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person · Reporting owner

Thierer Mark

Disclosed activity across 5 companies

Tapewire entity
68874
SEC CIK
0001334925

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
DENTSPLY SIRONA Inc.XRAY · Entity 4448Interim Chief Exec OfficerFebruary 26, 2018February 27, 2018
Discover Financial ServicesDFS · Entity 13531DirectorMay 11, 2023May 15, 2023
P3 Health Partners Inc.PIII · Entity 4562DirectorAugust 06, 2025January 23, 2026
Senior Connect Acquisition Corp. ISNRH · Entity 112401DirectorDecember 10, 2020December 10, 2020
XERIS PHARMACEUTICALS INCXERS · Entity 134906DirectorJune 04, 2020June 04, 2020

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.

DENTSPLY SIRONA Inc.

Report date February 26, 2018 · Filed February 27, 2018

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect103,198 Reported balance After 2018-02-26 transaction · row 1
1 source row

Row 1 · 2018-02-26 · Tax withholding · Disposed 16,128 · Balance 103,198

F1: Shares withheld to cover taxes related to the vesting of the reporting person's RSUs.

Filing footnotes · ownership attribution and instrument terms

F1: Shares withheld to cover taxes related to the vesting of the reporting person's RSUs.

Discover Financial Services

Report date May 11, 2023 · Filed May 15, 2023

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect24,563 Reported balance After 2023-05-11 transaction · row 1
1 source row

Row 1 · 2023-05-11 · Grant · Acquired 1,774 · Balance 24,563

P3 Health Partners Inc.

Report date August 06, 2025 · Filed January 23, 2026 · Amendment

Amendment: balances below belong to this corrected disclosure, not necessarily a complete replacement of earlier positions.

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Class A Common StockSEC Table I · non-derivativeDirect12,662 Reported balance After 2025-08-06 transaction · row 1 Amendment: may correct only part of an earlier disclosure.
1 source row

Row 1 · 2025-08-06 · Grant · Acquired 4,000 · Balance 12,662

F1: Represents a grant of restricted stock units ("RSUs") granted pursuant to the P3 Health Partners Inc. 2021 Incentive Award Plan. Each RSU represents a right to receive one share of Class A common stock. The RSUs vest upon the earlier of the Company's 2026 annual stockholder meeting and the one-year anniversary of the grant date.

F2: This amended Form 4 is being filed to correct Column 5 of Table I, which inadvertently reported the number of securities beneficially owned by the Reporting Person prior to the Company's 1-for-50 reverse stock split, which became effective on April 11, 2025, and excluded certain securities indirectly owned by the Reporting Person. This amended Form 4 is being filed to correct the number of securities beneficially owned by the Reporting Person to reflect the reverse stock split, as well as the Reporting Person's indirect ownership.

Class A Common StockSEC Table I · non-derivativeIndirectAssetBlue Ventures, LLC8,520 Reported balance Holding disclosure · report date 2025-08-06 · row 2 Amendment: may correct only part of an earlier disclosure.
1 source row

Row 2 · Balance 8,520

F2: This amended Form 4 is being filed to correct Column 5 of Table I, which inadvertently reported the number of securities beneficially owned by the Reporting Person prior to the Company's 1-for-50 reverse stock split, which became effective on April 11, 2025, and excluded certain securities indirectly owned by the Reporting Person. This amended Form 4 is being filed to correct the number of securities beneficially owned by the Reporting Person to reflect the reverse stock split, as well as the Reporting Person's indirect ownership.

F3: The Reporting Person and Nasrin Thierer have voting and dispositive power over the securities held by AssetBlue Ventures, LLC.

Filing footnotes · ownership attribution and instrument terms

F1: Represents a grant of restricted stock units ("RSUs") granted pursuant to the P3 Health Partners Inc. 2021 Incentive Award Plan. Each RSU represents a right to receive one share of Class A common stock. The RSUs vest upon the earlier of the Company's 2026 annual stockholder meeting and the one-year anniversary of the grant date.

F2: This amended Form 4 is being filed to correct Column 5 of Table I, which inadvertently reported the number of securities beneficially owned by the Reporting Person prior to the Company's 1-for-50 reverse stock split, which became effective on April 11, 2025, and excluded certain securities indirectly owned by the Reporting Person. This amended Form 4 is being filed to correct the number of securities beneficially owned by the Reporting Person to reflect the reverse stock split, as well as the Reporting Person's indirect ownership.

F3: The Reporting Person and Nasrin Thierer have voting and dispositive power over the securities held by AssetBlue Ventures, LLC.

Senior Connect Acquisition Corp. I

Report date December 10, 2020 · Filed December 10, 2020

This filing explicitly reported no securities owned.

XERIS PHARMACEUTICALS INC

Report date June 04, 2020 · Filed June 04, 2020

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Stock Option (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $4.68 · Expires 2030-06-04Direct11,228 Reported balance After 2020-06-04 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2020-06-04 · Grant · Acquired 11,228 · Balance 11,228

F1: Such options will vest in full upon the earlier to occur of June 4, 2021 or the date of the Company's next annual meeting of stockholders.

Filing footnotes · ownership attribution and instrument terms

F1: Such options will vest in full upon the earlier to occur of June 4, 2021 or the date of the Company's next annual meeting of stockholders.

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
August 06, 2025 Filed Aug 8, 2025 19:18 UTC P3 Health Partners Inc. PIII · Entity 4562 GrantClass A Common Stock 4,000 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-039353 · wk-form4_1754695079.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 437,121

F1 · shares: Represents a grant of restricted stock units ("RSUs") granted pursuant to the P3 Health Partners Inc. 2021 Incentive Award Plan. Each RSU represents a right to receive one share of Class A common stock. The RSUs vest in one year from date of grant.

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August 06, 2025 Filed Jan 23, 2026 18:09 UTC Amendment P3 Health Partners Inc. PIII · Entity 4562 GrantClass A Common Stock 4,000 $0.00 $0.00
Disclosure

SEC source: 0001334925-26-000001 · wk-form4a_1769209769.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,662

F1 · shares: Represents a grant of restricted stock units ("RSUs") granted pursuant to the P3 Health Partners Inc. 2021 Incentive Award Plan. Each RSU represents a right to receive one share of Class A common stock. The RSUs vest upon the earlier of the Company's 2026 annual stockholder meeting and the one-year anniversary of the grant date.

F2 · balance_after: This amended Form 4 is being filed to correct Column 5 of Table I, which inadvertently reported the number of securities beneficially owned by the Reporting Person prior to the Company's 1-for-50 reverse stock split, which became effective on April 11, 2025, and excluded certain securities indirectly owned by the Reporting Person. This amended Form 4 is being filed to correct the number of securities beneficially owned by the Reporting Person to reflect the reverse stock split, as well as the Reporting Person's indirect ownership.

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June 06, 2024 Filed Jun 10, 2024 17:42 UTC P3 Health Partners Inc. PIII · Entity 4562 GrantStock Option (Right to Buy) · Derivative 965,279 $0.00 Strike: $0.55 $0.00
Disclosure

SEC source: 0001628280-24-027579 · wk-form4_1718055703.xml · derivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 965,279

Underlying: Class A Common Stock · 965,279 shares

Expires 2034-06-06

F1 · derivative.exercise_date: The option vests and becomes exercisable on the earlier of (i) June 6, 2025 and (ii) the date of the next annual meeting of the Issuer's stockholders, subject to the Reporting Person's continued service through the applicable vesting date.

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October 23, 2023 Filed Jan 25, 2024 16:17 UTC P3 Health Partners Inc. PIII · Entity 4562 GrantClass A Common Stock 433,121 $0.00 $0.00
Disclosure

SEC source: 0001628280-24-002237 · wk-form4_1706217422.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 433,121

F1 · shares: Represents a grant of restricted stock units ("RSUs") granted pursuant to the P3 Health Partners Inc. 2021 Incentive Award Plan. Each RSU represents a right to receive one share of Class A common stock. The RSUs vest in two substantially equal installments on each of October 23, 2024 and October 23, 2025.

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May 11, 2023 Filed May 15, 2023 16:29 UTC Discover Financial Services DFS · Entity 13531 GrantCommon Stock 1,774 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-029464 · doc4.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,563

Read SEC document
May 19, 2022 Filed May 23, 2022 16:47 UTC Discover Financial Services DFS · Entity 13531 GrantCommon Stock 1,634 $0.00 $0.00
Disclosure

SEC source: 0001209191-22-031351 · doc4.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,789

Read SEC document
March 24, 2022 Filed Mar 28, 2022 17:19 UTC P3 Health Partners Inc. PIII · Entity 4562 GrantStock Option (Right to Buy) · Derivative 200,000 $0.00 Strike: $7.95 $0.00
Disclosure

SEC source: 0001104659-22-038877 · tm2210604-5_4seq1.xml · derivative · entry 2

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 200,000

Underlying: Class A Common Stock · 200,000 shares

Expires 2032-03-24

F2 · derivative.exercise_date: The option vests and becomes exercisable with respect to 1/3 of the shares on each of March 24, 2023; March 24, 2024 and March 24, 2025.

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March 24, 2022 Filed Mar 28, 2022 17:19 UTC P3 Health Partners Inc. PIII · Entity 4562 GrantStock Option (Right to Buy) · Derivative 171,069 $0.00 Strike: $7.95 $0.00
Disclosure

SEC source: 0001104659-22-038877 · tm2210604-5_4seq1.xml · derivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 171,069

Underlying: Class A Common Stock · 171,069 shares

Expires 2032-03-24

F1 · derivative.exercise_date: The option vests and becomes exercisable with respect to 50% of the shares on each of March 24, 2023 and March 24, 2024.

Read SEC document
May 05, 2021 Filed May 6, 2021 20:08 UTC Discover Financial Services DFS · Entity 13531 GrantCommon Stock 1,291 $0.00 $0.00
Disclosure

SEC source: 0001567619-21-009243 · doc1.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,155

Read SEC document
June 04, 2020 Filed Jun 4, 2020 21:02 UTC XERIS PHARMACEUTICALS INC XERS · Entity 134906 GrantStock Option (right to buy) · Derivative 11,228 $0.00 Strike: $4.68 $0.00
Disclosure

SEC source: 0000899243-20-015328 · doc4.xml · derivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,228

Underlying: Common Stock · 11,228 shares

Expires 2030-06-04

F1 · derivative.exercise_date: Such options will vest in full upon the earlier to occur of June 4, 2021 or the date of the Company's next annual meeting of stockholders.

Read SEC document
May 14, 2020 Filed May 18, 2020 19:46 UTC Discover Financial Services DFS · Entity 13531 GrantCommon Stock 3,824 $0.00 $0.00
Disclosure

SEC source: 0000905148-20-000644 · form4.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,864

Read SEC document
September 30, 2019 Filed Oct 2, 2019 17:12 UTC XERIS PHARMACEUTICALS INC XERS · Entity 134906 GrantStock Option (right to buy) · Derivative 19,650 $0.00 Strike: $9.83 $0.00
Disclosure

SEC source: 0000899243-19-024732 · doc4.xml · derivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,650

Underlying: Common Stock · 19,650 shares

Expires 2029-09-30

F1 · derivative.exercise_date: The options will vest monthly over three years, subject to continued service as a director through such vesting date.

Read SEC document
May 16, 2019 Filed May 20, 2019 16:23 UTC Discover Financial Services DFS · Entity 13531 GrantCommon Stock 1,920 $0.00 $0.00
Disclosure

SEC source: 0001209191-19-031381 · doc4.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,040

Read SEC document
May 02, 2018 Filed May 4, 2018 16:15 UTC Discover Financial Services DFS · Entity 13531 GrantCommon Stock 1,985 $0.00 $0.00
Disclosure

SEC source: 0001209191-18-028096 · doc4.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,120

Read SEC document
February 26, 2018 Filed Feb 27, 2018 22:11 UTC DENTSPLY SIRONA Inc. XRAY · Entity 4448 Tax withholdingCommon Stock 16,128 $57.18 $922,199.04
Disclosure

SEC source: 0001127602-18-008773 · form4.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Interim Chief Exec Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 103,198

F1 · shares: Shares withheld to cover taxes related to the vesting of the reporting person's RSUs.

Read SEC document
January 12, 2018 Filed Jan 16, 2018 22:36 UTC DENTSPLY SIRONA Inc. XRAY · Entity 4448 GrantCommon Stock 56.184 $0.00 $0.00
Disclosure

SEC source: 0001127602-18-001877 · form4.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Interim Chief Exec Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 119,325.933

F1 · shares: Represents dividends on restricted stock units (RSUs) awarded to the Reporting Person in the form of additional RSUs and are subject to the same vesting terms as the underlying awards. The dividends vest simultaneously with the RSUs to which they relate. Each RSU converts to common stock on a 1:1 basis.

Read SEC document
November 13, 2017 Filed Nov 14, 2017 21:25 UTC DENTSPLY SIRONA Inc. XRAY · Entity 4448 PurchaseCommon Stock 77,000 $66.04 $5,084,741.20
Disclosure

SEC source: 0001127602-17-032040 · form4.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Interim Chief Exec Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 119,269.749

F1 · price: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $65.31 to $66.21, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

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October 13, 2017 Filed Oct 17, 2017 21:35 UTC DENTSPLY SIRONA Inc. XRAY · Entity 4448 GrantCommon Stock 61.749 $0.00 $0.00
Disclosure

SEC source: 0001127602-17-029966 · form4.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Interim Chief Exec Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,269.749

F1 · shares: Represents dividends on restricted stock units (RSUs) awarded to the Reporting Person in the form of additional RSUs and are subject to the same vesting terms as the underlying awards. The dividends vest simultaneously with the RSUs to which they relate. Each RSU converts to common stock on a 1:1 basis.

Read SEC document
September 28, 2017 Filed Oct 2, 2017 22:42 UTC DENTSPLY SIRONA Inc. XRAY · Entity 4448 GrantCommon Stock 42,208 $0.00 $0.00
Disclosure

SEC source: 0001127602-17-028696 · form4.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Interim Chief Exec Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,208

F1 · shares: This grant consists entirely of Restricted Stock Units (RSUs).

Read SEC document
May 11, 2017 Filed May 12, 2017 16:46 UTC Discover Financial Services DFS · Entity 13531 GrantCommon Stock 2,324 $0.00 $0.00
Disclosure

SEC source: 0001209191-17-032001 · doc4.xml · nonDerivative · entry 1

Thierer Mark · CIK 0001334925 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,135

F1 · shares: Upon vesting, each restricted stock unit is converted into one share of DFS common stock.

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.