Matheis Dennis

SEC source: 0001104659-26-111347 · tm2626098-2_4seq1.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 87,026

F1 · date: The restricted share award shall vest on the second anniversary of the grant date.

SEC source: 0001104659-26-087626 · tm2621505-1_4seq1.xml · nonDerivative · entry 2

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,026

F3 · date: The reported shares were acquired pursuant to a Securities Purchase Agreement with the issuer, dated July 22, 2026, at a purchase price of $6.93 per share.

SEC source: 0001094891-26-000217 · form4.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,033,443

F1 · price: The price reported in Column 4 is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $0.9375 to $1.0200, 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 range set forth herein.

SEC source: 0001094891-26-000080 · form4.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 788,443

F1 · shares: Represents restricted stock granted to the reporting person under the Issuer's 2018 Equity Plan with a single vesting date of May 20, 2029. Such restricted stock is subject to forfeiture if the requisite service period is not completed

SEC source: 0001104659-25-089996 · tm2526001-3_4seq1.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,631

F1 · date: The restricted share award shall vest on the last day of the second-year anniversary after the grant date.

F2 · balance_after: The number of shares beneficially owned reflects the 20-for-1 reverse stock split effected on August 28, 2025.

SEC source: 0001062993-25-014853 · form4.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 665,443

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.0085 to $1.0286. inclusive. The reporting person undertakes to provide to Lucid Diagnostics Inc., any security holder of Lucid Diagnostics Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

SEC source: 0001062993-25-010111 · form4.xml · nonDerivative · entry 3

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 350,000

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.305 to $1.32, inclusive.

SEC source: 0001062993-25-010245 · form4a.xml · nonDerivative · entry 3

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 565,443

F3 · price: The price reported in Column 4 is a weighted average price. These shares were acquired in multiple transactions at prices ranging from $1.305 to $1.32, inclusive.

SEC source: 0001062993-25-010111 · form4.xml · nonDerivative · entry 2

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 316,782

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.315 to $1.32, inclusive.

SEC source: 0001062993-25-010245 · form4a.xml · nonDerivative · entry 2

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 532,225

F2 · price: The price reported in Column 4 is a weighted average price. These shares were acquired in multiple transactions at prices ranging from $1.315 to $1.32, inclusive.

SEC source: 0001062993-25-010111 · form4.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 187,098

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.265 to $1.30. inclusive. The reporting person undertakes to provide to Lucid Diagnostics Inc., any security holder of Lucid Diagnostics Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (2) and (3) to this Form4.

SEC source: 0001062993-25-010245 · form4a.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 402,541

F1 · price: The price reported in Column 4 is a weighted average price. These shares were acquired in multiple transactions at prices ranging from $1.265 to $1.30. inclusive. The reporting person undertakes to provide to Lucid Diagnostics Inc., any security holder of Lucid Diagnostics Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares acquired at each separate price within the ranges set forth in footnotes (1), (2) and (3) to this Form4.

F4 · ownership.direct: Includes 52,718 shares of Lucid common stock distributed on a pro rata basis to the reporting person by a limited partnership of which the reporting person is a limited partner.

SEC source: 0001062993-25-003184 · form4.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 162,725

F1 · shares: Represents restricted stock granted to the reporting person under the Issuer's 2018 Equity Plan with a single vesting date of May 20, 2028. Such restricted stock is subject to forfeiture if the requisite service period is not completed

SEC source: 0001104659-26-087626 · tm2621505-1_4seq1.xml · derivative · entry 3

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 965 shares

Expires 2024-08-04

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: 0001104659-26-087626 · tm2621505-1_4seq1.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,596

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 · date: Pursuant to its terms, the Series B Preferred Stock automatically converted into shares of common stock, subject to certain beneficial ownership limitations, including a non-waivable 19.99% ownership blocker, on the 15-month anniversary of the issuance date.

F2 · shares: The Reporting Person's 50 shares of Series B-2 Preferred Stock automatically converted into 19,289 shares of Common Stock on August 12, 2024. Following the Issuer's subsequent reverse stock split, the conversion shares are reported as 965 shares of Common Stock. The Reporting Person also received shares of Common Stock pursuant to the dividend provisions applicable to the Series B Preferred Stock. After giving effect to the reverse stock split and such dividend shares, the Reporting Person beneficially owned 28,596 shares of Common Stock immediately following the conversion.

F2 · price: The Reporting Person's 50 shares of Series B-2 Preferred Stock automatically converted into 19,289 shares of Common Stock on August 12, 2024. Following the Issuer's subsequent reverse stock split, the conversion shares are reported as 965 shares of Common Stock. The Reporting Person also received shares of Common Stock pursuant to the dividend provisions applicable to the Series B Preferred Stock. After giving effect to the reverse stock split and such dividend shares, the Reporting Person beneficially owned 28,596 shares of Common Stock immediately following the conversion.

F2 · balance_after: The Reporting Person's 50 shares of Series B-2 Preferred Stock automatically converted into 19,289 shares of Common Stock on August 12, 2024. Following the Issuer's subsequent reverse stock split, the conversion shares are reported as 965 shares of Common Stock. The Reporting Person also received shares of Common Stock pursuant to the dividend provisions applicable to the Series B Preferred Stock. After giving effect to the reverse stock split and such dividend shares, the Reporting Person beneficially owned 28,596 shares of Common Stock immediately following the conversion.

SEC source: 0001062993-24-009828 · form4.xml · derivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 241,500

Underlying: Common stock · 241,500 shares

Expires 2034-05-08

F1 · derivative.exercise_date: One third of the option vests on December 31, 2024; the balance vests in eight equal quarterly installments, starting March 31, 2025.

SEC source: 0001104659-24-032405 · tm248350-2_4seq1.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 152,620

F1 · date: The shares vest as follows: (i) 50% vest on the grant date and (ii) 50% vest in two instalments on the last day of each successive annual anniversary over a two year period.

SEC source: 0001104659-23-057160 · tm2315002-4_4seq1.xml · derivative · entry 2

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50

Underlying: Common Stock · Not disclosed shares

Expires 2026-05-04

F1 · derivative.expiration_date: The Series B Preferred Stock will automatically convert into shares of common stock, subject to certain beneficial ownership limitations, including a non-waivable 19.99% ownership blocker, on the 15-month anniversary of the issuance date.

F2 · derivative.underlying_shares: The Series B Preferred Stock initially converts into shares of common stock at a conversion price of $3.37. In addition, the holders of Series B Preferred Stock will also be entitled dividends payable as follows: (i) a number of shares of Common Stock equal to five percent (5.0%) of the number of shares of Common Stock issuable upon conversion of the Series B Preferred Stock then held by such holder for each full quarter anniversary of holding for a total of four (4) quarters from the closing date, and (ii) a number of shares of common stock equal to ten percent (10%) of the number of shares of common stock issuable upon conversion of the Series B Preferred Stock then held by such holder on the fifth full quarter from the closing date.

SEC source: 0001104659-22-063445 · tm2216123-2_4seq1.xml · derivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,000

Underlying: Common Stock · 35,000 shares

Expires 2032-05-18

F1 · derivative.exercise_date: The options vest over three years in 12 equal quarterly installments following the grant date, subject to the Reporting Person's continued services to the Issuer.

SEC source: 0001104659-21-006287 · tm213677-3_4seq1.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 82,620

F1 · date: The shares vest over three years as follows: 8.333% shall vest on March 31, 2021, and the remaining shares vest in 11 equal instalments every 3 months thereafter.

SEC source: 0001104659-21-044748 · tm2111379d1_4a.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 82,620

F1 · security: Each RSU represents a contingent right to receive one share of the Issuer's common stock.

F2 · date: The shares vest over three years as follows: one third of the shares vest on each annual anniversary date of the date of grant; provided, however that the shares shall vest on a pro rata basis on the date the Reporting Person's continuous service to the Issuer ceases. The shares shall immediately vest in the event of a change of control that occurs prior to, or within, 60 days of the termination of the Reporting Person's employment or retention with the Issuer.

SEC source: 0001104659-20-097220 · tm2029014d1_4.xml · derivative · entry 2

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Common Stock · 20,000 shares

Expires 2026-08-18

F2 · price: The options will vest over a three years period commencing on August 18, 2020. One third of the options will become fully vested and exercisable on the first anniversary elapsed from the grant date, and the balance will vest in eight equal quarterly installments following the first anniversary of the grant date, subject to the director's continued service as a board member.

F2 · derivative.exercise_date: The options will vest over a three years period commencing on August 18, 2020. One third of the options will become fully vested and exercisable on the first anniversary elapsed from the grant date, and the balance will vest in eight equal quarterly installments following the first anniversary of the grant date, subject to the director's continued service as a board member.

SEC source: 0001104659-20-097220 · tm2029014d1_4.xml · nonDerivative · entry 1

Matheis Dennis · CIK 0001817012 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 65,000

F1 · shares: The reporting person was awarded such securities in conjunction with his appointment as a board member of the registrant.

F1 · price: The reporting person was awarded such securities in conjunction with his appointment as a board member of the registrant.