U.S. Securities and Exchange Commission Washington, D.C. 20549 Form 10-Q QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 Commission File No. 1-15555 Tengasco, Inc. (Exact name of registrant as specified in its charter) Delaware 87-0267438 (State or other jurisdiction of incorporation or organization) (IRS Employer Identification No.) 8000 E. Maplewood Ave, Suite 130, Greenwood Village, CO 80111 (Address of principal executive of ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 REPORT ON FORM 10-K (Mark one) ☒ Annual Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the fiscal year ended December 31, 2019 or ☐ Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from __________ to __________. Commission File No. 1-15555 TENGASCO, INC. (name of registrant as specified in its charter) | Delaware | 87-0267438 | | --- | - ...

U.S. Securities and Exchange Commission Washington, D.C. 20549 Form 10-Q QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 Commission File No. 1-15555 Tengasco, Inc. (Exact name of registrant as specified in its charter) Delaware 87-0267438 (State or other jurisdiction of incorporation or organization) (IRS Employer Identification No.) 8000 E. Maplewood Ave, Suite 130, Greenwood Village, CO 80111 (Address of principal executiv ...

U.S. Securities and Exchange Commission Washington, D.C. 20549 Form 10-Q QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 Commission File No. 1-15555 Tengasco, Inc. 720-420-4460 (Registrant's telephone number, including area code) (Exact name of registrant as specified in its charter) Delaware 87-0267438 (State or other jurisdiction of incorporation or organization) (IRS Employer Identification No.) 8000 E. Maplewood Ave, Suite 13 ...

U.S. Securities and Exchange Commission Washington, D.C. 20549 Form 10-Q QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 Commission File No. 1-15555 Tengasco, Inc. (Exact name of registrant as specified in its charter) Delaware 87-0267438 (State or other jurisdiction of incorporation or organization) (IRS Employer Identification No.) 8000 E. Maplewood Ave, Suite 130, Greenwood Village, CO 80111 (Address of principal executive of ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 REPORT ON FORM 10-K (Mark one) Commission File No. 1-15555 TENGASCO, INC. (name of registrant as specified in its charter) Delaware 87-0267438 (state or other jurisdiction of Incorporation or organization) 8000 E. Maplewood Ave., Suite 130, Greenwood Village, CO 80111 (Address of Principal Executive Offices) (Zip Code) (I.R.S. Employer Identification No.) Registrant's telephone number, including area code: (720) 420-4460. Securities reg ...