AVANTOR INC

Ticker: AVTR CUSIP: 05352A100 Class: EQTY

STATE OF WISCONSIN INVESTMENT BOARD's Holding History (CIK: 0000854157)

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

Q4 2025

Shares 461,936 Value ($000) $5,294 Avg Close $12.31 Range $10.62 - $15.93

Q3 2025

Shares 458,112 Value ($000) $5,717 Avg Close $12.88 Range $10.82 - $14.42

Q2 2025

Shares 369,438 Value ($000) $4,973 Avg Close $13.68 Range $11.82 - $16.29

Q1 2025

Shares 385,515 Value ($000) $6,249 Avg Close $18.94 Range $15.37 - $23.32

Q4 2024

Shares 375,456 Value ($000) $7,911 Avg Close $22.49 Range $19.59 - $26.14

Q3 2024

Shares 383,521 Value ($000) $9,922 Avg Close $24.55 Range $20.49 - $28.00

Q2 2024

Shares 359,948 Value ($000) $7,631 Avg Close $24.08 Range $20.98 - $26.11

Q1 2024

Shares 594,260 Value ($000) $15,195 Avg Close $23.79 Range $21.25 - $26.16

Q4 2023

Shares 348,844 Value ($000) $7,964 Avg Close $20.49 Range $16.63 - $23.36

Q3 2023

Shares 359,214 Value ($000) $7,572 Avg Close $21.27 Range $19.94 - $23.68

Q2 2023

Shares 363,637 Value ($000) $7,469 Avg Close $20.22 Range $18.25 - $21.97

Q1 2023

Shares 362,895 Value ($000) $7,672 Avg Close $22.79 Range $19.69 - $25.25

Q4 2022

Shares 331,553 Value ($000) $6,992 Avg Close $20.70 Range $17.91 - $23.00

Q3 2022

Shares 345,881 Value ($000) $6,779 Avg Close $26.79 Range $19.59 - $32.77

Q2 2022

Shares 412,147 Value ($000) $12,818 Avg Close $31.21 Range $28.64 - $34.37

Q1 2022

Shares 409,295 Value ($000) $13,842 Avg Close $35.67 Range $31.80 - $41.98

Q4 2021

Shares 454,432 Value ($000) $19,150 Avg Close $39.41 Range $36.50 - $42.48

Q3 2021

Shares 417,375 Value ($000) $17,071 Avg Close $39.07 Range $34.85 - $44.37

Q2 2021

Shares 402,647 Value ($000) $14,298 Avg Close $32.34 Range $29.01 - $36.31

Q1 2021

Shares 399,631 Value ($000) $11,561 Avg Close $28.87 Range $26.14 - $31.05

Q4 2020

Shares 267,725 Value ($000) $7,536 Avg Close $25.77 Range $21.75 - $28.98

Q3 2020

Shares 240,965 Value ($000) $5,419 Avg Close $20.79 Range $16.91 - $23.38

Q2 2020

Shares 223,765 Value ($000) $3,804 Avg Close $16.28 Range $11.51 - $19.50

Q1 2020

Shares 42,735 Value ($000) $534 Avg Close $16.03 Range $6.66 - $19.39

Q4 2019

Shares 44,795 Value ($000) $813 Avg Close $15.92 Range $13.33 - $18.84

Q3 2019

Shares 33,115 Value ($000) $487 Avg Close $16.94 Range $13.44 - $19.59

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	461,936	$5,294	$12.31	$10.62 - $15.93
Q3 2025	458,112	$5,717	$12.88	$10.82 - $14.42
Q2 2025	369,438	$4,973	$13.68	$11.82 - $16.29
Q1 2025	385,515	$6,249	$18.94	$15.37 - $23.32
Q4 2024	375,456	$7,911	$22.49	$19.59 - $26.14
Q3 2024	383,521	$9,922	$24.55	$20.49 - $28.00
Q2 2024	359,948	$7,631	$24.08	$20.98 - $26.11
Q1 2024	594,260	$15,195	$23.79	$21.25 - $26.16
Q4 2023	348,844	$7,964	$20.49	$16.63 - $23.36
Q3 2023	359,214	$7,572	$21.27	$19.94 - $23.68
Q2 2023	363,637	$7,469	$20.22	$18.25 - $21.97
Q1 2023	362,895	$7,672	$22.79	$19.69 - $25.25
Q4 2022	331,553	$6,992	$20.70	$17.91 - $23.00
Q3 2022	345,881	$6,779	$26.79	$19.59 - $32.77
Q2 2022	412,147	$12,818	$31.21	$28.64 - $34.37
Q1 2022	409,295	$13,842	$35.67	$31.80 - $41.98
Q4 2021	454,432	$19,150	$39.41	$36.50 - $42.48
Q3 2021	417,375	$17,071	$39.07	$34.85 - $44.37
Q2 2021	402,647	$14,298	$32.34	$29.01 - $36.31
Q1 2021	399,631	$11,561	$28.87	$26.14 - $31.05
Q4 2020	267,725	$7,536	$25.77	$21.75 - $28.98
Q3 2020	240,965	$5,419	$20.79	$16.91 - $23.38
Q2 2020	223,765	$3,804	$16.28	$11.51 - $19.50
Q1 2020	42,735	$534	$16.03	$6.66 - $19.39
Q4 2019	44,795	$813	$15.92	$13.33 - $18.84
Q3 2019	33,115	$487	$16.94	$13.44 - $19.59