# EDGAR Filing Document

**Accession Number:** 0002086587
**File Stem:** 0001193125-26-027787
**Filing Date:** 2026-1
**Character Count:** 14158
**Document Hash:** a1f3c1aa4251dcfa554f162777cf245b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-027787.hdr.sgml**: 20260128

**ACCESSION NUMBER**: 0001193125-26-027787

**CONFORMED SUBMISSION TYPE**: S-1MEF

**PUBLIC DOCUMENT COUNT**: 14

**FILED AS OF DATE**: 20260128

**DATE AS OF CHANGE**: 20260128

**EFFECTIVENESS DATE**: 20260128

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Yellowstone Midco Holdings II, LLC
- **CENTRAL INDEX KEY:** 0002086587
- **STANDARD INDUSTRIAL CLASSIFICATION:** GUIDED MISSILES & SPACE VEHICLES & PARTS [3760]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** S-1MEF
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-293028
- **FILM NUMBER:** 26574119

**BUSINESS ADDRESS:**
- **STREET 1:** 1449 7TH STREET, SUITE 425
- **CITY:** DENVER
- **STATE:** CO
- **ZIP:** 80204
- **BUSINESS PHONE:** 720-537-2655

**MAIL ADDRESS:**
- **STREET 1:** 1449 7TH STREET, SUITE 425
- **CITY:** DENVER
- **STATE:** CO
- **ZIP:** 80204

**As filed with the U.S. Securities and Exchange Commission on January 28, 2026.** 

**No. 333-** 

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**FORM S-1** 

**REGISTRATION STATEMENT** 

***UNDER***

***THE SECURITIES ACT OF 1933***

## York Space Systems Inc.
**(Exact name of registrant as specified in its charter)** 

---

| | | |
|:---|:---|:---|
| **Delaware** | **3761** | **39-4190941** |
| **(State or other jurisdiction of**<br> **incorporation or organization)** | **(Primary Standard Industrial**<br> **Classification Code Number)** | **(I.R.S. Employer<br>Identification Number)** |

---

**6060 S Willow Drive** 

**Greenwood Village, CO 80111** 

**720-537-2655** 

**(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)** 

**Dirk Wallinger** 

**Chief Executive Officer** 

**6060 S Willow Drive** 

**Greenwood Village, CO 80111** 

**720-537-2655** 

**(Name, address, including zip code, and telephone number, including area code, of agent for service)** 

***Copies of all communications, including communications sent to agent for service, should be sent to:***

---

| | |
|:---|:---|
| **Robert M. Hayward, P.C.**<br> **Kevin M. Frank**<br> **Ashley Sinclair**<br> **Kirkland & Ellis LLP**<br> **333 West Wolf Point Plaza**<br> **Chicago, IL 60654**<br> **(312) 862-2000** | **Michael Kaplan**<br> **Stephen Byeff**<br> **Steven Glendon**<br> **Davis Polk & Wardwell LLP**<br> **450 Lexington Avenue**<br> **New York, NY 10017**<br> **(212) 450-4000** |

---

**Approximate date of commencement of proposed sale to the public**: As soon as practicable after the effective date of this registration statement.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box: ☐

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☒ 333-291581

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, 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 | ☐ | Accelerated filer | ☐ |
| Non-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 7(a)(2)(B) of the Securities Act. ☐

**This Registration Statement shall become effective upon filing with the Securities and Exchange Commission in accordance with Rule 462(b) under the Securities Act of 1933, as amended.** 

------

**EXPLANATORY NOTE AND** 

**INCORPORATION OF CERTAIN INFORMATION BY REFERENCE** 

This registration statement is being filed with respect to the registration of 2,875,000 additional shares of common stock (which includes 375,000 shares of common stock that may be sold as part of the underwriters' option to purchase additional shares) of York Space Systems Inc., a Delaware corporation, pursuant to Rule 462(b) under the Securities Act of 1933, as amended. The contents of the registration statement on [Form S-1 (File No. 333-291581)](http://www.sec.gov/Archives/edgar/data/2086587/000119312525284187/d941199ds1.htm), initially filed by York Space Systems Inc. (f/k/a Yellowstone Midco Holdings II, LLC) with the U.S. Securities and Exchange Commission (the "Commission") on November 17, 2025, as amended (the "Prior Registration Statement"), and which was declared effective on January 28, 2026, including the exhibits thereto, are incorporated herein by reference.

The additional securities that are being registered for sale are in an amount and at a price that together represent no more than 20% of the maximum aggregate offering price set forth in the Filing Fee Table filed as Exhibit 107 to the Prior Registration Statement.

**CERTIFICATION** 

The registrant hereby (i) undertakes to pay the Commission the filing fee set forth on the Filing Fee Table filed as Exhibit 107 of this registration statement by a wire transfer of such amount as soon as practicable (but no later than the close of business on January 29, 2026) and (ii) certifies that it has sufficient funds in the relevant account to cover the amount of such filing fee.

------

**EXHIBIT INDEX** 

---

| | |
|:---|:---|
| **Exhibit**<br>**No.** | **Description** |
| &nbsp;&nbsp;&nbsp;&nbsp;5.1 | [Opinion of Kirkland & Ellis LLP (filed as Exhibit 5.1 to the Registration Statement on Form S-1 filed by the registrant on January 16, 2026 (File No. 333-291581) and incorporated herein by reference)](http://www.sec.gov/Archives/edgar/data/2086587/000119312526015413/d941199dex51.htm) |
| 23.1 | [Consent of Kirkland & Ellis LLP (included in Exhibit 5.1)](http://www.sec.gov/Archives/edgar/data/2086587/000119312526015413/d941199dex51.htm) |
| 23.2 | [Consent of Grant Thornton LLP, independent registered accounting firm for Yellowstone Midco Holdings, LLC](d30020dex232.htm) |
| 23.3 | [Consent of Grant Thornton LLP, independent registered accounting firm for Yellowstone Midco Holdings II, LLC](d30020dex233.htm) |
| 107 | [Filing Fee Table](d30020dexfilingfees.htm) |

---

------

**SIGNATURES** 

Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized in the City of Greenwood Village, State of Colorado, on January 28, 2026.

---

| | |
|:---|:---|
| **York Space Systems Inc.** | **York Space Systems Inc.** |
| By:<br>| /s/ Dirk Wallinger |
|  | Dirk Wallinger |
|  | *Chief Executive Officer* |

---

------

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

---

| | | |
|:---|:---|:---|
| **Signature** | **Title** | **Date** |
| /s/ Dirk Wallinger<br> Dirk Wallinger | Chief Executive Officer & Director<br> *(Principal Executive Officer*) | January 28, 2026 |
| /s/ Kevin Messerle<br> Kevin Messerle | Chief Financial Officer<br> *(Principal Financial Officer)* | January 28, 2026 |
| /s/ Brian Frantz<br> Brian Frantz | Chief Accounting Officer<br> *(Principal Accounting Officer)* | January 28, 2026 |
| /s/ Kirk Konert<br> Kirk Konert | Director | January 28, 2026 |
| /s/ Andrew Boyd<br> Andrew Boyd | Director | January 28, 2026 |
| /s/ Reggie Brothers<br> Reggie Brothers | Director | January 28, 2026 |
| /s/ Tamra Erwin<br> Tamra Erwin | Director | January 28, 2026 |
| /s/ Tyler Letarte<br> Tyler Letarte | Director | January 28, 2026 |
| /s/ General (RET) James McConville<br> General (RET) James McConville | Director | January 28, 2026 |

---

## Exhibit 23.2

**Exhibit 23.2** 

**CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM** 

We have issued our report dated September 28, 2025, with respect to the consolidated financial statements of Yellowstone Midco Holdings, LLC contained in the Registration Statement on Form S-1, as amended (File No. 333-291581), which is incorporated by reference in this Registration Statement on Form S-1MEF. We consent to the incorporation by reference of the aforementioned report in this Registration Statement, and to the use of our name as it appears under the caption "Experts" in the prospectus incorporated by reference in this Registration Statement.

/s/ GRANT THORNTON LLP

Denver, Colorado

January 28, 2026

## Exhibit 23.3

**Exhibit 23.3** 

**CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM** 

We have issued our report dated November 17, 2025, with respect to the financial statement of Yellowstone Midco Holdings II, LLC contained in the Registration Statement on Form S-1, as amended (File No. 333-291581), which is incorporated by reference in this Registration Statement on Form S-1MEF. We consent to the incorporation by reference of the aforementioned report in this Registration Statement, and to the use of our name as it appears under the caption "Experts" in the prospectus incorporated by reference in this Registration Statement.

/s/ GRANT THORNTON LLP

Denver, Colorado

January 28, 2026

## Ex-Filing

?xml version='1.0' encoding='ASCII'? EX-FILING FEES

---

| |
|:---|
| **Calculation of Filing Fee Tables**  |
| &nbsp;&nbsp;&nbsp;&nbsp;**S-1**  |
| &nbsp;&nbsp;&nbsp;&nbsp;**Yellowstone Midco Holdings II, LLC**  |

---

---

| | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | | **Security Type**  | **Security Class Title**  | **Fee Calculation or Carry Forward Rule**  | **Amount Registered**  | **Proposed Maximum Offering Price Per Unit**  | **Maximum Aggregate Offering Price**  | **Fee Rate**  | **Amount of Registration Fee**  |
| **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** | **Newly Registered Securities** |
| Fees to be Paid | 1 | Equity | Common Stock, par value $0.0001 per share | 457(a) | 2875000 | $34.00 | $97750000.00 | 0.0001381 | $13499.27 |
| Fees Previously Paid |  |  |  |  |  |  |  |  |  |
| **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** | **Carry Forward Securities** |
| Carry Forward Securities |  |  |  |  |  |  |  |  |  |
|  |  |  | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: |  | $97750000.00  |  | $13499.27  |
|  |  |  | Total Fees Previously Paid:  | Total Fees Previously Paid:  | Total Fees Previously Paid:  |  |  |  | $0.00  |
|  |  |  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  |  |  |  | $0.00  |
|  |  |  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  |  |  |  | $13499.27  |

---

 **Offering Note** <br>

<sup>1</sup> (1) Represents only the additional number of shares being registered pursuant to this registration statement and includes 375,000 shares of common stock that the underwriters have the option to purchase. Does not include the 18,400,000 shares that were previously registered on the Registration Statement on Form S-1 (File No. 333-291581), as amended (the "Prior Registration Statement"). (2) Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act of 1933, as amended (the "Securities Act"). (3) The registration fee is calculated in accordance with Rule 457(a) under the Securities Act, based on the maximum aggregate offering price. The registrant previously registered 18,400,000 shares of its common stock with an aggregate offering price not to exceed $625,600,000.00 on the Prior Registration Statement, which was declared effective by the U.S. Securities and Exchange Commission on January 28, 2026. In accordance with Rule 462(b) under the Securities Act, an additional amount of securities having a maximum aggregate offering price of $97,750,000.00 is hereby registered, which includes shares of common stock that the underwriters have the option to purchase.

---

| | |
|:---|:---|
| | |
| **Rules 457(b) and 0-11(a)(2)** | **Rules 457(b) and 0-11(a)(2)** |
| Fee Offset Claims | N/A |
| Fee Offset Sources | N/A |
| **Rule 457(p)** | **Rule 457(p)** |
| Fee Offset Claims | N/A |
| Fee Offset Sources | N/A |

---

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| | **Security Type**  | **Security Class Title**  | **Amount of Securities Previously Registered**  | **Maximum Aggregate Offering Price of Securities Previously Registered**  | **Form Type**  | **File Number**  | **Initial Effective Date**  |
| N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A |

---