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Insider Trading Intelligence
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GM

George Massaro

CRL
DIRECTOR · CHARLES RIVER LABORATORIES INTERNATIONAL, INC. · CIK 0001221496
FILING MIX · LIFETIME21%/79%
BUYS
11
SELLS
41
TOTAL VALUE
$4.78M
COMPANIES
2
ACTIVE SINCE
Jan 2020
HOLDINGS NOW
23,318
AVG SELL PX
$277.80
TRADE KIND
SHOWING 52 / 52
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
38 backtested trades · 8 horizons · 8 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by George Massaro, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d38+60.53%-0.79%-0.05%-0.74%+0.30%-2.21
14d38+47.37%-0.28%+0.80%-1.08%-0.79%-2.17
30d38+15.79%+3.54%+2.41%+1.13%+0.24%1.12
60d38+10.53%+8.28%+4.66%+3.62%+3.56%2.77
90d38+34.21%+7.84%+6.69%+1.16%+0.75%0.55
180d38+39.47%+10.89%+10.53%+0.37%+2.70%0.14
1y38+57.89%+2.68%+15.16%-12.49%-23.03%-2.36
2y38(8 pending)+63.33%-17.25%+24.79%-42.04%-41.44%-11.21
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
CRL · 5,599 shares · as of May 15, 2025
03,2066,4139,61912,82520212022202320242025SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
FLOW · 11 buys / 41 sellsCOVERAGE · 22 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
24$139.05$3.3K5,575May 15, 2025May 16, 2025 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
35$136.32$4.8K5,680May 15, 2025May 16, 2025 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
81$137.68$11.2K5,599May 15, 2025May 16, 2025 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
21$140.78$3.0K5,743May 14, 2025May 15, 2025 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
7$143.77$1.0K5,722May 14, 2025May 15, 2025 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
7$145.54$1.0K5,715May 14, 2025May 15, 2025 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
91$139.95$12.7K5,764May 14, 2025May 15, 2025 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
14$141.85$2.0K5,729May 14, 2025May 15, 2025 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
113$235.61$26.6K5,951May 15, 2024May 15, 2024 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
123$234.72$28.9K6,064May 15, 2024May 15, 2024 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
96$236.78$22.7K5,855May 15, 2024May 15, 2024 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
PURCHASEGRANT
Stock grant
1,311$228.41$299.4K1,311May 13, 2024May 15, 2024 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
PURCHASEGRANT
Stock grant
559$228.41$127.7K6,187May 13, 2024May 15, 2024 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
PURCHASEGRANT
Stock grant
1,669$192.36$321.0K1,669May 15, 2023May 17, 2023 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
PURCHASEGRANT
Stock grant
664——5,628May 15, 2023May 17, 2023 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE10b5-1
10b5-1 plan
288$193.43$55.7K4,964May 11, 2023May 12, 2023 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
PURCHASEGRANT
Stock grant
575——5,252May 11, 2022May 13, 2022 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
PURCHASEGRANT
Stock grant
1,582$222.31$351.7K1,582May 11, 2022May 13, 2022 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
15$231.88$3.5K4,713May 9, 2022May 11, 2022 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
24$228.62$5.5K4,831May 9, 2022May 11, 2022 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
15$230.33$3.5K4,728May 9, 2022May 11, 2022 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
8$238.06$1.9K4,677May 9, 2022May 11, 2022 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
88$229.90$20.2K4,743May 9, 2022May 11, 2022 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
13$232.79$3.0K4,700May 9, 2022May 11, 2022 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
15$235.23$3.5K4,685May 9, 2022May 11, 2022 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
PURCHASE
2,539$164.24$417.0K7,394Aug 31, 2021Sep 1, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
1,556$442.16$688.0K5,838Aug 31, 2021Sep 1, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
2,539——0Aug 31, 2021Sep 1, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
983$442.99$435.5K4,855Aug 31, 2021Sep 1, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALEGRANT
Gift
500——4,855Aug 9, 2021Sep 1, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
110$321.06$35.3K5,356May 11, 2021May 12, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
1$323.29$3235,355May 11, 2021May 12, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
56$319.42$17.9K5,640May 11, 2021May 12, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
30$316.75$9.5K5,696May 11, 2021May 12, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
174$320.19$55.7K5,466May 11, 2021May 12, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
PURCHASEGRANT
Stock grant
355——5,726May 7, 2021May 10, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
PURCHASEGRANT
Stock grant
1,151——1,151May 7, 2021May 10, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
910$336.84$306.5K6,259May 6, 2021May 7, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
600$338.98$203.4K5,371May 6, 2021May 7, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
1,572$336.06$528.3K7,169May 6, 2021May 7, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
288$338.06$97.4K5,971May 6, 2021May 7, 2021 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
70$220.78$15.5K9,441Sep 14, 2020Sep 15, 2020 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
585$219.27$128.3K10,799Sep 14, 2020Sep 15, 2020 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
1,288$220.15$283.6K9,511Sep 14, 2020Sep 15, 2020 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALEGRANT
Gift
500——11,384Aug 7, 2020Sep 15, 2020 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
255$173.87$44.3K11,967May 22, 2020May 26, 2020 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
83$174.75$14.5K11,884May 22, 2020May 26, 2020 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
SALE
603$173.01$104.3K12,222May 22, 2020May 26, 2020 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
PURCHASEGRANT
Stock grant
2,539——2,539May 11, 2020May 12, 2020 ↗View →
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
PURCHASEGRANT
Stock grant
741——12,825May 11, 2020May 12, 2020 ↗View →
HURN
HURON CONSULTING GROUP INC.
SALE
760$43.56$33.1K17,719Apr 1, 2020Apr 3, 2020 ↗View →
HURN
HURON CONSULTING GROUP INC.
SALE
760$68.70$52.2K18,479Jan 2, 2020Jan 6, 2020 ↗View →
Other insiders · CRL
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About this filer
CIK 0001221496
ROLE
Director
PRIMARY
CRL
COMPANIES
2
ACTIVE SINCE
Jan 2020
MARKETPEEL · /INSIDER/0001221496DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

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