CSAIL 2021-C20 Commercial Mortgage Trust

Tranches, pool and monthly delinquency indicator for CSAIL 2021-C20 Commercial Mortgage Trust.

Data as of loan data through September 2026; ratings as held in the dataset at build

Current pool balance: $625.1M (September 2026)
Original pool balance: $650.1M
Loans at issuance: 29
Closing date: 2021-03-30
Weighted average coupon at issuance: 3.77%
Weighted average LTV at issuance: 43.3%
30+ delinquent (latest): 0.00%
Realized stress score: 34.1
Net rating change since issuance: +0.00 notches

Tranches

Class	Original balance	Credit support (computed)	Coupon	CUSIP	Fitch	KBRA	S&P	Moody's	DBRS
A-1	$8.3M	98.73%	0.855% fixed	22945EAS0	PIF	WR	not yet reported	WR	not yet reported
A-2	$180.9M	70.89%	2.486% fixed	22945EAT8	AAA	AAA	not yet reported	Aaa	not yet reported
A-3	$251.8M	32.16%	2.805% fixed	22945EAU5	AAA	AAA	not yet reported	Aaa	not yet reported
A-S	$59.3M	23.03%	3.076% fixed	22945EAY7	AAA	AAA	not yet reported	Aa3	not yet reported
A-SB	$14.0M	20.88%	2.436% fixed	22945EAV3	AAA	AAA	not yet reported	Aaa	not yet reported
B	$28.4M	16.50%	3.298% fixed	22945EAZ4	AA-	AA-	not yet reported	not yet reported	not yet reported
C	$26.8M	12.38%	3.854% floating (WAC)	22945EBA8	A-	A-	not yet reported	not yet reported	not yet reported
D	$17.1M	9.75%	2.250% fixed	22945EAC5	BBB	BBB	not yet reported	not yet reported	not yet reported
E	$13.0M	7.75%	2.250% fixed	22945EAE1	BBB-	BBB-	not yet reported	not yet reported	not yet reported
F-RR	$14.6M	5.50%	3.854% floating (WAC)	22945EAH4	not yet reported	not yet reported	not yet reported	not yet reported	not yet reported
G-RR	$6.5M	4.50%	3.854% floating (WAC)	22945EAK7	not yet reported	not yet reported	not yet reported	not yet reported	not yet reported
NR-RR	$29.3M	0.00%	3.854% floating (WAC)	22945EAM3	not yet reported	not yet reported	not yet reported	not yet reported	not yet reported
R	not yet reported	not yet reported	not yet reported	22945EAN1	not yet reported	not yet reported	not yet reported	not yet reported	not yet reported
X-A	$514.4M	Interest only	1.172% floating	22945EAW1	AAA	AAA	not yet reported	Aa1	not yet reported
X-B	$55.3M	Interest only	0.286% floating	22945EAX9	AA-	AAA	not yet reported	not yet reported	not yet reported
X-D	$30.1M	Interest only	1.605% floating	22945EAA9	BBB-	BBB-	not yet reported	not yet reported	not yet reported
Z	not yet reported	not yet reported	not yet reported	22945EAQ4	not yet reported	not yet reported	not yet reported	not yet reported	not yet reported

Credit support is computed from the class stack order in the prospectus: the share of the deal's principal balance in classes junior to the class. Interest-only classes carry a notional balance and no principal support figure. Ratings are the latest held in the dataset for each class and agency; NR means the agency shows the class as not rated, WR that the rating was withdrawn, PIF that the class has been paid in full. Any other status value is shown exactly as the agency reports it. A + after a CUSIP marks a class with companion CUSIPs in the dataset.

Pool at issuance

Loans	29
Original loan balance	$650.4M
Weighted average coupon	3.77%
Weighted average LTV	43.3%
Median loan LTV	63.0%
Full-term interest only (share of balance)	66.8%
Balloon loans (share of balance)	100.0%
Largest loan (share of balance)	9.2%
Five largest loans (share of balance)	36.0%
Occupancy at issuance (weighted average)	90.4%

Realized outcomes

Months reported	67
Peak 30+ delinquency	3.75% (July 2024)
Ever severe (share of original balance)	0.00%
Ever modified (share of original balance)	29.94%
Past scheduled maturity (share of original balance)	0.00%
Non-performing matured (share of original balance)	20.70%
Maximum servicer advances (share of balance)	0.03%
Median DSCR, first year	1.98
Median DSCR, latest	1.93
Realized stress score	34.1

Property types

Property type	Original balance	Share of pool
Retail	$158.4M	24.4%
Office	$141.7M	21.8%
Multifamily	$137.1M	21.1%
SE	$58.1M	8.9%
Lodging	$57.9M	8.9%
Industrial	$55.2M	8.5%
Mixed use	$17.0M	2.6%
Self storage	$10.0M	1.5%

Property type is reported for 97.7% of the pool balance; shares are of the full pool.

Largest loans

Property	Location	Original balance	Share of pool	Coupon	Originated
Grace Building	New York, NY	$60.0M	9.2%	2.69%	2020
Miami Design District	Miami, FL	$60.0M	9.2%	4.13%	2020
888 Figueroa	Los Angeles, CA	$40.0M	6.2%	3.72%	2019
["MGM Grand", "Mandalay Bay"]	["Las Vegas", "Las Vegas"], ["NV", "NV"]	$39.1M	6.0%	3.56%	2020
The Westchester	White Plains, NY	$35.0M	5.4%	3.25%	2020

Delinquency and stress indicator

▬ 30+ days delinquent · ▬ Distressed (90+, foreclosure, REO, non-performing matured)

Monthly shares of the deal's reported balance, from the deal indicator series in the dataset. Months in which fewer than half of the reported loans carry a delinquency status code are not plotted.

Ratings

Classes with a CUSIP	17 of 17
Classes with a current rating in the dataset	12 of 17
Net rating change since issuance	+0.00 notches (balance-weighted)
Delinquency threshold crossed	Not crossed in the dataset
First downgrade	None recorded

Sources: SEC Form ABS-EE asset-level reports, Form 10-D distribution reports and the deal prospectus; rating histories published under SEC Rule 17g-7(b) and agency releases. Definitions are in the methods note on the market page.