Diodes (DIOD) CTO logs stock sale and PSU reduction

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Diodes Incorporated Chief Technology Officer Francis Tang reported two updates to his equity holdings. First, his beneficial ownership of Diodes performance stock units fell by 9,000 because the 2023 PSU award had no settlement of shares, leaving 28,200 units recorded as directly held.

He also completed an open-market sale of 3,643 shares of Diodes common stock at $108.00 per share. After this sale, Tang directly holds 95,905 shares of Diodes common stock, so the transaction represents only a portion of his overall position.

Insider Trade Summary

Net Seller: 3,643 shares ($393,444)

Net Sell 2 txns

Insider Tang Francis

Role Chief Technology Officer

Sold 3,643 shs ($393K)

Type	Security	Shares	Price	Value
Sale	Diodes Incorporated Common Stock	3,643	$108.00	$393K
holding	Diodes Incorporated Common Stock - Performance Stock Units	--	--	--

Holdings After Transaction: Diodes Incorporated Common Stock — 95,905 shares (Direct, null); Diodes Incorporated Common Stock - Performance Stock Units — 28,200 shares (Direct, null)

Footnotes (1)

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Key Figures

Common shares sold: 3,643 shares Sale price: $108.00 per share Shares held after sale: 95,905 shares +2 more

5 metrics

Common shares sold 3,643 shares Open-market sale on 2026-05-12

Sale price $108.00 per share Diodes common stock transaction

Shares held after sale 95,905 shares Direct Diodes common stock ownership post-transaction

PSUs after adjustment 28,200 units Diodes performance stock units directly beneficially owned

PSU decrease 9,000 units 2023 PSU award had no settlement of shares

Key Terms

Performance Stock Units, beneficially owned, open-market sale, Chief Technology Officer

4 terms

Performance Stock Units financial

"Diodes Incorporated Common Stock - Performance Stock Units"

Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.

beneficially owned financial

"The amount of securities beneficially owned was decreased by 9,000"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Chief Technology Officer financial

"officer_title": "Chief Technology Officer""

The chief technology officer is the senior executive who sets a company's technology vision and oversees development, engineering, and technical operations—think of them as the lead architect and head mechanic who decides what tools the business builds and how they run. Their choices affect product direction, cost structure, cybersecurity and scalability, so investors watch the CTO to gauge a company’s ability to innovate, compete and manage technical risk.

Form 4 Insider Transactions: What Each Field Means →

05/13/2026 - 05:50 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Tang Francis

(Last)

(First)

(Middle)

4949 HEDGCOXE ROAD

SUITE 200

(Street)

PLANO

TEXAS

75024

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
DIODES INC /DEL/ [ DIOD ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Chief Technology Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/12/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Diodes Incorporated Common Stock	05/12/2026		S		3,643	D	$108	95,905	D
Diodes Incorporated Common Stock - Performance Stock Units								28,200⁽¹⁾	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The amount of securities beneficially owned was decreased by 9,000 because the 2023 PSU Award had no settlement of shares.

	Brett R. Whitmire as Power of Attorney for Francis Tang	05/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Diodes (DIOD) CTO Francis Tang report?

Francis Tang reported selling 3,643 shares of Diodes common stock in an open-market transaction at $108.00 per share. He also disclosed a reduction in performance stock units after the 2023 PSU award generated no share settlement.

How many Diodes (DIOD) shares did the CTO sell and at what price?

The Chief Technology Officer sold 3,643 shares of Diodes common stock at $108.00 per share. This was classified as a sale in the open market or a private transaction under transaction code S in the insider filing.

How many Diodes (DIOD) shares does Francis Tang hold after the sale?

After selling 3,643 shares, Francis Tang directly holds 95,905 shares of Diodes common stock. This remaining stake, as reported in the filing, shows he continues to own a sizable position in the company’s equity.

What happened to Francis Tang’s 2023 performance stock unit (PSU) award at Diodes?

The 2023 PSU award resulted in no settlement of shares, which reduced his beneficially owned performance stock units by 9,000. Following this adjustment, the filing reports 28,200 Diodes performance stock units as beneficially owned directly by Tang.

What types of securities are covered in this Diodes (DIOD) Form 4 filing?

The filing covers Diodes Incorporated common stock and performance stock units tied to the company’s common stock. It reports an open-market sale of common shares and an adjustment to the number of performance stock units beneficially owned by the Chief Technology Officer.

Is the Diodes (DIOD) CTO’s transaction classified as an open-market sale?

Yes. The transaction for 3,643 Diodes common shares is labeled with transaction code S, described as a sale in the open market or a private transaction. This distinguishes it from grants, tax withholdings, or purely administrative adjustments.