Silicon Labs (SLAB) CAO adds shares through 2009 Employee Stock Purchase Plan

Rhea-AI Filing Summary

Silicon Laboratories Inc. Chief Accounting Officer Mark D. Mauldin acquired 18 shares of common stock on the issuer’s employee purchase date at a price of $86.46 per share. After this transaction, he directly holds 21,948 common shares.

The shares were acquired through Silicon Laboratories’ 2009 Employee Stock Purchase Plan in a transaction described as exempt under Rule 166-3(c) and Rule 166-3(d), indicating this was a routine, compensation-related purchase rather than an open-market trade.

Insider Trade Summary

Net Buyer: 18 shares

Net Buy 1 txn

Insider MAULDIN MARK D

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, $0.0001 par value	18	$86.46	$2K

Holdings After Transaction: Common Stock, $0.0001 par value — 21,948 shares (Direct)

Footnotes (1)

1. F1. Shares acquired by Reporting Person through the Issuer's 2009 Employee Stock Purchase Plan on the most recent semi-annual purchase date in a transaction exempt under both Rule 166-3(c) and Rule 166-3(d).

Key Figures

Shares acquired: 18 shares Purchase price: $86.46 per share Shares owned after transaction: 21,948 shares

3 metrics

Shares acquired 18 shares Common Stock acquired on 2026-04-30

Purchase price $86.46 per share Price under 2009 Employee Stock Purchase Plan

Shares owned after transaction 21,948 shares Direct common stock holdings after acquisition

Key Terms

2009 Employee Stock Purchase Plan, Rule 166-3(c), Rule 166-3(d), Common Stock, $0.0001 par value

4 terms

2009 Employee Stock Purchase Plan financial

"Shares acquired by Reporting Person through the Issuer's 2009 Employee Stock Purchase Plan"

Rule 166-3(c) regulatory

"in a transaction exempt under both Rule 166-3(c) and Rule 166-3(d)"

Rule 166-3(d) regulatory

"in a transaction exempt under both Rule 166-3(c) and Rule 166-3(d)"

Common Stock, $0.0001 par value financial

"security_title": "Common Stock, $0.0001 par value""

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 05/01/2026 - 04:57 PM Learn about SEC filing dates

FAQ

What insider transaction did Silicon Laboratories (SLAB) report for Mark D. Mauldin?

Silicon Laboratories reported that Chief Accounting Officer Mark D. Mauldin acquired 18 shares of common stock. The transaction occurred via the company’s 2009 Employee Stock Purchase Plan and reflects a routine, compensation-related share acquisition rather than an open-market trade.

At what price did Mark D. Mauldin acquire Silicon Laboratories (SLAB) shares?

Mark D. Mauldin acquired 18 Silicon Laboratories common shares at $86.46 per share. This price is the purchase price under the company’s 2009 Employee Stock Purchase Plan on the most recent semi-annual purchase date, as disclosed in the Form 4 filing.

How many Silicon Laboratories (SLAB) shares does Mark D. Mauldin hold after this Form 4 transaction?

After the reported transaction, Mark D. Mauldin directly holds 21,948 shares of Silicon Laboratories common stock. This total reflects his updated direct ownership position following the acquisition of 18 shares through the company’s 2009 Employee Stock Purchase Plan.

What was the source of the new Silicon Laboratories (SLAB) shares acquired by Mark D. Mauldin?

The 18 newly acquired shares came through Silicon Laboratories’ 2009 Employee Stock Purchase Plan. The filing notes the acquisition occurred on the most recent semi-annual purchase date, characterizing it as a routine employee purchase plan transaction rather than a discretionary market trade.

Was Mark D. Mauldin’s Silicon Laboratories (SLAB) share acquisition exempt under SEC rules?

Yes. The filing states the shares were acquired in a transaction exempt under Rule 166-3(c) and Rule 166-3(d). This indicates the purchase qualified for specific exemptions, consistent with routine employee stock purchase plan acquisitions rather than open-market trading activity.

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^*

MAULDIN MARK D

(Last) (First) (Middle)

400 WEST CESAR CHAVEZ

(Street)

AUSTIN TEXAS 78701

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SILICON LABORATORIES INC. [ SLAB ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/30/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock, $0.0001 par value	04/30/2026		A	V	18(1)	A	$86.46	21,948	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. Shares acquired by Reporting Person through the Issuer's 2009 Employee Stock Purchase Plan on the most recent semi-annual purchase date in a transaction exempt under both Rule 166-3(c) and Rule 166-3(d).

Remarks:

	Saie-Yau Hui for Mark D Mauldin	05/01/2026
	** 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)