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CITADEL ADVISORS LLC
> MLAB
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | MESA LABORATORIES INC /CO/ | MLAB | 46,989 | -3,549 | 6,038,087,000 | -2,361,834,000 | $128,500.01 |
| 12/31/2022 | MESA LABORATORIES INC /CO/ | MLAB | 50,538 | 28,257 | 8,399,921,000 | 8,396,783,000 | $166,210.00 |
| 09/30/2022 | MESA LABORATORIES INC /CO/ | MLAB | 22,281 | 17,680 | 3,138,000 | 2,200,000 | $140.84 |
| 06/30/2022 | MESA LABORATORIES INC /CO/ | MLAB | 4,601 | -10,229 | 938,000 | -2,842,000 | $203.87 |
| 03/31/2022 | MESA LABORATORIES INC /CO/ | MLAB | 14,830 | 13,291 | 3,780,000 | 3,275,000 | $254.89 |
| 12/31/2021 | MESA LABORATORIES INC /CO/ | MLAB | 1,539 | -891 | 505,000 | -230,000 | $328.14 |
| 09/30/2021 | MESA LABORATORIES INC /CO/ | MLAB | 2,430 | -3,192 | 735,000 | -790,000 | $302.47 |
| 06/30/2021 | MESA LABORATORIES INC /CO/ | MLAB | 5,622 | -5,508 | 1,525,000 | -1,185,000 | $271.26 |
| 03/31/2021 | MESA LABORATORIES INC /CO/ | MLAB | 11,130 | -961 | 2,710,000 | -756,000 | $243.49 |
| 12/31/2020 | MESA LABORATORIES INC /CO/ | MLAB | 12,091 | 6,877 | 3,466,000 | 2,137,000 | $286.66 |
| 09/30/2020 | MESA LABORATORIES INC /CO/ | MLAB | 5,214 | -7,882 | 1,329,000 | -1,510,000 | $254.89 |
| 06/30/2020 | MESA LABORATORIES INC /CO/ | MLAB | 13,096 | 10,174 | 2,839,000 | 2,179,000 | $216.78 |
| 03/31/2020 | MESA LABORATORIES INC /CO/ | MLAB | 2,922 | -3,434 | 660,000 | -925,000 | $225.87 |
| 12/31/2019 | MESA LABORATORIES INC /CO/ | MLAB | 6,356 | 6,356 | 1,585,000 | 1,585,000 | $249.37 |
| 06/30/2019 | MESA LABORATORIES INC /CO/ | MLAB | 0 | -3,975 | 0 | -916,000 | |
| 03/31/2019 | MESA LABORATORIES INC /CO/ | MLAB | 3,975 | 1,216 | 916,000 | 341,000 | $230.44 |
| 12/31/2018 | MESA LABORATORIES INC /CO/ | MLAB | 2,759 | -551 | 575,000 | -40,000 | $208.41 |
| 09/30/2018 | MESA LABORATORIES INC /CO/ | MLAB | 3,310 | 3,310 | 615,000 | 615,000 | $185.80 |
| 12/31/2016 | MESA LABORATORIES INC /CO/ | MLAB | 0 | -1,796 | 0 | -205,000 | |
| 09/30/2016 | MESA LABORATORIES INC /CO/ | MLAB | 1,796 | 1,796 | 205,000 | 205,000 | $114.14 |
| 06/30/2016 | MESA LABORATORIES INC /CO/ | MLAB | 1,834 | 1,834 | 226,000 | 226,000 | $123.23 |
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