BlackRock Inc. acquired 12,114,392 shares of National Vision Holdings, Inc. according to a recent SEC filing. The investment is valued at approximately $230.3 million. This purchase gives BlackRock a 15.12% ownership stake in the optical retailer.

National Vision shares fell 4.3% on August 27. The stock closed at a price of $17.87. Shares have experienced a 30.8% decline since the start of the year.

Other large institutional investors also recently adjusted their positions in the company.