Robert Olstein’s Avantor AVTR Stock Holding History

Robert Olstein’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	-1,210,000	Closed	-$9.49M	–	7
2026 Q1	$9.49M	Buy	1,210,000 +392,000	+48%	+$3.86M	2.07%	3
2025 Q4	$9.37M	Buy	818,000 +24,000	+3%	+$295K	1.92%	5
2025 Q3	$9.91M	Buy	794,000 +115,000	+17%	+$1.48M	1.87%	4
2025 Q2	$9.14M	Buy	679,000 +111,000	+20%	+$1.52M	1.71%	6
2025 Q1	$9.21M	Buy	568,000 +212,000	+60%	+$4.02M	1.69%	11
2024 Q4	$7.5M	Buy	356,000 +121,000	+51%	+$2.72M	1.32%	34
2024 Q3	$6.08M	Sell	235,000 -56,184	-19%	-$1.38M	1.03%	53
2024 Q2	$6.17M	Sell	291,184 -3,000	-1%	-$72.2K	1.1%	50
2024 Q1	$7.52M	Sell	294,184 -20,816	-7%	-$495K	1.23%	40
2023 Q4	$7.19M	Buy	315,000 +9,000	+3%	+$184K	1.21%	40
2023 Q3	$6.45M	Hold	306,000	–	–	1.11%	50
2023 Q2	$6.29M	Buy	306,000 +165,000	+117%	+$3.34M	1.02%	51
2023 Q1	$2.98M	Buy	+141,000	New	+$3.21M	0.47%	85

Other funds holding AVTR

Dodge & Cox San Francisco, California $191B AUM 17.5% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Greenhaven Associates Purchase, New York $8.66B AUM 17.37% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

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 Dallas, Texas $33B AUM 40.62% 1-Year Est. Return

NMC

New Mountain Capital New York $139M AUM 26.45% 1-Year Est. Return

Robert Olstein's AVTR Position: Q2 2026 in Review

Robert Olstein sold out of Avantor (AVTR) in Q2 2026, closing a stake of 1,210,000 shares — an estimated $9.49M sold.

Robert Olstein first reported a position in AVTR in Q1 2023 and held it in 13 quarters. The position peaked at $9.91M in Q3 2025. 456 funds tracked by Wall St. Rank hold AVTR as of Q2 2026.

Robert Olstein reported no remaining Avantor position as of Q2 2026 after selling out during the quarter.
Robert Olstein sold 1,210,000 Avantor shares in Q2 2026, an estimated $9.49M.
Robert Olstein first reported a position in Avantor in Q1 2023 and held it in 13 quarters.
Robert Olstein's Avantor position peaked at $9.91M in Q3 2025.
456 funds tracked by Wall St. Rank held Avantor as of Q2 2026.

Based on Olstein Capital Management's 13F filing for Q2 2026.