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 $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Calamos Advisors's TMO Position: Q1 2026 in Review

Calamos Advisors reduced its Thermo Fisher Scientific (TMO) stake by 18% in Q1 2026, selling an estimated $16.6M and leaving 139,230 shares worth $68.4M. The position accounts for 0.24% of the portfolio, ranked #90.

Calamos Advisors first reported a position in TMO in Q2 2013 and has held it in 52 quarters since. The position peaked at $115M in Q4 2021. 2,587 funds tracked by Wall St. Rank hold TMO as of Q1 2026.

  • Calamos Advisors held 139,230 shares of Thermo Fisher Scientific worth $68.4M as of Q1 2026.
  • Calamos Advisors sold 30,670 Thermo Fisher Scientific shares in Q1 2026, an estimated $16.6M.
  • Thermo Fisher Scientific made up 0.24% of Calamos Advisors's portfolio in Q1 2026, its #90 holding.
  • Calamos Advisors first reported a position in Thermo Fisher Scientific in Q2 2013 and has held it in 52 quarters since.
  • Calamos Advisors's Thermo Fisher Scientific position peaked at $115M in Q4 2021.
  • 2,587 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q1 2026.

Based on Calamos Advisors's 13F filing for Q1 2026, filed 4 May 2026.