Effissimo Becomes Tamron's Largest Shareholder, Overtaking Sony

Singaporean activist fund Effissimo Capital Management has increased its Tamron stake to 17.38% (29.7 million shares), overtaking Sony Group Corporation's 15.35% to become the Japanese lens maker's largest institutional shareholder. Effissimo has been building this position gradually; reaching the top spot is a notable structural shift in who holds the most sway over Tamron's direction.