# EDGAR Filing Document

**Accession Number:** 0001805077
**File Stem:** 0000899243-23-000658
**Filing Date:** 2023-1
**Character Count:** 8991
**Document Hash:** a6a2c9a74dbef612a56f211a4b7ca629
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000899243-23-000658.hdr.sgml**: 20230104

**ACCESSION NUMBER**: 0000899243-23-000658

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20221230

**FILED AS OF DATE**: 20230104

**DATE AS OF CHANGE**: 20230104

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** KOCH INDUSTRIES INC
- **CENTRAL INDEX KEY:** 0000923338
- **STATE OF INCORPORATION:** KS
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39291
- **FILM NUMBER:** 23507907

**BUSINESS ADDRESS:**
- **STREET 1:** 4111 EAST 37TH STREET NORTH
- **CITY:** WICHITA
- **STATE:** KS
- **ZIP:** 67220
- **BUSINESS PHONE:** 3168285500

**MAIL ADDRESS:**
- **STREET 1:** 4111 EAST 37TH STREET NORTH
- **CITY:** WICHITA
- **STATE:** KS
- **ZIP:** 67220
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Wood River Capital, LLC
- **CENTRAL INDEX KEY:** 0001888978
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39291
- **FILM NUMBER:** 23507908

**BUSINESS ADDRESS:**
- **STREET 1:** 4111 E. 37TH STREET N
- **CITY:** WICHITA
- **STATE:** KS
- **ZIP:** 67220
- **BUSINESS PHONE:** 316-828-8310

**MAIL ADDRESS:**
- **STREET 1:** 4111 E. 37TH STREET N
- **CITY:** WICHITA
- **STATE:** KS
- **ZIP:** 67220
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Eos Energy Enterprises, Inc.
- **CENTRAL INDEX KEY:** 0001805077
- **STANDARD INDUSTRIAL CLASSIFICATION:** MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 3920 PARK AVENUE
- **CITY:** EDISON
- **STATE:** NJ
- **ZIP:** 08820
- **BUSINESS PHONE:** (732) 225-8400

**MAIL ADDRESS:**
- **STREET 1:** 3920 PARK AVENUE
- **CITY:** EDISON
- **STATE:** NJ
- **ZIP:** 08820

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** B. Riley Principal Merger Corp. II
- **DATE OF NAME CHANGE:** 20200227

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Wood River Capital, LLC<br><sub>(Last) (First) (Middle)</sub><br>4111 E. 37TH STREET NORTH<br><sub>(Street)</sub><br>WICHITA, KS 67220<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Eos Energy Enterprises, Inc. [ EOSE ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2022-12-30 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [X] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>KOCH INDUSTRIES INC<br><sub>(Last) (First) (Middle)</sub><br>4111 E. 37TH STREET NORTH<br><sub>(Street)</sub><br>WICHITA, KS 67220<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Eos Energy Enterprises, Inc. [ EOSE ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2022-12-30 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [X] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock | 2538261 | D<sup>(1)</sup> |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 5% / 6% Convertible Senior PIK Toggle Notes Due 2026<sup>(2)</sup> | 2021-07-07 | 2026-06-20 | Common Stock | 5458330<sup>(3)</sup> | 20.00<sup>(4)</sup> | D<sup>(1)</sup> |  |

---

### Footnotes:

(1) Wood River Capital, LLC ("Wood River") is beneficially owned by SCC Holdings, LLC ("SCC"), SCC is beneficially owned by KIM, LLC ("KIM"), KIM is beneficially owned by Koch Investments Group, LLC ("KIG"), KIG is beneficially owned by Koch Investments Group Holdings, LLC ("KIGH"), and KIGH is beneficially owned by Koch Industries, Inc. ("Koch Industries"), in each case by means of ownership of all voting equity instruments. Koch Industries, SCC, KIM, KIG, and KIGH may be deemed to beneficially own the shares of common stock of Eos Energy Enterprises, Inc. (the "Issuer") held by Wood River by virtue of (i) Koch Industries' beneficial ownership of KIGH, (ii) KIGH's beneficial ownership of KIG, (iii) KIG's beneficial ownership of KIM, (iv) KIM's beneficial ownership of SCC and (v) SCC's beneficial ownership of Wood River.

(2) On July 6, 2021, Spring Creek Capital, LLC (the "Company") entered into an investment agreement (the "Investment Agreement") with the Issuer relating to the issuance and sale of $100,000,000 in aggregate principal amount of the Issuer's 5%/6% Convertible Senior PIK Toggle Notes due 2026 (the "Notes"). The Notes were issued to Spring Creek on July 7, 2021. As permitted by the Investment Agreement, the Company reissued the Notes pursuant to an indenture with Wilmington Trust, National Association, as trustee, dated as of April 7, 2022, in an aggregate principal amount of $102,900,000, including $2,900,000 principal amount of the Notes representing interest previously paid in kind.  On May 2, 2022, Spring Creek transferred the Notes to Wood River. No consideration was paid by Wood River to Spring Creek in connection with this transfer. The Notes are convertible into shares of the Issuer's common stock at the holder's option at any time until the business day prior to the maturity date.

(3) Represents 5,458,330 shares of the Issuer's common stock issuable to Wood River upon conversion of the $109,166,610 outstanding aggregate principal amount of the Notes held by Wood River, which amount includes $3,179,610 aggregate principal amount of the Notes acquired by Wood River as a result of the Issuer's notification that, in connection with the December 30, 2022 interest payment on the Notes, the Issuer had elected to have all accrued and unpaid interest on the Notes to, but not including, the interest payment date of December 30, 2022 paid-in-kind as an increase to the aggregate principal amount of the Notes.

(4) Represents the effective conversion price per share of the Issuer's common stock based on the initial conversion rate of 49.9910 shares per $1,000 principal amount of the Notes. The conversion price is subject to adjustment upon the occurrence of certain dilutive events such as stock splits and combinations, stock dividends, mergers and spin-offs.

**Signature:** Wood River Capital, LLC /s/ Raffaele G. Fazio, Vice President and Secretary  
**Date:** 2023-01-04

**Signature:** Koch Industries, Inc. /s/ Raffaele G. Fazio, Assistant Secretary  
**Date:** 2023-01-04

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**