UNITED STATES SECURITIES AND EXCHANGE COMMISSION FORM 10-K For the Fiscal Year Ended December 31, 2020 PROTECTIVE INSURANCE CORPORATION Washington, D.C. 20549 ☒ ☐ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 OR For the transition period from ______ to ______ Commission file number: 0-5534 (Exact Name of Registrant as Specified in Its Charter) 35-0160330 (I.R.S. Employer Identification No.) 46032 (Zip Code) Indiana (State or Other Jurisdiction of Incorporation or Organization) 111 Congressional Boulevard, Carmel, Indiana (Address of Principal Executive Offices) Registrant's telephone number, including area code:  (317) 636-9800 Securities registered pursuant to Section 12(b) of the Act: Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes  ☐  No  ☒ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes  ☐  No  ☒ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes  ☒  No  ☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes  ☒  No  ☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act. Large accelerated filer  ☐ Non-accelerated filer  ☐ Accelerated filer  ☒ Smaller reporting company  ☐ Emerging growth company  ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐ Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.  ☒ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes  ☐  No  ☒ The aggregate market value of Class A and Class B Common Stock held by non-affiliates of the Registrant as of June 30, 2020, based on the closing trade prices on that date, was approximately $149,681,000. The number of shares outstanding of each of the issuer's classes of common stock as of March 8, 2021: Common Stock, No Par Value: Class A (voting) 2,603,350  Class B (nonvoting) 11,552,801  14,156,151  DOCUMENTS INCORPORATED BY REFERENCE Portions of the Proxy Statement for the Annual Meeting of Shareholders to be held on May 4, 2021 are incorporated by reference into Part III of this Annual Report on Form 10-K. Title of each class Trading Symbol(s) Name of each exchange on which registered Class A Common Stock, No Par Value PTVCA The Nasdaq Stock Market LLC Class B Common Stock, No Par Value PTVCB The Nasdaq Stock Market LLC