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660 Commonwealth Avenue

Updated Jan 30, 2026

Kimberly Sherman Stamler And Bruce A. Beal Lease 40,000 Square Feet To AI Proteins In Boston
LEASEDLife Sciences

Kimberly Sherman Stamler And Bruce A. Beal Lease 40,000 Square Feet To AI Proteins In Boston

660 Commonwealth Avenue

Building Size

40,000 SF

Asset Type

Life Sciences

Closing

Jan 29, 2026

About this deal

AI

The property asset involved in the transaction is located at 660 Commonwealth Avenue, Boston, MA. This life science asset encompasses a total of 40,000 square feet, where the biotech company AI Proteins will establish its new headquarters within the Beacon Building.

Summary of transaction details:

  • Property Type: Life Science
  • Transaction Amount: Not specified
  • Address: 660 Commonwealth Avenue
  • Market: Boston, MA
  • Landlord: Kimberly Sherman Stamler & Bruce A. Beal - Related Beal
  • Tenant: Chris Bahl - AI Proteins

The deal features Kimberly Sherman Stamler and Bruce A. Beal from Related Beal as the landlords who signed a lease agreement with tenant Chris Bahl, representing AI Proteins. This transaction marks an important step for AI Proteins as they move into a new space aimed at furthering their operations in the biotech sector.

Players

Chris Bahl

AI Proteins

Tenant

1 deal

Tenant

Boston Life Sciences Market Snapshot

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Purchase Price

Annual NOI

Loan Amount

Interest Rate (%)

Loan Term (yrs)

Down Payment (%)

Cap Rate

5.80%

Cash-on-Cash

-1.66%

Monthly Payment

$14,164

Annual Debt Svc

$169,964

Annual Cash Flow

$-11,334

DSCR

0.93

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