The Berkshire Mall in Lanesborough is inching closer to default, as the mall’s owner struggles to find financing to replace a $37.5 million securitized mortgage.

Fitch ratings said late yesterday that loan servicer Midland Loan Services had transferred the mortgage to special servicing because of an imminent maturity default. The 720,000-square-foot mall’s mortgage matures in early March.

The Berkshire Mall’s owner, Syracuse-based Pyramid Cos., is struggling under the weight of several commercial mortgage-backed securities (CMBS) maturities. Pyramid’s $24 million mortgage on its Hampshire Mall in Hadley matures in early April.

Pyramid was unable to refinance mortgages at two of its trophy properties in New York when the debt on those properties matured earlier this week. Pyramid is wrestling with a $550 million maturity at its 2.2 million-square-foot Palisades Center in West Nyack, N.Y., and a $140 million maturity at the 1.1 million-square-foot Galleria at Crystal Run in Middletown, N.Y.

The Massachusetts and New York mortgages were packaged into the same CMBS offering. That has left the mall operator more exposed to the commercial credit crunch than most borrowers.

The troubles at the Berkshire and Hampshire Malls come on the heels of defaults at the Hanover Mall in Hanover and Westgate Mall in Brockton. In both those cases, the properties’ lenders took them back at foreclosure auction.