# Thermo Fisher institutional stake shifts > Live situation record from CLSTR: https://clstr.news/situations/thermo-fisher-institutional-stake-cuts > Updated: 2026-08-06T07:44:55.000Z. Sources: 2. Developments: 2. In late July 2026 First Trust Advisors LP disclosed a 37.9% reduction in its Thermo Fisher Scientific holdings, trimming its position to about 43,500 shares valued at roughly $21 million, and the company’s chief operating officer, Gianluca Pettiti, sold 400 shares under a Rule 10b5‑1 plan. A week later Edgestream Partners L.P. sold most of its Thermo Fisher stake, retaining only 645 shares (about $317,000) after a 73.2% cut. The July 28 filing reiterated First Trust’s cut and Pettiti’s insider sale, confirming the earlier trend. On August 6, Sarasin & Partners LLP moved in the opposite direction, increasing its Thermo Fisher position by 6.8% to 266,872 shares (about $133.8 million), while UMB Financial Corporation director Susan Murphy sold 1,377 shares, reducing her personal holding by 11.5%. The mixed activity shows that while several institutions continued to scale back exposure, at least one major investor expanded its stake, highlighting divergent views on the company’s outlook during the first half of 2026. ## Timeline ### 2026-08-06: Thermo Fisher Scientific stake rises as Sarasin & Partners adds shares; UMB Financial director sells stock Sarasin & Partners boosted its Thermo Fisher stake to 266,872 shares (0.07%). UMB director Susan Murphy sold 1,377 shares, reducing her holding to 10,635 shares; a 3‑for‑2 split is set for Sep 1. 2 sources. https://clstr.news/cluster/edgestream-partners-lp-cuts-stakes-in-thermo-fisher-scientific-and-merck ### 2026-07-28: Thermo Fisher Scientific stock drops as COO sells shares and investor trims holdings Thermo Fisher saw a 37.9% institutional stake cut by First Trust Advisors and a $226,000 insider sale by COO Gianluca Pettiti, lowering his holdings to 24,651 shares. 2 sources. https://clstr.news/cluster/thermo-fisher-scientific-stock-drops-as-coo-sells-shares-and-investor-trims-holdings --- Cite as: Thermo Fisher institutional stake shifts. CLSTR, https://clstr.news/situations/thermo-fisher-institutional-stake-cuts