Charles River Laboratories International, Inc.
MX ˙ BMV ˙ US1598641074
SecurityMX:CRL / Charles River Laboratories International, Inc.
InstitutionVestmark Advisory Solutions, Inc.
Latest Disclosed Ownership3,530 shares
Latest Disclosed Value $ 608,925
Vestmark Advisory Solutions, Inc. reports 3.92% decrease in ownership of CRL / Charles River Laboratories International, Inc.

On May 15, 2026 - Vestmark Advisory Solutions, Inc. filed a 13F-HR form disclosing ownership of 3,530 shares of Charles River Laboratories International, Inc. (MX:CRL) valued at $608,925 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 3,674 shares of Charles River Laboratories International, Inc.. This represents a change in shares of -3.92% 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 3,530 -144 -3.92 609 -16.94 0.0042
2026-02-06 2025-12-31 13F CHARLES RIV LABS INTL COM 159864107 3,674 3,674 733 0.0099
2025-08-06 2025-06-30 13F CHARLES RIV LABS INTL COM 159864107 0 -41,820 -100.00 0 -100.00
2025-05-13 2025-03-31 13F CHARLES RIV LABS INTL COM 159864107 41,820 18,252 77.44 6,295 44.69 0.1621
2025-02-06 2024-12-31 13F CHARLES RIV LABS INTL COM 159864107 23,568 -2,196 -8.52 4,351 -14.27 0.1498
2024-11-14 2024-09-30 13F CHARLES RIV LABS INTL COM 159864107 25,764 2,219 9.42 5,075 4.34 0.1889
2024-08-12 2024-06-30 13F CHARLES RIV LABS INTL COM 159864107 23,545 4,086 21.00 4,864 -7.76 0.2031
2024-05-15 2024-03-31 13F CHARLES RIV LABS INTL COM 159864107 19,459 1,339 7.39 5,272 23.09 0.2271
2024-02-06 2023-12-31 13F CHARLES RIV LABS INTL COM 159864107 18,120 1,231 7.29 4,284 29.43 0.2176
2023-11-06 2023-09-30 13F CHARLES RIV LABS INTL COM 159864107 16,889 -21,481 -55.98 3,310 -58.98 0.2406
2023-08-07 2023-06-30 13F CHARLES RIV LABS INTL COM 159864107 38,370 1,434 3.88 8,067 8.22 0.3072
2023-05-09 2023-03-31 13F CHARLES RIV LABS INTL COM 159864107 36,936 1,561 4.41 7,454 -3.30 0.3228
2023-01-20 2022-12-31 13F CHARLES RIV LABS INTL COM 159864107 35,375 -795 -2.20 7,708 8.29 0.3755
2022-11-03 2022-09-30 13F CHARLES RIV LABS INTL COM 159864107 36,170 2,734 8.18 7,118 -0.50 0.3968
2022-08-04 2022-06-30 13F CHARLES RIV LABS INTL COM 159864107 33,436 4,209 14.40 7,154 -13.81 0.4086
2022-04-27 2022-03-31 13F CHARLES RIV LABS INTL COM 159864107 29,227 3,815 15.01 8,300 -13.32 0.4698
2022-01-31 2021-12-31 13F CHARLES RIV LABS INTL COM 159864107 25,412 3,299 14.92 9,575 4.93 0.5403
2021-11-15 2021-09-30 13F CHARLES RIV LABS INTL COM 159864107 22,113 2,190 10.99 9,125 23.81 0.6180
2021-08-09 2021-06-30 13F CHARLES RIV LABS INTL COM 159864107 19,923 1,868 10.35 7,370 40.84 0.5244
2021-05-10 2021-03-31 13F CHARLES RIV LABS INTL COM 159864107 18,055 6,376 54.59 5,233 79.34 0.4642
2021-02-04 2020-12-31 13F CHARLES RIV LABS INTL COM 159864107 11,679 966 9.02 2,918 20.28 0.3274
2020-10-19 2020-09-30 13F CHARLES RIV LABS INTL COM 159864107 10,713 1,330 14.17 2,426 48.29 0.3259
2020-08-13 2020-06-30 13F CHARLES RIV LABS INTL COM 159864107 9,383 756 8.76 1,636 50.23 0.2531
2020-05-06 2020-03-31 13F CHARLES RIV LABS INTL COM 159864107 8,627 8,627 1,089 0.2129
2020-02-14 2019-12-31 13F CHARLES RIV LABS INTL COM 159864107 0 -7,567 -100.00 0 -100.00
2019-11-05 2019-09-30 13F CHARLES RIV LABS INTL COM 159864107 7,567 2,582 51.80 1,002 41.73 0.1625
2019-08-20 2019-06-30 13F CHARLES RIV LABS INTL COM 159864107 4,985 319 6.84 707 4.28 0.1210
2019-05-14 2019-03-31 13F CHARLES RIV LABS INTL COM 159864107 4,666 4,666 678 0.1209
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.