YSS on NYSE

York Space Systems Inc.

American guided missiles and space vehicles and parts company based in Denver.

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Last updated Oct 18, 2026.

Overview

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TickerYSS on NYSE
IndustryGuided Missiles & Space Vehicles & Parts
HeadquartersDenver, United States
Incorporated inDE²
Business address6060 S Willow Dr., Greenwood Village, Co 80111²
Filer categoryNon-accelerated filer, Emerging growth company²

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Leadership

Who has led York Space Systems Inc., and when. Pick a name to see everywhere that person has worked.

Chief executive

Dirk Wallinger2026–now

Chief financial officer

Kevin Messerle2026–now

Chief executive officerDirk Wallinger Jan 29, 2026 to now⁵
Chief financial officerKevin Messerle Jan 29, 2026 to now⁶

Board members and other officers (10)

Chief Supply Chain OfficerDevjyoti Rudra Jan 29, 2026 to now⁷
OfficerMonica J. Palko Jan 29, 2026 to now⁸
Chief Accounting OfficerBrian D. Frantz Feb 3, 2026 to now⁹
Board memberDirk Wallinger Jan 29, 2026 to now⁵
Board memberJames McConville Jan 29, 2026 to now¹⁰
Board memberKirk Michael Konert Jan 29, 2026 to now¹¹
Board memberLouis R. Brothers Jr. Jan 29, 2026 to now¹²
Board memberTami Erwin Jan 29, 2026 to now¹³
Board memberTyler Letarte Jan 29, 2026 to now¹⁴
Board memberJanine Davidson Apr 14, 2026 to now¹⁵

Former names

Yellowstone Midco Holdings II, LLCSep 29, 2025 to Feb 3, 2026²

Timeline

Jan 29, 2026New chief executive Dirk Wallinger becomes CEO⁵
Jan 7, 2012Founded York Space Systems Inc. is founded¹⁶

Filings

72 filings to the SEC since October 2021: 1 annual reports, 2 quarterly reports, 10 major events, 36 insider forms, 4 large holders, 19 other. The latest 20:

Aug 14, 202610-Q EDGAR
Aug 14, 2026SCHEDULE 13G/A EDGAR
Aug 13, 20268-K EDGAR
Aug 10, 20264 PRIMARY DOCUMENT EDGAR
Aug 10, 20264/A PRIMARY DOCUMENT EDGAR
Aug 6, 20264 PRIMARY DOCUMENT EDGAR
Aug 5, 20268-K EDGAR
Aug 4, 20264 PRIMARY DOCUMENT EDGAR
Jul 31, 20264 PRIMARY DOCUMENT EDGAR
Jul 10, 20264 OWNERSHIP DOCUMENT EDGAR
Jun 29, 20264/A OWNERSHIP DOCUMENT EDGAR
Jun 5, 20264 OWNERSHIP DOCUMENT EDGAR
Jun 4, 20268-K/A EDGAR
May 19, 20268-K EDGAR
May 15, 202610-Q EDGAR
May 15, 2026SCHEDULE 13G EDGAR
May 15, 2026SCHEDULE 13G EDGAR
May 14, 20268-K EDGAR
Apr 29, 2026SCHEDULE 13G EDGAR
Apr 29, 20268-K EDGAR

The 72 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last three years, summarized. The full record is on SEC EDGAR.

Insider trades and holders

Large holders

Investors who own more than 5% must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively. 4 such filings since October 2021:

From Forms 4 and Schedules 13D and 13G filed with the SEC.

Held by these funds

The largest holders among investment managers' 13F reports for the quarter ending Jun 30, 2026, the top 25 of 100. Change is in shares since the quarter before.

Fund	Shares	Value	Share of the fund	Change
BlackRock, Inc.	19,212,689	$473.0M	0.0%	+200,250
Ae Industrial Partners, LP	11,728,057	$288.7M	21.1%	+430,134
Allianz Asset Management GmbH	2,726,783	$67.1M	0.1%	No change
Hood River Capital Management LLC	1,963,942	$48.4M	0.4%	+975,432
Tema ETFs LLC	1,904,718	$46.9M	1.5%	+1,903,558
Tidal Investments LLC	1,843,269	$45.4M	0.1%	New
Westwood Holdings Group Inc	1,736,906	$42.8M	0.3%	+1,327,720
Voya Investment Management LLC	1,618,318	$39.8M	0.0%	+540,708
UBS Group AG	1,512,752	$37.2M	0.0%	+458,908
State Street Corp	1,433,938	$35.3M	0.0%	+1,087,889
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	1,369,727	$33.7M	0.0%	+1,361,373
Clearbridge Investments, LLC	1,318,391	$32.5M	0.0%	−27,063
Temasek Holdings (Private) Ltd	1,027,774	$25.3M	0.1%	+577,774
Systematic Financial Management LP	961,190	$23.7M	0.5%	+504,266
Vanguard Capital Management LLC	844,079	$20.8M	0.0%	+4,615
Vanguard Portfolio Management LLC	820,963	$20.2M	0.0%	+33,549
Frontier Capital Management Co LLC	733,025	$18.0M	0.2%	New
Burkehill Global Management, LP	668,705	$16.5M	0.6%	No change
Sei Investments Co	632,624	$15.6M	0.0%	+217,168
ExodusPoint Capital Management, LP	570,784	$14.1M	0.1%	−22,338
Allspring Global Investments Holdings, LLC	557,306	$13.7M	0.0%	−174,945
Granahan Investment Management, LLC	468,190	$11.5M	0.4%	−499,420
Geode Capital Management, LLC	459,686	$11.3M	0.0%	+31,606
Schroder Investment Management Group	465,145	$11.2M	0.0%	−20,311
Morgan Stanley	386,542	$9.5M	0.0%	+102,879

13F reports cover disclosed long positions in U.S. stocks only.

Sources

The numbers on this page point here. Each one links to the record it came from.

1
SEC EDGARYork Space Systems Inc. filings on SEC EDGAR
2
SEC EDGARYork Space Systems Inc. filings on SEC EDGAR
3
SEC EDGARYork Space Systems Inc. 10-Q for fiscal 2025
4
SEC EDGARYork Space Systems Inc. 10-Q for fiscal 2025
5
SEC EDGARDirk Wallinger, Chief executive officer
6
SEC EDGARKevin Messerle, Chief financial officer
7
SEC EDGARDevjyoti Rudra, Chief Supply Chain Officer
8
SEC EDGARMonica J. Palko, Officer
9
SEC EDGARBrian D. Frantz, Chief Accounting Officer
10
SEC EDGARJames McConville, Board member
11
SEC EDGARKirk Michael Konert, Board member
12
SEC EDGARLouis R. Brothers Jr., Board member
13
SEC EDGARTami Erwin, Board member
14
SEC EDGARTyler Letarte, Board member
15
SEC EDGARJanine Davidson, Board member
16
gleifYork Space Systems Inc. is founded