Insider sale: Cytek (NASDAQ: CYTK) files to sell 45,000 RSUs

Rhea-AI Filing Summary

Insider Robert Blum reported planned and recent disposals of Cytek Biosciences common stock via Form 144. The filing lists 45,000 Restricted Stock Units to be sold and shows two reported disposals in the past three months: 36,601 shares for $2,274,752.15 and 7,931 shares for $481,570.32. The cover lists an aggregate value of $2,965,950.00 and a figure of 123,162,807 shown alongside the 04/01/2026 date.

Insights

Corporate Governance Analyst

Form 144 shows an insider disposition of equity through RSUs and recent open-market sales.

The filing lists 45,000 Restricted Stock Units as the securities to be sold and records two recent disposals: 36,601 shares and 7,931 shares, with aggregate reported proceeds in the filing.

These entries are routine disclosures of planned and completed sales under Rule 144; cash‑flow treatment and whether sales were part of a prearranged plan are not stated in the excerpt. Subsequent SEC filings or broker disclosures would provide execution details.

Key Figures

RSUs to be sold: 45,000 shares Recent sale 1: 36,601 shares Recent sale 2: 7,931 shares +2 more

5 metrics

RSUs to be sold 45,000 shares listed as securities to be sold (03/06/2024)

Recent sale 1 36,601 shares sold 03/17/2026 for $2,274,752.15

Recent sale 2 7,931 shares sold 03/09/2026 for $481,570.32

Aggregate value on cover line $2,965,950.00 listed alongside 45,000 and 04/01/2026

Figure shown 123,162,807 appears on cover with date 04/01/2026

Key Terms

Restricted Stock Units, Form 144, Securities Sold During The Past 3 Months

3 terms

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 45000 | 03/06/2024"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Securities Sold During The Past 3 Months regulatory

"Securities Sold During The Past 3 Months | ROBERT BLUM ... 03/17/2026"

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	45000	2965950.00	123162807	04/01/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/06/2024	Restricted Stock Units	Issuer			45000	03/06/2024	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
ROBERT BLUM 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	03/17/2026	36601	2274752.15
ROBERT BLUM 350 OYSTER POINT BOULEVARD SOUTH SAN FRANCISCO CA 94080	Common	03/09/2026	7931	481570.32

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does CYTK's Form 144 filed by Robert Blum disclose?

It discloses planned and recent insider sales totaling 45,000 RSUs and two recent disposals. The filing lists 45,000 Restricted Stock Units to be sold and shows sales of 36,601 and 7,931 shares with the reported proceeds shown.

How many shares did Robert Blum sell in the past three months on CYTK?

He reported sales of 36,601 and 7,931 shares. The filing records proceeds of $2,274,752.15 for 36,601 shares and $481,570.32 for 7,931 shares in the excerpt provided.

What security type is being sold according to the CYTK Form 144?

The filing identifies the securities as Restricted Stock Units (RSUs) settled into common stock. The cover line lists 45,000 Restricted Stock Units dated 03/06/2024 in the excerpt.

Does the Form 144 state how proceeds will be used or who receives them?

The excerpt does not specify use of proceeds or the recipient beyond the reporting person. The filing shows reported sale proceeds amounts but does not describe allocation or company receipt in the provided text.