Charles River Laboratories International, Inc.
MX ˙ BMV ˙ US1598641074
SecurityMX:CRL / Charles River Laboratories International, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership1,873,618 shares
Latest Disclosed Value $ 323,199,105
State Street Corp reports 0.10% increase in ownership of CRL / Charles River Laboratories International, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 1,873,618 shares of Charles River Laboratories International, Inc. (MX:CRL) valued at $323,199,105 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,871,688 shares of Charles River Laboratories International, Inc.. This represents a change in shares of 0.10% 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)
2026-05-15 2026-03-31 13F CHARLES RIV LABS INTL COM 159864107 1,873,618 1,930 0.10 323,199 -13.44 0.0112
2026-02-13 2025-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,871,688 40,535 2.21 373,364 30.32 0.0125
2025-11-14 2025-09-30 13F CHARLES RIV LABS INTL COM 159864107 1,831,153 -27,634 -1.49 286,502 1.58 0.0099
2025-08-14 2025-06-30 13F CHARLES RIV LABS INTL COM 159864107 1,858,787 -43,838 -2.30 282,034 -1.52 0.0106
2025-05-15 2025-03-31 13F CHARLES RIV LABS INTL COM 159864107 1,902,625 -278,805 -12.78 286,383 -28.88 0.0118
2025-02-14 2024-12-31 13F CHARLES RIV LABS INTL COM 159864107 2,181,430 51,151 2.40 402,663 -4.04 0.0159
2024-11-14 2024-09-30 13F CHARLES RIV LABS INTL COM 159864107 2,130,279 41,421 1.98 419,601 -2.76 0.0171
2024-08-14 2024-06-30 13F CHARLES RIV LABS INTL COM 159864107 2,088,858 -5,254 -0.25 431,516 -23.95 0.0189
2024-05-15 2024-03-31 13F CHARLES RIV LABS INTL COM 159864107 2,094,112 34,327 1.67 567,400 16.53 0.0254
2024-02-14 2023-12-31 13F CHARLES RIV LABS INTL COM 159864107 2,059,785 33,985 1.68 486,933 22.65 0.0237
2023-11-14 2023-09-30 13F CHARLES RIV LABS INTL COM 159864107 2,025,800 -65,217 -3.12 397,016 -9.69 0.0220
2023-08-14 2023-06-30 13F CHARLES RIV LABS INTL COM 159864107 2,091,017 37,816 1.84 439,636 6.10 0.0231
2023-05-15 2023-03-31 13F CHARLES RIV LABS INTL COM 159864107 2,053,201 -13,088 -0.63 414,375 -7.97 0.0234
2023-05-15 2022-12-31 13F/A-99 CHARLES RIV LABS INTL COM 159864107 2,066,289 35,148 1.73 450,244 12.64 0.0265
2023-05-15 2022-12-31 13F CHARLES RIV LABS INTL COM 159864107 2,066,289 35,148 450,244 0.0265
2022-11-15 2022-09-30 13F CHARLES RIV LABS INTL COM 159864107 2,031,141 19,084 0.95 399,729 -7.15 0.0253
2022-08-15 2022-06-30 13F CHARLES RIV LABS INTL COM 159864107 2,012,057 -11,420 -0.56 430,520 -25.08 0.0258
2022-05-16 2022-03-31 13F CHARLES RIV LABS INTL COM 159864107 2,023,477 -7,318 -0.36 574,607 -24.90 0.0284
2022-02-14 2021-12-31 13F CHARLES RIV LABS INTL COM 159864107 2,030,795 73,315 3.75 765,163 -5.28 0.0363
2021-11-15 2021-09-30 13F CHARLES RIV LABS INTL COM 159864107 1,957,480 58,726 3.09 807,793 15.01 0.0427
2021-08-16 2021-06-30 13F CHARLES RIV LABS INTL COM 159864107 1,898,754 748,211 65.03 702,387 110.63 0.0370
2021-07-09 2021-03-31 13F/A-1 CHARLES RIV LABS INTL COM 159864107 1,150,543 -9,170 -0.79 333,462 15.08 0.0191
2021-05-17 2021-03-31 13F CHARLES RIV LABS INTL COM 159864107 1,150,543 -9,170 333,462 0.0191
2021-02-16 2020-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,159,713 24,537 2.16 289,766 12.72 0.0177
2020-11-10 2020-09-30 13F CHARLES RIV LABS INTL COM 159864107 1,135,176 -61,480 -5.14 257,061 23.21 0.0175
2020-08-14 2020-06-30 13F CHARLES RIV LABS INTL COM 159864107 1,196,656 44,689 3.88 208,637 43.50 0.0152
2020-06-19 2020-03-31 13F/A-1 CHARLES RIV LABS INTL COM 159864107 1,151,967 34,731 3.11 145,390 -14.81 0.0127
2020-05-11 2020-03-31 13F CHARLES RIV LABS INTL COM 159864107 1,151,967 34,731 145,390 12,768.1695
2020-02-06 2019-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,117,236 -30,194 -2.63 170,669 12.37 0.0117
2019-11-14 2019-09-30 13F CHARLES RIV LABS INTL COM 159864107 1,147,430 -40,236 -3.39 151,885 -9.88 0.0113
2019-08-14 2019-06-30 13F CHARLES RIV LABS INTL COM 159864107 1,187,666 19,491 1.67 168,530 -0.68 0.0126
2019-05-15 2019-03-31 13F CHARLES RIV LABS INTL COM 159864107 1,168,175 27,580 2.42 169,677 31.44 0.0132
2019-02-12 2018-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,140,595 -68,611 -5.67 129,093 -20.65 0.0118
2018-11-09 2018-09-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,209,206 5,874 0.49 162,685 20.43 0.0125
2018-08-14 2018-06-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,203,332 -47,333 -3.78 135,087 1.19 0.0113
2018-05-15 2018-03-31 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,250,665 -45,060 -3.48 133,495 -5.87 0.0113
2018-02-14 2017-12-31 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,295,725 42,341 3.38 141,818 4.75 0.0114
2017-11-14 2017-09-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,253,384 -14,924 -1.18 135,387 5.53 0.0117
2017-08-14 2017-06-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,268,308 28,365 2.29 128,288 15.02 0.0113
2017-05-15 2017-03-31 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,239,943 13,759 1.12 111,539 19.39 0.0100
2017-02-09 2016-12-31 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,226,184 -37,039 -2.93 93,424 -11.26 0.0088
2017-01-13 2016-09-30 13F/A-1 CHARLES RIVER LABS INTL Common equity shares 159864107 1,263,223 -34,625 -2.67 105,277 -1.60 0.0106
2016-11-14 2016-09-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,263,223 105,277
2016-08-12 2016-06-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,297,848 8,266 0.64 106,990 9.25 0.0115
2016-05-20 2016-03-31 13F/A-1 CHARLES RIVER LABS INTL Common equity shares 159864107 1,289,582 37,420 2.99 97,928 -2.71 0.0106
2016-05-12 2016-03-31 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,289,582 97,928
2016-02-16 2015-12-31 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,252,162 21,625 1.76 100,658 28.78 0.0110
2015-11-16 2015-09-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,230,537 -40,966 -3.22 78,164 -12.60 0.0091
2015-08-13 2015-06-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,271,503 -69,756 -5.20 89,437 -15.90 0.0096
2015-05-15 2015-03-31 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,341,259 38,784 2.98 106,348 28.31 0.0109
2015-02-11 2014-12-31 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,302,475 -15,809 -1.20 82,885 5.24 0.0083
2014-11-12 2014-09-30 13F/A-1 CHARLES RIVER LABS INTL Common equity shares 159864107 1,318,284 73,014 5.86 78,756 18.17 0.0085
2014-11-10 2014-09-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,318,284 78,756
2014-08-12 2014-06-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,245,270 5,654 0.46 66,649 -10.89 0.0072
2014-05-15 2014-03-31 13F/A-1 CHARLES RIVER LABS INTL Common equity shares 159864107 1,239,616 3,389 0.27 74,797 14.07 0.0085
2014-05-13 2014-03-31 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,240,206 74,833
2014-02-06 2013-12-31 13F/A-1 CHARLES RIVER LABS INTL Common equity shares 159864107 1,236,227 -172,286 -12.23 65,573 0.63 0.0073
2014-02-06 2013-12-31 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,319,397 49,434
2013-11-12 2013-09-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,408,513 -145,118 -9.34 65,160 2.22 0.0080
2013-08-08 2013-06-30 13F CHARLES RIVER LABS INTL Common equity shares 159864107 1,553,631 1,553,631 63,742 0.0083
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.