Alma Rosa Winery & Vineyards, a Santa Barbara County operation owned by pinot noir pioneer Richard Sanford, has filed for Chapter 11 bankruptcy protections.

The company listed assets between $1 million and $10 million and debts between $1 million and $10 million in its July 27 filing. The winery is nestled on Santa Rosa Road in Buellton near the Sta. Rita Hills.

The largest unsecured creditors listed were Robert Szerwo, who is owed $110,971 and lists himself as a business manager at the winery in an online profile. Hillside Road, a wine investment partnership owned by John Grunau and Scott and Andrew Larson, is the second largest unsecured creditor with a $74,543 claim, according to court records.

Sanford did not immediately return a request for comment from the Business Times.