Charles River Laboratories (CRL) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Oct 2, 2026.
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- Filings shown
- 12
- Open-market buys
- 1
- Open-market sells
- 17
- Buys, 10b5-1 box not checked
- 1 of 1
Counts cover the 12 most recent Form 4 filings Tradune holds for CRL (filed Aug 6 – Oct 2, 2026). No completed check of CRL's Form 4 list on SEC EDGAR is on record yet; the latest CRL filing Tradune holds was filed Oct 2, 2026. This is not guaranteed to be the complete record — see CRL's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 12 filings Tradune holds for CRL filed Aug 6 – Oct 2, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
17 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 6 sales· 79,593 sh
- checkbox disclosed
- On filings with the box not checked
- 11 sales· 11,397 sh
- not proof that no plan exists
- Not comparable
- 0 sales· 0 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Michael Gunnar KnellSVP, Finance and CAO | 0 | 9 | — | 6,645 | −$1,730,250 |
| Shannon M. ParisottoCEVP, Disc & Safety Assessment | 0 | 3 | — | 10,799 | −$2,965,466 |
| James C. FosterDirector | 0 | 2 | — | 62,294 | −$17,969,875 |
| Birgit GirshickChief Executive Officer | 0 | 1 | — | 6,500 | −$1,819,350 |
| Victoria L. CreamerEVP & Chief People Officer | 0 | 1 | — | 4,179 | −$1,083,030 |
| Nancy C. AndrewsDirector | 0 | 1 | — | 573 | −$163,443 |
| Glenn ColemanEVP & Chief Financial Officer | 1 | 0 | 10 | — | +$2,974 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at CRL
Insiders reported 1 open-market purchase of CRL in the trailing 90 days, across 1 distinct buyer. The most recent purchase was reported by Glenn Coleman (EVP & Chief Financial Officer) on Sep 30, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 10 | $297.43 | 27,762 | +0.0% | Sep 30, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Stock Options (Right to Buy) | 21,132 | — | — | — | Aug 25, 2026 |
| Option exercise | 21,132 | $194.12 | 52,728 | +67% | Aug 25, 2026 |
| Option exercise Stock Options (Right to Buy) | 12,429 | — | — | — | Aug 25, 2026 |
| Open-market sale 10b5-1 box checked | 33,561 | $300.00 | 31,596 | −52% | Aug 25, 2026 |
| Option exercise | 12,429 | $208.44 | 65,157 | +24% | Aug 25, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Gift | 528 | — | 35,485 | −1.5% | Aug 19, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 2,039 | $194.12 | 6,846 | +42% | Aug 19, 2026 |
| Open-market sale 10b5-1 box checked | 2,039 | $294.12 | 4,807 | −30% | Aug 19, 2026 |
| Option exercise Stock Options (Right to Buy) | 2,039 | — | — | — | Aug 19, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 573 | $285.24 | 1,438 | −28% | Aug 18, 2026 |
| Option exercise Stock Options (Right to Buy) | 573 | — | — | — | Aug 18, 2026 |
| Option exercise | 573 | $164.30 | 2,011 | +40% | Aug 18, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 6,500 | $279.90 | 36,013 | −15% | Aug 11, 2026 |
| Option exercise Stock Options (Right to Buy) | 6,500 | — | — | — | Aug 11, 2026 |
| Option exercise | 6,500 | $179.66 | 42,513 | +18% | Aug 11, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 3,714 | $179.66 | 8,521 | +77% | Aug 11, 2026 |
| Open-market sale 10b5-1 box checked | 3,714 | $279.66 | 4,807 | −44% | Aug 11, 2026 |
| Option exercise Stock Options (Right to Buy) | 3,714 | — | — | — | Aug 11, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Gift | 257 | — | 31,041 | −0.8% | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Stock Options (Right to Buy) | 28,733 | — | — | — | Aug 10, 2026 |
| Option exercise | 28,733 | $179.66 | 60,329 | +91% | Aug 10, 2026 |
| Open-market sale 10b5-1 box checked | 28,733 | $275.00 | 31,596 | −48% | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 810 | $261.45 | 13,167 | −5.8% | Aug 6, 2026 |
| Open-market sale 10b5-1 box not checked | 901 | $260.63 | 13,977 | −6.1% | Aug 6, 2026 |
| Open-market sale 10b5-1 box not checked | 213 | $262.37 | 12,954 | −1.6% | Aug 6, 2026 |
| Open-market sale 10b5-1 box not checked | 620 | $263.94 | 12,334 | −4.8% | Aug 6, 2026 |
| Open-market sale 10b5-1 box not checked | 482 | $265.17 | 11,852 | −3.9% | Aug 6, 2026 |
| Option exercise | 404 | $179.66 | 12,256 | +3.4% | Aug 6, 2026 |
| Option exercise | 1,205 | $194.12 | 13,461 | +9.8% | Aug 6, 2026 |
| Option exercise | 736 | $208.44 | 14,197 | +5.5% | Aug 6, 2026 |
| Open-market sale 10b5-1 box not checked | 404 | $258.53 | 13,793 | −2.8% | Aug 6, 2026 |
| Open-market sale 10b5-1 box not checked | 1,205 | $258.53 | 12,588 | −8.7% | Aug 6, 2026 |
| Open-market sale 10b5-1 box not checked | 736 | $258.53 | 11,852 | −5.8% | Aug 6, 2026 |
| Option exercise Stock Options (Right to Buy) | 404 | — | — | — | Aug 6, 2026 |
| Option exercise Stock Options (Right to Buy) | 1,205 | — | — | — | Aug 6, 2026 |
| Option exercise Stock Options (Right to Buy) | 736 | — | — | — | Aug 6, 2026 |
| Open-market sale 10b5-1 box not checked | 1,274 | $259.07 | 14,878 | −7.9% | Aug 6, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 4,179 | $179.66 | 34,230 | +14% | Aug 6, 2026 |
| Open-market sale 10b5-1 box not checked | 4,179 | $259.16 | 30,051 | −12% | Aug 6, 2026 |
| Option exercise Stock Options (Right to Buy) | 4,179 | — | — | — | Aug 6, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 5,046 | $263.00 | 4,807 | −51% | Aug 5, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to CRL's (Oct 2, 2026).
Frequently asked about CRL insider activity
How many insiders bought CRL stock in the last 90 days?
1 distinct insider at Charles River Laboratories reported 1 open-market purchase (Form 4 code P) of CRL shares in the trailing 90 days, the most recent filed by Glenn Coleman (EVP & Chief Financial Officer) on Sep 30, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Who filed the most recent Form 4 for CRL?
The most recent Form 4 on this page was filed by Glenn Coleman (EVP & Chief Financial Officer) on Oct 2, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market CRL insider sale shown?
The largest open-market sale among the filings shown was 33,561 CRL shares at $300.00 (about $10,068,300) by James C. Foster (Director) on Aug 25, 2026. Value is shares × the price reported on the Form 4; that Form 4 has the Rule 10b5-1 box checked.
Do the recent CRL insider purchases have the Form 4 10b5-1 box checked?
No. The one CRL open-market purchase shown was reported with the Rule 10b5-1 box not checked. A blank box records what the filer disclosed; it does not prove that no plan exists. Latest: Glenn Coleman (EVP & Chief Financial Officer) on Sep 30, 2026, 10 shares.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track CRL insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.