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person · Reporting owner

Heinzmann David W

Disclosed activity across 2 companies

Tapewire entity
47061
SEC CIK
0001279765

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Gentherm IncTHRM · Entity 4845DirectorMay 14, 2026May 15, 2026
LITTELFUSE INC /DELFUS · Entity 3514Director · President & CEOAugust 26, 2024August 27, 2024

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Gentherm Inc

Report date May 14, 2026 · Filed May 15, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect21,365 Reported balance After 2026-05-14 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2026-05-14 · Grant · Acquired 4,292 · Balance 21,365

F1: The shares represent Restricted Common Stock issued under the 2023 Equity Incentive Plan that has been granted to the Reporting Person as compensation for serving on the Gentherm Board of Directors.

Filing footnotes · ownership attribution and instrument terms

F1: The shares represent Restricted Common Stock issued under the 2023 Equity Incentive Plan that has been granted to the Reporting Person as compensation for serving on the Gentherm Board of Directors.

LITTELFUSE INC /DE

Report date August 26, 2024 · Filed August 27, 2024

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect59,654 Ending reported balance After 2024-08-26 transaction · row 3
3 source rows · reconciled sequence

Row 1 · 2024-08-26 · Exercise / conversion · Acquired 2,091 · Balance 61,745

Row 2 · 2024-08-26 · Sale · Disposed 749 · Balance 60,996

F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 6, 2024.

F3: The shares were sold in multiple transactions at prices ranging from $273.59 to $274.59, inclusive. This amount represents the weighted average sale price of such transactions. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request of the Securities and exchange Commission, the Issuer, or a security holder of the Issuer.

Row 3 · 2024-08-26 · Sale · Disposed 1,342 · Balance 59,654

F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 6, 2024.

F4: The shares were sold in multiple transactions at prices ranging from $274.81 to $275.66, inclusive. This amount represents the weighted average sale price of such transactions. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request of the Securities and exchange Commission, the Issuer, or a security holder of the Issuer.

Stock Option (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $192.59 · Expires 2025-04-27Direct0 Reported balance After 2024-08-26 transaction · row 4 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 4 · 2024-08-26 · Exercise / conversion · Disposed 2,091 · Balance 0

F2: The option for 23,061 shares vested in increments of one third annually beginning on the first anniversary of the April 27, 2018 date of grant.

Filing footnotes · ownership attribution and instrument terms

F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 6, 2024.

F2: The option for 23,061 shares vested in increments of one third annually beginning on the first anniversary of the April 27, 2018 date of grant.

F3: The shares were sold in multiple transactions at prices ranging from $273.59 to $274.59, inclusive. This amount represents the weighted average sale price of such transactions. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request of the Securities and exchange Commission, the Issuer, or a security holder of the Issuer.

F4: The shares were sold in multiple transactions at prices ranging from $274.81 to $275.66, inclusive. This amount represents the weighted average sale price of such transactions. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request of the Securities and exchange Commission, the Issuer, or a security holder of the Issuer.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
April 28, 2019 Filed Apr 30, 2019 19:59 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Tax withholdingCommon Stock 951 $199.24 $189,477.24
Disclosure

SEC source: 0001567619-19-009446 · doc1.xml · nonDerivative · entry 3

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,307

F2 · price: Closing price per share on the preceding trading date of the vesting of restricted stock units.

Read SEC document
April 27, 2019 Filed Apr 30, 2019 19:59 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Tax withholdingCommon Stock 996 $199.24 $198,443.04
Disclosure

SEC source: 0001567619-19-009446 · doc1.xml · nonDerivative · entry 2

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,258

F2 · price: Closing price per share on the preceding trading date of the vesting of restricted stock units.

Read SEC document
April 26, 2019 Filed Apr 30, 2019 19:59 UTC LITTELFUSE INC /DE LFUS · Entity 3514 GrantStock Option (right to buy) · Derivative 25,888 $0.00 Strike: $199.24 $0.00
Disclosure

SEC source: 0001567619-19-009446 · doc1.xml · derivative · entry 5

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,888

Underlying: Common Stock · 25,888 shares

Expires 2026-04-26

F3 · derivative.exercise_date: The option vests in increments of one third annually beginning on the first anniversary of the date of grant.

Read SEC document
April 26, 2019 Filed Apr 30, 2019 19:59 UTC LITTELFUSE INC /DE LFUS · Entity 3514 GrantCommon Stock 7,609 $0.00 $0.00
Disclosure

SEC source: 0001567619-19-009446 · doc1.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,254

F1 · shares: Represents the grant of restricted stock units to the reporting person pursuant to the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan. The grant vests in increments of one third annually beginning on the first anniversary of the date of grant.

Read SEC document
April 22, 2019 Filed Apr 24, 2019 16:29 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Tax withholdingCommon Stock 702 $198.05 $139,031.10
Disclosure

SEC source: 0001567619-19-009098 · doc1.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,645

F1 · price: Closing price per share on date of vesting of restricted stock units.

Read SEC document
April 28, 2018 Filed May 1, 2018 14:03 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Tax withholdingCommon Stock 951 $192.59 $183,153.09
Disclosure

SEC source: 0001140361-18-020750 · doc1.xml · nonDerivative · entry 2

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,347

F2 · price: Closing price per share on date of vesting of restricted stock units.

Read SEC document
April 27, 2018 Filed May 1, 2018 14:03 UTC LITTELFUSE INC /DE LFUS · Entity 3514 GrantStock Option (right to buy) · Derivative 23,061 $0.00 Strike: $192.59 $0.00
Disclosure

SEC source: 0001140361-18-020750 · doc1.xml · derivative · entry 4

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,061

Underlying: Common Stock · 23,061 shares

Expires 2025-04-27

F3 · derivative.exercise_date: The option vests in increments of one third annually beginning on the first anniversary of the date of grant.

Read SEC document
April 27, 2018 Filed May 1, 2018 14:03 UTC LITTELFUSE INC /DE LFUS · Entity 3514 GrantCommon Stock 6,744 $0.00 $0.00
Disclosure

SEC source: 0001140361-18-020750 · doc1.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,298

F1 · shares: Represents the grant of restricted stock units to the reporting person pursuant to the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan. The grant vests 33% annually on the first three anniversaries of the grant date.

Read SEC document
April 24, 2018 Filed Apr 25, 2018 20:17 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Tax withholdingCommon Stock 685 $199.26 $136,493.10
Disclosure

SEC source: 0001140361-18-019534 · doc1.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,554

F1 · price: Closing price per share on date of vesting of restricted stock units.

Read SEC document
April 22, 2018 Filed Apr 24, 2018 15:03 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Tax withholdingCommon Stock 702 $204.12 $143,292.24
Disclosure

SEC source: 0001140361-18-019318 · doc1.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,239

F1 · price: Closing price per share on date of vesting of restricted stock units.

Read SEC document
February 26, 2018 Filed Feb 27, 2018 16:46 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Exercise / conversionStock Option (right to buy) · Derivative 11,100 $0.00 Strike: $66.68 $0.00
Disclosure

SEC source: 0001140361-18-010339 · doc1.xml · derivative · entry 4

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 11,100 shares

Expires 2020-04-26

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.

F1 · derivative.exercise_date: The option for 11,100 shares vested in increments of one third annually beginning on the first anniversary of the April 26, 2013 date of grant.

Read SEC document
February 26, 2018 Filed Feb 27, 2018 16:46 UTC LITTELFUSE INC /DE LFUS · Entity 3514 SaleCommon Stock 11,100 $212.00 $2,353,200.00
Disclosure

SEC source: 0001140361-18-010339 · doc1.xml · nonDerivative · entry 2

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,941

Read SEC document
February 26, 2018 Filed Feb 27, 2018 16:46 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Exercise / conversionCommon Stock 11,100 $66.68 $740,148.00
Disclosure

SEC source: 0001140361-18-010339 · doc1.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,041

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.

Read SEC document
February 20, 2018 Filed Feb 21, 2018 19:46 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Exercise / conversionStock Option (right to buy) · Derivative 5,000 $0.00 Strike: $63.09 $0.00
Disclosure

SEC source: 0001140361-18-009297 · doc1.xml · derivative · entry 4

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,000 shares

Expires 2019-04-27

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.

F1 · derivative.exercise_date: The option for 10,700 shares vested in increments of one third annually beginning on the first anniversary of the April 27, 2012 date of grant.

Read SEC document
February 20, 2018 Filed Feb 21, 2018 19:46 UTC LITTELFUSE INC /DE LFUS · Entity 3514 SaleCommon Stock 5,000 $209.90 $1,049,500.00
Disclosure

SEC source: 0001140361-18-009297 · doc1.xml · nonDerivative · entry 2

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,941

Read SEC document
February 20, 2018 Filed Feb 21, 2018 19:46 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Exercise / conversionCommon Stock 5,000 $63.09 $315,450.00
Disclosure

SEC source: 0001140361-18-009297 · doc1.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,941

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.

Read SEC document
April 28, 2017 Filed May 1, 2017 18:36 UTC LITTELFUSE INC /DE LFUS · Entity 3514 GrantStock Option (right to buy) · Derivative 24,066 $0.00 Strike: $154.15 $0.00
Disclosure

SEC source: 0001140361-17-017555 · doc1.xml · derivative · entry 3

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,066

Underlying: Common Stock · 24,066 shares

Expires 2024-04-28

F2 · derivative.exercise_date: The option vests in increments of one third annually beginning on the first anniversary of the date of grant.

Read SEC document
April 28, 2017 Filed May 1, 2017 18:36 UTC LITTELFUSE INC /DE LFUS · Entity 3514 GrantCommon Stock 6,438 $0.00 $0.00
Disclosure

SEC source: 0001140361-17-017555 · doc1.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,941

F1 · shares: Represents the grant of restricted stock units to the reporting person pursuant to the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan. The grant vests in increments of one third annually beginning on the first anniversary of the date of grant.

Read SEC document
April 25, 2017 Filed Apr 26, 2017 19:40 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Tax withholdingCommon Stock 627 $157.42 $98,702.34
Disclosure

SEC source: 0001140361-17-016862 · doc1.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,503

F1 · price: Closing price per share on date of vesting of restricted stock units.

Read SEC document
April 24, 2017 Filed Apr 25, 2017 20:55 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Tax withholdingCommon Stock 707 $156.17 $110,412.19
Disclosure

SEC source: 0001140361-17-016736 · doc1.xml · nonDerivative · entry 2

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,130

F1 · price: Closing price per share on date of vesting of restricted stock units.

Read SEC document
April 22, 2017 Filed Apr 25, 2017 20:55 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Tax withholdingCommon Stock 679 $153.11 $103,961.69
Disclosure

SEC source: 0001140361-17-016736 · doc1.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,837

F1 · price: Closing price per share on date of vesting of restricted stock units.

Read SEC document
January 10, 2017 Filed Jan 11, 2017 13:44 UTC LITTELFUSE INC /DE LFUS · Entity 3514 Tax withholdingCommon Stock 707 $150.45 $106,368.15
Disclosure

SEC source: 0001643464-17-000003 · primary_doc.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,516

F1 · price: Closing price per share on date of vesting of restricted stock.

Read SEC document
January 03, 2017 Filed Jan 4, 2017 16:38 UTC LITTELFUSE INC /DE LFUS · Entity 3514 GrantCommon Stock 6,963 $0.00 $0.00
Disclosure

SEC source: 0001643464-17-000002 · primary_doc.xml · nonDerivative · entry 1

HEINZMANN DAVID W · CIK 0001279765 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,223

F1 · shares: Represents the grant of restricted stock units to the reporting person under the Littelfuse Long Term Incentive Plan. The grant vests 100% on January 3, 2020.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.