Knowles VP exercises options and sells shares

Knowles Corporation Vice President and Controller Air A. Bastarrica Jr. reported multiple equity transactions dated February 9, 2026.

Rhea-AI Filing Summary

Knowles Corporation Vice President and Controller Air A. Bastarrica Jr. reported multiple equity transactions dated February 9, 2026. He exercised non-qualified stock options covering 8,143 shares at $20.60 and 11,924 shares at $21.14 per share, converting them into common stock.

On the same date, he sold 2,433 common shares at $26.82 and 9,567 shares at $26.75 under code “S”. Additional transactions coded “F” show 10,304 and 6,958 shares withheld to cover the option exercise price and taxes, as described in the footnotes. After these moves, he directly owned 51,005 Knowles common shares.

Insider Trade Summary

Exercise and sale activity reported; no spread calculated

Exercise and Sale 8 txns

Insider Bastarrica Air A. Jr.

Role Vice President, Controller

Sold 12,000 shs ($321K)

Approx. gross sale proceeds $321K

Approx. exercise cost $420K

Type	Security	Shares	Price	Value
Exercise	Non-Qualified Stock Option (right to buy)	8,143	$20.60	$168K
Exercise	Non-Qualified Stock Option (right to buy)	11,924	$21.14	$252K
Sale	Common Stock	2,433	$26.82	$65K
Sale	Common Stock	9,567	$26.75	$256K
Exercise	Common Stock	11,924	$21.14	$252K
Exercise Price or Tax Liability	Common Stock	10,304	$27.24	$281K
Exercise	Common Stock	8,143	$20.60	$168K
Exercise Price or Tax Liability	Common Stock	6,958	$27.24	$190K

Holdings After Transaction: Non-Qualified Stock Option (right to buy) — 0 contracts (Direct); Common Stock — 51,005 shares (Direct)

Footnotes (2)

1. F1. These shares represent the payment of the option exercise price and tax liability by withholding securities.
2. F2. Options granted under the Knowles Corporation 2018 Equity and Cash Incentive Plan that vest ratably over three years commencing on the first anniversary of the award.

FAQ

What insider transactions did KN executive Air A. Bastarrica Jr. report?

Air A. Bastarrica Jr., a Knowles (KN) vice president and controller, reported exercising two non-qualified stock option grants and related stock sales. The filing shows option exercises, open-market sales, and share withholdings for taxes and exercise costs, all dated February 9, 2026.

How many Knowles (KN) shares did the executive sell on February 9, 2026?

The executive reported selling 2,433 Knowles common shares at $26.82 and 9,567 shares at $26.75 on February 9, 2026. These transactions are coded “S,” indicating open-market sales, and are part of a broader set of option exercises and related tax and exercise-price settlements.

What stock options did the Knowles (KN) executive exercise in this Form 4?

He exercised two non-qualified stock options, one for 8,143 shares at $20.60 and another for 11,924 shares at $21.14. Both options were granted under the Knowles Corporation 2018 Equity and Cash Incentive Plan and vest ratably over three years from the first anniversary.

Why were some Knowles (KN) shares withheld in the Form 4 transactions?

The Form 4 explains that certain shares, including 10,304 and 6,958 common shares, were withheld to pay the option exercise price and related tax liabilities. This is reflected by transaction code “F,” which indicates share withholding rather than open-market purchases or sales.

How many Knowles (KN) shares does the reporting person own after these trades?

After the reported February 9, 2026 transactions, Air A. Bastarrica Jr. directly owned 51,005 Knowles common shares. This post-transaction holding reflects the combined effects of stock option exercises, open-market sales, and share withholdings for exercise and tax obligations.

What is the role of Air A. Bastarrica Jr. at Knowles (KN)?

Air A. Bastarrica Jr. is an officer of Knowles Corporation, serving as Vice President and Controller. The Form 4 identifies him as a reporting person under Section 16, disclosing his direct ownership and recent common stock and stock option transactions in Knowles shares.

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Accepted by SEC EDGAR 02/10/2026 - 12:43 PM Learn about SEC filing dates

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^*

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)
02/09/2026

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	02/09/2026		S		2,433	D	$26.82	57,767	D
Common Stock	02/09/2026		S		9,567	D	$26.75	48,200	D
Common Stock	02/09/2026		M		11,924	A	$21.14	60,124	D
Common Stock	02/09/2026		F		10,304(1)	D	$27.24	49,820	D
Common Stock	02/09/2026		M		8,143	A	$20.6	57,963	D
Common Stock	02/09/2026		F		6,958(1)	D	$27.24	51,005	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
Non-Qualified Stock Option (right to buy)	$20.6	02/09/2026		M			8,143(2)	02/08/2022	02/08/2028	Common Stock	8,143	$20.6	0	D
Non-Qualified Stock Option (right to buy)	$21.14	02/09/2026		M			11,924(2)	02/07/2023	02/06/2029	Common Stock	11,924	$21.14	0	D

Explanation of Responses:

1. These shares represent the payment of the option exercise price and tax liability by withholding securities.

2. Options granted under the Knowles Corporation 2018 Equity and Cash Incentive Plan that vest ratably over three years commencing on the first anniversary of the award.

	By: Robyn B. Martin For: POA for Air A. Bastarrica, Jr.	02/10/2026
	** 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.
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