York Space Systems Inc. Schedule 13G discloses ownership by AE-related holders and affiliated parties. The filing reports 30,196,088 shares (shared voting/dispositive power) equal to 23.28% of common stock based on May 15, 2026 reporting. The Reporting Persons state they may be deemed to beneficially own an aggregate of 105,542,882 shares, or 81.38%, when potential holdings by Dirk Wallinger and parties to certain Voting Agreements are included; these group attributions are described as conditional and the filers disavow any admission of group membership.
The filing names AeroEquity GP, LLC, AE Industrial Partners funds, Michael Robert Greene and David H. Rowe as Reporting Persons and cites a Director Nomination Agreement and Voting Agreements as the bases for potential aggregated attribution.
Positive
None.
Negative
None.
Insights
Large shared holdings and formal agreements could influence governance outcomes.
The statement shows AeroEquity and AE Holders exercise shared voting and dispositive power over 30,196,088 shares (23.28%). The filing also describes contractual arrangements (Director Nomination Agreement; Voting Agreements) that could lead to aggregated attribution of 105,542,882 shares (81.38%).
These clauses are presented as potential group attributions and the Reporting Persons expressly decline to admit group membership; subsequent public disclosures or proxy materials would clarify whether coordinated voting will occur.
Disclosure signals concentrated ownership but states conditional attribution.
The cover-page figures reference 129,694,458 shares outstanding per a Form 10-Q and show the Reporting Persons’ direct shared interest of 30,196,088 shares. The filing separately lists 11,168,593 shares held by Dirk Wallinger and 64,178,201 shares held under Voting Agreements as context for a larger aggregated position.
Whether this concentration affects board votes or liquidity depends on explicit coordination; the filing frames those linkages as contractual possibilities rather than definitive transfers of control.
Key Figures
Shared voting/dispositive power:30,196,088 sharesPercent of class (direct shared amount):23.28%Potential aggregated beneficial ownership:105,542,882 shares+4 more
7 metrics
Shared voting/dispositive power30,196,088 sharesReported shared power held by AE Holders
Percent of class (direct shared amount)23.28%Calculated using 129,694,458 shares outstanding per Form 10-Q
Potential aggregated beneficial ownership105,542,882 sharesIncludes holdings of Dirk Wallinger and parties to Voting Agreements (conditional)
Percent of class (aggregated)81.38%Aggregate percentage if conditional attributions apply
Shares outstanding used for calculation129,694,458 sharesAs reported in Form 10-Q referenced in the Schedule 13G
Dirk Wallinger beneficial ownership11,168,593 sharesIdentified separately and excluded from reported AE Holder totals
Voting Agreements aggregate64,178,201 sharesAggregate shares held by parties to the Voting Agreements cited in the filing
Key Terms
beneficially own, Rule 13d-5(b) group, Director Nomination Agreement, Voting Agreement, +1 more
5 terms
beneficially ownregulatory
"may be deemed to beneficially own an aggregate of 105,542,882 shares"
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
Rule 13d-5(b) groupregulatory
"may be deemed to be a member of a "group" within the meaning of Rule 13d-5(b)"
Director Nomination Agreementcorporate
"Pursuant to the Director Nomination Agreement, dated as of January 28, 2026"
Voting Agreementcorporate
"an aggregate of 64,178,201 shares ... beneficially owned by parties to voting agreements"
shared dispositive powerregulatory
"Shared Dispositive Power 30,196,088.00"
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
York Space Systems Inc.
(Name of Issuer)
Common Stock, par value $0.0001
(Title of Class of Securities)
987084100
(CUSIP Number)
03/31/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
987084100
1
Names of Reporting Persons
AeroEquity GP, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
30,196,088.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
30,196,088.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
30,196,088.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
23.28 %
12
Type of Reporting Person (See Instructions)
OO
Comment for Type of Reporting Person: Calculated based on 129,694,458 shares of common stock, par value $0.0001 per share ("Common Stock") of York Space System Inc. (the "Issuer") outstanding as reported on the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 15, 2026.
SCHEDULE 13G
CUSIP Number(s):
987084100
1
Names of Reporting Persons
Michael Robert Greene
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
30,196,088.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
30,196,088.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
30,196,088.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
23.28 %
12
Type of Reporting Person (See Instructions)
IN
Comment for Type of Reporting Person: Calculated based on 129,694,458 shares of Common Stock of the Issuer outstanding as reported on the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 15, 2026.
SCHEDULE 13G
CUSIP Number(s):
987084100
1
Names of Reporting Persons
David H. Rowe
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
30,196,088.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
30,196,088.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
30,196,088.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
23.28 %
12
Type of Reporting Person (See Instructions)
IN
Comment for Type of Reporting Person: Calculated based on 129,694,458 shares of Common Stock of the Issuer outstanding as reported on the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 15, 2026.
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
York Space Systems Inc.
(b)
Address of issuer's principal executive offices:
6060 S. Willow Drive, Greenwood Village, CO 80111
Item 2.
(a)
Name of person filing:
This statement is filed by the entities listed below, all of whom together are referred to herein as the "Reporting Persons":
(i) AE Industrial Partners Fund II, LP;
(ii) AE Industrial Partners Fund II-A, LP;
(iii) AE Industrial Partners Fund II-B, LP;
(iv) AE Industrial Partners Fund III, LP;
(v) AE Industrial Partners Fund III-A, LP
(vi) AE Industrial Partners Aerospace Opportunities, LP
(vii) AE Co-Investment Partners Fund III-Y, LP
(viii) AE Co-Investment Partners Fund III Y-2, LP
(ix) AE Industrial PSO Equity Partners, LP;
(x) AE Industrial Partners PBCI Aggregator, LP (together with each of the foregoing, the "AE Holders");
(xi) AeroEquity GP, LLC ("AeroEquity");
(xii) Michael Robert Greene; and
(xiii) David H. Rowe.
(b)
Address or principal business office or, if none, residence:
6700 Broken Sound Pkwy NW, Boca Raton, FL 33487
(c)
Citizenship:
See response to Item 4 on the cover page.
(d)
Title of class of securities:
Common Stock, par value $0.0001
(e)
CUSIP Number(s):
987084100
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
See response to Item 9 on the cover page.
(b)
Percent of class:
See response to Item 11 on the cover page.
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
See response to Item 5 on the cover page.
(ii) Shared power to vote or to direct the vote:
See response to Item 6 on the cover page.
(iii) Sole power to dispose or to direct the disposition of:
See response to Item 7 on the cover page.
(iv) Shared power to dispose or to direct the disposition of:
See response to Item 8 on the cover page.
Each of the AE Holders is ultimately controlled by AeroEquity. AeroEquity is controlled by its managing members, Michael Robert Greene and David H. Rowe. Messrs. Greene and Rowe make all voting and investment decisions with respect to the securities held by AE Industrial Partners. AeroEquity and Messrs. Greene and Rowe may therefore be deemed to have voting and dispositive power over 30,196,088.00 shares of Common Stock directly held by the AE Holders.
The reported amounts do not include 11,168,593 shares of Common Stock beneficially owned by Dirk Wallinger. Pursuant to the Director Nomination Agreement, dated as of January 28, 2026, by and among the Issuer and the stockholders party thereto, the Reporting Persons may be deemed to be a member of a "group" within the meaning of Rule 13d-5(b) and beneficially own securities beneficially owned by Dirk Wallinger. The filing of this Statement shall not be deemed an admission of membership in any such "group" or of beneficial ownership of the securities beneficially owned by Mr. Wallinger, for purposes of Section 13(d) or 13(g) or for any other purpose. The responses to Items 5 through 9 of the cover page to this Statement do not reflect any securities beneficially owned by Mr. Wallinger.
The reported amounts also do not include an aggregate of 64,178,201 shares of Common Stock beneficially owned by parties to voting agreements (the "Voting Agreement"), by and among the Issuer and the stockholders party thereto. Pursuant to the Voting Agreements, the Reporting Persons may be deemed to be a member of a "group" within the meaning of Rule 13d-5(b) and beneficially own securities beneficially owned by the parties to the Voting Agreements. The filing of this Statement shall not be deemed an admission of membership in any such "group" or of beneficial ownership of the securities beneficially owned by such parties, for purposes of Section 13(d) or 13(g) or for any other purpose. The responses to Items 5 through 9 of the cover page to this Statement do not reflect any securities beneficially owned by parties subject to the Voting Agreements.
As a result of the foregoing, the Reporting Persons may be deemed to beneficially own an aggregate of 105,542,882 shares of Common Stock, or 81.38% of shares of Common Stock outstanding.
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
Not Applicable
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
Not Applicable
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
AeroEquity GP, LLC
Signature:
/s/ Michael Robert Greene
Name/Title:
Michael Robert Greene / Authorized Signatory
Date:
05/15/2026
Michael Robert Greene
Signature:
/s/ Michael Robert Greene
Name/Title:
Michael Robert Greene
Date:
05/15/2026
David H. Rowe
Signature:
/s/ David H. Rowe
Name/Title:
David H. Rowe
Date:
05/15/2026
Exhibit Information
Exhibit 1 Joint Filing Agreement, dated as of May 15, 2026.
What ownership stake does AE-related group report in York Space Systems (YSS)?
The filing reports 30,196,088 shares representing 23.28% based on May 15, 2026. It also states a conditional aggregated position of 105,542,882 shares (81.38%) when certain agreements are considered.
Who are the named Reporting Persons in the Schedule 13G for YSS?
The Schedule 13G is filed by AE Industrial Partners funds and affiliates, AeroEquity GP, LLC, and individuals Michael Robert Greene and David H. Rowe, who are identified as controlling members of AeroEquity.
What does the filing say about the Voting Agreements and Dirk Wallinger’s shares?
The filing notes 11,168,593 shares beneficially owned by Dirk Wallinger and an aggregate of 64,178,201 shares held by parties to Voting Agreements; these figures are cited as bases for potential aggregated attribution.
Does the Schedule 13G admit a formal group or control relationship?
No. The Reporting Persons state they "may be deemed" members of a group under Rule 13d-5(b) but explicitly say the filing is not an admission of group membership or beneficial ownership of others’ securities.
What outstanding share count does the filing use to compute percentages for YSS?
Percentages are calculated using 129,694,458 shares outstanding as reported in York Space Systems’ Form 10-Q filed on May 15, 2026, per the filing’s cover-page comment.
