[Form 4] DIODES INC /DEL/ Insider Trading Activity

Rhea-AI Filing Summary

Diodes Incorporated director Keh-Shew Lu reported open-market sales of company stock. On 11/12/2025, a Lu family trust sold 3,905 shares of Diodes Incorporated common stock at a weighted average price of $47.3972 per share, and the Lu Grandchildren's Trust sold 2,095 shares at a weighted average price of $47.4552 per share. After these transactions, the Lu Grandchildren's Trust held 271,886 shares indirectly, and Texastac Investments, LP held 244,397 shares indirectly. Additional indirect holdings include 104,625 shares held directly, 46,150 shares in custodial accounts for minor grandchildren, 6,000 shares in The Lu Family Foundation, 4,700 shares in The Lu 2017 Irrevocable Trust, and 92,000 performance stock units held directly.

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

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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^*

LU KEH SHEW

(Last) (First) (Middle)

4949 HEDGCOXE ROAD

SUITE 200

(Street)

PLANO TX 75024

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
11/12/2025

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

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

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

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)
			Code	V	Amount	(A) or (D)	Price
Diodes Incorporated Common Stock	11/12/2025		S		3,905	D	$47.3972(1)	271,886	I	Lu Grandchildren's Trust
Diodes Incorporated Common Stock	11/12/2025		S		2,095	D	$47.4552(2)	244,397	I	Texastac Investments, LP
Diodes Incorporated Common Stock								104,625	D
Diodes Incorporated Common Stock								46,150(3)	I	Custodial
Diodes Incorporated Common Stock								6,000	I	The Lu Family Foundation
Diodes Incorporated Common Stock								4,700	I	The Lu 2017 Irrevocable Trust
Diodes Incorporated Common Stock - Performance Stock Units								92,000	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.14 to $47.61, inclusive. The reporting person undertakes to provide to Diodes Incorporated, any security holder of Diodes Incorporated, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.

2. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $47.21 to $47.73, inclusive. The reporting person undertakes to provide to Diodes Incorporated, any security holder of Diodes Incorporated, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4.

3. These shares are held in accounts for the reporting persons minor grandchildren and the reporting person is the custodian of those accounts. The reporting person disclaims ownership of the shares held in those custodial accounts, and this report is not an admission that the reporting person is the beneficial owner of these shares for purposes of Section 16 or for any other purposes.

	Brett R. Whitmire as Power of Attorney for Keh-Shew Lu	11/13/2025
	** 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.

FAQ

What insider transaction did DIODES INC (DIOD) disclose in this Form 4?

The filing shows that director Keh-Shew Lu reported sales of Diodes Incorporated common stock on 11/12/2025 by family-related trusts. One trust sold 3,905 shares and another sold 2,095 shares in open-market transactions.

At what prices were the DIOD shares sold in the reported transactions?

The Lu family-related trusts sold Diodes Incorporated common stock at weighted average prices of $47.3972 per share for the 3,905 shares and $47.4552 per share for the 2,095 shares. The trades occurred within price ranges disclosed in the footnotes.

How many DIOD shares does Keh-Shew Lu beneficially own after the reported trades?

After the reported transactions, indirect holdings include 271,886 shares in the Lu Grandchildren's Trust and 244,397 shares through Texastac Investments, LP. Additional positions include 104,625 shares held directly, 46,150 shares in custodial accounts for minor grandchildren, 6,000 shares in The Lu Family Foundation, 4,700 shares in The Lu 2017 Irrevocable Trust, and 92,000 performance stock units held directly.

What is the relationship of the reporting person to DIODES INC (DIOD)?

The reporting person, Keh-Shew Lu, is identified as a director of Diodes Incorporated. The Form 4 also notes that the filing is made by one reporting person.

How are the DIOD shares in custodial accounts treated in this Form 4?

The filing explains that 46,150 shares are held in accounts for the reporting person's minor grandchildren, with the reporting person as custodian. The reporting person disclaims ownership of these shares, and the report states it is not an admission of beneficial ownership for Section 16 or other purposes.

What do the footnotes say about the DIOD trade price ranges?

The footnotes state that the reported prices are weighted averages. The 3,905 shares were sold in multiple trades at prices from $47.14 to $47.61, and the 2,095 shares were sold in trades from $47.21 to $47.73. The reporting person undertakes to provide full trade-by-trade details upon request.