Sharecast - The shares were priced at 582.5p each, raising aggregate gross sale proceeds of £162.1m.
The shares were sold via Goldman Sachs (NYSE:GS) International and Rothschild and represent about 2.8% of B&M’s issued share capital.
After the sale, SSA will still hold around 3.4% of B&M’s ordinary shares.
At 0815 GMT, the shares were down 6% at 564.20p.