Insider · CIK 0001515140
Michael Holder
Files at CTKB (Cytek Biosciences, Inc.), MDXH (MDxHealth SA). First filing -, latest -.
In brief
Michael Holder files SEC Form 4 as director at CTKB (Cytek Biosciences, Inc.), and also at MDXH (MDxHealth SA). No open-market trade is on file; the transactions below are grants, exercises and other rows that carry no view on the price.
A track record needs three past buys with six months of prices behind them; Michael Holder has 0, so none is measured yet.
Signals
This insider’s open-market buys and sells, scored.
Transactions
Every row this insider has filed, 23 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,181 | - | - | 62,875 | Aug 20, 2026 |
| Aug 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,181 | $0.00 | $0 | 7,276 | Aug 20, 2026 |
| Jun 10, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +43,973 | - | - | 60,694 | Jun 12, 2026 |
| Jun 10, 2026 | CTKB Cytek Biosciences, Inc. | AGrant or award Restricted Stock Unitsderivative | +33,333 | $0.00 | $0 | 33,333 | Jun 12, 2026 |
| Jun 10, 2026 | CTKB Cytek Biosciences, Inc. | AGrant or award Director Stock Option (right to buy)derivative | +18,261 | $0.00 | $0 | 18,261 | Jun 12, 2026 |
| Jun 10, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -43,973 | $0.00 | $0 | 0 | Jun 12, 2026 |
| Jun 1, 2026 | MDXH MDxHealth SA | AGrant or award Share Optionderivative | +10,000 | $0.00 | $0 | 10,000 | Jun 3, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +1,454 | - | - | 16,721 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -1,454 | $0.00 | $0 | 9,457 | May 20, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,908 | - | - | 15,267 | Mar 12, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,908 | $0.00 | $0 | 10,911 | Mar 12, 2026 |
| Nov 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,181 | - | - | 12,359 | Nov 20, 2025 |
| Nov 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,181 | $0.00 | $0 | 13,819 | Nov 20, 2025 |
| Aug 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,181 | $0.00 | $0 | 10,178 | Aug 20, 2025 |
| Aug 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,181 | $0.00 | $0 | 16,000 | Aug 20, 2025 |
| Jun 18, 2025 | CTKB Cytek Biosciences, Inc. | AGrant or award Restricted Stock Unitsderivative | +43,973 | $0.00 | $0 | 43,973 | Jun 20, 2025 |
| Jun 18, 2025 | CTKB Cytek Biosciences, Inc. | AGrant or award Director Stock Option (right to buy)derivative | +23,809 | $0.00 | $0 | 23,809 | Jun 20, 2025 |
| May 19, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +1,454 | - | - | 7,997 | May 21, 2025 |
| May 19, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -1,454 | $0.00 | $0 | 18,181 | May 21, 2025 |
| Mar 10, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,908 | - | - | 6,543 | Mar 12, 2025 |
| Mar 10, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,908 | $0.00 | $0 | 19,635 | Mar 12, 2025 |
| Nov 18, 2024 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,181 | - | - | 3,635 | Nov 20, 2024 |
| Nov 18, 2024 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,181 | $0.00 | $0 | 22,543 | Nov 20, 2024 |
Questions about Michael Holder
Answered from the filings on this page, as of the latest one.
Is Michael Holder buying or selling?
Michael Holder has no open-market buy or sell on SEC Form 4; the filings on record are grants, exercises and other transactions.
How did Michael Holder's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Michael Holder has 0.
Where does Michael Holder file Form 4?
Michael Holder has filed Form 4 at CTKB (Cytek Biosciences, Inc.); MDXH (MDxHealth SA). 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.