Charles River Laboratories International, Inc.
MX ˙ BMV ˙ US1598641074
SecurityMX:CRL / Charles River Laboratories International, Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership731,465 shares
Latest Disclosed Value $ 126,177,713
UBS Group AG ownership in CRL / Charles River Laboratories International, Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 731,465 shares of Charles River Laboratories International, Inc. (MX:CRL) valued at $126,177,713 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 388,827 shares of Charles River Laboratories International, Inc.. This represents a change in shares of 88.12% during the quarter.

UBS Group AG has a history of taking positions in derivatives of the underlying security (CRL) in the form of stock options.

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)
2026-05-05 2026-03-31 13F CHARLES RIV LABS INTL COM 159864107 731,465 342,638 88.12 126,178 62.68 0.0035
2026-01-29 2025-12-31 13F CHARLES RIV LABS INTL COM 159864107 388,827 -203,929 -34.40 77,563 -16.37 0.0126
2025-11-13 2025-09-30 13F CHARLES RIV LABS INTL COM 159864107 592,756 -142,513 -19.38 92,743 -16.87 0.0145
2025-08-14 2025-06-30 13F CHARLES RIV LABS INTL COM 159864107 735,269 -1,656,516 -69.26 111,562 -69.01 0.0193
2025-05-13 2025-03-31 13F CHARLES RIV LABS INTL COM 159864107 2,391,785 2,056,123 612.56 360,011 481.01 0.0662
2025-02-14 2024-12-31 13F CHARLES RIV LABS INTL COM 159864107 335,662 171,746 104.78 61,963 91.92 0.0115
2024-11-14 2024-09-30 13F CHARLES RIV LABS INTL COM 159864107 163,916 17,474 11.93 32,287 6.73 0.0070
2024-08-14 2024-06-30 13F CHARLES RIV LABS INTL COM 159864107 146,442 25,295 20.88 30,252 -7.84 0.0075
2024-05-13 2024-03-31 13F CHARLES RIV LABS INTL COM 159864107 121,147 26,272 27.69 32,825 46.35 0.0082
2024-02-09 2023-12-31 13F CHARLES RIV LABS INTL COM 159864107 94,875 -7,137 -7.00 22,428 12.18 0.0067
2023-11-09 2023-09-30 13F CHARLES RIV LABS INTL COM 159864107 102,012 -8,850 -7.98 19,992 -14.23 0.0069
2023-08-11 2023-06-30 13F CHARLES RIV LABS INTL COM 159864107 110,862 2,351 2.17 23,309 6.43 0.0079
2023-05-12 2023-03-31 13F CHARLES RIV LABS INTL COM 159864107 108,511 24,061 28.49 21,900 19.01 0.0080
2023-02-08 2022-12-31 13F CHARLES RIV LABS INTL COM 159864107 84,450 30,663 57.01 18,402 73.84 0.0069
2022-11-10 2022-09-30 13F CHARLES RIV LABS INTL COM 159864107 53,787 23,931 80.15 10,585 65.68 0.0046
2022-08-10 2022-06-30 13F CHARLES RIV LABS INTL COM 159864107 29,856 -22,669 -43.16 6,389 -57.17 0.0026
2022-05-16 2022-03-31 13F CHARLES RIV LABS INTL COM 159864107 52,525 -27,695 -34.52 14,916 -50.65 0.0050
2022-02-14 2021-12-31 13F CHARLES RIV LABS INTL COM 159864107 80,220 -9,338 -10.43 30,226 -18.21 0.0087
2021-11-15 2021-09-30 13F CHARLES RIV LABS INTL COM 159864107 89,558 14,676 19.60 36,957 33.42 0.0116
2021-08-13 2021-06-30 13F CHARLES RIV LABS INTL COM 159864107 74,882 18,186 32.08 27,700 68.57 0.0089
2021-05-12 2021-03-31 13F CHARLES RIV LABS INTL COM 159864107 56,696 -8,434 -12.95 16,432 0.97 0.0055
2021-02-11 2020-12-31 13F CHARLES RIV LABS INTL COM 159864107 65,130 15,874 32.23 16,274 45.89 0.0055
2020-11-12 2020-09-30 13F CHARLES RIV LABS INTL COM 159864107 49,256 28,000 131.73 11,155 201.00 0.0042
2020-07-31 2020-06-30 13F CHARLES RIV LABS INTL COM 159864107 21,256 -637 -2.91 3,706 34.13 0.0016
2020-05-01 2020-03-31 13F CHARLES RIV LABS INTL COM 159864107 21,893 -56,121 -71.94 2,763 -76.82 0.0013
2020-02-14 2019-12-31 13F CHARLES RIV LABS INTL COM 159864107 78,014 43,182 123.97 11,918 158.52 0.0041
2019-11-14 2019-09-30 13F CHARLES RIV LABS INTL COM 159864107 34,832 3,737 12.02 4,610 4.49 0.0018
2019-08-14 2019-06-30 13F CHARLES RIV LABS INTL COM 159864107 31,095 -3,531 -10.20 4,412 -12.29 0.0017
2019-05-14 2019-03-31 13F CHARLES RIV LABS INTL COM 159864107 34,626 1,100 3.28 5,030 32.54 0.0021
2019-02-14 2018-12-31 13F CHARLES RIV LABS INTL COM 159864107 33,526 -5,673 -14.47 3,795 -28.04 0.0017
2018-11-14 2018-09-30 13F CHARLES RIV LABS INTL COM 159864107 39,199 8,605 28.13 5,274 53.58 0.0021
2018-08-14 2018-06-30 13F CHARLES RIV LABS INTL COM 159864107 30,594 -1,090 -3.44 3,434 1.54 0.0015
2018-05-15 2018-03-31 13F CHARLES RIV LABS INTL COM 159864107 31,684 400 1.28 3,382 -1.23 0.0015
2018-02-14 2017-12-31 13F CHARLES RIV LABS INTL COM 159864107 31,284 -7,021 -18.33 3,424 -17.25 0.0014
2017-11-14 2017-09-30 13F CHARLES RIV LABS INTL COM 159864107 38,305 9,207 31.64 4,138 40.56 0.0019
2017-11-14 2017-06-30 13F/A-1 CHARLES RIV LABS INTL COM 159864107 29,098 -3,572 -10.93 2,944 0.17 0.0015
2017-08-14 2017-06-30 13F CHARLES RIV LABS INTL COM 159864107 29,098 -3,572 2,944
2017-11-14 2017-03-31 13F/A-1 CHARLES RIV LABS INTL COM 159864107 32,670 -11,310 -25.72 2,939 -12.27 0.0016
2017-05-12 2017-03-31 13F CHARLES RIV LABS INTL COM 159864107 32,670 -11,310 2,939
2017-02-14 2016-12-31 13F CHARLES RIV LABS INTL COM 159864107 43,980 -17,547 -28.52 3,350 -34.67 0.0018
2016-11-14 2016-09-30 13F CHARLES RIV LABS INTL COM 159864107 61,527 -45,566 -42.55 5,128 -41.92 0.0031
2016-08-12 2016-06-30 13F CHARLES RIV LABS INTL COM 159864107 107,093 28,578 36.40 8,829 48.09 0.0055
2016-05-12 2016-03-31 13F CHARLES RIV LABS INTL COM 159864107 78,515 -12,526 -13.76 5,962 -18.54 0.0040
2016-02-16 2015-12-31 13F CHARLES RIV LABS INTL COM 159864107 91,041 44,416 95.26 7,319 147.18 0.0048
2015-11-13 2015-09-30 13F CHARLES RIV LABS INTL COM 159864107 46,625 -12,833 -21.58 2,961 -29.20 0.0021
2015-08-14 2015-06-30 13F CHARLES RIV LABS INTL COM 159864107 59,458 -2,473 -3.99 4,182 -14.84 0.0028
2015-05-14 2015-03-31 13F CHARLES RIV LABS INTL COM 159864107 61,931 31,829 105.74 4,911 156.32 0.0034
2015-02-17 2014-12-31 13F CHARLES RIV LABS INTL COM 159864107 30,102 30,102 1,916 0.0013
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
(%)
2019-08-14 2019-06-30 13F 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 19,600 2,847 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.