Charles River Laboratories International, Inc.
US ˙ NYSE ˙ US1598641074

SecurityCRL / Charles River Laboratories International, Inc.
InstitutionStrs Ohio
Latest Disclosed Ownership1,167 shares
Latest Disclosed Value $ 201,308
Strs Ohio reports 0.09% decrease in ownership of CRL / Charles River Laboratories International, Inc.

On April 24, 2026 - Strs Ohio filed a 13F-HR form disclosing ownership of 1,167 shares of Charles River Laboratories International, Inc. (US:CRL) valued at $201,308 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 1,168 shares of Charles River Laboratories International, Inc.. This represents a change in shares of -0.09% during the quarter. The current value of the position is $216,817 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-24 2026-03-31 13F CHARLES RIVER LABORATORIES COM_STK 159864107 1,167 -1 -0.09 201 -13.36 0.0008
2026-02-02 2025-12-31 13F CHARLES RIVER LABORATORIES COM_STK 159864107 1,168 2 0.17 233 27.47 0.0009
2025-10-30 2025-09-30 13F CHARLES RIVER LABORATORIES COM_STK 159864107 1,166 0 0.00 182 3.41 0.0007
2025-08-04 2025-06-30 13F CHARLES RIVER LABORATORIES COM_STK 159864107 1,166 1,166 177 0.0007
2025-05-28 2025-03-31 13F CHARLES RIVER LABORATORIES COM_STK 159864107 0 -3,660 -100.00 0 -100.00
2025-05-28 2024-12-31 13F CHARLES RIVER LABORATORIES COM_STK 159864107 3,660 -13,392 -78.54 676 -79.90 0.0027
2024-11-01 2024-09-30 13F CHARLES RIVER LABORATORIES COM_STK 159864107 17,052 -23,504 -57.95 3,359 -59.92 0.0129
2024-08-05 2024-06-30 13F CHARLES RIVER LABORATORIES COM_STK 159864107 40,556 -5,156 -11.28 8,378 69,716.67 0.0331
2024-05-13 2024-03-31 13F CHARLES RIVER LABORATORIES COM_STK 159864107 45,712 10,752 30.76 12 50.00 0.0493
2024-01-30 2023-12-31 13F CHARLES RIVER LABORATORIES COM 159864107 34,960 1,363 4.06 8 33.33 0.0344
2023-10-26 2023-09-30 13F/A-1 CHARLES RIVER LABORATORIES COM 159864107 33,597 -89,586 -72.73 7 -76.00 0.0293
2023-10-26 2023-09-30 13F CHARLES RIVER LABORATORIES COM 159864107 33,597 -89,586 7 0.0293
2023-07-31 2023-06-30 13F CHARLES RIVER LABORATORIES COM 159864107 123,183 -82,007 -39.97 26 -39.02 0.1093
2023-08-02 2023-03-31 13F/A-2 CHARLES RIVER LABORATORIES COM 159864107 205,190 6,190 3.11 41 -4.65 0.1794
2023-08-02 2023-03-31 13F/A-1 CHARLES RIVER LABORATORIES COM 159864107 205,190 41
2023-04-27 2023-03-31 13F CHARLES RIVER LABORATORIES COM 159864107 205,190 6,190 41 0.2137
2023-01-26 2022-12-31 13F CHARLES RIVER LABORATORIES COM 159864107 199,000 25,000 14.37 43 -99.87 0.1958
2022-10-27 2022-09-30 13F CHARLES RIVER LABORATORIES COM 159864107 174,000 0 0.00 34,243 -8.02 0.1632
2022-07-25 2022-06-30 13F CHARLES RIVER LABORATORIES COM 159864107 174,000 22,006 14.48 37,230 -13.74 0.1677
2022-04-21 2022-03-31 13F CHARLES RIVER LABORATORIES COM 159864107 151,994 15,702 11.52 43,161 -15.95 0.1579
2022-01-24 2021-12-31 13F CHARLES RIVER LABORATORIES COM 159864107 136,292 130,820 2,390.72 51,352 2,174.22 0.1782
2021-10-22 2021-09-30 13F CHARLES RIVER LABORATORIES COM 159864107 5,472 -365 -6.25 2,258 4.59 0.0085
2021-07-26 2021-06-30 13F CHARLES RIVER LABORATORIES COM 159864107 5,837 -2,074 -26.22 2,159 -5.80 0.0078
2021-04-23 2021-03-31 13F CHARLES RIVER LABORATORIES COM 159864107 7,911 -33 -0.42 2,292 15.52 0.0086
2021-01-25 2020-12-31 13F CHARLES RIVER LABORATORIES COM 159864107 7,944 522 7.03 1,984 18.10 0.0077
2020-12-14 2020-09-30 13F CHARLES RIVER LABORATORIES COM 159864107 7,422 -1,093 -12.84 1,680 13.21 0.0070
2020-07-23 2020-06-30 13F CHARLES RIVER LABORATORIES COM 159864107 8,515 2,487 41.26 1,484 95.26 0.0065
2020-04-23 2020-03-31 13F CHARLES RIVER LABORATORIES COM 159864107 6,028 840 16.19 760 -4.04 0.0040
2020-01-24 2019-12-31 13F CHARLES RIVER LABORATORIES COM 159864107 5,188 2,511 93.80 792 123.73 0.0033
2019-10-21 2019-09-30 13F/A-1 CHARLES RIVER LABORATORIES COM 159864107 2,677 -239 -8.20 354 -14.29 0.0016
2019-10-21 2019-09-30 13F CHARLES RIVER LABORATORIES COM 159864107 2,677 -2,511 354 1,566.8236
2019-07-25 2019-06-30 13F CHARLES RIVER LABORATORIES COM 159864107 2,916 -426 -12.75 413 -14.85 0.0018
2019-04-19 2019-03-31 13F CHARLES RIVER LABORATORIES COM 159864107 3,342 -571 -14.59 485 9.73 0.0022
2019-01-23 2018-12-31 13F CHARLES RIVER LABORATORIES COM 159864107 3,913 951 32.11 442 11.06 0.0022
2018-10-19 2018-09-30 13F CHARLES RIVER LABORATORIES COM 159864107 2,962 -685 -18.78 398 -2.69 0.0017
2018-08-06 2018-06-30 13F CHARLES RIVER LABORATORIES COM 159864107 3,647 3,647 409 0.0018
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.