Updated Jan 30, 2026
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
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