Charles River Laboratories International, Inc.
US ˙ NYSE ˙ US1598641074

SecurityCRL / Charles River Laboratories International, Inc.
InstitutionAmundi
Latest Disclosed Ownership773,315 shares
Latest Disclosed Value $ 133,396,838
Amundi reports 175.19% increase in ownership of CRL / Charles River Laboratories International, Inc.

On May 15, 2026 - Amundi filed a 13F-HR form disclosing ownership of 773,315 shares of Charles River Laboratories International, Inc. (US:CRL) valued at $133,396,838 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 281,014 shares of Charles River Laboratories International, Inc.. This represents a change in shares of 175.19% during the quarter. The current value of the position is $139,096,169 USD.

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.

Upgrade to unlock premium data and export to Excel .

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 773,315 492,301 175.19 133,397 137.97 0.0153
2026-02-17 2025-12-31 13F CHARLES RIV LABS INTL COM 159864107 281,014 -29,160 -9.40 56,057 3.30 0.0152
2025-11-14 2025-09-30 13F CHARLES RIV LABS INTL COM 159864107 310,174 83,917 37.09 54,265 52.29 0.0174
2025-08-13 2025-06-30 13F CHARLES RIV LABS INTL COM 159864107 226,257 209,910 1,284.09 35,633 1,446.57 0.0123
2025-05-15 2025-03-31 13F CHARLES RIVER LABORATORIES INT COM 159864107 16,347 -53,919 -76.74 2,305 -82.55 0.0008
2025-02-07 2024-12-31 13F CHARLES RIVER LABORATORIES INT COM 159864107 70,266 16,599 30.93 13,204 31.69 0.0046
2024-11-13 2024-09-30 13F CHARLES RIVER LABORATORIES INT COM 159864107 53,667 -4,643 -7.96 10,027 -14.63 0.0037
2024-08-14 2024-06-30 13F CHARLES RIVER LABORATORIES INT COM 159864107 58,310 608 1.05 11,745 -10.56 0.0045
2024-05-15 2024-03-31 13F CHARLES RIVER LABORATORIES INT COM 159864107 57,702 -12,888 -18.26 13,130 -13.56 0.0056
2024-02-14 2023-12-31 13F CHARLES RIVER LABORATORIES INT COM 159864107 70,590 25,896 57.94 15,190 77.93 0.0068
2023-11-14 2023-09-30 13F CHARLES RIVER LABORATORIES INT COM 159864107 44,694 -22,543 -33.53 8,537 -39.15 0.0042
2023-08-14 2023-06-30 13F CHARLES RIVER LABORATORIES INT COM 159864107 67,237 -109,173 -61.89 14,030 -59.37 0.0071
2023-05-15 2023-03-31 13F CHARLES RIVER LABORATORIES INT COM 159864107 176,410 63,983 56.91 34,530 24.38 0.0186
2023-02-14 2022-12-31 13F CHARLES RIVER LABORATORIES INT COM 159864107 112,427 -25,753 -18.64 27,763 -6.74 0.0152
2022-11-14 2022-09-30 13F CHARLES RIVER LABORATORIES INT COM 159864107 138,180 -55,123 -28.52 29,768 -26.81 0.0176
2022-09-02 2022-06-30 13F/A-1 CHARLES RIVER LABORATORIES INT COM 159864107 193,303 49,086 34.04 40,675 -6.62 0.0326
2022-08-15 2022-06-30 13F CHARLES RIVER LABORATORIES INT COM 159864107 193,303 49,086 40,675 0.0021
2022-05-16 2022-03-31 13F CHARLES RIVER LABORATORIES INT COM 159864107 144,217 4,915 3.53 43,558 -11.13 0.0295
2022-02-14 2021-12-31 13F CHARLES RIVER LABORATORIES INT COM 159864107 139,302 -51,448 -26.97 49,013 -37.74 0.0311
2021-11-15 2021-09-30 13F CHARLES RIVER LABORATORIES INT COM 159864107 190,750 35,082 22.54 78,717 138,000.00 0.0552
2021-08-16 2021-06-30 13F CHARLES RIVER LABORATORIES INT COM 159864107 155,668 155,668 58 0.0400
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.