John James Sullivan

CIK: 0001305784

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)1 (11.1%)

Position reduction

Option Exercises (M)3 (33.3%)

Derivative conversions

Awards (A)2 (22.2%)

Compensation grants

Other (G, F, J, C, D, …)3 (33.3%)

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

Companies & Roles (1)

MLAB

MESA LABORATORIES INC /CO/

Director

Discretionary Trading P&L

Holdings

Transaction History (9 total)

MLAB
MESA LABORATORIES INC /CO/
Oct 13, 2026
Gift(G)
Direct
1.2K shares-
MLAB
MESA LABORATORIES INC /CO/
Sep 9, 2026
Award(A)
Restricted Stock Units - 11
Direct
1.8K shares-
MLAB
MESA LABORATORIES INC /CO/
Aug 15, 2026
Exercise(M)
Direct
2.8K shares-
MLAB
MESA LABORATORIES INC /CO/
Aug 13, 2026
Sale(S)
Direct
7.1K shares at avg. $112.80$800K
MLAB
MESA LABORATORIES INC /CO/
Dec 2, 2025
Gift(G)
Direct
2K shares-
MLAB
MESA LABORATORIES INC /CO/
Aug 15, 2025
Award(A)
Restricted Stock Units - 10
Direct
2.8K shares-
MLAB
MESA LABORATORIES INC /CO/
Aug 15, 2025
Exercise(M)
Direct
1.4K shares-
MLAB
MESA LABORATORIES INC /CO/
Nov 19, 2024
Gift(G)
Direct
2K shares-
MLAB
MESA LABORATORIES INC /CO/
Sep 1, 2024
Exercise(M)
Direct
1.1K shares-

		Type	Shares	Price		Ownership
Oct 13, 2026	MLAB MESA LABORATORIES INC /CO/	Gift(G)	1,200	-	$0	Direct
Sep 9, 2026	MLAB MESA LABORATORIES INC /CO/	Award(A) Restricted Stock Units - 11	1,774	-	-	Direct
Aug 15, 2026	MLAB MESA LABORATORIES INC /CO/	Exercise(M)	2,784	-	$0	Direct
Aug 13, 2026	MLAB MESA LABORATORIES INC /CO/	Sale(S)	7,093	$112.80	$800,090	Direct
Dec 2, 2025	MLAB MESA LABORATORIES INC /CO/	Gift(G)	2,000	-	-	Direct
Aug 15, 2025	MLAB MESA LABORATORIES INC /CO/	Award(A) Restricted Stock Units - 10	2,784	-	-	Direct
Aug 15, 2025	MLAB MESA LABORATORIES INC /CO/	Exercise(M)	1,404	-	-	Direct
Nov 19, 2024	MLAB MESA LABORATORIES INC /CO/	Gift(G)	2,000	-	$0	Direct
Sep 1, 2024	MLAB MESA LABORATORIES INC /CO/	Exercise(M)	1,074	-	$0	Direct

1-9 of 9 transactions

About Sullivan John James

Sullivan John James (SEC CIK 0001305784) files insider reports with the SEC as Director of MESA LABORATORIES INC /CO/ (MLAB).

Signal8 holds 8 ownership filings by Sullivan John James, all Form 4s, filed between Sep 6, 2024 and Oct 29, 2026. Those filings report 9 transactions, from Sep 1, 2024 to Oct 13, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Sullivan John James's filings is in LAKEWOOD, CO.

Recent filings by Sullivan John James

Oct 13, 2026: Gift of MLAB shares (Form 4, code G).
Sep 9, 2026: Grant or award of MLAB derivative securities (Form 4, code A).
Aug 15, 2026: Option exercise of MLAB shares (Form 4, code M).
Aug 13, 2026: Open-market sale of MLAB shares (Form 4, code S).
Dec 2, 2025: Gift of MLAB shares (Form 4, code G).

Other insiders filing for MESA LABORATORIES INC /CO/ (MLAB)

How to read Form 4 transaction codes