Charles River Laboratories International, Inc.
MX ˙ BMV ˙ US1598641074
SecurityMX:CRL / Charles River Laboratories International, Inc.
InstitutionRiverbridge Partners Llc
Latest Disclosed Ownership63,788 shares
Latest Disclosed Value $ 11,003,458
Riverbridge Partners Llc reports 35.78% decrease in ownership of CRL / Charles River Laboratories International, Inc.

On April 17, 2026 - Riverbridge Partners Llc filed a 13F-HR form disclosing ownership of 63,788 shares of Charles River Laboratories International, Inc. (MX:CRL) valued at $11,003,458 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 13, 2026 disclosing 99,328 shares of Charles River Laboratories International, Inc.. This represents a change in shares of -35.78% during the quarter.

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)
2026-04-17 2026-03-31 13F Charles River Laboratories Int COM 159864107 63,788 -35,540 -35.78 11,003 -44.47 0.2693
2026-01-13 2025-12-31 13F Charles River Laboratories Int COM 159864107 99,328 -25,976 -20.73 19,814 1.06 0.3714
2025-10-14 2025-09-30 13F Charles River Laboratories Int COM 159864107 125,304 -8,323 -6.23 19,605 -3.30 0.3308
2025-07-15 2025-06-30 13F Charles River Laboratories Int COM 159864107 133,627 -89,107 -40.01 20,275 -39.52 0.3262
2025-04-21 2025-03-31 13F Charles River Laboratories Int COM 159864107 222,734 -16,654 -6.96 33,526 -24.14 0.5378
2025-01-17 2024-12-31 13F Charles River Laboratories Int COM 159864107 239,388 -27,059 -10.16 44,191 -15.80 0.6031
2024-10-15 2024-09-30 13F Charles River Laboratories Int COM 159864107 266,447 -22,825 -7.89 52,482 -12.17 0.7010
2024-07-17 2024-06-30 13F Charles River Laboratories Int COM 159864107 289,272 -14,506 -4.78 59,758 -27.40 0.8120
2024-04-26 2024-03-31 13F Charles River Laboratories Int COM 159864107 303,778 3,088 1.03 82,309 15.79 1.0043
2024-02-15 2023-12-31 13F/A-1 Charles River Laboratories Int COM 159864107 300,690 -14,368 -4.56 71,083 15.12 0.8880
2024-01-24 2023-12-31 13F Charles River Laboratories Int COM 159864107 260,595 -14,387 61,605 0.8186
2024-02-15 2023-09-30 13F/A-1 Charles River Laboratories Int COM 159864107 315,058 -6,122 -1.91 61,745 -8.56 0.8426
2023-10-16 2023-09-30 13F Charles River Laboratories Int COM 159864107 274,982 -46,198 53,891 0.7818
2023-07-25 2023-06-30 13F Charles River Laboratories Int COM 159864107 321,180 22,186 7.42 67,528 11.91 0.8513
2023-04-21 2023-03-31 13F Charles River Laboratories Int COM 159864107 298,994 -1,814 -0.60 60,343 92,733.85 0.8459
2023-01-11 2022-12-31 13F Charles River Laboratories Int COM 159864107 300,808 -18,412 -5.77 66 -99.90 0.9841
2022-10-26 2022-09-30 13F Charles River Laboratories Int COM 159864107 319,220 87,669 37.86 62,822 26.80 0.9328
2022-08-29 2022-06-30 13F/A-1 Charles River Laboratories Int COM 159864107 231,551 -27,470 -10.61 49,545 -32.64 0.7930
2022-07-11 2022-06-30 13F Charles River Laboratories Int COM 159864107 272,043 13,022 58,209 0.8328
2022-04-20 2022-03-31 13F Charles River Laboratories Int COM 159864107 259,021 88,183 51.62 73,554 14.27 0.8312
2022-01-14 2021-12-31 13F Charles River Laboratories Int COM 159864107 170,838 5,553 3.36 64,368 -5.63 0.6366
2021-10-26 2021-09-30 13F Charles River Laboratories Int COM 159864107 165,285 -751 -0.45 68,208 11.05 0.6838
2021-07-26 2021-06-30 13F Charles River Laboratories Int COM 159864107 166,036 10,657 6.86 61,420 36.39 0.6237
2021-04-21 2021-03-31 13F Charles River Laboratories Int COM 159864107 155,379 155,379 45,033 0.5129
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.