issuing entity: 0001629069

Morgan Stanley Bank of America Merrill Lynch Trust 2015-C20
(Exact name of issuing entity as specified in its charter)

Commission File Number of depositor: 333-180779

Central Index Key Number of depositor: 0001547361

Morgan Stanley Capital I Inc.
(Exact name of depositor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001541557

Morgan Stanley Mortgage Capital Holdings LLC
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001102113

Bank of America, National Association
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001548567

CIBC Inc.
(Exact name of sponsor as specified in its charter)

Jane Lam (212) 761-4000
(Name and telephone number, including area code, of the person to contact in connection with this filing)

New York
(State or other jurisdiction of incorporation or organization of the issuing entity)

38-3952086
38-3952087
38-3952088
38-7127946
(I.R.S. Employer Identification No.)

c/o Computershare Trust Company, N.A., as agent for
Wells Fargo Bank, National Association
9062 Old Annapolis Road
Columbia, MD 21045
(Address of principal executive offices of the issuing entity) (Zip Code)

(667) 786-1992
(Telephone number, including area code)

Not Applicable
(Former name, former address, if changed since last report)

Registered/reporting pursuant to (check one)

Title of Class	Section 12(b)	Section 12(g)	Section 15(d)	Name of Exchange (If Section 12(b))
A-1			X
A-2			X
A-SB			X
A-3			X
A-4			X
A-S			X
B			X
C			X
PST			X
X-A			X

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes X No

Explanatory Note:

This Form 10-D/A amends the registrant's Asset Backed Issuer Distribution Report on Form 10-D filed by the Registrant on January 31, 2025 (SEC Accession No. 0001888524-25-001674) (the “Original Form 10-D”). The sole purpose of this amendment is to revise the shortfall amount on loan number 30308784 from $16,426.85 to $3,763.04 in interest. This represents .0071% of the total distribution amount.

Part I - DISTRIBUTION INFORMATION

Item 1. Distribution and Pool Performance Information.

On January 17, 2025 a distribution was made to holders of the certificates issued by Morgan Stanley Bank of America Merrill Lynch Trust 2015-C20.

The distribution report is attached as an Exhibit to this Form 10-D/A, please see Item 10(b), Exhibit 99.1 for the related information.

The following table presents the loss information for the trust assets for the Morgan Stanley Bank of America Merrill Lynch Trust 2015-C20 in accordance with Item 1100(b) as required by Item 1121(a)(9) of Regulation AB:

Loss Information as reported on January 17, 2025

Number of Delinquencies 30+ days	% of Delinquencies 30+ days by Pool Balance	Number of Loans/REOs with Losses	Average Net Loss
2	24.12%	9	$1,028,257.85

No assets securitized by Morgan Stanley Mortgage Capital Holdings LLC, Bank of America, National Association, and CIBC Inc. (each a "Securitizer") and held by Morgan Stanley Bank of America Merrill Lynch Trust 2015-C20 were the subject of a demand to repurchase or replace for breach of the representations and warranties during the monthly distribution period from December 18, 2024 to January 17, 2025.

Morgan Stanley Mortgage Capital Holdings LLC filed its most recent Form ABS-15G on November 13, 2024. The CIK number for Morgan Stanley Mortgage Capital Holdings LLC is 0001541557.

Bank of America, National Association filed its most recent Form ABS-15G on November 15, 2024. The CIK number for Bank of America, National Association is 0001102113.

CIBC Inc. filed its most recent Form ABS-15G on February 14, 2024. The CIK number for CIBC Inc. is 0001548567.

Part II - OTHER INFORMATION

Item 9. Other Information.

Midland Loan Services, A Division of PNC Bank, National Association, in its capacity as Master Servicer for Morgan Stanley Bank of America Merrill Lynch Trust 2015-C20, affirms the following amounts in the respective accounts:

Certificate Account Balance
Prior Distribution Date	12/17/2024	$10,903,426.01
Current Distribution Date	01/17/2025	$217,208.08

REO Account Balance
Prior Distribution Date	12/17/2024	$0.00
Current Distribution Date	01/17/2025	$0.00

Computershare Trust Company, N.A., as agent for Wells Fargo Bank, N.A., in its capacity as Certificate Administrator for Morgan Stanley Bank of America Merrill Lynch Trust 2015-C20, affirms the following amounts in the respective accounts:

Distribution Account Balance
Prior Distribution Date	12/17/2024	$1,060.33
Current Distribution Date	01/17/2025	$31,373.41

Interest Reserve Account Balance
Prior Distribution Date	12/17/2024	$0.00
Current Distribution Date	01/17/2025	$30,569.30

Excess Liquidation Proceeds Account Balance
Prior Distribution Date	12/17/2024	$0.00
Current Distribution Date	01/17/2025	$0.00

TA Unused Fees Account Balance
Prior Distribution Date	12/17/2024	$0.00
Current Distribution Date	01/17/2025	$0.00

Item 10. Exhibits.

(a) The following is a list of documents filed as part of this Report on Form 10-D/A:

(99.1) Amended monthly report distributed to holders of the certificates issued by Morgan Stanley Bank of America Merrill Lynch Trust 2015-C20, relating to the January 17, 2025 distribution.

(b) The exhibits required to be filed by the Registrant pursuant to this Form are listed above.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Morgan Stanley Capital I Inc.
(Depositor)

/s/ Jane Lam
Jane Lam, President

Date: February 10, 2025

Morgan Stanley Bank of America Merrill Lynch Trust 2015-C20 10-D/A