AVANTOR INC

Ticker: AVTR CUSIP: 05352A100 Class: EQTY

TANDEM CAPITAL MANAGEMENT CORP /ADV's Holding History (CIK: 0000873759)

Note: Option positions (PUT/CALL) are excluded.

Q3 2025

Shares 20,720 Value ($000) $259 Avg Close $12.88 Range $10.82 - $14.42

Q2 2025

Shares 24,092 Value ($000) $324 Avg Close $13.68 Range $11.82 - $16.29

Q1 2025

Shares 28,594 Value ($000) $464 Avg Close $18.94 Range $15.37 - $23.32

Q4 2024

Shares 36,662 Value ($000) $772 Avg Close $22.49 Range $19.59 - $26.14

Q3 2024

Shares 41,142 Value ($000) $1,064 Avg Close $24.55 Range $20.49 - $28.00

Q2 2024

Shares 46,452 Value ($000) $977 Avg Close $24.08 Range $20.98 - $26.11

Q1 2024

Shares 49,582 Value ($000) $1,268 Avg Close $23.79 Range $21.25 - $26.16

Q4 2023

Shares 49,332 Value ($000) $1,126 Avg Close $20.49 Range $16.63 - $23.36

Q3 2023

Shares 53,532 Value ($000) $1,128 Avg Close $21.27 Range $19.94 - $23.68

Q2 2023

Shares 53,332 Value ($000) $1,095 Avg Close $20.22 Range $18.25 - $21.97

Q1 2023

Shares 53,080 Value ($000) $1,122 Avg Close $22.79 Range $19.69 - $25.25

Q4 2022

Shares 53,570 Value ($000) $1,130 Avg Close $20.70 Range $17.91 - $23.00

Q3 2022

Shares 50,230 Value ($000) $986 Avg Close $26.79 Range $19.59 - $32.77

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	20,720	$259	$12.88	$10.82 - $14.42
Q2 2025	24,092	$324	$13.68	$11.82 - $16.29
Q1 2025	28,594	$464	$18.94	$15.37 - $23.32
Q4 2024	36,662	$772	$22.49	$19.59 - $26.14
Q3 2024	41,142	$1,064	$24.55	$20.49 - $28.00
Q2 2024	46,452	$977	$24.08	$20.98 - $26.11
Q1 2024	49,582	$1,268	$23.79	$21.25 - $26.16
Q4 2023	49,332	$1,126	$20.49	$16.63 - $23.36
Q3 2023	53,532	$1,128	$21.27	$19.94 - $23.68
Q2 2023	53,332	$1,095	$20.22	$18.25 - $21.97
Q1 2023	53,080	$1,122	$22.79	$19.69 - $25.25
Q4 2022	53,570	$1,130	$20.70	$17.91 - $23.00
Q3 2022	50,230	$986	$26.79	$19.59 - $32.77