Charles River Laboratories International, Inc.
MX ˙ BMV ˙ US1598641074
SecurityMX:CRL / Charles River Laboratories International, Inc.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership934,045 shares
Latest Disclosed Value $ 161,122,762
Millennium Management Llc ownership in CRL / Charles River Laboratories International, Inc.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 934,045 shares of Charles River Laboratories International, Inc. (MX:CRL) valued at $161,122,762 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 330,113 shares of Charles River Laboratories International, Inc.. This represents a change in shares of 182.95% during the quarter.

Millennium Management Llc has a history of taking positions in derivatives of the underlying security (CRL) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:CRL / Charles River Laboratories International, Inc. Historical Put/Call Ratio
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 934,045 603,932 182.95 161,123 144.68 0.0671
2026-02-17 2025-12-31 13F CHARLES RIV LABS INTL COM 159864107 330,113 -134,985 -29.02 65,851 -9.51 0.0277
2025-11-14 2025-09-30 13F CHARLES RIV LABS INTL COM 159864107 465,098 -42,224 -8.32 72,769 -5.46 0.0311
2025-08-14 2025-06-30 13F CHARLES RIV LABS INTL COM 159864107 507,322 432,818 580.93 76,976 586.42 0.0372
2025-05-15 2025-03-31 13F CHARLES RIV LABS INTL COM 159864107 74,504 -297,720 -79.98 11,214 -83.68 0.0060
2025-02-14 2024-12-31 13F CHARLES RIV LABS INTL COM 159864107 372,224 354,086 1,952.18 68,713 1,823.63 0.0336
2024-11-14 2024-09-30 13F CHARLES RIV LABS INTL COM 159864107 18,138 6,815 60.19 3,573 52.71 0.0017
2024-08-14 2024-06-30 13F CHARLES RIV LABS INTL COM 159864107 11,323 -124,737 -91.68 2,339 -93.66 0.0011
2024-05-15 2024-03-31 13F CHARLES RIV LABS INTL COM 159864107 136,060 83,201 157.40 36,865 195.04 0.0157
2024-02-14 2023-12-31 13F CHARLES RIV LABS INTL COM 159864107 52,859 19,334 57.67 12,496 90.18 0.0054
2023-11-14 2023-09-30 13F CHARLES RIV LABS INTL COM 159864107 33,525 -80,778 -70.67 6,570 -72.66 0.0033
2023-08-14 2023-06-30 13F CHARLES RIV LABS INTL COM 159864107 114,303 4,518 4.12 24,032 8.46 0.0119
2023-05-15 2023-03-31 13F CHARLES RIV LABS INTL COM 159864107 109,785 -328,002 -74.92 22,157 -76.77 0.0127
2023-02-14 2022-12-31 13F CHARLES RIV LABS INTL COM 159864107 437,787 437,787 95,394 0.0528
2022-11-14 2022-09-30 13F CHARLES RIV LABS INTL COM 159864107 0 -2,568 -100.00 0 -100.00
2022-08-15 2022-06-30 13F CHARLES RIV LABS INTL COM 159864107 2,568 -229,111 -98.89 549 -99.17 0.0003
2022-05-16 2022-03-31 13F CHARLES RIV LABS INTL COM 159864107 231,679 15,668 7.25 65,790 -19.17 0.0349
2022-02-14 2021-12-31 13F CHARLES RIV LABS INTL COM 159864107 216,011 -8,166 -3.64 81,389 -12.02 0.0414
2021-11-15 2021-09-30 13F CHARLES RIV LABS INTL COM 159864107 224,177 111,271 98.55 92,511 121.50 0.0555
2021-08-16 2021-06-30 13F CHARLES RIV LABS INTL COM 159864107 112,906 -71,105 -38.64 41,766 -21.69 0.0256
2021-05-17 2021-03-31 13F CHARLES RIV LABS INTL COM 159864107 184,011 -176,399 -48.94 53,332 -40.78 0.0382
2021-02-16 2020-12-31 13F CHARLES RIV LABS INTL COM 159864107 360,410 39,573 12.33 90,052 23.95 0.0650
2020-11-16 2020-09-30 13F CHARLES RIV LABS INTL COM 159864107 320,837 32,378 11.22 72,654 44.46 0.0895
2020-08-14 2020-06-30 13F CHARLES RIV LABS INTL COM 159864107 288,459 147,687 104.91 50,293 183.07 0.0689
2020-05-14 2020-03-31 13F CHARLES RIV LABS INTL COM 159864107 140,772 -330,998 -70.16 17,767 -75.35 0.0399
2020-02-14 2019-12-31 13F CHARLES RIV LABS INTL COM 159864107 471,770 461,780 4,622.42 72,068 5,351.44 0.0902
2019-11-14 2019-09-30 13F CHARLES RIV LABS INTL COM 159864107 9,990 -382,101 -97.45 1,322 -97.62 0.0021
2019-08-15 2019-06-30 13F/A-1 CHARLES RIV LABS INTL COM 159864107 392,091 -255,800 -39.48 55,638 -40.88 0.0836
2019-08-14 2019-06-30 13F CHARLES RIV LABS INTL COM 159864107 392,091 -255,800 55,638
2019-05-14 2019-03-31 13F CHARLES RIV LABS INTL COM 159864107 647,891 446,792 222.18 94,106 313.47 0.1408
2019-02-15 2018-12-31 13F/A-1 CHARLES RIV LABS INTL COM 159864107 201,099 192,669 2,285.52 22,760 1,907.05 0.0355
2019-02-14 2018-12-31 13F CHARLES RIV LABS INTL COM 159864107 201,099 22,760
2018-11-14 2018-09-30 13F CHARLES RIV LABS INTL COM 159864107 8,430 -16,749 -66.52 1,134 -59.89 0.0014
2018-08-14 2018-06-30 13F CHARLES RIV LABS INTL COM 159864107 25,179 -330,708 -92.93 2,827 -92.56 0.0037
2018-05-15 2018-03-31 13F CHARLES RIV LABS INTL COM 159864107 355,887 350,454 6,450.47 37,987 6,284.37 0.0507
2018-02-14 2017-12-31 13F CHARLES RIV LABS INTL COM 159864107 5,433 -216,504 -97.55 595 -97.52 0.0008
2017-11-14 2017-09-30 13F CHARLES RIV LABS INTL COM 159864107 221,937 -1,006,102 -81.93 23,974 -80.70 0.0365
2017-08-14 2017-06-30 13F CHARLES RIV LABS INTL COM 159864107 1,228,039 208,111 20.40 124,216 35.40 0.2216
2017-05-15 2017-03-31 13F CHARLES RIV LABS INTL COM 159864107 1,019,928 -165,743 -13.98 91,743 1.56 0.1681
2017-02-14 2016-12-31 13F CHARLES RIV LABS INTL COM 159864107 1,185,671 112,030 10.43 90,336 0.96 0.1892
2016-11-14 2016-09-30 13F CHARLES RIV LABS INTL COM 159864107 1,073,641 704,275 190.67 89,477 193.84 0.1500
2016-08-15 2016-06-30 13F CHARLES RIV LABS INTL COM 159864107 369,366 -277,627 -42.91 30,451 -38.02 0.0697
2016-05-16 2016-03-31 13F CHARLES RIV LABS INTL COM 159864107 646,993 218,704 51.06 49,133 42.70 0.1228
2016-02-16 2015-12-31 13F CHARLES RIV LABS INTL COM 159864107 428,289 107,847 33.66 34,430 69.16 0.0724
2015-11-16 2015-09-30 13F CHARLES RIV LABS INTL COM 159864107 320,442 108,867 51.46 20,354 36.77 0.0394
2015-08-14 2015-06-30 13F CHARLES RIV LABS INTL COM 159864107 211,575 -333,846 -61.21 14,882 -65.59 0.0281
2015-05-15 2015-03-31 13F CHARLES RIV LABS INTL COM 159864107 545,421 353,246 183.81 43,246 253.61 0.0805
2015-02-17 2014-12-31 13F CHARLES RIV LABS INTL COM 159864107 192,175 87,032 82.77 12,230 94.71 0.0259
2014-11-14 2014-09-30 13F CHARLES RIV LABS INTL COM 159864107 105,143 -79,954 -43.20 6,281 -36.59 0.0159
2014-08-14 2014-06-30 13F CHARLES RIV LABS INTL COM 159864107 185,097 -717,491 -79.49 9,906 -81.81 0.0274
2014-05-15 2014-03-31 13F CHARLES RIV LABS INTL COM 159864107 902,588 668,977 286.36 54,462 339.53 0.1578
2014-02-14 2013-12-31 13F CHARLES RIV LABS INTL COM 159864107 233,611 -155,186 -39.91 12,391 -31.11 0.0391
2013-11-14 2013-09-30 13F CHARLES RIV LABS INTL COM 159864107 388,797 182,220 88.21 17,986 112.20 0.0579
2013-08-14 2013-06-30 13F CHARLES RIV LABS INTL COM 159864107 206,577 206,577 8,476 0.0260
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F CHARLES RIV LABS INTL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-17 2025-12-31 13F CHARLES RIV LABS INTL COM Call 35,900 7,161 n/a n/a n/a
2025-11-14 2025-09-30 13F CHARLES RIV LABS INTL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F CHARLES RIV LABS INTL COM Call 46,500 7,055 n/a n/a n/a
2025-02-14 2024-12-31 13F CHARLES RIV LABS INTL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-14 2024-09-30 13F CHARLES RIV LABS INTL COM Call 10,600 -66.03 2,088 -67.62 n/a n/a n/a
2024-08-14 2024-06-30 13F CHARLES RIV LABS INTL COM Call 31,200 91.41 6,445 45.95 n/a n/a n/a
2024-05-15 2024-03-31 13F CHARLES RIV LABS INTL COM Call 16,300 63.00 4,416 86.80 n/a n/a n/a
2024-02-14 2023-12-31 13F CHARLES RIV LABS INTL COM Call 10,000 -80.04 2,364 -75.92 n/a n/a n/a
2023-11-14 2023-09-30 13F CHARLES RIV LABS INTL COM Call 50,100 115.02 9,819 100.45 n/a n/a n/a
2023-08-14 2023-06-30 13F CHARLES RIV LABS INTL COM Call 23,300 133.00 4,899 142.72 n/a n/a n/a
2023-05-15 2023-03-31 13F CHARLES RIV LABS INTL COM Call 10,000 2,018 n/a n/a n/a
2023-02-14 2022-12-31 13F CHARLES RIV LABS INTL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-14 2022-09-30 13F CHARLES RIV LABS INTL COM Call 32,400 -7.43 6,376 -14.86 n/a n/a n/a
2022-08-15 2022-06-30 13F CHARLES RIV LABS INTL COM Call 35,000 169.23 7,489 102.84 n/a n/a n/a
2022-05-16 2022-03-31 13F CHARLES RIV LABS INTL COM Call 13,000 333.33 3,692 226.73 n/a n/a n/a
2022-02-14 2021-12-31 13F CHARLES RIV LABS INTL COM Call 3,000 1,130 n/a n/a n/a
2020-05-14 2020-03-31 13F CHARLES RIV LABS INTL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-02-14 2019-12-31 13F CHARLES RIV LABS INTL COM Call 135,000 20,623 n/a n/a n/a
2019-05-14 2019-03-31 13F CHARLES RIV LABS INTL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-02-15 2018-12-31 13F/A CHARLES RIV LABS INTL COM Call 35,000 3,961 n/a n/a n/a
2019-02-14 2018-12-31 13F CHARLES RIV LABS INTL COM Call 35,000 3,961 n/a n/a n/a
2018-08-14 2018-06-30 13F CHARLES RIV LABS INTL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2018-05-15 2018-03-31 13F CHARLES RIV LABS INTL COM Call 10,000 100.00 1,067 302.64 n/a n/a n/a
2014-02-14 2013-12-31 13F CHARLES RIV LABS INTL COM Call 5,000 265 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-11-14 2025-09-30 13F CHARLES RIV LABS INTL COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F CHARLES RIV LABS INTL COM Put 1,500 228 n/a n/a n/a
2025-05-15 2025-03-31 13F CHARLES RIV LABS INTL COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-14 2024-12-31 13F CHARLES RIV LABS INTL COM Put 1,600 -99.13 295 -99.18 n/a n/a n/a
2024-11-14 2024-09-30 13F CHARLES RIV LABS INTL COM Put 183,500 773.81 36,144 733.17 n/a n/a n/a
2024-08-14 2024-06-30 13F CHARLES RIV LABS INTL COM Put 21,000 -75.21 4,338 -81.10 n/a n/a n/a
2024-05-15 2024-03-31 13F CHARLES RIV LABS INTL COM Put 84,700 -28.10 22,949 -17.59 n/a n/a n/a
2024-02-14 2023-12-31 13F CHARLES RIV LABS INTL COM Put 117,800 915.52 27,848 1,125.12 n/a n/a n/a
2023-11-14 2023-09-30 13F CHARLES RIV LABS INTL COM Put 11,600 -22.15 2,273 -27.43 n/a n/a n/a
2023-08-14 2023-06-30 13F CHARLES RIV LABS INTL COM Put 14,900 -21.58 3,133 -18.33 n/a n/a n/a
2023-05-15 2023-03-31 13F CHARLES RIV LABS INTL COM Put 19,000 280.00 3,835 251.83 n/a n/a n/a
2023-02-14 2022-12-31 13F CHARLES RIV LABS INTL COM Put 5,000 -70.59 1,090 -67.42 n/a n/a n/a
2022-11-14 2022-09-30 13F CHARLES RIV LABS INTL COM Put 17,000 142.86 3,346 123.36 n/a n/a n/a
2022-08-15 2022-06-30 13F CHARLES RIV LABS INTL COM Put 7,000 40.00 1,498 5.49 n/a n/a n/a
2022-05-16 2022-03-31 13F CHARLES RIV LABS INTL COM Put 5,000 1,420 n/a n/a n/a
2022-02-14 2021-12-31 13F CHARLES RIV LABS INTL COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-15 2021-09-30 13F CHARLES RIV LABS INTL COM Put 40,000 14.29 16,507 27.50 n/a n/a n/a
2021-08-16 2021-06-30 13F CHARLES RIV LABS INTL COM Put 35,000 75.00 12,947 123.34 n/a n/a n/a
2021-05-17 2021-03-31 13F CHARLES RIV LABS INTL COM Put 20,000 0.00 5,797 16.01 n/a n/a n/a
2021-02-16 2020-12-31 13F CHARLES RIV LABS INTL COM Put 20,000 -31.03 4,997 -23.91 n/a n/a n/a
2020-11-16 2020-09-30 13F CHARLES RIV LABS INTL COM Put 29,000 190.00 6,567 276.55 n/a n/a n/a
2020-08-14 2020-06-30 13F CHARLES RIV LABS INTL COM Put 10,000 1,744 n/a n/a n/a
2020-02-14 2019-12-31 13F CHARLES RIV LABS INTL COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-11-14 2019-09-30 13F CHARLES RIV LABS INTL COM Put 20,000 2,647 n/a n/a n/a
2019-08-15 2019-06-30 13F/A CHARLES RIV LABS INTL COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-05-14 2019-03-31 13F CHARLES RIV LABS INTL COM Put 50,000 900.00 7,263 1,183.22 n/a n/a n/a
2019-02-15 2018-12-31 13F/A CHARLES RIV LABS INTL COM Put 5,000 566 n/a n/a n/a
2019-02-14 2018-12-31 13F CHARLES RIV LABS INTL COM Put 5,000 566 n/a n/a n/a
2018-02-14 2017-12-31 13F CHARLES RIV LABS INTL COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-11-14 2017-09-30 13F CHARLES RIV LABS INTL COM Put 10,000 132.56 1,080 373.68 n/a n/a n/a
2014-02-14 2013-12-31 13F CHARLES RIV LABS INTL COM Put 4,300 228 n/a n/a n/a
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.