| ☒ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934 |
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| ☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
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| DELAWARE                 | 95-2962743                           |
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| (State of incorporation) | (I.R.S. Employer Identification No.) |

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| PART IV                                             |
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| ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES |
| (b)  Exhibits:                                 |   |   |
|                                                | 3.1 | Restated Certificate of Incorporation of AmBase Corporation (as amended and restated – July 15, 2017).  |
|                                                | 3.2 | By-Laws of AmBase Corporation (as amended through March 15, 1996).  |
|                                                | 4 | Rights Agreement dated as of February 10, 1986 between the Company and American Stock Transfer and Trust Co. as amended through November 10, 2015.  |
|                                                | 10.4 | Employment Agreement dated as of March 30, 2006 between Richard A. Bianco and the Company, (incorporated by reference to Exhibit 10H to the Company's Annual Report on Form 10-K for the year ended December 31, 2005).  |
|                                                | 10.5 | Amendment to Employment Agreement dated as of January 1, 2008 between Richard A. Bianco and the Company, (incorporated by reference to Exhibit 10E to the Company's Annual Report on Form 10-K for the year ended December 31, 2007)  |
|                                                | 10.6 | Amendment to Employment Agreement between Richard A. Bianco and the Company extending term of employment to May 31, 2023.  |
|                                                | 10.7 | 111 West 57th Partners LLC Limited Liability Company Agreement.  Dated as of June 28, 2013, (incorporated by reference to Exhibit 10.1 to Amendment no. 1 to the Company's Quarterly Report on Form 10-Q/A for the quarterly period ended June 30, 2013).  |
|                                                | 10.8 | Second Amended and Restated Limited Liability Company Agreement of 111 West 57th Investment, LLC dated December 19, 2014 (incorporated by reference to Exhibit 10.8 to the Company's Annual Report on Form 10-K for the year ended December 31, 2014). |
|                                                | 10.9 | Agreement between Mr. Richard A. Bianco, the Company's Chairman President and Chief Executive Officer ("R. A. Bianco") and the Company for Mr. R. A. Bianco to provide to the Company a financial commitment in the form of a line of credit up to ten million dollars ($10,000,000) or additional amount(s) as may be necessary and agreed to enable AmBase to contribute capital to the 111 West 57th Property (incorporated by reference to Exhibit 10.9 to the Company's Annual Report on Form 10-K for the annual period ending December 31, 2016).  |
|                                                | 10.10 | Litigation Funding Agreement dated September 2017, between Mr. Richard A. Bianco, the Company's Chairman, President and Chief Executive Officer ("Mr. R. A. Bianco") and the Company (incorporated by reference to Exhibit 10.1 to the Company's Current report on Form 8-K dated September 26, 2017 and Exhibit 10.3 to the Company's Quarterly Report on Form 10-Q for the quarterly period ending September 30, 2017).  |
|                                                | 10.11 | Contract for sale of real estate owned dated January 17, 2018, between the Company's wholly-owned subsidiary, Maiden Lane Associates, Ltd. and Maria USA, filed herewith. |
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|                                                | 14 | AmBase Corporation - Code of Ethics as adopted by Board of Directors (incorporated by reference to Exhibit 14 to the Company's Annual Report on Form 10-K for the year ended December 31, 2003).  |
|                                                | 21 | Subsidiaries of the Registrant. |
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|                                                | 31.1* | Rule 13a-14(a) Certification of Chief Executive Officer Pursuant to Rule 13a-14.  |
|                                                | 31.2* | Rule 13a-14(a) Certification of Chief Financial Officer Pursuant to Rule 13a-14.  |
|                                                | 32.1 | Section 1350 Certification of Chief Executive Officer pursuant to Rule 18 U.S.C. Section 1350.  |
|                                                | 32.2 | Section 1350 Certification of Chief Financial Officer pursuant to Rule 18 U.S.C. Section 1350.  |
|                                                | 99.1 | August 31, 2012, Supervisory Goodwill Settlement Agreement (originally filed as Exhibit 99 to the Company's Current Report on Form 8-K filed on October 22, 2012 and incorporated by reference herein).  |
|                                                | 101.1 | The following financial statements from AmBase Corporation's Annual Report on Form 10-K for the year ended December 31, 2017 formatted in XBRL:  (i) Consolidated Statement of Operations; (ii) Consolidated Balance Sheets; (iii) Consolidated Statements of Cash Flow: and (iv) Notes to Consolidated Financial Statements. |

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| Signatures                                                                                                                                                                                                                                               |   |   |
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| Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this Amendment No. 1 to Report on Form 10-K/A to be signed on its behalf by the undersigned, thereunto duly authorized.  |
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| AMBASE CORPORATION                                                                                                                                                                                                                                       |   |   |
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| /s/JOHN FERRARAVice President and Chief FinancialOfficer (Principal Financial Officer)Date:  April 30, 2018                                                                                                                                         |   |   |
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