Calamos Advisors
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Calamos Advisors’s Thermo Fisher Scientific TMO Stock Holding History

Calamos Advisors’s Portfolio TMO Stock Details TMO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-16,000
Closed -$7.96M – 998
2025
Q2 		$7.96M Buy
+16,000
New +$6.69M 0.03% 466

Other funds holding TMO

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

Calamos Advisors's TMO Position: Q2 2026 in Review

Calamos Advisors reduced its Thermo Fisher Scientific (TMO) stake by 17% in Q2 2026, selling an estimated $11.5M and leaving 115,172 shares worth $57.7M. The position accounts for 0.19% of the portfolio, ranked #108.

Calamos Advisors first reported a position in TMO in Q2 2013 and has held it in 53 quarters since. The position peaked at $115M in Q4 2021. 2,620 funds tracked by Wall St. Rank hold TMO as of Q2 2026.

  • Calamos Advisors held 115,172 shares of Thermo Fisher Scientific worth $57.7M as of Q2 2026.
  • Calamos Advisors sold 24,058 Thermo Fisher Scientific shares in Q2 2026, an estimated $11.5M.
  • Thermo Fisher Scientific made up 0.19% of Calamos Advisors's portfolio in Q2 2026, its #108 holding.
  • Calamos Advisors first reported a position in Thermo Fisher Scientific in Q2 2013 and has held it in 53 quarters since.
  • Calamos Advisors's Thermo Fisher Scientific position peaked at $115M in Q4 2021.
  • 2,620 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q2 2026.

Based on Calamos Advisors's 13F filing for Q2 2026, filed 31 Jul 2026.