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

SecurityCRL / Charles River Laboratories International, Inc.
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership664 shares
Latest Disclosed Value $ 132,626
Parallel Advisors, LLC ownership in CRL / Charles River Laboratories International, Inc.

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 664 shares of Charles River Laboratories International, Inc. (US:CRL) valued at $132,455 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 629 shares of Charles River Laboratories International, Inc.. This represents a change in shares of 5.56% during the quarter. The current value of the position is $119,434 USD.

Parallel Advisors, 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 .

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.

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)
2026-02-11 2025-12-31 13F CHARLES RIVER LABS HLDG Stock 159864107 664 35 5.56 133 34.69 0.0024
2025-11-13 2025-09-30 13F CHARLES RIVER LABS HLDG Stock 159864107 629 17 2.78 99 6.52 0.0018
2025-07-08 2025-06-30 13F CHARLES RIVER LABS HLDG Stock 159864107 612 138 29.11 93 29.58 0.0019
2025-04-08 2025-03-31 13F CHARLES RIVER LABS HLDG Stock 159864107 474 216 83.72 71 51.06 0.0016
2025-02-10 2024-12-31 13F CHARLES RIVER LABS HLDG Stock 159864107 258 82 46.59 48 38.24 0.0011
2024-11-13 2024-09-30 13F CHARLES RIVER LABS HLDG Stock 159864107 176 10 6.02 35 0.00 0.0008
2024-08-08 2024-06-30 13F CHARLES RIVER LABS HLDG Stock 159864107 166 -19 -10.27 34 -32.00 0.0009
2024-05-06 2024-03-31 13F CHARLES RIVER LABS HLDG Stock 159864107 185 19 11.45 50 28.21 0.0014
2024-02-12 2023-12-31 13F CHARLES RIVER LABS HLDG Stock 159864107 166 -59 -26.22 39 -11.36 0.0012
2024-05-20 2023-09-30 13F/A-1 CHARLES RIVER LABS HLDG Stock 159864107 225 30 15.38 44 10.00 0.0015
2023-11-14 2023-09-30 13F CHARLES RIVER LABS HLDG Stock 159864107 225 30 44 0.0015
2024-05-20 2023-06-30 13F/A-1 CHARLES RIVER LABS HLDG Stock 159864107 195 28 16.77 41 21.21 0.0013
2023-08-04 2023-06-30 13F CHARLES RIVER LABS HLDG Stock 159864107 195 28 41 0.0013
2024-05-20 2023-03-31 13F/A-1 CHARLES RIVER LABS HLDG Stock 159864107 167 -19 -10.22 34 -17.50 0.0011
2023-04-25 2023-03-31 13F CHARLES RIVER LABS HLDG Stock 159864107 167 -19 34 0.0011
2023-02-06 2022-12-31 13F CHARLES RIVER LABS HLDG Stock 159864107 186 -17 -8.37 41 0.00 0.0018
2022-11-10 2022-09-30 13F CHARLES RIVER LABS HLDG Stock 159864107 203 4 2.01 40 -6.98 0.0018
2022-08-01 2022-06-30 13F CHARLES RIVER LABS HLDG Stock 159864107 199 25 14.37 43 -14.00 0.0020
2022-04-28 2022-03-31 13F CHARLES RIVER LABS HLDG Stock 159864107 174 -89 -33.84 50 -49.49 0.0020
2022-01-20 2021-12-31 13F CHARLES RIVER LABS HLDG Stock 159864107 263 -52 -16.51 99 -23.85 0.0037
2021-11-02 2021-09-30 13F/A-1 CHARLES RIVER LABS HLDG Stock 159864107 315 75 31.25 130 46.07 0.0052
2021-08-06 2021-06-30 13F CHARLES RIVER LABS HLDG Stock 159864107 240 66 37.93 89 78.00 0.0038
2021-04-23 2021-03-31 13F CHARLES RIVER LABS HLDG Stock 159864107 174 46 35.94 50 56.25 0.0024
2021-02-02 2020-12-31 13F CHARLES RIVER LABS HLDG Stock 159864107 128 -42 -24.71 32 -15.79 0.0017
2020-10-27 2020-09-30 13F CHARLES RIVER LABS HLDG Stock 159864107 170 0 0.00 38 31.03 0.0024
2020-07-16 2020-06-30 13F CHARLES RIVER LABS HLDG Stock 159864107 170 -6 -3.41 29 31.82 0.0019
2020-04-27 2020-03-31 13F CHARLES RIVER LABS HLDG Stock 159864107 176 -28 -13.73 22 -29.03 0.0018
2020-01-30 2019-12-31 13F CHARLES RIVER LABS HLDG Stock 159864107 204 -3 -1.45 31 14.81 0.0023
2019-11-01 2019-09-30 13F CHARLES RIVER LABS HLDG Stock 159864107 207 23 12.50 27 3.85 0.0023
2019-08-05 2019-06-30 13F CHARLES RIVER LABS HLDG Stock 159864107 184 -32 -14.81 26 -16.13 0.0025
2019-05-01 2019-03-31 13F CHARLES RIVER LABS HLDG Stock 159864107 216 0 0.00 31 29.17 0.0035
2019-02-05 2018-12-31 13F CHARLES RIVER LABS HLDG Stock 159864107 216 0 0.00 24 -17.24 0.0033
2018-11-01 2018-09-30 13F CHARLES RIVER LABS HLDG Stock 159864107 216 0 0.00 29 20.83 0.0036
2018-07-30 2018-06-30 13F CHARLES RIVER LABS HLDG Stock 159864107 216 0 0.00 24 4.35 0.0034
2018-05-08 2018-03-31 13F CHARLES RIVER LABS HLDG Stock 159864107 216 0 0.00 23 -4.17 0.0036
2018-02-13 2017-12-31 13F CHARLES RIV LABS INTL INC COM Stock 159864107 216 0 0.00 24 9.09 0.0039
2017-11-15 2017-09-30 13F/A-1 CHARLES RIV LABS INTL INC COM Stock 159864107 216 0 0.00 22 4.76 0.0038
2017-08-07 2017-06-30 13F CHARLES RIV LABS INTL INC COM Stock 159864107 216 81 60.00 21 75.00 0.0040
2017-05-12 2017-03-31 13F/A-1 CHARLES RIV LABS INTL INC COM Stock 159864107 135 45 50.00 12 71.43 0.0024
2017-05-12 2017-03-31 13F CHARLES RIV LABS INTL INC COM Stock 159864107 135 12
2017-02-14 2016-12-31 13F CHARLES RIV LABS INTL INC COM Stock 159864107 90 90 7 0.0016
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
(%)
2022-01-19 2021-12-31 13F CHARLES RIVER LABS HLDG Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F CHARLES RIVER LABS HLDG Stock Call 240 89 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.