Birgit Girshick

CIK: 0001732091

Transaction Breakdown

Open Market Buys (P)1 (4.5%)

High conviction signal

Open Market Sales (S)1 (4.5%)

Position reduction

Option Exercises (M)1 (4.5%)

Derivative conversions

Awards (A)4 (18.2%)

Compensation grants

Other (G, F, J, C, D, …)15 (68.2%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

CRL

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (22 total)

CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Aug 19, 2026
Gift(G)
Direct
528 shares-
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Aug 11, 2026
Exercise(M)
Direct
6.5K shares at avg. $179.66$1.2M
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Aug 11, 2026
Sale(S)
Direct
6.5K shares at avg. $279.90$1.8M
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Jun 5, 2026
Gift(G)
Indirect
3.4K shares-
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Jun 5, 2026
Gift(G)
Direct
3.4K shares-
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
May 31, 2026
Tax Payment(F)
Direct
378 shares at avg. $180.71$68K
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
May 30, 2026
Tax Payment(F)
Direct
1.2K shares at avg. $180.71$218K
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
May 29, 2026
Award(A)
Direct
10K shares at avg. $180.71$1.8M
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
May 27, 2026
Tax Payment(F)
Direct
242 shares at avg. $156.73$38K
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
May 26, 2026
Tax Payment(F)
Direct
376 shares at avg. $160.30$60K
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Mar 4, 2026
Gift(G)
Indirect
328 shares-
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Jan 30, 2026
Award(A)
Direct
9.5K shares-
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Jan 30, 2026
Tax Payment(F)
Direct
3.1K shares at avg. $211.68$648K
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
May 31, 2025
Tax Payment(F)
Direct
283 shares at avg. $135.63$38K
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
May 30, 2025
Award(A)
Direct
12.2K shares at avg. $135.63$1.7M
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
May 28, 2025
Tax Payment(F)
Direct
117 shares at avg. $138.65$16K
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
May 27, 2025
Tax Payment(F)
Direct
242 shares at avg. $136.73$33K
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
May 26, 2025
Tax Payment(F)
Direct
281 shares at avg. $136.73$38K
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Feb 25, 2025
Gift(G)
Direct
430 shares-
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Feb 20, 2025
Purchase(P)
Direct
1.5K shares at avg. $164.63$249K
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Jan 31, 2025
Tax Payment(F)
Direct
1K shares at avg. $165.57$170K
CRL
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Jan 31, 2025
Award(A)
Direct
4.1K shares-

		Type	Shares	Price		Ownership
Aug 19, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Gift(G)	528	-	$0	Direct
Aug 11, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Exercise(M)	6,500	$179.66	$1,167,790	Direct
Aug 11, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Sale(S)	6,500	$279.90	$1,819,350	Direct
Jun 5, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Gift(G)	3,386	-	$0	Indirect
Jun 5, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Gift(G)	3,386	-	$0	Direct
May 31, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Tax Payment(F)	378	$180.71	$68,308	Direct
May 30, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Tax Payment(F)	1,204	$180.71	$217,575	Direct
May 29, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Award(A)	9,961	$180.71	$1,800,052	Direct
May 27, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Tax Payment(F)	242	$156.73	$37,929	Direct
May 26, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Tax Payment(F)	376	$160.30	$60,273	Direct
Mar 4, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Gift(G)	328	-	$0	Indirect
Jan 30, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Award(A)	9,500	-	$0	Direct
Jan 30, 2026	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Tax Payment(F)	3,061	$211.68	$647,952	Direct
May 31, 2025	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Tax Payment(F)	283	$135.63	$38,383	Direct
May 30, 2025	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Award(A)	12,239	$135.63	$1,659,976	Direct
May 28, 2025	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Tax Payment(F)	117	$138.65	$16,222	Direct
May 27, 2025	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Tax Payment(F)	242	$136.73	$33,089	Direct
May 26, 2025	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Tax Payment(F)	281	$136.73	$38,421	Direct
Feb 25, 2025	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Gift(G)	430	-	-	Direct
Feb 20, 2025	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Purchase(P)	1,514	$164.63	$249,250	Direct
Jan 31, 2025	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Tax Payment(F)	1,025	$165.57	$169,709	Direct
Jan 31, 2025	CRL CHARLES RIVER LABORATORIES INTERNATIONAL, INC.	Award(A)	4,057	-	-	Direct

1-22 of 22 transactions

About Girshick Birgit

Girshick Birgit (SEC CIK 0001732091) files insider reports with the SEC as Chief Executive Officer of CHARLES RIVER LABORATORIES INTERNATIONAL, INC. (CRL).

Signal8 holds 12 ownership filings by Girshick Birgit, all Form 4s, filed between Feb 3, 2025 and Aug 20, 2026. Those filings report 22 transactions, from Jan 31, 2025 to Aug 19, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Girshick Birgit's filings is in WILMINGTON, MA.

Recent filings by Girshick Birgit

Aug 19, 2026: Gift of CRL shares (Form 4, code G).
Aug 11, 2026: Option exercise of CRL shares (Form 4, code M).
Aug 11, 2026: Open-market sale of CRL shares (Form 4, code S).
Jun 5, 2026: Gifts of CRL shares (2 lines, Form 4, code G).
May 31, 2026: Tax withholding of CRL shares (Form 4, code F).

Other insiders filing for CHARLES RIVER LABORATORIES INTERNATIONAL, INC. (CRL)

FOSTER JAMES C, Director
Parisotto Shannon M, CEVP, Disc & Safety Assessment
Coleman Glenn, EVP & Chief Financial Officer
Andrews Nancy C, Director
LaPlume Joseph W, EVP, Corp Strategy & Develop
Knell Michael Gunnar, SVP, Finance and CAO

How to read Form 4 transaction codes