Charles River Laboratories International, Inc.
MX ˙ BMV ˙ US1598641074
SecurityMX:CRL / Charles River Laboratories International, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership445,382 shares
Latest Disclosed Value $ 76,828,397
Northern Trust Corp reports 1.42% increase in ownership of CRL / Charles River Laboratories International, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 445,382 shares of Charles River Laboratories International, Inc. (MX:CRL) valued at $76,828,397 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 439,161 shares of Charles River Laboratories International, Inc.. This represents a change in shares of 1.42% 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)
2026-05-14 2026-03-31 13F CHARLES RIV LABS INTL COM 159864107 445,382 6,221 1.42 76,828 -12.30 0.0021
2026-02-17 2025-12-31 13F CHARLES RIV LABS INTL COM 159864107 439,161 -37,303 -7.83 87,604 17.51 0.0023
2025-11-14 2025-09-30 13F CHARLES RIV LABS INTL COM 159864107 476,464 -721 -0.15 74,548 2.96 0.0022
2025-08-13 2025-06-30 13F CHARLES RIV LABS INTL COM 159864107 477,185 -15,285 -3.10 72,403 -2.32 0.0100
2025-05-13 2025-03-31 13F CHARLES RIV LABS INTL COM 159864107 492,470 252 0.05 74,127 -18.42 0.0110
2025-02-14 2024-12-31 13F CHARLES RIV LABS INTL COM 159864107 492,218 58,398 13.46 90,863 6.34 0.0129
2024-11-13 2024-09-30 13F CHARLES RIV LABS INTL COM 159864107 433,820 -24,077 -5.26 85,450 -9.67 0.0140
2024-08-14 2024-06-30 13F CHARLES RIV LABS INTL COM 159864107 457,897 -1,354 -0.29 94,592 -23.98 0.0159
2024-05-14 2024-03-31 13F CHARLES RIV LABS INTL COM 159864107 459,251 -21,135 -4.40 124,434 9.57 0.0215
2024-02-13 2023-12-31 13F CHARLES RIV LABS INTL COM 159864107 480,386 -17,081 -3.43 113,563 16.48 0.0206
2023-11-13 2023-09-30 13F CHARLES RIV LABS INTL COM 159864107 497,467 24,249 5.12 97,494 -2.01 0.0189
2023-08-11 2023-06-30 13F CHARLES RIV LABS INTL COM 159864107 473,218 -17,809 -3.63 99,494 0.40 0.0191
2023-05-15 2023-03-31 13F CHARLES RIV LABS INTL COM 159864107 491,027 -5,272 -1.06 99,099 -8.36 0.0196
2023-02-13 2022-12-31 13F CHARLES RIV LABS INTL COM 159864107 496,299 1,724 0.35 108,144 11.11 0.0227
2022-11-14 2022-09-30 13F CHARLES RIV LABS INTL COM 159864107 494,575 -5,484 -1.10 97,333 -9.03 0.0222
2022-08-12 2022-06-30 13F CHARLES RIV LABS INTL COM 159864107 500,059 -5,786 -1.14 106,998 -25.51 0.0229
2022-05-13 2022-03-31 13F CHARLES RIV LABS INTL COM 159864107 505,845 -11,644 -2.25 143,645 -26.33 0.0253
2022-02-08 2021-12-31 13F CHARLES RIV LABS INTL COM 159864107 517,489 -9,860 -1.87 194,980 -10.40 0.0319
2021-11-15 2021-09-30 13F CHARLES RIV LABS INTL COM 159864107 527,349 14,387 2.80 217,621 14.68 0.0385
2021-08-13 2021-06-30 13F CHARLES RIV LABS INTL COM 159864107 512,962 75,720 17.32 189,756 49.74 0.0334
2021-05-12 2021-03-31 13F CHARLES RIV LABS INTL COM 159864107 437,242 40,500 10.21 126,725 27.84 0.0236
2021-02-11 2020-12-31 13F CHARLES RIV LABS INTL COM 159864107 396,742 -9,318 -2.29 99,130 7.81 0.0193
2020-11-16 2020-09-30 13F CHARLES RIV LABS INTL COM 159864107 406,060 -18,041 -4.25 91,951 24.36 0.0202
2020-08-14 2020-06-30 13F CHARLES RIV LABS INTL COM 159864107 424,101 12,444 3.02 73,942 42.32 0.0175
2020-05-14 2020-03-31 13F CHARLES RIV LABS INTL COM 159864107 411,657 18,226 4.63 51,955 -13.55 0.0149
2020-02-14 2019-12-31 13F CHARLES RIV LABS INTL COM 159864107 393,431 8,372 2.17 60,100 17.91 0.0135
2019-11-13 2019-09-30 13F CHARLES RIV LABS INTL COM 159864107 385,059 -1,937 -0.50 50,970 -7.18 0.0122
2019-08-13 2019-06-30 13F CHARLES RIV LABS INTL COM 159864107 386,996 3,504 0.91 54,914 -1.41 0.0130
2019-05-13 2019-03-31 13F CHARLES RIV LABS INTL COM 159864107 383,492 10,570 2.83 55,701 31.97 0.0138
2019-02-12 2018-12-31 13F CHARLES RIV LABS INTL COM 159864107 372,922 3,193 0.86 42,208 -15.15 0.0118
2018-11-14 2018-09-30 13F CHARLES RIV LABS INTL COM 159864107 369,729 -10,669 -2.80 49,744 16.49 0.0122
2018-09-18 2018-06-30 13F/A-1 CHARLES RIV LABS INTL COM 159864107 380,398 -31,649 -7.68 42,703 -2.91 0.0108
2018-08-14 2018-06-30 13F CHARLES RIV LABS INTL COM 159864107 383,314 -28,733 43,031
2018-05-09 2018-03-31 13F CHARLES RIV LABS INTL COM 159864107 412,047 -11,600 -2.74 43,981 -5.15 0.0114
2018-02-14 2017-12-31 13F CHARLES RIV LABS INTL COM 159864107 423,647 -2,652 -0.62 46,369 0.69 0.0117
2017-11-13 2017-09-30 13F CHARLES RIV LABS INTL COM 159864107 426,299 -10,561 -2.42 46,050 4.21 0.0120
2017-08-11 2017-06-30 13F CHARLES RIV LABS INTL COM 159864107 436,860 6,304 1.46 44,188 14.10 0.0124
2017-05-12 2017-03-31 13F CHARLES RIV LABS INTL COM 159864107 430,556 10,133 2.41 38,729 20.90 0.0112
2017-02-13 2016-12-31 13F CHARLES RIV LABS INTL COM 159864107 420,423 251 0.06 32,033 -8.52 0.0098
2016-11-09 2016-09-30 13F CHARLES RIV LABS INTL COM 159864107 420,172 9,496 2.31 35,017 3.43 0.0109
2016-08-12 2016-06-30 13F CHARLES RIV LABS INTL COM 159864107 410,676 3,597 0.88 33,856 10.31 0.0110
2016-08-19 2016-03-31 13F/A-1 CHARLES RIV LABS INTL COM 159864107 407,079 13,574 3.45 30,691 -2.98 0.0102
2016-05-13 2016-03-31 13F Charles Riv Labs Int COMM 159864107 407,077 30,913
2016-02-12 2015-12-31 13F Charles Riv Labs Int COMM 159864107 393,505 -3,922 -0.99 31,634 25.31 0.0105
2015-11-12 2015-09-30 13F CHARLES RIV LABS INTL COM 159864107 397,427 17,264 4.54 25,244 -5.59 0.0084
2015-08-13 2015-06-30 13F CHARLES RIV LABS INTL COM 159864107 380,163 -19,077 -4.78 26,740 -15.53 0.0181
2015-08-13 2015-06-30 13F Charles Riv Labs Int COMM 015986410 10,925 -388,315 768 0.0005
2015-05-14 2015-03-31 13F Charles Riv Labs Int COMM 159864107 399,240 -4,288 -1.06 31,656 23.27 0.0095
2015-02-12 2014-12-31 13F Charles Riv Labs Int COM 159864107 403,528 20,846 5.45 25,680 12.33 0.0078
2014-11-13 2014-09-30 13F Charles Riv Labs Int COMM 159864107 382,682 -22,336 -5.51 22,862 5.47 0.0072
2014-08-14 2014-06-30 13F CHARLES RIV LABS INTL com 159864107 405,018 9,550 2.41 21,677 -9.16 0.0068
2014-05-14 2014-03-31 13F CHARLES RIV LABS INTL COMM 159864107 395,468 1,939 0.49 23,863 14.32 0.0075
2014-02-21 2013-12-31 13F/A-1 CHARLES RIV LABS INTL COM 159864107 393,529 -3,656 -0.92 20,873 13.60 0.0067
2014-02-12 2013-12-31 13F CHARLES RIV LABS INTL COM 159864107 393,529 20,873
2013-11-13 2013-09-30 13F CHARLES RIV LABS INTL COM 159864107 397,185 -11,860 -2.90 18,374 9.48 0.0065
2013-08-09 2013-06-30 13F CHARLES RIV LABS INTL COM 159864107 409,045 409,045 16,783 0.0061
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.