Companies / York Space Systems Inc.

York Space Systems Inc.

NYSE: YSSCIK 2086587GREENWOOD VILLAGE, CO

Ownership

129.7M shares outstanding · as of May 12, 2026
8.0%Insiders
Ownership
Insiders8.02%10,400,797
10%+ / strategic13.76%17,846,934
Institutions23.98%31,102,367
Public float54.24%70,344,360

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 15

View all →
Insider% of sharesShares
BlackRock Portfolio Management LLC10% owner
13.76%17,846,934
Wallinger DirkCEOChief Executive Officer · Director
7.54%9,783,222
Rudra DevjyotiChief Supply Chain Officer
0.28%358,357
Messerle KevinChief Financial Officer
0.06%80,882
Erwin Tami A.Director
0.06%79,984
Palko Monica J.See Remarks
0.04%54,412
Frantz Brian DChief Accounting Officer
0.01%16,000
Letarte TylerDirector
<0.01%6,764
Boyd AndrewDirector
<0.01%5,294
Brothers Louis R JrDirector
<0.01%5,294

Institutional holders 42

View all →
HolderValue% of shares
BlackRock, Inc.$473.02M14.81%
Bank of New York Mellon Corp/The$37.25M1.30%
State Street Corporation$35.30M1.11%
Clearbridge Investments, LLC$29.83M1.04%
Temasek Holdings (Private) Limited$25.30M0.79%
Voya Investment Management LLC$23.89M0.83%
Granahan Investment Management, LLC$21.45M0.75%
Stephens Investment Management Group LLC$12.68M0.44%
Schroder Investment Management Group$10.21M0.37%
Systematic Financial Management LP$10.13M0.35%

Activity

View all →
InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Jan 30, 2026BlackRock Portfolio Management LLC
10% owner
BuyCommon Stock$25.59M+753K
+4.40%
17,846,934
13.76% of shares
high
Jan 30, 2026Erwin Tami A.
Director
BuyCommon Stock$100.0K+3K
+3.82%
79,984
0.06% of shares
medium
Jan 30, 2026Letarte Tyler
Director
BuyCommon Stock$50.0K+1K
1,470
<0.01% of shares
low
Jan 30, 2026Wallinger Dirk
CEO
GrantCommon Stock$0+211K
+2.21%
9,783,222
7.54% of shares
low
Jan 30, 2026Messerle Kevin
Executive
GrantCommon Stock$0+81K
80,882
0.06% of shares
low
Jan 30, 2026McConville James
Director
GrantCommon Stock$0+5K
5,294
<0.01% of shares
low
Jan 30, 2026Wallinger Dirk
CEO
GrantCommon Stock$0+570K
+5.95%
10,141,966
7.82% of shares
low
Jan 30, 2026Letarte Tyler
Director
GrantCommon Stock$0+5K
5,294
<0.01% of shares
low

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
YSSCommon StockEquity987084100BBG01YLLYSD1