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person · Reporting owner

Mason Christopher

Disclosed activity across 2 companies

Tapewire entity
77965
SEC CIK
0001836440

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Krystal Biotech, Inc.KRYS · Entity 3500DirectorSeptember 14, 2026September 17, 2026
Tectonic Therapeutic, Inc.AVRO · Entity 5328Chief Scientific OfficerJune 10, 2021June 14, 2021

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.

Krystal Biotech, Inc.

Report date September 14, 2026 · Filed September 17, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $340.03 · Expires 2036-09-13Direct1,187 Reported balance After 2026-09-14 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2026-09-14 · Grant · Acquired 1,187 · Balance 1,187

F1: The stock options vest in full on September 14, 2027, subject to continued service on the Company's Board of Directors through such date and to earlier vesting in certain circumstances described in the Company's Non-Employee Director Compensation Policy as in effect on the date of grant.

Restricted Stock UnitsSEC Table II · derivative / convertible securityDirect471 Reported balance After 2026-09-14 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2026-09-14 · Grant · Acquired 471 · Balance 471

F2: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Company's common stock.

F3: The RSUs vest in full on September 14, 2027, subject to continued service on the Company's Board of Directors through such date and to earlier vesting in certain circumstances described in the Company's Non-Employee Director Compensation Policy as in effect on the date of grant.

Filing footnotes · ownership attribution and instrument terms

F1: The stock options vest in full on September 14, 2027, subject to continued service on the Company's Board of Directors through such date and to earlier vesting in certain circumstances described in the Company's Non-Employee Director Compensation Policy as in effect on the date of grant.

F2: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Company's common stock.

F3: The RSUs vest in full on September 14, 2027, subject to continued service on the Company's Board of Directors through such date and to earlier vesting in certain circumstances described in the Company's Non-Employee Director Compensation Policy as in effect on the date of grant.

Tectonic Therapeutic, Inc.

Report date June 10, 2021 · Filed June 14, 2021

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $9.63 · Expires 2031-06-09Direct125,000 Reported balance After 2021-06-10 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2021-06-10 · Grant · Acquired 125,000 · Balance 125,000

F1: 50% of the shares shall vest and become exercisable on June 10, 2023, and the remaining 50% shall vest and become exercisable on June 10, 2024.

Filing footnotes · ownership attribution and instrument terms

F1: 50% of the shares shall vest and become exercisable on June 10, 2023, and the remaining 50% shall vest and become exercisable on June 10, 2024.

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
September 14, 2026 Filed Sep 17, 2026 00:01 UTC Krystal Biotech, Inc. KRYS · Entity 3500 GrantRestricted Stock Units · Derivative 471 $0.00 $0.00
Disclosure

SEC source: 0001836440-26-000002 · wk-form4_1789603304.xml · derivative · entry 2

Mason Christopher · CIK 0001836440 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 471

Underlying: Common Stock · 471 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Company's common stock.

F3 · derivative.exercise_date: The RSUs vest in full on September 14, 2027, subject to continued service on the Company's Board of Directors through such date and to earlier vesting in certain circumstances described in the Company's Non-Employee Director Compensation Policy as in effect on the date of grant.

F3 · derivative.expiration_date: The RSUs vest in full on September 14, 2027, subject to continued service on the Company's Board of Directors through such date and to earlier vesting in certain circumstances described in the Company's Non-Employee Director Compensation Policy as in effect on the date of grant.

Read SEC document
September 14, 2026 Filed Sep 17, 2026 00:01 UTC Krystal Biotech, Inc. KRYS · Entity 3500 GrantStock Option (Right to Buy) · Derivative 1,187 $0.00 Strike: $340.03 $0.00
Disclosure

SEC source: 0001836440-26-000002 · wk-form4_1789603304.xml · derivative · entry 1

Mason Christopher · CIK 0001836440 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,187

Underlying: Common Stock · 1,187 shares

Expires 2036-09-13

F1 · derivative.exercise_date: The stock options vest in full on September 14, 2027, subject to continued service on the Company's Board of Directors through such date and to earlier vesting in certain circumstances described in the Company's Non-Employee Director Compensation Policy as in effect on the date of grant.

Read SEC document
June 30, 2025 Filed Jun 30, 2025 22:09 UTC Krystal Biotech, Inc. KRYS · Entity 3500 GrantStock Option (Right to Buy) · Derivative 5,000 $0.00 Strike: $137.46 $0.00
Disclosure

SEC source: 0001836440-25-000003 · wk-form4_1751321359.xml · derivative · entry 1

Mason Christopher · CIK 0001836440 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Common Stock · 5,000 shares

Expires 2035-06-30

F1 · derivative.exercise_date: The options were awarded on June 30, 2025 and vest in equal monthly tranches over a one-year period.

Read SEC document
June 30, 2024 Filed Jul 1, 2024 23:32 UTC Krystal Biotech, Inc. KRYS · Entity 3500 GrantStock Option (Right to Buy) · Derivative 5,000 $0.00 Strike: $183.64 $0.00
Disclosure

SEC source: 0001836440-24-000004 · wk-form4_1719876723.xml · derivative · entry 1

Mason Christopher · CIK 0001836440 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Common Stock · 5,000 shares

Expires 2034-06-30

F1 · derivative.exercise_date: The options were awarded on June 30, 2024 and vest in equal monthly tranches over a one-year period.

Read SEC document
June 30, 2023 Filed Jul 3, 2023 20:24 UTC Krystal Biotech, Inc. KRYS · Entity 3500 GrantStock Option (Right to Buy) · Derivative 6,800 $0.00 Strike: $117.40 $0.00
Disclosure

SEC source: 0001711279-23-000053 · wk-form4_1688415856.xml · derivative · entry 1

Mason Christopher · CIK 0001836440 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,800

Underlying: Common Stock · 6,800 shares

Expires 2033-06-30

F1 · derivative.exercise_date: The options were awarded on June 30, 2023 and vest in equal monthly tranches over a one-year period.

Read SEC document
June 30, 2022 Filed Jul 1, 2022 20:09 UTC Krystal Biotech, Inc. KRYS · Entity 3500 GrantStock Option (Right to Buy) · Derivative 6,800 $0.00 Strike: $65.66 $0.00
Disclosure

SEC source: 0001711279-22-000036 · wf-form4_165670614389935.xml · derivative · entry 1

Mason Christopher · CIK 0001836440 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,800

Underlying: Common Stock · 6,800 shares

Expires 2032-06-30

F1 · derivative.exercise_date: The options were awarded on June 30, 2022 and vest in equal monthly tranches over a one-year period.

Read SEC document
June 30, 2021 Filed Jul 2, 2021 15:30 UTC Krystal Biotech, Inc. KRYS · Entity 3500 GrantStock Option (Right to Buy) · Derivative 6,800 $0.00 Strike: $68.00 $0.00
Disclosure

SEC source: 0001711279-21-000016 · wf-form4_162523981348902.xml · derivative · entry 1

Mason Christopher · CIK 0001836440 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,800

Underlying: Common Stock · 6,800 shares

Expires 2031-06-30

F1 · derivative.exercise_date: The options were awarded on June 30, 2021 and vest in equal monthly tranches over a one-year period.

Read SEC document
June 10, 2021 Filed Jun 14, 2021 22:03 UTC Tectonic Therapeutic, Inc. AVRO · Entity 5328 GrantStock Option (Right to Buy) · Derivative 125,000 $0.00 Strike: $9.63 $0.00
Disclosure

SEC source: 0001127602-21-019838 · form4.xml · derivative · entry 1

Mason Christopher · CIK 0001836440 · Chief Scientific Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 125,000

Underlying: Common Stock · 125,000 shares

Expires 2031-06-09

F1 · derivative.exercise_date: 50% of the shares shall vest and become exercisable on June 10, 2023, and the remaining 50% shall vest and become exercisable on June 10, 2024.

Read SEC document
January 04, 2021 Filed Jan 5, 2021 22:07 UTC Krystal Biotech, Inc. KRYS · Entity 3500 GrantStock Option (Right to Buy) · Derivative 13,600 $0.00 Strike: $59.42 $0.00
Disclosure

SEC source: 0000899243-21-000410 · doc4.xml · derivative · entry 1

Mason Christopher · CIK 0001836440 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,600

Underlying: Common Stock · 13,600 shares

Expires 2031-01-04

F1 · derivative.exercise_date: The options were awarded on January 4, 2021 and vest in equal amounts over 36 months.

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.