By SANDRA E. GARCIA
More than 30,000 Stop & Shop supermarket workers across three states remained on strike for a third day on Saturday, protesting what they said were unfair wages and high health insurance premiums.
The strike, by United Food and Commercial Workers International Union members working at more than 240 Stop & Shops in Connecticut, Massachusetts and Rhode Island, forced some stores to close. Union and supermarket officials could not say precisely how many.
The supermarket activated a contingency plan that included sending support-office staff members and temporary replacement workers to select locations, according to a Stop & Shop spokeswoman, Jennifer Brogan. Pharmacies and banks remained open, regardless of a store’s status, she said.
Among the workers on strike were cashiers, stockers, bakers, deli clerks and butchers. A previous three-year contract expired on Feb. 23.
Last year, while employees were seeking better wages, Stop & Shop’s parent company, Ahold Delhaize, reported profits of more than $2 billion to its shareholders, according to Erikka Knuti, a union spokeswoman.
Most full-time employees, including unionized department managers, earn an average of $21.30 an hour, Ms. Brogan said.
Stop & Shop said its latest proposed contract included, among other things, pay increases for all associates, no changes to employees’ deductibles, an increase of $2 to $4 on health insurance premiums and an increase to the company’s pension fund contributions.
The proposed pay increase — an additional 50 cents an hour for workers, according to Ms. Knuti — would not offset the higher costs of health care, the union spokeswoman said, and “makes it not really a pay increase.”
“A full-timer would pay $900 on a weekly premium for three years,” Ms. Knuti said on Saturday. “The average part-timer would pay an additional $600 over three years.”
The president of Stop & Shop, Mark McGowan, said in a statement on Saturday that the contract the union had proposed was “unsustainable” and could lead to higher prices for consumers.
Thomas Kochan, a director of the M.I.T. Sloan Institute for Work and Employment Research, which focuses on addressing the needs of a modernizing work force, said Stop & Shop didn’t have to raise prices to provide higher wages.
“It is not automatic that it has to go into price increases,” he said. “They have to find ways to have better customer service to attract more customers.”
The way the strike was unfolding was par for the…