KN

SEC source: 0001598318-25-000005 · edgardoc.xml · nonDerivative · entry 2

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 205,859

F1 · shares: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 22, 2025.

SEC source: 0001598318-25-000005 · edgardoc.xml · nonDerivative · entry 1

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 207,299

F1 · shares: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 22, 2025.

SEC source: 0001598318-25-000002 · edgardoc.xml · nonDerivative · entry 3

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 217,299

SEC source: 0001598318-25-000002 · edgardoc.xml · nonDerivative · entry 2

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 227,299

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.75 to $20.89, 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.

SEC source: 0001598318-25-000002 · edgardoc.xml · nonDerivative · entry 1

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 237,299

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.67 to $21.055, 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.

SEC source: 0001598318-25-000004 · edgardoc.xml · nonDerivative · entry 3

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 217,299

F1 · shares: On November 21, 2025, the reporting person filed a Form 4 which inadvertently omitted that the transactions reported were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 22, 2025. This amended Form 4 does not report additional transactions, but rather corrects this omission.

SEC source: 0001598318-25-000004 · edgardoc.xml · nonDerivative · entry 2

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 227,299

F1 · shares: On November 21, 2025, the reporting person filed a Form 4 which inadvertently omitted that the transactions reported were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 22, 2025. This amended Form 4 does not report additional transactions, but rather corrects this omission.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.75 to $20.89, 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.

SEC source: 0001598318-25-000004 · edgardoc.xml · nonDerivative · entry 1

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 237,299

F1 · shares: On November 21, 2025, the reporting person filed a Form 4 which inadvertently omitted that the transactions reported were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 22, 2025. This amended Form 4 does not report additional transactions, but rather corrects this omission.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.67 to $21.055, 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.

SEC source: 0001535760-25-000002 · edgardoc.xml · derivative · entry 6

Niew Jeffrey · CIK 0001535760 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 38,404 shares

Expires 2026-02-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001535760-25-000002 · edgardoc.xml · nonDerivative · entry 4

Niew Jeffrey · CIK 0001535760 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 939,370

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.40 to $23.68, 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.

SEC source: 0001535760-25-000002 · edgardoc.xml · nonDerivative · entry 3

Niew Jeffrey · CIK 0001535760 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 977,774

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001535760-25-000002 · edgardoc.xml · derivative · entry 5

Niew Jeffrey · CIK 0001535760 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,404

Underlying: Common Stock · 98,252 shares

Expires 2026-02-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001535760-25-000002 · edgardoc.xml · nonDerivative · entry 2

Niew Jeffrey · CIK 0001535760 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 939,370

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.70 to $23.81, 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.

SEC source: 0001535760-25-000002 · edgardoc.xml · nonDerivative · entry 1

Niew Jeffrey · CIK 0001535760 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,037,622

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001587523-25-000074 · edgardoc.xml · derivative · entry 3

Cabrera Raymond D. · CIK 0001598091 · SVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 24,116 shares

Expires 2026-02-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001587523-25-000074 · edgardoc.xml · nonDerivative · entry 2

Cabrera Raymond D. · CIK 0001598091 · SVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 114,607

F1 · shares: These shares represent the payment of the option exercise price and tax liability by withholding securities.

SEC source: 0001587523-25-000074 · edgardoc.xml · nonDerivative · entry 1

Cabrera Raymond D. · CIK 0001598091 · SVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 135,402

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001587523-25-000073 · edgardoc.xml · derivative · entry 3

Giesecke Daniel J. · CIK 0001598086 · Senior Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 30,145 shares

Expires 2026-02-19

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001587523-25-000073 · edgardoc.xml · nonDerivative · entry 2

Giesecke Daniel J. · CIK 0001598086 · Senior Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 178,872

F1 · shares: These shares represent the payment of the option exercise price and tax liability by withholding securities.

SEC source: 0001587523-25-000073 · edgardoc.xml · nonDerivative · entry 1

Giesecke Daniel J. · CIK 0001598086 · Senior Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 204,736

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001587523-25-000072 · edgardoc.xml · derivative · entry 3

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 42,017 shares

Expires 2027-02-09

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001587523-25-000072 · edgardoc.xml · nonDerivative · entry 2

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 247,299

F1 · shares: These shares represent the payment of the option exercise price and tax liability by withholding securities.

SEC source: 0001587523-25-000072 · edgardoc.xml · nonDerivative · entry 1

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 284,424

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001587523-25-000071 · edgardoc.xml · nonDerivative · entry 1

SHAVERS CHERYL L · CIK 0001196914 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,776

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.99 to $20.13, 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.

SEC source: 0001587523-25-000070 · edgardoc.xml · nonDerivative · entry 1

Bastarrica Air A. Jr. · CIK 0001745084 · Vice President, Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,537

F1 · price: 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.

SEC source: 0001587523-25-000068 · edgardoc.xml · derivative · entry 8

PERNA ROBERT J · CIK 0001181355 · SVP, General Counsel & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 26,718 shares

Expires 2026-02-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001587523-25-000068 · edgardoc.xml · derivative · entry 7

PERNA ROBERT J · CIK 0001181355 · SVP, General Counsel & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 29,412 shares

Expires 2027-02-09

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001587523-25-000068 · edgardoc.xml · nonDerivative · entry 5

PERNA ROBERT J · CIK 0001181355 · SVP, General Counsel & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,552

SEC source: 0001587523-25-000068 · edgardoc.xml · nonDerivative · entry 4

PERNA ROBERT J · CIK 0001181355 · SVP, General Counsel & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 95,964

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001587523-25-000068 · edgardoc.xml · nonDerivative · entry 3

PERNA ROBERT J · CIK 0001181355 · SVP, General Counsel & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,552

SEC source: 0001587523-25-000068 · edgardoc.xml · nonDerivative · entry 2

PERNA ROBERT J · CIK 0001181355 · SVP, General Counsel & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,270

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001587523-25-000058 · edgardoc.xml · nonDerivative · entry 2

Cabrera Raymond D. · CIK 0001598091 · SVP, HR & Chief Admin. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 111,286

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.24 to $17.25, 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.

SEC source: 0001587523-25-000058 · edgardoc.xml · nonDerivative · entry 1

Cabrera Raymond D. · CIK 0001598091 · SVP, HR & Chief Admin. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 116,623

SEC source: 0001587523-25-000047 · edgardoc.xml · nonDerivative · entry 1

Angelini Laura · CIK 0001949708 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,046

F1 · shares: Restricted Stock Units (RSU) awarded as compensation for services as a Director pursuant to the Knowles Corporation 2018 Equity and Cash Incentive Plan. The RSUs will vest on the first anniversary of the grant.

SEC source: 0001587523-25-000052 · edgardoc.xml · nonDerivative · entry 2

Li Ye Jane · CIK 0001667921 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,028

F2 · shares: Restricted Stock Units (RSU) awarded as compensation for services as a Director pursuant to the Knowles Corporation 2018 Equity and Cash Incentive Plan. The RSUs will vest on the first anniversary of the grant.

SEC source: 0001587523-25-000055 · edgardoc.xml · nonDerivative · entry 1

BARNES KEITH · CIK 0001268517 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,082

F1 · shares: Restricted Stock Units (RSU) awarded as compensation for services as a Director pursuant to the Knowles Corporation 2018 Equity and Cash Incentive Plan. The RSUs will vest on the first anniversary of the grant.

SEC source: 0001587523-25-000053 · edgardoc.xml · nonDerivative · entry 1

SHAVERS CHERYL L · CIK 0001196914 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,823

F1 · shares: Restricted Stock Units (RSU) awarded as compensation for services as a Director pursuant to the Knowles Corporation 2018 Equity and Cash Incentive Plan. The RSUs will vest on the first anniversary of the grant.

SEC source: 0001587523-25-000051 · edgardoc.xml · nonDerivative · entry 1

HIRSCH DIDIER · CIK 0001226464 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,299

F1 · shares: Restricted Stock Units (RSU) awarded as compensation for services as a Director pursuant to the Knowles Corporation 2018 Equity and Cash Incentive Plan. The RSUs will vest on the first anniversary of the grant.

SEC source: 0001587523-25-000049 · edgardoc.xml · nonDerivative · entry 1

Crowley Daniel J · CIK 0001504939 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,818

F1 · shares: Restricted Stock Units (RSU) awarded as compensation for services as a Director pursuant to the Knowles Corporation 2018 Equity and Cash Incentive Plan. The RSUs will vest on the first anniversary of the grant.

SEC source: 0001587523-25-000050 · edgardoc.xml · nonDerivative · entry 1

Cardew Jason M · CIK 0001529005 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,149

F1 · shares: Restricted Stock Units (RSU) awarded as compensation for services as a Director pursuant to the Knowles Corporation 2018 Equity and Cash Incentive Plan. The RSUs will vest on the first anniversary of the grant.

SEC source: 0001587523-25-000054 · edgardoc.xml · nonDerivative · entry 1

WISHART MICHAEL S · CIK 0001593411 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,455

F1 · shares: Restricted Stock Units (RSU) awarded as compensation for services as a Director pursuant to the Knowles Corporation 2018 Equity and Cash Incentive Plan. The RSUs will vest on the first anniversary of the grant.

SEC source: 0001587523-25-000068 · edgardoc.xml · nonDerivative · entry 6

PERNA ROBERT J · CIK 0001181355 · SVP, General Counsel & Sec

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 9,221

F1 · price: Not applicable to this transaction

SEC source: 0001587523-25-000068 · edgardoc.xml · nonDerivative · entry 1

PERNA ROBERT J · CIK 0001181355 · SVP, General Counsel & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,552

F1 · price: Not applicable to this transaction

SEC source: 0001587523-25-000026 · edgardoc.xml · nonDerivative · entry 1

PERNA ROBERT J · CIK 0001181355 · SVP, General Counsel & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 75,773

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.01 to $17.04, 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.

SEC source: 0001587523-25-000022 · edgardoc.xml · nonDerivative · entry 1

PERNA ROBERT J · CIK 0001181355 · SVP, General Counsel & Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,782

F1 · shares: These shares represent the payment of the tax liability by withholding securities incident to the vesting of a restricted stock grant issued on February 20, 2024 in accordance with Rule 16b-3.

SEC source: 0001587523-25-000021 · edgardoc.xml · nonDerivative · entry 1

Niew Jeffrey · CIK 0001535760 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 939,370

F1 · shares: These shares represent the payment of the tax liability by withholding securities incident to the vesting of a restricted stock grant issued on February 20, 2024 in accordance with Rule 16b-3.

SEC source: 0001587523-25-000020 · edgardoc.xml · nonDerivative · entry 1

Giesecke Daniel J. · CIK 0001598086 · Senior Vice President & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 174,591

F1 · shares: These shares represent the payment of the tax liability by withholding securities incident to the vesting of a restricted stock grant issued on February 20, 2024 in accordance with Rule 16b-3.

SEC source: 0001587523-25-000019 · edgardoc.xml · nonDerivative · entry 1

Cabrera Raymond D. · CIK 0001598091 · SVP, HR & Chief Admin. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 116,831

F1 · shares: These shares represent the payment of the tax liability by withholding securities incident to the vesting of a restricted stock grant issued on February 20, 2024 in accordance with Rule 16b-3.

SEC source: 0001587523-25-000018 · edgardoc.xml · nonDerivative · entry 1

Bastarrica Air A. Jr. · CIK 0001745084 · Vice President, Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,537

F1 · shares: These shares represent the payment of the tax liability by withholding securities incident to the vesting of a restricted stock grant issued on February 20, 2024 in accordance with Rule 16b-3.

SEC source: 0001587523-25-000017 · edgardoc.xml · nonDerivative · entry 1

Anderson John S. · CIK 0001598318 · Senior Vice President & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 242,407

F1 · shares: These shares represent the payment of the tax liability by withholding securities incident to the vesting of a restricted stock grant issued on February 20, 2024 in accordance with Rule 16b-3.