Insider sale notice: Rostislav Raykov to sell 9,747 shares (FENC)

Rhea-AI Filing Summary

Rostislav Raykov reports a proposed sale of 9,747 shares of Common Stock via a stock option exercise dated 06/01/2026. The filing lists prior open-market dispositions in the three months ended May 2026: 10,079 shares on 03/02/2026, 10,946 shares on 04/01/2026, and 10,781 shares on 05/01/2026, with the corresponding proceeds shown in the excerpt. The sale method is noted as cash.

Insights

Securities Attorney

Form 144 notifies the SEC of an intended resale under Rule 144 by a reporting person.

Form 144 is a notice of an intended resale of restricted or control securities; the excerpt shows a stock option exercise as the source and lists 9,747 shares to be sold on 06/01/2026. The filing also records prior dispositions in March–May 2026 with exact share counts and proceeds.

Volume here appears routine; cash proceeds and sale dates are provided in the excerpt. Disclosure of precise settlement method (Cash) and prior three-month sales satisfies common Rule 144 reporting elements. Subsequent filings or broker reports would show completion.

Key Figures

Proposed shares to be sold: 9,747 shares Disposition - 05/01/2026: 10,781 shares Disposition - 04/01/2026: 10,946 shares +2 more

5 metrics

Proposed shares to be sold 9,747 shares Stock option exercise dated 06/01/2026

Disposition - 05/01/2026 10,781 shares Sale reported on 05/01/2026 with proceeds $69,761.69

Disposition - 04/01/2026 10,946 shares Sale reported on 04/01/2026 with proceeds $69,072.54

Disposition - 03/02/2026 10,079 shares Sale reported on 03/02/2026 with proceeds $84,354.17

Broker / Dealer Morgan Stanley Smith Barney LLC Listed intermediary in excerpt

Key Terms

Form 144, Stock Option Exercise, Issuer, Securities To Be Sold

4 terms

Form 144 regulatory

"144: Securities To Be Sold | Common | 06/01/2026 | Stock Option Exercise"

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.

Stock Option Exercise financial

"144: Securities To Be Sold | Common | 06/01/2026 | Stock Option Exercise"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

Issuer regulatory

"144: Securities To Be Sold | ... | ISSUER | ..."

Securities To Be Sold regulatory

"144: Securities To Be Sold | Common | 06/01/2026 | Stock Option Exercise"

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Available on EDGAR 06/01/2026 - 04:14 PM Accepted by SEC EDGAR 06/01/2026 - 04:14 PM Learn about SEC filing dates

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

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	9747	93813.90	34737030	06/01/2026	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	06/01/2026	Stock Option Exercise	ISSUER			9747	06/01/2026	Cash

* 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
ROSTISLAV RAYKOV PO BOX 13628, 68 TW ALEXANDER DRIVE Research Triangle Park NC 27709	Common	05/01/2026	10781	69761.69
ROSTISLAV RAYKOV PO BOX 13628, 68 TW ALEXANDER DRIVE Research Triangle Park NC 27709	Common	04/01/2026	10946	69072.54
ROSTISLAV RAYKOV PO BOX 13628, 68 TW ALEXANDER DRIVE Research Triangle Park NC 27709	Common	03/02/2026	10079	84354.17

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 the Form 144 for FENC indicate about the transaction?

It indicates a proposed resale of 9,747 shares of Common Stock via a stock option exercise dated 06/01/2026. The filing lists the sale method as cash and includes prior three-month dispositions.

Who is the reporting person in the Form 144 for FENC?

The reporting person is Rostislav Raykov, whose name and address appear on the excerpt. The filing lists his proposed sale and shows prior sales during March–May 2026.

What prior sales are disclosed in the three months before the Form 144?

The excerpt shows prior dispositions of 10,079 shares on 03/02/2026, 10,946 shares on 04/01/2026, and 10,781 shares on 05/01/2026, each with the proceeds displayed beside the entries.

How was the proposed sale to be settled according to the filing?

The filing states the sale method as Cash, indicating the shares tied to a stock option exercise were intended to be sold for cash consideration on 06/01/2026.