[Form 4] Diodes Inc Insider Trading Activity

Rhea-AI Filing Summary

Emily Yang, SVP Worldwide Sales/Marketing at Diodes Incorporated (DIOD), reported an insider sale on 08/19/2025. The filing shows she disposed of 1,000 shares of Diodes common stock at $53.2174 per share, leaving 60,479 shares held directly after the sale. The report also lists 23,100 performance stock units and indirect holdings of 584 shares via the Oner Family Revocable Trust plus 1,576 shares held in custodial accounts for her children (which she disclaims as beneficial ownership). The Form 4 was signed by Brett R. Whitmire as Power of Attorney on 08/21/2025. The filing documents a routine insider disposition and discloses related indirect and custodial holdings.

Positive

• Transaction transparently disclosed with price, quantity, and post-transaction holdings
• Substantial remaining direct holdings (60,479 shares) and 23,100 performance stock units remain after sale
• Custodial and trust holdings disclosed with a disclaimer, clarifying family-related ownership

Negative

• Insider sale of 1,000 shares which may be viewed negatively by some investors despite being modest
• No Rule 10b5-1 plan indicated in the filing, so the sale is not identified as part of a pre-arranged plan

Insights

Financial Analyst

TL;DR: Insider sold a small block of shares; remaining direct and PSU holdings remain sizable relative to the trade.

The 1,000-share sale at $53.2174 appears to be a modest disposition relative to the reported direct stake of 60,479 shares and 23,100 performance stock units. This reduces direct holdings but does not materially alter overall ownership shown in the filing. The disclosure of custodial and trust-held shares clarifies indirect family holdings and includes the customary disclaimer of beneficial ownership for custodial accounts.

Corporate Governance Expert

TL;DR: Filing meets Section 16 transparency requirements; custodial disclaimer and POA signature are properly disclosed.

The Form 4 provides required transparency about an insider sale and details of indirect holdings. The signature by a Power of Attorney and the explicit custodial disclaimer for children's accounts are standard governance disclosures. There is no indication in the filing of a Rule 10b5-1 plan or other pre-arranged trading plan.

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^*

Yang Emily

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP Worldwide Sales/Marketing

3. Date of Earliest Transaction (Month/Day/Year)
08/19/2025

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	08/19/2025		S		1,000	D	$53.2174	60,479	D
Diodes Incorporated Common Stock - Performance Stock Units								23,100	D
Diodes Incorporated Common Stock								584	I	Oner Family Revocable Trust
Diodes Incorporated Common Stock								1,576(1)	I	Custodial

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. These shares are held in accounts for the reporting persons children, 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 Emily Yang	08/21/2025
	** 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 did Emily Yang (DIOD) report in the Form 4?

She reported a sale of 1,000 shares of Diodes common stock on 08/19/2025 at $53.2174 per share and disclosed post-transaction holdings.

How many shares does Emily Yang directly own after the sale?

The filing shows 60,479 shares held directly following the reported transaction.

Does the Form 4 disclose other types of holdings for Emily Yang?

Yes. It shows 23,100 performance stock units, 584 shares held indirectly via the Oner Family Revocable Trust, and 1,576 shares in custodial accounts for her children (she disclaims beneficial ownership of custodial shares).

Was the Form 4 signed directly by Emily Yang?

No. The form was signed by Brett R. Whitmire as Power of Attorney on 08/21/2025.

Is there any indication the sale was made under a 10b5-1 trading plan?

The filing does not indicate that the transaction was made pursuant to a Rule 10b5-1 trading plan.