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Callan Family Office’s Avantor AVTR Stock Holding History

Callan Family Office’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
Q1 		$1.63M Buy
208,228
+124,153
+148% +$1.22M 0.04% 411
2025
Q4 		$964K Sell
84,075
-143,190
-63% -$1.76M 0.02% 558
2025
Q3 		$2.84M Buy
227,265
+5,970
+3% +$76.9K 0.09% 224
2025
Q2 		$2.98M Buy
221,295
+155,675
+237% +$2.13M 0.09% 225
2025
Q1 		$1.06M Buy
65,620
+9,952
+18% +$189K 0.08% 208
2024
Q4 		$1.17M Buy
+55,668
New +$1.25M 0.07% 221

Other funds holding AVTR

Dodge & Cox
Dodge & Cox San Francisco, California $182B AUM 14.68% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
GA
Greenhaven Associates Purchase, New York $6.07B AUM 11.2% 1-Year Est. Return
Barrow, Hanley, Mewhinney & Strauss
Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $30.5B AUM 29.95% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
ECM
Engine Capital Management New York $828M AUM 6.49% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Callan Family Office's AVTR Position: Q1 2026 in Review

Callan Family Office increased its Avantor (AVTR) stake by 148% in Q1 2026, buying an estimated $1.22M and bringing the position to 208,228 shares worth $1.63M. The position accounts for 0.04% of the portfolio, ranked #411.

Callan Family Office first reported a position in AVTR in Q4 2024 and has held it in 6 quarters since. The position peaked at $2.98M in Q2 2025. 429 funds tracked by Wall St. Rank hold AVTR as of Q1 2026.

  • Callan Family Office held 208,228 shares of Avantor worth $1.63M as of Q1 2026.
  • Callan Family Office bought 124,153 Avantor shares in Q1 2026, an estimated $1.22M.
  • Avantor made up 0.04% of Callan Family Office's portfolio in Q1 2026, its #411 holding.
  • Callan Family Office first reported a position in Avantor in Q4 2024 and has held it in 6 quarters since.
  • Callan Family Office's Avantor position peaked at $2.98M in Q2 2025.
  • 429 funds tracked by Wall St. Rank held Avantor as of Q1 2026.

Based on Callan Family Office's 13F filing for Q1 2026, filed 13 May 2026.