Insider · CIK 0001305784
John James Sullivan
Files at MLAB (MESA LABORATORIES INC /CO/). First filing Aug 17, 2026, latest Aug 17, 2026.
In brief
John James Sullivan files SEC Form 4 as director at MLAB (MESA LABORATORIES INC /CO/). Since Aug 17, 2026, John James Sullivan has reported 0 open-market buys worth $0 and 1 open-market sell worth $800k, the latest filed on Aug 17, 2026.
A track record needs three past buys with six months of prices behind them; John James Sullivan has 0, so none is measured yet.
The newest scored trade: sold $800k of MLAB on Aug 13, 2026, filed Aug 17, 2026, scored 47 (moderate). In the last 12 months: 0 buys worth $0 and 1 sell worth $800k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
MLAB: MESA LABORATORIES INC /CO/
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 47Moderate | MLABsell MESA LABORATORIES INC /CO/ | $800k 7,093 shares | -28% | +91% from low0% from high |
Transactions
Every row this insider has filed, 12 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 9, 2026 | MLAB MESA LABORATORIES INC /CO/ | AGrant or award Restricted Stock Units - 11derivative | +1,774 | $0.00 | $0 | 1,774 | 32 d ago |
| Aug 15, 2026 | MLAB MESA LABORATORIES INC /CO/ | MOption exercise Common Stock | +2,784 | $0.00 | $0 | 20,618 | Aug 17, 2026 |
| Aug 13, 2026 | MLAB MESA LABORATORIES INC /CO/ | SOpen-market sale Common Stock | -7,093 | $112.80 | $800k | 17,834 | Aug 17, 2026 |
| Aug 15, 2026 | MLAB MESA LABORATORIES INC /CO/ | MOption exercise Restricted Stock Units - 10derivative | -2,784 | $0.00 | $0 | 0 | Aug 17, 2026 |
| Dec 2, 2025 | MLAB MESA LABORATORIES INC /CO/ | GGift Common Stock | -2,000 | $0.00 | $0 | 25,282 | Dec 5, 2025 |
| Aug 15, 2025 | MLAB MESA LABORATORIES INC /CO/ | MOption exercise Common Stock | +1,404 | $0.00 | $0 | 27,282 | Aug 18, 2025 |
| Aug 15, 2025 | MLAB MESA LABORATORIES INC /CO/ | MOption exercise Restricted Stock Units - 9derivative | -1,404 | $0.00 | $0 | 0 | Aug 18, 2025 |
| Aug 15, 2025 | MLAB MESA LABORATORIES INC /CO/ | AGrant or award Restricted Stock Units - 10derivative | +2,784 | $0.00 | $0 | 2,784 | Aug 18, 2025 |
| Nov 19, 2024 | MLAB MESA LABORATORIES INC /CO/ | GGift Common Stock | -2,000 | $0.00 | $0 | 25,878 | Nov 25, 2024 |
| Nov 9, 2023 | MLAB MESA LABORATORIES INC /CO/ | GGift Common Stock | -200 | $0.00 | $0 | 28,804 | Nov 14, 2023 |
| Nov 9, 2023 | MLAB MESA LABORATORIES INC /CO/ | GGift Common Stockindirect: By Trust | +200 | $0.00 | $0 | 44,780 | Nov 14, 2023 |
| Nov 9, 2023 | MLAB MESA LABORATORIES INC /CO/ | GGift Common Stock | -2,000 | $0.00 | $0 | 26,804 | Nov 14, 2023 |
Questions about John James Sullivan
Answered from the filings on this page, as of the latest one.
Is John James Sullivan buying or selling?
In the last 12 months John James Sullivan reported 0 open-market buys worth $0 and 1 open-market sell worth $800k on SEC Form 4; the latest was sold $800k of MLAB on Aug 13, 2026. Grants, option exercises and tax withholding are not counted.
How did John James Sullivan's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and John James Sullivan has 0.
Where does John James Sullivan file Form 4?
John James Sullivan has filed Form 4 at MLAB (MESA LABORATORIES INC /CO/). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.