Washington, D.C. 20549


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
Krishnan Suma

(Last) (First) (Middle)


(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Krystal Biotech, Inc. [ KRYS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director X 10% Owner
X Officer (give title below) Other (specify below)
President, R&D
3. Date of Earliest Transaction (Month/Day/Year)
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 02/26/2023 F 3,057(1) D $78.46(2) 1,674,206 D
Common Stock 1,738,688 I By Spouse(3)
Common Stock 90,000 I By SMK Trust
Common Stock 50,000 I By Krishnan Family Trust(4)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy) $81.91 02/28/2023 A 30,000 (5) 02/28/2033 Common Stock 30,000 $0 30,000 D
Performance Stock Units (6) 02/28/2023 A 15,000(7) (8) (9) Common Stock 15,000(7) $0 15,000(7) D
Explanation of Responses:
1. Represents tax withholding upon the vesting of 7,100 shares of restricted stock on February 26, 2023.
2. The closing price on February 24, 2023 of the Company's common stock on NASDAQ.
3. Directly beneficially owned by Krish S. Krishnan, the spouse of the Reporting Person.
4. Directly beneficially owned by the Krishnan Family Trust. The Reporting Person and her spouse are each joint beneficial owners of the trust with joint voting and investment control.
5. The option vests in four equal annual installments beginning on February 28, 2024.
6. Each performance stock unit ("PSU") represents a contingent right to receive one share of the Company's common stock, subject to the achievement of certain corporate performance criteria during the year ended December 31, 2023, as approved by the Company's Compensation Committee, and the Reporting Person's continued service to the Company on each applicable vesting date following such achievement.
7. The number of PSUs in this column represents the number of shares of common stock the Reporting Person will receive assuming achievement of all of the corporate performance criteria set by the Company's Compensation Committee for this award.
8. If any applicable portion of the performance criteria have been achieved, the award shall vest in two equal annual installments (February 28, 2024 and February 28, 2025).
9. If the performance criteria are not achieved, the portion of the award which was capable of vesting on that date will expire.
/s/ Suma Krishnan 02/28/2023
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.