York Space Systems Inc. (YSS)
NYSE: YSS · Guided Missiles & Space Vehicles & Parts · filing with the SEC since 2025
Who owns York Space Systems Inc.
As filed with the SECHolders of 5% or more
4
AeroEquity GP, LLC holds 24% of Common Stock, par value $0.0001, as its SCHEDULE 13G/A filed Aug 14, 2026 says.
Directors and officers
12
report now, of 12 people on the record since 2026. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 4 named at left.
Holders of 5% or moreshare of the class, as filed
AeroEquity GP, LLC
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, par value $0.0001 · 23.3% in May 15, 2026
BlackRock Portfolio Management LLC
SCHEDULE 13G · filed Apr 29, 2026 · Common Stock
Dirk Wallinger
SCHEDULE 13G · filed May 15, 2026 · Common Stock, par value $0.0001 per share
Blackrock, Inc.
SCHEDULE 13G · filed Oct 27, 2026 · Common Stock
What YSS reports owning in othersstakes of 5% or more, and other ties
15 subsidiaries in 4 countries, from the list filed with the 10-K filed Mar 20, 2026.
Insider tradesForm 4
0sales
2purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$100,000bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window3 of 16 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Blackrock Portfolio Management LLC | 10% owner | 14 | $28.6M | 0 | 1 | $25.6M |
| Erwin Tami A. | director | 0 | $0 | 0 | 1 | $100,000 |
| Letarte Tyler | director | 0 | $0 | 0 | 1 | $0 |