Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

MESA LABORATORIES INC /CO/

MLAB · Nasdaq · CIK 0000724004 · Technology · Scientific & Technical Instruments

INSIDER SIGNAL

No active buy signal

2 qualifying P purchase groups
in the current 180-day scoring window

27 Form 4 transaction lines observed in the same window
7 sales · 18 option, withholding, award, gift or other lines

Last qualifying purchase2026-08-13 · Kadia Siddhartha · $800.1K

WHY NO ACTIVE SIGNAL?

Purchase activityPresent
Recent buying2 qualifying line group(s)
Recent salesModerate
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Archbold Brian DavidSVP Operations
○▼○○▼
Sakys JohnCFO
○▼○○▼
Crennen Lyndsey ElizabethCAO
▼○○▼
Tripeny R TonyDirector
●○
Sullivan John JamesDirector
▼○
Capone Mark ChristopherDirector
○
● Purchase▼ Sale○ Other

Showing the six most active owners; 4 additional owner(s) remain in Form 4 evidence.

Purchase breadth & concentration

QUALIFYING BUYERS2
PURCHASE CONCENTRATION89%Largest buyer: Kadia Siddhartha · $800.1K
CLUSTER BUYING · 15D2 insidersPeak activity: 2026-08-13–2026-08-13

Roles in the peak window: Director, President and CEO. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-08-13 · Kadia Siddhartha.

Recent Form 4 activity

5Purchases
7Sales
20Other Form 4 lines
22SEC filings · 365 days
BUYING2 qualifying P line(s) · 180 days
SELLING7 sale line(s) · context only
OTHER18 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
447,048
Previous report
403,559
Avg daily volume
120,938
Days to cover
3.7

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-13Tripeny R TonyPurchase (P)Common Stock900USD 113.69USD 102,321SEC filing ↗
2026-08-13Kadia SiddharthaPurchase (P)Common Stock7,093USD 112.80USD 800,090SEC filing ↗
2026-03-10Tripeny R TonyPurchase (P)Common Stock1,315USD 76.00USD 99,940SEC filing ↗
2026-03-10Ladiwala Shiraz ShabanaliPurchase (P)Common Stock3,500USD 72.23USD 252,805SEC filing ↗
2026-03-10Capone Mark ChristopherPurchase (P)Common Stock1,301USD 76.35USD 99,331SEC filing ↗
2022-08-09Tripeny R TonyPurchase (P)Common Stock500USD 200.00USD 100,000SEC filing ↗

Form 4 evidence

32 transaction lines in the latest 365-day window; 423 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-15Tripeny R TonyOption exercise / conversion (M)Common Stock2,784USD 0.00USD 0SEC filing ↗
2026-08-15Sullivan John JamesOption exercise / conversion (M)Common Stock2,784USD 0.00USD 0SEC filing ↗
2026-08-15Ladiwala Shiraz ShabanaliOption exercise / conversion (M)Common Stock3,810USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (28 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-15Tripeny R TonyOption exercise / conversion (M)Common Stock2,784USD 0.00USD 0SEC filing ↗
2026-08-15Sullivan John JamesOption exercise / conversion (M)Common Stock2,784USD 0.00USD 0SEC filing ↗
2026-08-15Ladiwala Shiraz ShabanaliOption exercise / conversion (M)Common Stock3,810USD 0.00USD 0SEC filing ↗
2026-08-15Hall ShannonOption exercise / conversion (M)Common Stock2,784USD 0.00USD 0SEC filing ↗
2026-08-15Capone Mark ChristopherOption exercise / conversion (M)Common Stock2,784USD 0.00USD 0SEC filing ↗
2026-08-15Alltoft Jennifer SadieOption exercise / conversion (M)Common Stock2,784USD 0.00USD 0SEC filing ↗
2026-08-13Tripeny R TonyPurchase (P)Common Stock900USD 113.69USD 102,321SEC filing ↗
2026-08-13Sullivan John JamesSale (S)Common Stock7,093USD 112.80USD 800,090SEC filing ↗
2026-08-13Kadia SiddharthaPurchase (P)Common Stock7,093USD 112.80USD 800,090SEC filing ↗
2026-06-22Sakys JohnSale (S)Common Stock2,827USD 89.50USD 253,016SEC filing ↗
2026-06-22Crennen Lyndsey ElizabethSale (S)Common Stock442USD 89.50USD 39,559SEC filing ↗
2026-06-22Archbold Brian DavidSale (S)Common Stock2,516USD 89.50USD 225,182SEC filing ↗
2026-06-18Sakys JohnOption exercise / conversion (M)Common Stock3,792USD 95.10USD 360,619SEC filing ↗
2026-06-18Sakys JohnAward / grant (A)Common Stock2,282USD 95.10USD 217,018SEC filing ↗
2026-06-18Crennen Lyndsey ElizabethOption exercise / conversion (M)Common Stock726USD 95.10USD 69,043SEC filing ↗
2026-06-18Crennen Lyndsey ElizabethAward / grant (A)Common Stock263USD 95.10USD 25,011SEC filing ↗
2026-06-18Archbold Brian DavidOption exercise / conversion (M)Common Stock3,324USD 95.10USD 316,112SEC filing ↗
2026-06-18Archbold Brian DavidAward / grant (A)Common Stock1,859USD 95.10USD 176,791SEC filing ↗
2026-06-16Sakys JohnSale (S)Common Stock1,223USD 101.27USD 123,853SEC filing ↗
2026-06-16Crennen Lyndsey ElizabethSale (S)Common Stock118USD 101.27USD 11,950SEC filing ↗
2026-06-16Archbold Brian DavidSale (S)Common Stock1,151USD 101.27USD 116,562SEC filing ↗
2026-06-15Sakys JohnOption exercise / conversion (M)Common Stock2,717USD 104.08USD 282,785SEC filing ↗
2026-06-15Archbold Brian DavidOption exercise / conversion (M)Common Stock2,454USD 104.08USD 255,412SEC filing ↗
2026-03-10Tripeny R TonyPurchase (P)Common Stock1,315USD 76.00USD 99,940SEC filing ↗
2026-03-10Ladiwala Shiraz ShabanaliPurchase (P)Common Stock3,500USD 72.23USD 252,805SEC filing ↗
2026-03-10Capone Mark ChristopherPurchase (P)Common Stock1,301USD 76.35USD 99,331SEC filing ↗
2025-12-02Sullivan John JamesGift (G)Common Stock2,000USD 0.00USD 0SEC filing ↗
2025-10-27Owens Gary MOption exercise / conversion (M)Common Stock11,558USD 0.00USD 0SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerMLAB
CIK0000724004
SectorTechnology
IndustryScientific & Technical Instruments Yahoo Finance
SEC SIC3823 Industrial Instruments For Measurement, Display, and Control
ExchangeNasdaq

Data coverage

Local Form 4 history423 transaction lines from 2020-02-11 to 2026-08-15
6 P purchase lines · 135 S sale lines · 282 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.