Charles River Laboratories International, Inc.
MX ˙ BMV ˙ US1598641074
SecurityMX:CRL / Charles River Laboratories International, Inc.
InstitutionFmr Llc
Latest Disclosed Ownership3,456,244 shares
Ownership 7.00%
Fmr Llc ownership in CRL / Charles River Laboratories International, Inc.

2026-05-06 - Fmr Llc has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 3,456,244 shares of Charles River Laboratories International, Inc. (MX:CRL). This represents 7.0 percent ownership of the company. In their previous filing dated 2023-01-31 , Fmr Llc had reported owning 557,203 shares, indicating an increase of 520.28 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-05-06 2026-05-06 13G 557,203 3,456,244 520.28 7.00 539.27
2023-01-31 2023-01-31 13G/A 2,770,128 557,203 -79.89 1.09 -80.05
2022-02-09 2022-02-09 13G 1,806,709 2,770,128 53.32 5.49 46.14
2019-02-13 2019-02-13 13G/A 3,000,499 1,806,709 -39.79 3.76 -40.71
2018-02-13 2018-02-13 13G 3,000,499 6.33

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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 3,456,244 1,722,334 99.33 596,202 72.37 0.0062
2026-02-17 2025-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,733,910 1,320,377 319.29 345,880 434.58 0.0176
2025-11-13 2025-09-30 13F CHARLES RIV LABS INTL COM 159864107 413,533 335,214 428.01 64,701 444.48 0.0034
2025-08-14 2025-06-30 13F CHARLES RIV LABS INTL COM 159864107 78,319 -23,417 -23.02 11,883 -22.40 0.0007
2025-05-12 2025-03-31 13F CHARLES RIV LABS INTL COM 159864107 101,736 -40,433 -28.44 15,313 -41.65 0.0010
2025-02-13 2024-12-31 13F CHARLES RIV LABS INTL COM 159864107 142,169 7,877 5.87 26,244 -0.78 0.0016
2024-11-13 2024-09-30 13F CHARLES RIV LABS INTL COM 159864107 134,292 -323,427 -70.66 26,452 -72.03 0.0016
2024-08-13 2024-06-30 13F CHARLES RIV LABS INTL COM 159864107 457,719 -7,046 -1.52 94,556 -24.91 0.0061
2024-05-13 2024-03-31 13F CHARLES RIV LABS INTL COM 159864107 464,765 85,480 22.54 125,928 40.45 0.0085
2024-02-13 2023-12-31 13F CHARLES RIV LABS INTL COM 159864107 379,285 -526,070 -58.11 89,663 -49.47 0.0069
2023-11-13 2023-09-30 13F CHARLES RIV LABS INTL COM 159864107 905,355 13,030 1.46 177,431 -5.43 0.0153
2023-08-11 2023-06-30 13F CHARLES RIV LABS INTL COM 159864107 892,325 153,316 20.75 187,611 25.79 0.0157
2023-08-11 2023-03-31 13F/A-1 CHARLES RIV LABS INTL COM 159864107 739,009 181,803 32.63 149,147 22.84 0.0136
2023-05-11 2023-03-31 13F CHARLES RIV LABS INTL COM 159864107 739,009 181,803 149,147 0.0136
2023-02-13 2022-12-31 13F CHARLES RIV LABS INTL COM 159864107 557,206 -182,578 -24.68 121,415 -16.60 0.0121
2022-11-10 2022-09-30 13F CHARLES RIV LABS INTL COM 159864107 739,784 -784,247 -51.46 145,589 -55.35 0.0152
2022-08-12 2022-06-30 13F CHARLES RIV LABS INTL COM 159864107 1,524,031 -864,787 -36.20 326,097 -51.93 0.0325
2022-05-13 2022-03-31 13F CHARLES RIV LABS INTL COM 159864107 2,388,818 -381,311 -13.77 678,352 -35.01 0.0542
2022-02-14 2021-12-31 13F CHARLES RIV LABS INTL COM 159864107 2,770,129 -53,784 -1.90 1,043,729 -10.44 0.0771
2022-02-14 2021-09-30 13F/A-1 CHARLES RIV LABS INTL COM 159864107 2,823,913 265,507 10.38 1,165,345 23.13 0.0924
2021-11-15 2021-09-30 13F CHARLES RIV LABS INTL COM 159864107 2,823,913 265,507 1,165,345 0.0924
2021-08-13 2021-06-30 13F CHARLES RIV LABS INTL COM 159864107 2,558,406 527,728 25.99 946,406 60.80 0.0741
2021-05-14 2021-03-31 13F CHARLES RIV LABS INTL COM 159864107 2,030,678 224,525 12.43 588,551 30.42 0.0503
2021-02-08 2020-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,806,153 23,565 1.32 451,285 11.80 0.0402
2020-11-13 2020-09-30 13F CHARLES RIV LABS INTL COM 159864107 1,782,588 -163,102 -8.38 403,667 18.99 0.0408
2020-08-24 2020-06-30 13F/A-1 CHARLES RIV LABS INTL COM 159864107 1,945,690 299,655 18.20 339,231 63.29 0.0373
2020-08-13 2020-06-30 13F CHARLES RIV LABS INTL COM 159864107 1,945,690 299,655 339,231 8,333.9130
2020-05-14 2020-03-31 13F CHARLES RIV LABS INTL COM 159864107 1,646,035 -264,779 -13.86 207,746 -28.83 0.0288
2020-02-07 2019-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,910,814 353,231 22.68 291,896 41.58 0.0322
2019-11-13 2019-09-30 13F CHARLES RIV LABS INTL COM 159864107 1,557,583 -33,640 -2.11 206,177 -8.69 0.0247
2019-08-13 2019-06-30 13F CHARLES RIV LABS INTL COM 159864107 1,591,223 -82,274 -4.92 225,795 -7.11 0.0264
2019-05-13 2019-03-31 13F CHARLES RIV LABS INTL COM 159864107 1,673,497 -133,212 -7.37 243,075 18.87 0.0291
2019-02-13 2018-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,806,709 -62,760 -3.36 204,482 -18.70 0.0280
2018-11-09 2018-09-30 13F CHARLES RIV LABS INTL COM 159864107 1,869,469 638,644 51.89 251,518 82.03 0.0283
2018-08-10 2018-06-30 13F CHARLES RIV LABS INTL COM 159864107 1,230,825 -1,771,790 -59.01 138,172 -56.89 0.0163
2018-05-14 2018-03-31 13F CHARLES RIV LABS INTL COM 159864107 3,002,615 2,709 0.09 320,500 -2.39 0.0380
2018-02-12 2017-12-31 13F CHARLES RIV LABS INTL COM 159864107 2,999,906 43,545 1.47 328,340 2.82 0.0385
2017-11-13 2017-09-30 13F CHARLES RIV LABS INTL COM 159864107 2,956,361 -122,818 -3.99 319,347 2.53 0.0386
2017-08-29 2017-06-30 13F/A-1 CHARLES RIV LABS INTL COM 159864107 3,079,179 591,066 23.76 311,458 39.16 0.0387
2017-08-11 2017-06-30 13F CHARLES RIV LABS INTL COM 159864107 3,079,179 591,066 311,458
2017-05-11 2017-03-31 13F CHARLES RIV LABS INTL COM 159864107 2,488,113 707,612 39.74 223,806 64.98 0.0284
2017-02-10 2016-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,780,501 -506,126 -22.13 135,657 -28.81 0.0181
2016-11-14 2016-09-30 13F CHARLES RIV LABS INTL COM 159864107 2,286,627 128,150 5.94 190,567 7.09 0.0254
2016-08-11 2016-06-30 13F CHARLES RIV LABS INTL COM 159864107 2,158,477 351,630 19.46 177,945 29.69 0.0243
2016-05-16 2016-03-31 13F CHARLES RIV LABS INTL COM 159864107 1,806,847 -55,329 -2.97 137,212 -8.34 0.0190
2016-02-12 2015-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,862,176 -736,151 -28.33 149,700 -9.30 0.0201
2015-11-10 2015-09-30 13F CHARLES RIV LABS INTL COM 159864107 2,598,327 196,700 8.19 165,046 -2.30 0.0235
2015-08-25 2015-06-30 13F/A-1 CHARLES RIV LABS INTL COM 159864107 2,401,627 190,422 8.61 168,931 -3.65 0.0217
2015-08-13 2015-06-30 13F CHARLES RIV LABS INTL COM 159864107 2,401,627 168,931
2015-05-14 2015-03-31 13F CHARLES RIV LABS INTL COM 159864107 2,211,205 1,008,145 83.80 175,327 129.00 0.0223
2015-02-17 2014-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,203,060 -97,900 -7.53 76,562 -1.49 0.0100
2014-11-14 2014-09-30 13F CHARLES RIV LABS INTL COM 159864107 1,300,960 -236,300 -15.37 77,720 -5.54 0.0105
2014-08-14 2014-06-30 13F CHARLES RIV LABS INTL COM 159864107 1,537,260 29,840 1.98 82,274 -9.55 0.0110
2014-05-15 2014-03-31 13F CHARLES RIV LABS INTL COM 159864107 1,507,420 603,460 66.76 90,958 89.71 0.0126
2014-02-13 2013-12-31 13F CHARLES RIV LABS INTL COM 159864107 903,960 8,840 0.99 47,946 15.79 0.0068
2013-11-14 2013-09-30 13F CHARLES RIV LABS INTL COM 159864107 895,120 -123,410 -12.12 41,408 -0.92 0.0063
2013-09-24 2013-06-30 13F/A-1 CHARLES RIV LABS INTL COM 159864107 1,018,530 1,018,530 41,791 0.0068
2013-08-14 2013-06-30 13F CHARLES RIV LABS INTL COM 159864107 1,018,530 41,791 0.0068
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.