Parnassus Investments
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Parnassus Investments’s Thermo Fisher Scientific TMO Stock Holding History

Parnassus Investments’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
2026
Q2 		$822M Buy
1,639,589
+134,938
+9% +$64.8M 2.2% 12
2026
Q1 		$740M Sell
1,504,651
-78,454
-5% -$42.6M 2.17% 16
2025
Q4 		$917M Sell
1,583,105
-510,516
-24% -$289M 2.38% 11
2025
Q3 		$1.02B Sell
2,093,621
-71,637
-3% -$33.3M 2.35% 12
2025
Q2 		$878M Buy
2,165,258
+744,827
+52% +$311M 2.03% 17
2025
Q1 		$707M Buy
1,420,431
+9,474
+0.7% +$5.13M 1.7% 24
2024
Q4 		$734M Buy
1,410,957
+283,087
+25% +$156M 1.63% 21
2024
Q3 		$698M Sell
1,127,870
-35,837
-3% -$21.2M 1.48% 27
2024
Q2 		$644M Sell
1,163,707
-208,536
-15% -$119M 1.4% 29
2024
Q1 		$798M Sell
1,372,243
-14,041
-1% -$7.88M 1.7% 25
2023
Q4 		$736M Buy
1,386,284
+143,356
+12% +$69.4M 1.63% 25
2023
Q3 		$629M Sell
1,242,928
-23,594
-2% -$12.6M 1.54% 27
2023
Q2 		$661M Buy
1,266,522
+10,183
+0.8% +$5.5M 1.53% 29
2023
Q1 		$724M Buy
1,256,339
+134,022
+12% +$75.5M 1.79% 21
2022
Q4 		$618M Sell
1,122,317
-2,758
-0.2% -$1.46M 1.54% 29
2022
Q3 		$571M Buy
1,125,075
+162,825
+17% +$91.1M 1.49% 29
2022
Q2 		$523M Buy
962,250
+26,081
+3% +$14.4M 1.25% 30
2022
Q1 		$553M Buy
+936,169
New +$538M 1.12% 34

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

Parnassus Investments's TMO Position: Q2 2026 in Review

Parnassus Investments increased its Thermo Fisher Scientific (TMO) stake by 9% in Q2 2026, buying an estimated $64.8M and bringing the position to 1,639,589 shares worth $822M. The position accounts for 2.2% of the portfolio, ranked #12.

Parnassus Investments first reported a position in TMO in Q1 2022 and has held it in 18 quarters since. The position peaked at $1.02B in Q3 2025. 2,617 funds tracked by Wall St. Rank hold TMO as of Q2 2026.

  • Parnassus Investments held 1,639,589 shares of Thermo Fisher Scientific worth $822M as of Q2 2026.
  • Parnassus Investments bought 134,938 Thermo Fisher Scientific shares in Q2 2026, an estimated $64.8M.
  • Thermo Fisher Scientific made up 2.2% of Parnassus Investments's portfolio in Q2 2026, its #12 holding.
  • Parnassus Investments first reported a position in Thermo Fisher Scientific in Q1 2022 and has held it in 18 quarters since.
  • Parnassus Investments's Thermo Fisher Scientific position peaked at $1.02B in Q3 2025.
  • 2,617 funds tracked by Wall St. Rank held Thermo Fisher Scientific as of Q2 2026.

Based on Parnassus Investments's 13F filing for Q2 2026, filed 29 Jul 2026.