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MESA LABORATORIES INC /CO/

MLAB Net selling
CIK 0000724004 #2870 in the set updated 17 Sep 2026
Bought (120 mo)
$1.45M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$70.18M
$1.47M on a plan · $33.09M straight out of an exercise
Sold at will
$35.62M
102 of 189 sales
Net
−$68.72M
−$34.17M against sales at will

By person

22 insiders · 252 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Sullivan John James
Director
—
$19.35M (29) scheduled
−$19.35M
95,398
1.70%
$10.85M
+15.9%
GUILLEMIN EVAN
Director
—
$10.45M (19)
−$10.45M
200,512
3.58%
$22.80M
−41.4%
Dwyer Robert V
Director
—
$8.49M (14)
−$8.49M
36,074
0.6447%
$4.10M
−52.8%
Sakys John
CFO
—
$8.32M (34) scheduled
−$8.32M
19,785
0.3536%
$2.25M
+1,086%
Owens Gary M
President and CEO
—
$6.57M (12)
−$6.57M
64,135
1.15%
$7.29M
+3,414%
Schmieder John Bradley
Director
—
$5.13M (16)
−$5.13M
82,120
1.47%
$9.34M
−1.7%
CAMPBELL H STUART
Director
—
$2.81M (13)
−$2.81M
41,677
0.7448%
$4.74M
−33.8%
KELLY DAVID M
Director
—
$2.64M (16) scheduled
−$2.64M
2,600
0.0465%
$295.59K
−55.6%
Archbold Brian David
SVP Operations
—
$2.37M (17) scheduled
−$2.37M
6,377
0.1140%
$725.00K
+1,957%
Adriance Glenn E
CSMO
—
$2.08M (5)
−$2.08M
10,000
0.1787%
$1.14M
−52.4%
DINOIA GREGORY
SVP Commercial
—
$1.08M (9)
−$1.08M
3,634
0.0649%
$413.15K
+159.6%
Kadia Siddhartha
President and CEO
$800.09K (1)
—
+$800.09K
7,093
0.1268%
$806.40K
—
BROOKS MICHAEL T
Director
—
$773.43K (2)
−$773.43K
32,730
0.5849%
$3.72M
+27.7%
Tripeny R Tony
Director
$302.26K (3)
—
+$302.26K
9,082
0.1623%
$1.03M
—
Ladiwala Shiraz Shabanali
Director
$252.81K (1)
—
+$252.81K
12,333
0.2204%
$1.40M
—
Capone Mark Christopher
Director
$99.33K (1)
—
+$99.33K
6,213
0.1110%
$706.36K
—
Crennen Lyndsey Elizabeth
CAO
—
$51.51K (2)
−$51.51K
2,020
0.0361%
$229.65K
+27.0%
Hall Shannon
Director
—
$40.24K (1)
−$40.24K
6,973
0.1246%
$792.76K
—
MESA LABORATORIES INC /CO/ entity
Director
—
—
—
29,788
0.5323%
$3.39M
+0.1%
Alltoft Jennifer Sadie
Director
—
—
—
7,662
0.1369%
$871.09K
—
Perez David Brian
Director
—
—
—
275
0.0049%
$31.26K
—
SEG Ventures, LLC entity
Director
—
—
—
0
0.0000%
$0.00
−100.0%

Individual transactions

57
Insider
Date
Role
Action
Shares
Price
Amount
Sakys John
18 Jun 2026
CFO
Exercised, kept
2,756
$95.10
$262.10K
Sakys John
18 Jun 2026
CFO
Exercised, kept
1,036
$95.10
$98.52K
Archbold Brian David
18 Jun 2026
SVP Operations
Exercised, kept
2,480
$95.10
$235.85K
Archbold Brian David
18 Jun 2026
SVP Operations
Exercised, kept
844
$95.10
$80.26K
Crennen Lyndsey Elizabeth
18 Jun 2026
CAO
Exercised, kept
368
$95.10
$35.00K
Crennen Lyndsey Elizabeth
18 Jun 2026
CAO
Exercised, kept
233
$95.10
$22.16K
Crennen Lyndsey Elizabeth
18 Jun 2026
CAO
Exercised, kept
125
$95.10
$11.89K
Sakys John
15 Jun 2026
CFO
Exercised, kept
2,717
$104.08
$282.79K
Archbold Brian David
15 Jun 2026
SVP Operations
Exercised, kept
2,454
$104.08
$255.41K
Owens Gary M
21 Jun 2025
President and CEO
Exercised, kept
3,301
$95.82
$316.30K
Archbold Brian David
21 Jun 2025
SVP Operations
Exercised, kept
844
$95.82
$80.87K
Sakys John
21 Jun 2025
CFO
Exercised, kept
1,036
$95.82
$99.27K
Sakys John
18 Jun 2025
CFO
Exercised, kept
2,840
$92.99
$264.09K
Archbold Brian David
18 Jun 2025
SVP Operations
Exercised, kept
2,556
$92.99
$237.68K
Owens Gary M
18 Jun 2025
President and CEO
Exercised, kept
8,707
$92.99
$809.66K
Sullivan John James
5 Jul 2022
Director
Exercised, kept
15,000
$122.66
$1.84M
Sullivan John James
5 Jul 2022
Director
Exercised, kept
3,576
$70.56
$252.32K
Sullivan John James
9 Jun 2022
Director
Exercised, kept
1,001
$70.56
$70.63K
Sullivan John James
17 Feb 2022
Director
Exercised, kept
1,000
$70.56
$70.56K
Sullivan John James
17 Nov 2021
Director
Exercised, kept
1,000
$70.56
$70.56K
Sullivan John James
18 Aug 2021
Director
Exercised, kept
1,000
$70.56
$70.56K
Sullivan John James
10 Jun 2021
Director
Exercised, kept
286
$70.56
$20.18K
Sullivan John James
10 Jun 2021
Director
Exercised, kept
400
$70.56
$28.22K
Sullivan John James
10 Jun 2021
Director
Exercised, kept
315
$89.70
$28.26K
Archbold Brian David
11 Mar 2021
SVP Continuous Improvement
Exercised, kept
145
$129.10
$18.72K
Sakys John
8 Jan 2021
CFO
Exercised, kept
1,000
$89.70
$89.70K
Dwyer Robert V
3 Apr 2020
Director
Exercised, kept
189
$70.56
$13.34K
Dwyer Robert V
3 Apr 2020
Director
Exercised, kept
17
$58.51
$994.67
Dwyer Robert V
3 Apr 2020
Director
Exercised, kept
172
$89.70
$15.43K
Dwyer Robert V
3 Apr 2020
Director
Exercised, kept
90
$142.40
$12.82K
Dwyer Robert V
3 Apr 2020
Director
Exercised, kept
200
$122.66
$24.53K
Dwyer Robert V
3 Apr 2020
Director
Exercised, kept
200
$97.78
$19.56K
Sakys John
3 Sep 2019
CFO
Exercised, kept
1,000
$48.72
$48.72K
Dwyer Robert V
18 Jun 2019
Director
Exercised, kept
750
$51.85
$38.89K
Dwyer Robert V
18 Jun 2019
Director
Exercised, kept
500
$50.50
$25.25K
Dwyer Robert V
18 Jun 2019
Director
Exercised, kept
250
$29.20
$7.30K
Dwyer Robert V
18 Jun 2019
Director
Exercised, kept
68
$58.51
$3.98K
Dwyer Robert V
18 Jun 2019
Director
Exercised, kept
856
$89.70
$76.78K
Dwyer Robert V
18 Jun 2019
Director
Exercised, kept
600
$97.78
$58.67K
Dwyer Robert V
18 Jun 2019
Director
Exercised, kept
753
$70.56
$53.13K
Dwyer Robert V
18 Jun 2019
Director
Exercised, kept
90
$142.40
$12.82K
Dwyer Robert V
18 Jun 2019
Director
Exercised, kept
400
$122.66
$49.06K
BROOKS MICHAEL T
17 Apr 2019
Director
Exercised, kept
90
$142.40
$12.82K
BROOKS MICHAEL T
16 Apr 2019
Director
Exercised, kept
68
$58.51
$3.98K
BROOKS MICHAEL T
16 Apr 2019
Director
Exercised, kept
856
$89.70
$76.78K
BROOKS MICHAEL T
16 Apr 2019
Director
Exercised, kept
1,000
$51.85
$51.85K
BROOKS MICHAEL T
16 Apr 2019
Director
Exercised, kept
1,000
$50.50
$50.50K
BROOKS MICHAEL T
16 Apr 2019
Director
Exercised, kept
1,000
$29.20
$29.20K
BROOKS MICHAEL T
16 Apr 2019
Director
Exercised, kept
600
$97.78
$58.67K
BROOKS MICHAEL T
16 Apr 2019
Director
Exercised, kept
753
$70.56
$53.13K
BROOKS MICHAEL T
16 Apr 2019
Director
Exercised, kept
400
$122.66
$49.06K
BROOKS MICHAEL T
19 Mar 2019
Director
Exercised, kept
2,000
$25.56
$51.12K
BROOKS MICHAEL T
19 Mar 2019
Director
Exercised, kept
2,400
$16.60
$39.84K
Sakys John
31 Jul 2018
CFO
Exercised, kept
500
$48.72
$24.36K
BROOKS MICHAEL T
16 Mar 2018
Director
Exercised, kept
1,800
$21.93
$39.47K
Sakys John
20 Jun 2017
CFO
Exercised, kept
1,000
$48.72
$48.72K
Sullivan John James
10 May 2017
President and CEO
Exercised, kept
9,000
$18.98
$170.82K
Showing 250 of 252 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 414
Amendments (4/A) skipped 14
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 8
Sales straight out of an exercise 79
Sales at will 102
Transactions with no price 0
Shares from compensation/vesting 835,842
Sales filed before the plan box existed 93
History held since 12 Oct 2016