| 2026-08-06 | 8-K | 10.4 | Third Amendment to Loan Guarantee Agreement, dated August 4, 2026, by and between the Company and the United States Department of Energy |
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| 2026-08-06 | 8-K | 10.3 | Side Letter dated August 4, 2026 by and between Eos Energy Enterprises, Inc., CCM Frontier JV Holdco, LLC, and Frontier Power USA Parent, LLC. |
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| 2026-08-06 | 8-K | 10.2 | Contribution and Warrants Issuance Agreement dated August 4, 2026 by and between Eos Energy Enterprises, Inc. and Frontier Power USA Parent, LLC. |
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| 2026-08-06 | 8-K | 10.1 | Amended and Restated Limited Liability Company Agreement dated August 4, 2026 by and among Eos Energy Enterprises, Inc., CCM Frontier JV Holdco, LLC and HBC MSF Capital Solutions Blocker II LLC. |
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| 2026-08-05 | 10-Q | 10.5 | Third Amendment to Loan Guarantee Agreement, dated August 4, 2026, by and between Eos Energy Enterprises, Inc. and the United States Department of Energy |
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| 2026-08-05 | 10-Q | 10.4 | Limited Consent and Waiver to Loan Guarantee Agreement, dated June 29, 2026 by and between Eos Energy Enterprises, Inc. and the United States Department of Energy |
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| 2026-08-05 | 10-Q | 10.3 | Limited Consent and Waiver to Loan Guarantee Agreement, dated June 26, 2026, by and between Eos Energy Enterprises, Inc. and the United States Department of Energy |
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| 2026-08-05 | 10-Q | 10.2 | Limited Consent to Loan Guarantee Agreement, dated April 1, 2026, by and between Eos Energy Enterprises, Inc. and the United States Department of Energy |
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| 2026-04-30 | 8-K | 10.1 | Employment Agreement, dated April 28, 2026, by and between the Company and Alessandro Lagi |
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| 2026-03-31 | 8-K | 10.1 | Employment Agreement dated March 30, 2026 |
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| 2026-02-26 | 10-K | 10.45 | Limited Consent to Loan Guarantee Agreement, dated November 18, 2025, by and between Eos Energy Enterprises, Inc. and the United States Department of Energy |
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| 2026-02-26 | 10-K | 10.44 | Amendment to Loan Guarantee Agreement, dated March 25, 2025, by and between Eos Energy Enterprises, Inc. and the U.S. Department of Energy |
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| 2026-02-17 | 8-K | 10.1 | Second Amendment to Loan Guarantee Agreement, dated February 13, 2026, by and between the Company and the United States Department of Energy |
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| 2025-11-24 | 8-K | 10.1 | SIXTH AMENDMENT TO CREDIT AND GUARANTY AGREEMENT, DATED NOVEMBER 19, 2025, BY AND AMONG THE COMPANY, CCM DENALI DEBT HOLDINGS, LP AND CERBERUS US SERVICING, LLC |
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| 2025-11-18 | 8-K | 10.2 | WARRANT AGREEMENT, DATED NOVEMBER 18, 2025, BY AND BETWEEN THE COMPANY AND THE UNITED STATES DEPARTMENT OF ENERGY |
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| 2025-11-18 | 8-K | 10.1 | FIFTH AMENDMENT TO CREDIT AND GUARANTY AGREEMENT, DATED NOVEMBER 18, 2025, BY AND AMONG THE COMPANY, CCM DENALI DEBT HOLDINGS, LP AND CERBERUS US SERVICING, LLC |
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| 2025-07-30 | 10-Q | 10.5 | Fourth Amendment to Credit and Guaranty Agreement, dated July 29, 2025, by and among the Company, CCM Denali Debt Holdings, LP and Cerberus US Servicing, LLC |
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| 2025-06-02 | 8-K | 10.1 | THIRD AMENDMENT TO CREDIT AND GUARANTY AGREEMENT, DATED MAY 29, 2025, BY AND AMONG THE COMPANY, CCM DENALI DEBT HOLDINGS, LP AND CERBERUS US SERVICING, LLC |
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| 2025-05-29 | 8-K | 10.2 | LIMITED CONSENT TO LOAN GUARANTEE AGREEMENT, DATED MAY 28, 2025, BY AND BETWEEN THE COMPANY AND THE UNITED STATES DEPARTMENT OF ENERGY |
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| 2025-05-29 | 8-K | 10.1 | SECOND AMENDMENT TO CREDIT AND GUARANTY AGREEMENT, DATED MAY 28, 2025, BY AND AMONG THE COMPANY, CCM DENALI DEBT HOLDINGS, LP AND CERBERUS US SERVICING, LLC |
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| 2025-05-06 | 10-Q | 10.3 | First Amendment to Credit and Guaranty Agreement, dated April 30, 2025, by and between Eos Energy Enterprises, Inc. and Cerberus US Servicing, LLC |
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| 2025-03-05 | 8-K | 10.2 | Eos Energy Enterprises, Inc. Short-Term Incentive Compensation Plan |
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| 2025-03-05 | 8-K | 10.1 | Offer Letter, dated March 3, 2025, by and between the Company and Eric Javidi |
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| 2024-12-03 | 8-K | 10.4 | AMENDMENT TO CREDIT AGREEMENT, DATED JUNE 21, 2024, BY AND BETWEEN EOS ENERGY ENTERPRISES, INC. AND CERBERUS CAPITAL MANAGEMENT L.P. |
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| 2024-12-03 | 8-K | 10.3 | LOAN GUARANTEE AGREEMENT, DATED NOVEMBER 26, 2024, BY AND BETWEEN EOS ENERGY ENTERPRISES, INC. AND THE U.S. DEPARTMENT OF ENERGY |
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| 2024-12-03 | 8-K | 10.2 | FUTURE ADVANCE PROMISSORY NOTE OF EOS ENERGY ENTERPRISES, INC., DATED NOVEMBER 26, 2024 |
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| 2024-12-03 | 8-K | 10.1 | NOTE PURCHASE AGREEMENT, DATED NOVEMBER 26, 2024, BY AND AMONG EOS ENERGY ENTERPRISES, INC., THE U.S. DEPARTMENT OF ENERGY AND THE FEDERAL FINANCING BANK |
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| 2024-08-06 | 10-Q | 10.17 | Form of Employee Restricted Stock Unit Award Agreement under the Eos Energy Enterprises, Inc. 2020 Incentive Plan |
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| 2024-08-06 | 10-Q | 10.16 | Form of Executive Restricted Stock Unit Award Agreement under the Eos Energy Enterprises, Inc. 2020 Incentive Plan |
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| 2024-08-06 | 10-Q | 10.15 | Form of Director Option Award Agreement under the Eos Energy Enterprises, Inc. 2020 Incentive Plan |
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| 2024-08-06 | 10-Q | 10.14 | Form of Director Restricted Stock Unit Award Agreement under the Eos Energy Enterprises, Inc. Amended and Restated 2020 Incentive Plan |
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| 2024-08-06 | 10-Q | 10.13 | Form of Employee Performance-Based Restricted Stock Unit Award Agreement under the Eos Energy Enterprises, Inc. Amended and Restated 2020 Incentive Plan |
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| 2024-08-06 | 10-Q | 10.12 | Form of Employee Time-Based Restricted Stock Unit Award Agreement under the Eos Energy Enterprises, Inc. Amended and Restated 2020 Incentive Plan |
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| 2024-07-30 | 8-K | 10.1 | SECOND AMENDED AND RESTATED 2020 INCENTIVE PLAN |
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| 2024-07-29 | 8-K | 10.1 | FORM OF INDEMNIFICATION AGREEMENT FOR PREFERRED STOCK DIRECTORS |
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| 2024-06-24 | 8-K | 10.6 | FORM OF INDEMNIFICATION AGREEMENT FOR PREFERRED STOCK DIRECTORS |
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| 2024-06-24 | 8-K | 10.5 | FORM OF INSURER LETTER AGREEMENT, DATED JUNE 21, 2024, BY AND BETWEEN EOS ENERGY ENTERPRISES, INC. AND ACP POST OAK CREDIT I LLC |
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| 2024-06-24 | 8-K | 10.4 | FORM OF ATLAS PAYOFF LETTER AGREEMENT, DATED JUNE 21, 2024, BY AND BETWEEN EOS ENERGY ENTERPRISES, INC. AND ACP POST OAK CREDIT I LLC |
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| 2024-06-24 | 8-K | 10.3 | FORM OF WARRANT |
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| 2024-06-24 | 8-K | 10.2 | SECURITIES PURCHASE AGREEMENT, DATED JUNE 21, 2024, BY AND BETWEEN EOS ENERGY ENTERPRISES, INC. AND CERBERUS CAPITAL MANAGEMENT L.P |
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| 2024-06-24 | 8-K | 10.1 | CREDIT AGREEMENT, DATED JUNE 21, 2024, BY AND BETWEEN EOS ENERGY ENTERPRISES, INC. AND CERBERUS CAPITAL MANAGEMENT L.P |
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| 2024-05-14 | 10-Q | 10.6 | Third Amendment to the Amended and Restated 2020 Incentive Plan |
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| 2024-03-04 | 10-K | 10.44 | Employment Agreement, dated January 17, 2024, by and between the Company and Michael Silberman |
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| 2024-03-04 | 10-K | 10.43 | Separation Agreement, dated January 19, 2024, by and between the Company and Melissa Berube |
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| 2024-02-01 | 8-K | 10.1 | Pricing Agreement dated January 31, 2024, by and between HI-POWER, LLC and SHP US LLC |
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| 2024-01-09 | 8-K | 10.1 | Amended and Restated Manufacturing Purchase and Supply Agreement dated January 8, 2024, by and between HI-POWER, LLC and TETRA Technologies, Inc. |
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| 2023-08-28 | 8-K | 10.1 | Employment Agreement dated August 27, 2023 |
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| 2023-08-23 | 8-K | 10.2 | Master Supply Agreement, dated August 23, 2023, by and between HI-POWER, LLC and ACRO Automation Systems, Inc. |
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| 2023-08-23 | 8-K | 10.1 | Amendment No. 1 to Sales Agreement, dated August 23, 2023, by and between Eos Energy Enterprises, Inc. and Cowen and Company, LLC |
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| 2023-05-17 | 8-K | 10.1 | FORM OF SECURITIES PURCHASE AGREEMENT, DATED AS OF MAY 15, 2023 |
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| 2023-04-14 | 8-K | 10.1 | FORM OF SECURITIES PURCHASE AGREEMENT, DATED AS OF APRIL 12, 2023 |
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| 2023-04-11 | 8-K | 10.2 | FOURTH SUPPLEMENTAL AGREEMENT, DATED AS OF APRIL 10, 2023, TO THE STANDBY EQUITY PURCHASE AGREEMENT DATED AS OF APRIL 28, 2022 BETWEEN EOS ENERGY ENTERPRISES, INC. AND YA II PN, LTD |
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| 2023-04-11 | 8-K | 10.1 | AMENDMENT NO. 5 DATED AS OF APRIL 10, 2023 TO THE STANDBY EQUITY PURCHASE AGREEMENT DATED AS OF APRIL 28, 2022 BETWEEN EOS ENERGY ENTERPRISES, INC. AND YA II PN, LTD |
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| 2023-03-17 | 8-K | 10.2 | THIRD SUPPLEMENTAL AGREEMENT DATED AS OF MARCH 17, 2023 TO THE STANDBY EQUITY PURCHASE AGREEMENT DATED AS OF APRIL 28, 2022 BETWEEN EOS ENERGY ENTERPRISES, INC. AND YA II PN, LTD |
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| 2023-03-17 | 8-K | 10.1 | AMENDMENT NO. 4 DATED AS OF MARCH 17, 2023 TO THE STANDBY EQUITY PURCHASE AGREEMENT DATED AS OF APRIL 28, 2022 BETWEEN EOS ENERGY ENTERPRISES, INC. AND YA II PN, LTD |
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| 2023-01-23 | 8-K | 10.2 | Employment Agreement dated January 20, 2023 |
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| 2023-01-23 | 8-K | 10.1 | Separation Agreement dated January 20, 2023 |
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| 2023-01-19 | 8-K | 10.2 | LIMITED CONSENT AGREEMENT, DATED AS OF JANUARY 17, 2023, AMONG EOS ENERGY ENTERPRISES, LLC, THE LENDERS PARTY THERETO, AND ACP POST OAK CREDIT I LLC, AS ADMINISTRATIVE AGENT |
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| 2023-01-19 | 8-K | 10.1 | INVESTMENT AGREEMENT, DATED JANUARY 18, 2023, BY AND AMONG EOS ENERGY ENTERPRISES, LLC AND THE PURCHASERS LISTED THEREIN |
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| 2022-12-29 | 8-K | 10.2 | SECOND SUPPLEMENTAL AGREEMENT DATED AS OF DECEMBER 29, 2022 TO THE STANDBY EQUITY PURCHASE AGREEMENT DATED AS OF APRIL 28, 2022 BETWEEN EOS ENERGY ENTERPRISES, INC. AND YA II PN, LTD |
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| 2022-12-29 | 8-K | 10.1 | AMENDMENT NO. 3 DATED AS OF DECEMBER 29, 2022 TO THE STANDBY EQUITY PURCHASE AGREEMENT DATED AS OF APRIL 28, 2022 BETWEEN EOS ENERGY ENTERPRISES, INC. AND YA II PN, LTD |
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| 2022-12-08 | 8-K | 10.1 | Commitment Increase Agreement, dated as of December 7, 2022, by and among Eos Energy Enterprises, Inc., the guarantors party thereto, and ACP Post Oak Credit I LLC. |
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| 2022-11-14 | 8-K | 10.1 | Amendment No. 2 to the Standby Equity Purchase Agreement dated as of November 14, 2022 between Eos Energy Enterprises, Inc. and YA II PN, LTD. |
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| 2022-09-09 | 8-K | 10.1 | Amended Director Compensation Policy |
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| 2022-08-05 | 8-K | 10.2 | Sales Agreement, dated August 5, 2022, by and between Eos Energy Enterprises, Inc. and Cowen and Company, LLC |
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| 2022-08-05 | 8-K | 10.1 | Commitment Increase Agreement, dated as of August 4, 2022, by and among Eos Energy Enterprises, Inc., the guarantors party thereto, ACP Post Oak Credit I LLC, as administrative agent and lender, and certain other lenders party thereto |
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| 2022-08-01 | 10-Q | 10.2 | Joinder to Investment Agreement, dated May 1, 2022 among Eos Energy Enterprises, Inc., Spring Creek Capital, LLC and Wood River Capital, LLC |
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| 2022-08-01 | 8-K | 10.2 | Guarantee and Collateral Agreement, dated as of July 29, 2022, by and among Eos Energy Enterprises, Inc., the other grantors named therein and ACP Post Oak Credit I LLC, as collateral agent. |
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| 2022-08-01 | 8-K | 10.1 | Senior Secured Term Loan Credit Agreement, dated as of July 29, 2022, by and among Eos Energy Enterprises, Inc., the lenders party thereto, and ACP Post Oak Credit I LLC, as administrative agent and collateral agent. |
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| 2022-06-13 | 8-K | 10.2 | SUPPLEMENTAL AGREEMENT DATED AS OF JUNE 13, 2022 TO THE STANDBY EQUITY PURCHASE AGREEMENT DATED AS OF APRIL 28, 2022 BETWEEN EOS ENERGY ENTERPRISES, INC. AND YA II PN, LTD |
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| 2022-06-13 | 8-K | 10.1 | AMENDMENT NO. 1 TO THE STANDBY EQUITY PURCHASE AGREEMENT DATED AS OF APRIL 28, 2022 BETWEEN EOS ENERGY ENTERPRISES, INC. AND YA II PN, LTD |
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| 2022-05-09 | 10-Q | 10.3 | Joinder to Investment Agreement, dated May 1, 2022 among Eos Energy Enterprises, Inc., Spring Creek Capital, LLC and Wood River Capital, LLC |
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| 2022-04-28 | 8-K | 10.1 | Standby Equity Purchase Agreement, dated April 28, 2022, by and between Eos Energy Enterprises, Inc. and YA II PN, Ltd. |
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| 2022-02-14 | 8-K | 10.1 | Employment Letter |
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| 2021-12-14 | 8-K | 10.2 | Employment Agreement dated December 13, 2021 |
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| 2021-12-14 | 8-K | 10.1 | Separation Agreement dated December 13, 2021 |
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| 2021-10-05 | 8-K | 10.2 | Guaranty dated September 30, 2021 |
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| 2021-10-05 | 8-K | 10.1 | Master Equipment Financing Agreement dated September 30, 2021 |
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| 2021-07-07 | 8-K | 10.1 | Investment Agreement, dated as of July 6, 2021, among Eos Energy Enterprises, Inc. and Spring Creek Capital, LLC. |
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| 2021-04-14 | 8-K | 10.1 | Unit Purchase Agreement, dated April 8, 2021 |
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| 2021-03-31 | 8-K | 10.1 | Employment Agreement, dated March 25, 2021 by and between the Company and Sagar Kurada. |
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| 2021-03-12 | 8-K | 10.1 | Offer Letter, dated February 19, 2021 by and between the Company and Jody Markopoulos. |
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| 2020-12-14 | 8-K | 10.3 | DIRECTOR FORM OPTION AWARD AGREEMENT |
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| 2020-12-14 | 8-K | 10.2 | DIRECTOR FORM RESTRICTED STOCK UNIT AWARD AGREEMENT |
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| 2020-12-14 | 8-K | 10.1 | NON-EMPLOYEE DIRECTOR COMPENSATION POLICY |
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| 2020-11-20 | 8-K | 10.13 | FORM OF INDEMNITY AGREEMENT |
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| 2020-11-20 | 8-K | 10.12 | EMPLOYMENT AGREEMENT, DATED JUNE 1, 2020, BY AND BETWEEN THE COMPANY AND MACK TREECE |
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| 2020-11-20 | 8-K | 10.11 | EMPLOYMENT AGREEMENT, DATED JUNE 22, 2020, BY AND BETWEEN THE COMPANY AND JOE MASTRANGELO |
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| 2020-11-20 | 8-K | 10.10 | B. RILEY PRINCIPAL MERGER CORP. II 2020 INCENTIVE PLAN |
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| 2020-11-20 | 8-K | 10.9 | REGISTRATION RIGHTS AGREEMENT, DATED NOVEMBER 16, 2020, BY AND AMONG THE COMPANY AND THE SECURITYHOLDERS PARTY THERETO |
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| 2020-11-20 | 8-K | 10.8 | SPONSOR EARNOUT LETTER |
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| 2020-11-20 | 8-K | 10.7 | FORM OF SUBSCRIPTION AGREEMENT |
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| 2020-09-08 | 8-K | 10.1 | EQUITY COMMITMENT LETTER |
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| 2020-05-22 | 8-K | 10.6 | ADMINISTRATIVE SUPPORT AGREEMENT, DATED MAY 19, 2020, BY AND AMONG THE COMPANY AND B. RILEY CORPORATE SERVICES, INC |
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| 2020-05-22 | 8-K | 10.5 | FORWARD PURCHASE AGREEMENT, DATED MAY 19, 2020, BY AND BETWEEN THE COMPANY AND B. RILEY PRINCIPAL INVESTMENTS, LLC |
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| 2020-05-22 | 8-K | 10.4 | PRIVATE PLACEMENT UNITS PURCHASE AGREEMENT, DATED MAY 19, 2020, BY AND BETWEEN THE COMPANY AND B. RILEY PRINCIPAL SPONSOR CO., LLC |
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| 2020-05-22 | 8-K | 10.3 | REGISTRATION RIGHTS AGREEMENT, DATED MAY 19, 2020, BY AND BETWEEN THE COMPANY, B. RILEY PRINCIPAL SPONSOR CO., LLC AND THE COMPANY'S INDEPENDENT DIRECTORS |
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| 2020-05-22 | 8-K | 10.2 | INVESTMENT MANAGEMENT TRUST AGREEMENT, DATED MAY 19, 2020, BY AND BETWEEN THE COMPANY AND CONTINENTAL STOCK TRANSFER & TRUST COMPANY, AS TRUSTEE |
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| 2020-05-22 | 8-K | 10.1 | LETTER AGREEMENT, DATED MAY 19, 2020, BY AND AMONG THE COMPANY, ITS OFFICERS, ITS DIRECTORS AND B. RILEY PRINCIPAL SPONSOR CO. II, LLC |
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