On the Day the CEO Purchased $1.4 Billion in Company Stock, a 15% Surge in a Mysterious Stock

GPGI Inc. (NYSE: GPGI) shares closed at $14.79 on the New York Stock Exchange, surging 15.55% in a single day. Its market capitalization jumped to approximately $4.29 billion (around ₩6 trillion), while daily trading volume topped 2.16 million shares.

According to a recent SEC filing, Thomas R. Knott, CEO and CIO, purchased 85,250 shares of GPGI on June 11 for about $994,867 (roughly ₩1.4 billion). This insider purchase came as the stock, having fallen about 35% over the past six months, was attempting a rebound near its 52-week low—fueling perceptions of undervaluation and bolstering expectations for long-term growth.

GPGI is a diversified manufacturing platform company offering metal credit cards, security and authentication solutions, and precision injection-molding equipment. In January 2026, it completed a business combination with Canada’s Husky Technologies and rebranded from its former name, CompoSecure, to GPGI.