Insider · CIK 0001991396
Philippe Busque
officer
Files at CTKB (Cytek Biosciences, Inc.). First filing -, latest -.
In brief
Philippe Busque files SEC Form 4 as officer at CTKB (Cytek Biosciences, Inc.). 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; Philippe Busque has 0, so none is measured yet.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 0
$0 bought, $0 sold
Signals
This insider’s open-market buys and sells, scored.
No scored open-market trades yet.
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 2, 2026 | CTKB CYTEK BIOSCIENCES, INC. | 31,666 0.02% of outstanding | $147k | Sep 2, 2026 | none |
Transactions
The newest 50 of 64 rows this insider has filed.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +1,024 | - | - | 36,711 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -263 | $3.55 | $934 | 36,448 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +1,473 | - | - | 37,921 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -378 | $3.55 | $1,342 | 37,543 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,416 | - | - | 39,959 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -620 | $3.55 | $2,201 | 39,339 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +5,551 | - | - | 44,890 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -1,424 | $3.55 | $5,055 | 43,466 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -1,024 | $0.00 | $0 | 5,641 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -1,473 | $0.00 | $0 | 16,209 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,416 | $0.00 | $0 | 41,089 | May 20, 2026 |
| May 18, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -5,551 | $0.00 | $0 | 127,675 | May 20, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,049 | - | - | 30,951 | Mar 12, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -635 | $4.23 | $2,686 | 30,316 | Mar 12, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,946 | - | - | 33,262 | Mar 12, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -912 | $4.23 | $3,858 | 32,350 | Mar 12, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +4,833 | - | - | 37,183 | Mar 12, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -1,496 | $4.23 | $6,328 | 35,687 | Mar 12, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | AGrant or award Employee Stock Option (right to buy)derivative | +70,665 | $0.00 | $0 | 70,665 | Mar 12, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | AGrant or award Restricted Stock Unitsderivative | +133,226 | $0.00 | $0 | 133,226 | Mar 12, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,049 | $0.00 | $0 | 6,665 | Mar 12, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,946 | $0.00 | $0 | 17,682 | Mar 12, 2026 |
| Mar 10, 2026 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -4,833 | $0.00 | $0 | 43,505 | Mar 12, 2026 |
| Nov 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +1,536 | - | - | 24,952 | Nov 20, 2025 |
| Nov 18, 2025 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -393 | $5.53 | $2,173 | 24,559 | Nov 20, 2025 |
| Nov 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,210 | - | - | 26,769 | Nov 20, 2025 |
| Nov 18, 2025 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -565 | $5.53 | $3,124 | 26,204 | Nov 20, 2025 |
| Nov 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +3,625 | - | - | 29,829 | Nov 20, 2025 |
| Nov 18, 2025 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -927 | $5.53 | $5,126 | 28,902 | Nov 20, 2025 |
| Nov 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -1,536 | $0.00 | $0 | 8,714 | Nov 20, 2025 |
| Nov 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,210 | $0.00 | $0 | 20,628 | Nov 20, 2025 |
| Nov 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -3,625 | $0.00 | $0 | 48,338 | Nov 20, 2025 |
| Aug 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +1,536 | - | - | 20,453 | Aug 20, 2025 |
| Aug 18, 2025 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -599 | $4.06 | $2,432 | 19,854 | Aug 20, 2025 |
| Aug 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,210 | - | - | 22,064 | Aug 20, 2025 |
| Aug 18, 2025 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -861 | $4.06 | $3,496 | 21,203 | Aug 20, 2025 |
| Aug 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +3,625 | - | - | 24,828 | Aug 20, 2025 |
| Aug 18, 2025 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -1,412 | $4.06 | $5,733 | 23,416 | Aug 20, 2025 |
| Aug 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -1,536 | $0.00 | $0 | 10,250 | Aug 20, 2025 |
| Aug 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,210 | $0.00 | $0 | 22,838 | Aug 20, 2025 |
| Aug 18, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -3,625 | $0.00 | $0 | 51,963 | Aug 20, 2025 |
| May 19, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +1,024 | - | - | 16,943 | May 21, 2025 |
| May 19, 2025 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -399 | $2.69 | $1,073 | 16,544 | May 21, 2025 |
| May 19, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +1,473 | - | - | 18,017 | May 21, 2025 |
| May 19, 2025 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -574 | $2.69 | $1,544 | 17,443 | May 21, 2025 |
| May 19, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Common Stock | +2,416 | - | - | 19,859 | May 21, 2025 |
| May 19, 2025 | CTKB Cytek Biosciences, Inc. | FTax withholding Common Stock | -942 | $2.69 | $2,534 | 18,917 | May 21, 2025 |
| May 19, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -1,024 | $0.00 | $0 | 11,786 | May 21, 2025 |
| May 19, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -1,473 | $0.00 | $0 | 25,048 | May 21, 2025 |
| May 19, 2025 | CTKB Cytek Biosciences, Inc. | MOption exercise Restricted Stock Unitsderivative | -2,416 | $0.00 | $0 | 55,588 | May 21, 2025 |
50 of 64 rows shown.
Questions about Philippe Busque
Answered from the filings on this page, as of the latest one.
Is Philippe Busque buying or selling?
Philippe Busque has no open-market buy or sell on SEC Form 4; the filings on record are grants, exercises and other transactions.
How did Philippe Busque's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Philippe Busque has 0.
Where does Philippe Busque file Form 4?
Philippe Busque has filed Form 4 at CTKB (Cytek Biosciences, Inc.) as SVP, GLOBAL SALES AND SERVICES. 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.