[Form 4] KNOWLES CORPORATION Insider Trading Activity

Rhea-AI Filing Summary

On 07/29/2025, Air A. Bastarrica Jr.—Vice President & Controller of Knowles Corp (KN)—sold 10,000 common shares in open-market trades recorded at a weighted-average price of $20.94 (individual prices ranged $20.94-$20.95). Approximate gross proceeds total about $0.21 million.

After the sale, the insider owns 62,537 KN shares directly; no derivative securities were reported. The footnote states that detailed trade-by-trade pricing will be provided upon request. No other transactions, amendments or Rule 10b5-1 notations appear in this filing.

Positive

• Insider retains 62,537 shares, indicating continued equity alignment with shareholders.

Negative

• Sale of 10,000 shares (≈14% of prior holdings) may be viewed as a modest bearish signal by some investors.

Insights

Securities Analyst

TL;DR: Routine insider sale; modest size; unlikely to move KN fundamentals.

The Form 4 shows a single open-market sale by a senior finance executive. The 10,000-share disposal equals roughly 14% of the filer’s pre-trade direct holdings, suggesting portfolio rebalancing rather than a wholesale exit. No derivative activity or 10b5-1 plan is cited, so timing appears discretionary. While insider selling can be perceived negatively, the transaction value (~$0.21 M) is immaterial relative to Knowles’ market cap and does not signal operational issues. Overall impact on valuation or governance outlook is neutral.

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
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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^*

Bastarrica Air A. Jr.

(Last) (First) (Middle)

1151 MAPLEWOOD DRIVE

(Street)

ITASCA IL 60143

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Knowles Corp [ KN ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Vice President, Controller

3. Date of Earliest Transaction (Month/Day/Year)
07/29/2025

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
Common Stock	07/29/2025		S		10,000	D	$20.94(1)	62,537	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 in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.94 to $20.95 inclusive. The reporting person undertakes to provide to Knowles Corporation, any security holder of Knowles Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased/sold at each separate price within the ranges set forth in this footnote to this Form 4.

	By: Robyn B. Martin For: Air A. Bastarrica, Jr.	07/31/2025
	** 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

How many Knowles (KN) shares did Air A. Bastarrica Jr. sell?

The Form 4 reports a sale of 10,000 common shares.

What price range were the KN shares sold at?

Shares were sold between $20.94 and $20.95, with a weighted-average price of $20.94.

How many KN shares does the insider still own after the sale?

Following the transaction, Bastarrica directly owns 62,537 shares.

Were any derivative securities involved in this Form 4 filing?

No, the filing shows no derivative security activity.

When was the transaction executed and when was the form filed?

The sale occurred on 07/29/2025, and the Form 4 was signed on 07/31/2025.

What is Air A. Bastarrica Jr.’s position at Knowles Corporation?

He is the company’s Vice President & Controller.