Richardson Electronics (RELL) insider files to sell 38,993 common shares

Rhea-AI Filing Summary

Richardson Electronics insider Wendy S. Diddell filed a notice of proposed sales of company common stock. The filing covers up to 38,993 common shares held at Fidelity Brokerage Services LLC, with an aggregate market value of $811,834.00, and lists Richardson Electronics’ common shares as 12,520,251 outstanding. The planned sales are targeted around August 8, 2026 on NASDAQ. The shares derive from prior stock awards (3,991 and 3,602 shares) and stock option exercises (4,000; 16,000; 12,000 shares). Over the past three months, Diddell has already sold 23,901 shares for $477,975.88 on August 4, 2026.

Key Figures

Shares to be sold: 38,993 shares Aggregate market value of proposed sale: $811,834.00 Shares outstanding: 12,520,251 shares +4 more

7 metrics

Shares to be sold 38,993 shares Proposed sale of Richardson Electronics common stock

Aggregate market value of proposed sale $811,834.00 Estimated value of 38,993 shares to be sold

Shares outstanding 12,520,251 shares Richardson Electronics common shares outstanding

Recent shares sold 23,901 shares Shares sold by Wendy S. Diddell on August 4, 2026

Value of recent sales $477,975.88 Total consideration for 23,901 shares sold August 4, 2026

Stock awards 3,991; 3,602 shares Compensation stock awards dated July 22, 2020 and July 19, 2022

Stock option exercises 4,000; 16,000; 12,000 shares Option exercises in 2019, 2022, 2023 as compensation

Key Terms

Form 144, stock award, stock option exercise, aggregate market value, +1 more

5 terms

Form 144 regulatory

"WENDY S. DIDDELL ... 144: Remarks and Signature"

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 award financial

"Common | 07/22/2020 | Stock Award | ISSUER"

stock option exercise financial

"Common | 07/22/2019 | Stock Option Exercise | issuer"

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.

aggregate market value financial

"| 38993 | 811834.00 | 12520251 |"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

common stock financial

"Common | Fidelity Brokerage Services LLC 245 Summer Street"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/07/2026 - 03:27 PM Accepted by SEC EDGAR 08/07/2026 - 03:26 PM Learn about SEC filing dates

FAQ

What does Richardson Electronics (RELL) insider Wendy S. Diddell plan to sell under this Form 144?

Wendy S. Diddell plans to sell up to 38,993 Richardson Electronics common shares. The filing lists an aggregate market value of $811,834.00 for these shares, to be sold on NASDAQ around August 8, 2026.

How many Richardson Electronics (RELL) shares are reported outstanding in this Form 144?

The Form 144 reports that Richardson Electronics has 12,520,251 common shares outstanding. This figure provides context for the proposed sale of up to 38,993 shares by Wendy S. Diddell under this notice.

What prior awards and option exercises support the RELL shares to be sold by Wendy S. Diddell?

The shares to be sold come from stock awards of 3,991 and 3,602 shares, and stock option exercises of 4,000, 16,000, and 12,000 shares. These transactions are dated between 2019 and 2023 as compensation.

What RELL share sales has Wendy S. Diddell made in the last three months?

Over the past three months, Wendy S. Diddell sold 23,901 Richardson Electronics common shares. The filing states these sales occurred on August 4, 2026, for total consideration of $477,975.88.

On which market are the RELL shares in this Form 144 expected to be sold?

The filing indicates the Richardson Electronics common shares covered by this Form 144 are expected to be sold on NASDAQ. The planned sales of up to 38,993 shares are targeted around August 8, 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

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	Fidelity Brokerage Services LLC 245 Summer Street Boston MA 02110	38993	811834.00	12520251	08/08/2026	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	07/22/2020	Stock Award	ISSUER			3991	07/22/2020	Compensation
Common	07/19/2022	Stock Award	ISSUER			3602	07/19/2022	Compensation
Common	07/22/2019	Stock Option Exercise	issuer			4000	07/22/2019	Compensation
Common	07/19/2022	Stock Option Exercise	issuer			16000	07/19/2022	Compensation
Common	07/19/2023	Stock Option Exercise	issuer			12000	07/19/2023	Compensation

* 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
WENDY S. DIDDELL 40W267 KESLINGER ROAD LAFOX IL 60147	RICHARDSON ELECTRONICS LTD	08/04/2026	23901	477975.88

144: Remarks and Signature

Remarks

Date of Notice

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)