Kilambi News
Monday, October 19, 2026

BENCHMARK 2021-B31 MORTGAGE TRUST

Sunday, October 18, 2026

Tranches, pool and monthly delinquency indicator for BENCHMARK 2021-B31 MORTGAGE TRUST.

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

← Deal index · CMBS market

Current pool balance
$1.48B (September 2026)
Original pool balance
$1.50B
Loans at issuance
57
Closing date
2021-12-01
Weighted average coupon at issuance
3.41%
Weighted average LTV at issuance
42.8%
30+ delinquent (latest)
0.61%
Realized stress score
37.0
Net rating change since issuance
+0.04 notches

Tranches

ClassOriginal balanceCredit support (computed)CouponCUSIPFitchKBRAS&PMoody'sDBRS
A-1$19.8M98.61%1.357% fixed08163MAA5AAAAAAAAA (sf)not yet reportednot yet reported
A-2$138.1M88.90%2.588% fixed08163MAB3AAAAAAAAA (sf)not yet reportednot yet reported
A-3$23.2M87.26%2.703% fixed08163MAC1AAAAAAAAA (sf)not yet reportednot yet reported
A-4$215.0M72.14%2.420% fixed08163MAD9AAAAAAAAA (sf)not yet reportednot yet reported
A-5$575.7M31.65%2.669% fixed08163MAE7AAAAAAAAA (sf)not yet reportednot yet reported
A-AB$23.5M30.00%2.615% fixed08163MAF4AAAAAAAAA (sf)not yet reportednot yet reported
A-S$142.2M20.00%2.892% floating (WAC)08163MAH0AAAAAAA+ (sf)not yet reportednot yet reported
B$64.0M15.50%2.748% floating (WAC)08163MAJ6AA-AA-NRprelimnot yet reportednot yet reported
C$60.4M11.25%3.195% floating (WAC)08163MAK3A-A-NRnot yet reportednot yet reported
D$37.3M8.63%2.250% fixed08163MAW7BBBBBBNRnot yet reportednot yet reported
E$26.7M6.75%2.250% fixed08163MAY3BBB-BBB-NRnot yet reportednot yet reported
F$26.7M4.88%2.250% fixed08163MBA4BB-BB-NRnot yet reportednot yet reported
G$14.2M3.88%2.250% fixed08163MBC0B-BNRnot yet reportednot yet reported
H$55.1M0.00%2.250% fixed08163MBE6not yet reportednot yet reportedNRprelimnot yet reportednot yet reported
Rnot yet reportednot yet reportednot yet reported08163MBJ5not yet reportednot yet reportednot yet reportednot yet reportednot yet reported
Snot yet reportednot yet reportednot yet reported00163MBH9not yet reportednot yet reportednot yet reportednot yet reportednot yet reported
X-A$1.14BInterest only0.776% floating08163MAG2AAAAAAA+ (sf)not yet reportednot yet reported
X-B$124.4MInterest only0.427% floating08163MAL1A-AAANRprelimnot yet reportednot yet reported
X-D$64.0MInterest only1.142% floating08163MAN7BBB-BBB-NRprelimnot yet reportednot yet reported
X-F$26.7MInterest only1.142% floating08163MAQ0BB-BB-NRprelimnot yet reportednot yet reported
X-G$14.2MInterest only1.142% floating08163MAS6B-BNRprelimnot yet reportednot yet reported
X-H$55.1MInterest only1.142% floating08163MAU1not yet reportednot yet reportedNRnot yet reportednot 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

Loans57
Original loan balance$1.50B
Weighted average coupon3.41%
Weighted average LTV42.8%
Median loan LTV57.9%
Full-term interest only (share of balance)81.0%
Balloon loans (share of balance)100.0%
Largest loan (share of balance)9.9%
Five largest loans (share of balance)29.3%
Occupancy at issuance (weighted average)94.4%

Realized outcomes

Months reported58
Peak 30+ delinquency7.09% (January 2025)
Ever severe (share of original balance)5.67%
Ever modified (share of original balance)0.00%
Past scheduled maturity (share of original balance)0.00%
Non-performing matured (share of original balance)73.46%
Maximum servicer advances (share of balance)0.06%
Median DSCR, first year2.33
Median DSCR, latest2.52
Realized stress score37.0

Property types

Property typeOriginal balanceShare of pool
Office$411.8M27.5%
Multifamily$255.3M17.1%
Mixed use$254.4M17.0%
Retail$230.7M15.4%
Multiple property types$215.2M14.4%
Industrial$81.1M5.4%
Manufactured housing$18.5M1.2%
SE$13.2M0.9%
Warehouse$9.8M0.7%
Self storage$6.7M0.4%

Property type is reported for 100.0% of the pool balance; shares are of the full pool.

Largest loans

PropertyLocationOriginal balanceShare of poolCouponOriginated
350 and 450 Water StreetCambridge, MA$148.1M9.9%2.79%2021
Greenwich Office ParkGreenwich, CT$94.0M6.3%3.26%2021
Novo Nordisk HQPlainsboro, NJ$75.0M5.0%2.84%2021
One Memorial DriveCambridge, MA$63.1M4.2%2.69%2021
["5000 East Raines Road", "6125 East Shelby Drive", "4219 Air Trans Road", "4502 Maass Road", "3615 Lamar Avenue", "3638-3684 Contract Road"]["Memphis", "Memphis", "Memphis", "Bellevue", "Memphis", "Memphis"], ["TN", "TN", "TN", "NE", "TN", "TN"]$58.5M3.9%3.24%2021

Delinquency and stress indicator

0%4%7%11%15%20222023202420252026

▬ 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 CUSIP22 of 22
Classes with a current rating in the dataset20 of 22
Net rating change since issuance+0.04 notches (balance-weighted)
Delinquency threshold crossedDecember 2024
First downgradeOctober 2025

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.