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Weiss Asset Management’s Avantor AVTR Stock Holding History

Weiss Asset Management’s Portfolio AVTR Stock Details AVTR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-527,903
Closed -$4.14M – 651
2026
Q1 		$4.14M Sell
527,903
-227,493
-30% -$2.24M 0.07% 198
2025
Q4 		$8.66M Buy
755,396
+204,788
+37% +$2.52M 0.11% 149
2025
Q3 		$6.87M Buy
+550,608
New +$7.09M 0.08% 124
2024
Q4 		– Sell
-68,342
Closed -$1.77M – 638
2024
Q3 		$1.77M Buy
+68,342
New +$1.68M 0.04% 344
2023
Q1 		– Sell
-100,000
Closed -$2.11M – 341
2022
Q4 		$2.11M Buy
+100,000
New +$2.07M 0.09% 238
2022
Q3 		– Sell
-48,545
Closed -$1.51M – 662
2022
Q2 		$1.51M Buy
48,545
+30,566
+170% +$954K 0.04% 400
2022
Q1 		$608K Buy
+17,979
New +$641K 0.01% 610

Other funds holding AVTR

Dodge & Cox
Dodge & Cox San Francisco, California $191B AUM 17.5% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
GA
Greenhaven Associates Purchase, New York $8.66B AUM 17.37% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
ECM
Engine Capital Management New York $1.03B AUM 4.33% 1-Year Est. Return
Barrow, Hanley, Mewhinney & Strauss
Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $33B AUM 40.62% 1-Year Est. Return
NMC
New Mountain Capital New York $139M AUM 26.45% 1-Year Est. Return

Weiss Asset Management's AVTR Position: Q2 2026 in Review

Weiss Asset Management sold out of Avantor (AVTR) in Q2 2026, closing a stake of 527,903 shares — an estimated $4.14M sold.

Weiss Asset Management first reported a position in AVTR in Q1 2022 and held it in 7 quarters. The position peaked at $8.66M in Q4 2025. 460 funds tracked by Wall St. Rank hold AVTR as of Q2 2026.

  • Weiss Asset Management reported no remaining Avantor position as of Q2 2026 after selling out during the quarter.
  • Weiss Asset Management sold 527,903 Avantor shares in Q2 2026, an estimated $4.14M.
  • Weiss Asset Management first reported a position in Avantor in Q1 2022 and held it in 7 quarters.
  • Weiss Asset Management's Avantor position peaked at $8.66M in Q4 2025.
  • 460 funds tracked by Wall St. Rank held Avantor as of Q2 2026.

Based on Weiss Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.