Krystal Biotech, Inc. 10-Q

ITEM 5. OTHER INFORMATION None. 31 ITEM 6. EXHIBITS Exhibit Number 31.1 Certification of Periodic Report by Chief Executive Officer under Section 302 of the Sarbanes-Oxley Act of 2002. 31.2 Certification of Periodic Report by Chief Accounting Officer under Section 302 of the Sarbanes-Oxley Act of 2002. 32.1 Certification of Chief Executive Officer and Chief Accounting Officer Pursuant to 18 U.S.C. Section 1350 as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 101 Inline XBRL (Extensible Business Reporting Language). The following materials from this Quarterly Report on Form 10-Q for the period ended March 31, 2022, formatted in Inline XBRL: (i) consolidated balance sheets of Krystal Biotech, Inc., (ii) consolidated statements of operations of Krystal Biotech, Inc., (iii) consolidated statements of comprehensive income/(loss) of Krystal Biotech, Inc., (iv) consolidated statements of changes in equity of Krystal Biotech, Inc., (v) consolidated statements of cash flows of Krystal Biotech, Inc. and (vi) notes to consolidated financial statements of Krystal Biotech, Inc. The instance document does not appear in the interactive data file because its XBRL tags are embedded within the Inline XBRL document 104 Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL 32 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. KRYSTAL BIOTECH, INC. (Registrant) Date: May 9, 2022 By: /s/ Krish S. Krishnan Krish S. Krishnan President and Chief Executive Officer (Principal executive officer) By: /s/ Kathryn A. Romano Kathryn A. Romano Chief Accounting Officer (Principal financial and accounting officer) 33