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

FORM 10-D

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: ~~July~~August 1816, 2025 to ~~August~~September 1517, 2025

Commission File Number of issuing entity: 333-280224-04

Central Index Key Number of issuing entity: 0002048804

BMO 2025-5C9 Mortgage Trust
(Exact name of issuing entity as specified in its charter)

Commission File Number of depositor: 333-280224

Central Index Key Number of depositor: 0001861132

BMO Commercial Mortgage Securities LLC
(Exact name of depositor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0000927971

Bank of Montreal
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001701238

Citi Real Estate Funding Inc.
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001541502

Goldman Sachs Mortgage Company
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0002058685

3650 Capital SCF LOE I(A), LLC
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001685185

UBS AG
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001541294

German American Capital Corporation
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001755531

Societe Generale Financial Corporation
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor (if applicable): 0001555524

LoanCore Capital Markets LLC
(Exact name of sponsor as specified in its charter)

Paul Vanderslice (212) 885-4000
(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)

38-4345608
38-4345609
(I.R.S. Employer Identification No.)

c/o Computershare Trust Company, N.A.
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-3			X
X-A			X
X-B			X
A-S			X
B			X
C			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

Part I - DISTRIBUTION INFORMATION

Item 1. Distribution and Pool Performance Information.

On ~~August~~September 1517, 2025 a distribution was made to holders of the certificates issued by BMO 2025-5C9 Mortgage Trust.

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

NoThe ~~assets~~following ~~securitized~~table bypresents ~~BMO~~the ~~Commercial~~loss ~~Mortgage~~information ~~Securities~~for ~~LLC (~~the ~~"Depositor")~~trust ~~and~~assets ~~held~~for bythe BMO 2025-5C9 ~~Mortgage~~MORTGAGE ~~Trust~~TRUST in ~~were~~accordance ~~the~~with ~~subject~~Item of1100(b) aas ~~demand~~required toby ~~repurchase~~Item or1121(a)(9) ~~replace for breach~~ of ~~the~~Regulation ~~representations~~AB: ~~and warranties contained in the underlying transaction documents during the monthly distribution period from July 18, 2025 to August 15, 2025.~~

TheLoss DepositorInformation mostas recentlyreported filed a Form ABS-15G under Rule 15Ga-1 under the Securities Exchange Act of 1934 ("Rule 15Ga-1") on FebruarySeptember 717, 2025. The CIK number of the Depositor is 0001861132.

Bank of Montreal one of the sponsors, most recently filed a Rule 15Ga-1 Form ABS-15G on February 12, 2025. The Central Index Key number for Bank of Montreal is 0000927971.

Number of Delinquencies 30+ days	% of Delinquencies 30+ days by Pool Balance	Number of Loans/REOs with Losses	Average Net Loss
1	2.62%	0	N/A

~~Citi~~No ~~Real~~assets ~~Estate~~securitized ~~Funding~~by ~~Inc.~~BMO Commercial Mortgage Securities LLC (~~"CREFI~~the "Depositor") ~~one~~ ofand ~~the~~held ~~sponsors,~~by ~~most~~BMO ~~recently~~2025-5C9 ~~filed~~Mortgage Trust were the subject of a ~~Rule~~demand ~~15Ga-1~~to ~~Form~~repurchase ~~ABS-15G~~or onreplace ~~February~~for ~~13,~~breach ~~2025.~~of ~~The~~the ~~Central~~representations ~~Index~~and ~~Key~~warranties ~~number~~contained ~~for CREFI~~in isthe underlying transaction documents during the monthly distribution period from August 16, 2025 ~~0001701238~~to September 17, 2025.

~~Goldman~~The ~~Sachs~~Depositor ~~Mortgage Company ("GSMC") one of the sponsors,~~ most recently filed a Form ABS-15G under Rule 15Ga-1 ~~Form~~under ~~ABS~~the Securities Exchange Act of 1934 ("Rule 15Ga-~~15G~~1") on ~~August~~February 147, 2025. The ~~Central~~CIK ~~Index~~number ~~Key~~of ~~number~~the ~~for GSMC~~ Depositor is ~~0001541502~~ 0001861132.

~~3650~~Bank ~~Capital~~of ~~SCF LOE I(A), LLC~~Montreal one of the sponsors, most recently filed a Rule 15Ga-1 Form ABS-15G on ~~May~~February 12, 2025. The Central Index Key number for ~~3650~~Bank ~~Capital~~of ~~SCF LOE I(A), LLC~~Montreal is ~~0002058685~~0000927971.

~~UBS~~Citi AGReal Estate Funding Inc. ("~~UBS~~CREFI AG") one of the sponsors, most recently filed a Rule 15Ga-1 Form ABS-15G on February 1213, 2025. The Central Index Key number for ~~UBS~~CREFI AG is ~~0001685185~~0001701238.

~~German~~Goldman ~~American~~Sachs ~~Capital~~Mortgage ~~Corporation~~Company ("~~GACC~~GSMC") one of the sponsors, most recently filed a Rule 15Ga-1 Form ABS-15G on ~~February~~August 1314, 2025. The Central Index Key number for ~~GACC~~GSMC is ~~0001541294~~0001541502.

~~Societe~~3650 ~~Generale~~Capital ~~Financial~~SCF ~~Corporation~~LOE I(A), LLC one of the sponsors, most recently filed a Rule 15Ga-1 Form ABS-15G on ~~February~~May 1312, 2025. The Central Index Key number for ~~Societe~~3650 ~~Generale~~Capital ~~Financial~~SCF ~~Corporation~~LOE I(A), LLC is ~~0001755531~~0002058685.

~~LoanCore~~UBS ~~Capital Markets LLC~~AG ("~~LCM~~UBS AG") one of the sponsors, most recently filed a Rule 15Ga-1 Form ABS-15G on ~~January~~February 3112, 2025. The Central Index Key number for ~~LCM~~UBS AG is ~~0001555524~~0001685185.

~~Item~~German ~~1A.~~American ~~Asset~~Capital Corporation ("GACC") one of the sponsors, most recently filed a Rule 15Ga-~~Level~~1 ~~Information~~Form ABS-15G on February 13, 2025. The Central Index Key number for GACC is 0001541294.

~~Asset~~Societe ~~Data~~Generale ~~File~~Financial ~~(filed~~Corporation one asof ~~Exhibit~~the ~~102~~sponsors, tomost ~~the~~recently ~~registrant's~~filed a Rule 15Ga-1 Form ABS-EE15G ~~filed~~ on ~~August~~February 2813, 2025 ~~under~~. ~~Commission~~The ~~File~~Central ~~No.~~Index ~~333-280224-04~~Key ~~and~~number ~~incorporated~~for Societe byGenerale ~~reference~~Financial ~~herein)~~Corporation is 0001755531.

~~Asset~~LoanCore ~~Related~~Capital ~~Document~~Markets LLC (~~filed~~"LCM") one asof ~~Exhibit~~the ~~103~~sponsors, tomost ~~the~~recently ~~registrant's~~filed a Rule 15Ga-1 Form ABS-EE15G ~~filed~~ on ~~August~~January 2831, 2025 ~~under Commission File No~~. ~~333-280224-04~~The ~~and~~Central ~~incorporated~~Index byKey ~~reference~~number ~~herein)~~for LCM is 0001555524.

~~Part~~Item II1A. Asset-Level ~~OTHER~~Information. ~~INFORMATION~~

~~Item~~Asset 9Data File (filed as Exhibit 102 to the registrant's Form ABS-EE filed on October 1, 2025 under Commission File No. ~~Other~~333-280224-04 ~~Information~~and incorporated by reference herein).

~~Midland~~Asset ~~Loan~~Related ~~Services,~~Document A(filed ~~Division~~as ofExhibit ~~PNC~~103 ~~Bank,~~to ~~National~~the ~~Association,~~registrant's inForm ~~its~~ABS-EE ~~capacity~~filed ason ~~Master~~October ~~Servicer~~1, ~~for BMO~~ 2025~~-5C9~~ under ~~Mortgage~~Commission ~~Trust,~~File ~~affirms~~No. ~~the~~333-280224-04 ~~following~~and ~~amounts~~incorporated inby ~~the~~reference ~~respective~~herein). ~~accounts:~~

Collection Account
Prior Distribution Date	07/17/2025	$0.00
Current Distribution Date	08/15/2025	$0.00
Whole Loan Custodial Account (s) (Pinnacle Hills Promenade, AVAD Midland & Odessa Self Storage Portfolio, Commando Self Storage Portfolio, Renaissance New York Midtown Hotel, 257 Park Avenue South)
Prior Distribution Date	07/17/2025	$0.00
Current Distribution Date	08/15/2025	$0.00

Part II - OTHER INFORMATION

REO Account
Prior Distribution Date	07/17/2025	$0.00
Current Distribution Date	08/15/2025	$0.00

Item 9. Other Information.

~~Computershare~~Midland ~~Trust~~Loan ~~Company~~Services, N.A. Division of PNC Bank, National Association, in its capacity as ~~Certificate~~Master ~~Administrator~~Servicer for BMO 2025-5C9 Mortgage Trust, affirms the following amounts in the respective accounts:

Distribution Account
Collection Account
Prior Distribution Date	0708/1715/2025	$0.00	~~$7,856.38~~
Current Distribution Date	0809/1517/2025	$0.00	~~$8,117.98~~
Interest Reserve Account
Whole Loan Custodial Account (s) (Pinnacle Hills Promenade, AVAD Midland & Odessa Self Storage Portfolio, Commando Self Storage Portfolio, Renaissance New York Midtown Hotel, 257 Park Avenue South)
Prior Distribution Date	08/15/2025	~~07/17/2025~~$0.00		~~$0.00~~
Current Distribution Date	09/17/2025	~~08/15/2025~~$0.00		~~$0.00~~

Excess Liquidation Proceeds Reserve Account
REO Account
Prior Distribution Date	0708/1715/2025	$0.00
Current Distribution Date	0809/1517/2025	$0.00

~~Item~~Computershare ~~10.~~Trust ~~Exhibits~~Company, N.A., in its capacity as Certificate Administrator for BMO 2025-5C9 Mortgage Trust, affirms the following amounts in the respective accounts:

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

Distribution Account
Prior Distribution Date	08/15/2025	$8,117.98
Current Distribution Date	09/17/2025	$8,117.74

(99.1) Monthly report distributed to holders of the certificates issued by BMO 2025-5C9 MORTGAGE TRUST, relating to the August 15, 2025 distribution.

Interest Reserve Account
Prior Distribution Date	08/15/2025	$0.00
Current Distribution Date	09/17/2025	$0.00

(102) Asset Data File (filed as Exhibit 102 to the registrant's Form ABS-EE filed on August 28, 2025 under Commission File No. 333-280224-04 and incorporated by reference herein).

Excess Liquidation Proceeds Reserve Account
Prior Distribution Date	08/15/2025	$0.00
Current Distribution Date	09/17/2025	$0.00

~~(103) Asset~~Item ~~Related Document (filed as Exhibit 103 to the registrant's Form ABS-EE filed on August 28, 2025 under Commission File No~~10. ~~333-280224-04 and incorporated by reference herein)~~Exhibits.

(ba) The ~~exhibits~~following ~~required~~is toa belist ~~filed~~of bydocuments ~~the~~filed ~~Registrant~~as ~~pursuant~~part toof this ~~Form~~Report ~~are~~on ~~listed~~Form ~~above.~~10-D:

~~SIGNATURES~~(99.1) Monthly report distributed to holders of the certificates issued by BMO 2025-5C9 MORTGAGE TRUST, relating to the September 17, 2025 distribution.

~~Pursuant~~(102) Asset toData ~~the~~File ~~requirements~~(filed ofas ~~the~~Exhibit ~~Securities~~102 ~~Exchange~~to ~~Act of 1934,~~ the registrant's ~~has~~Form ~~duly~~ABS-EE ~~caused~~filed ~~this~~on ~~report~~October to1, be2025 ~~signed~~under onCommission ~~its~~File ~~behalf~~No. by333-280224-04 ~~the~~and ~~undersigned~~incorporated ~~thereunto~~by ~~duly~~reference ~~authorized~~herein).

~~BMO~~(103) Asset ~~Commercial~~Related ~~Mortgage~~Document ~~Securities LLC~~(~~Depositor~~filed as Exhibit 103 to the registrant's Form ABS-EE filed on October 1, 2025 under Commission File No. 333-280224-04 and incorporated by reference herein).

~~/s/~~(b) ~~Paul~~The ~~VanderslicePaul~~exhibits ~~Vanderslice,~~required ~~Chief~~to ~~Executive~~be ~~Officer~~filed by the Registrant pursuant to this Form are listed above.

~~Date: August 28, 2025~~ 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.

BMO Commercial Mortgage Securities LLC
(Depositor)

/s/ Paul Vanderslice
Paul Vanderslice, Chief Executive Officer

Date: October 1, 2025

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

FORM 10-D

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

Registered/reporting pursuant to (check one)

TheLoss DepositorInformation mostas recentlyreported filed a Form ABS-15G under Rule 15Ga-1 under the Securities Exchange Act of 1934 ("Rule 15Ga-1") on FebruarySeptember 717, 2025. The CIK number of the Depositor is 0001861132.

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

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

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