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Walthausen & Co., LLC
> OSIS
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 09/30/2022 | OSI SYSTEMS INC | OSIS | 24,649 | 0 | 2,106,000 | 0 | $85.44 |
| 06/30/2022 | OSI SYSTEMS INC | OSIS | 24,649 | -3,430 | 2,106,000 | -284,000 | $85.44 |
| 03/31/2022 | OSI SYSTEMS INC | OSIS | 28,079 | 1,440 | 2,390,000 | -93,000 | $85.12 |
| 12/31/2021 | OSI SYSTEMS INC | OSIS | 26,639 | -5,070 | 2,483,000 | -523,000 | $93.21 |
| 09/30/2021 | OSI SYSTEMS INC | OSIS | 31,709 | 2,539 | 3,006,000 | 41,000 | $94.80 |
| 06/30/2021 | OSI SYSTEMS INC | OSIS | 26,310 | 0 | 2,528,000 | 0 | $96.09 |
| 03/31/2021 | OSI SYSTEMS INC | OSIS | 26,310 | 6,790 | 2,528,000 | 708,000 | $96.09 |
| 12/31/2020 | OSI SYSTEMS INC | OSIS | 19,520 | -2,950 | 1,820,000 | 76,000 | $93.24 |
| 09/30/2020 | OSI SYSTEMS INC | OSIS | 22,470 | 22,470 | 1,744,000 | 1,744,000 | $77.61 |
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