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NYSE · CIK 0002086587

YSS York Space Systems Inc.

Insider trading from SEC Form 4. Last filing Aug 10, 2026. Close $7.11 on Oct 9, 2026, 0% from the 52-week low and -84% from the high.

In brief

York Space Systems Inc. (YSS) has 22 SEC Form 4 filings on file from 14 insiders, the latest filed on Aug 10, 2026. In the last 90 days insiders made 0 open-market buys worth $0 and 5 open-market sells worth $29M, net -$29M.

8 open-market trades have been scored at YSS. The newest: BlackRock Portfolio Management LLC (10% owner) sold $4.5M of stock on Aug 6, 2026, filed Aug 10, 2026, scored 37 (weak). The largest of the 8 shown: BlackRock Portfolio Management LLC (10% owner) bought $26M on Jan 30, 2026, scored 47 (moderate). 3 insiders bought within 14 days of each other around Jan 30, 2026.

Last 90 days

Net insider value
-$29M
more sold than bought
Buys
0
$0 by 0 insiders
Sells
5
$29M by 1 insider
Insiders on file
14
with a Form 4 at this company

Price and insider trades, last year

YSSOct 9, 2026 · close 7.11

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™

Signals

Open-market buys and sells at York Space Systems Inc., scored.

ScoreInsiderValueHoldingsPrice contextFiled
37WeakBlackRock Portfolio Management LLC
owner
sell
$4.5M
401,674 shares
-2%0% from low-75% from high
37WeakBlackRock Portfolio Management LLC
owner
sell
$10M
674,604 shares
-4%+7% from low-65% from high
37WeakBlackRock Portfolio Management LLC
owner
sell
$10M
661,999 shares
-4%+7% from low-65% from high
33WeakBlackRock Portfolio Management LLC
owner
sell
$745k
49,328 shares
-0%0% from low-66% from high
37WeakBlackRock Portfolio Management LLC
owner
sell
$3.1M
204,213 shares
-1%0% from low-65% from high
47ModerateBlackRock Portfolio Management LLC
owner
buy
$26M
752,500 shares
+4%-
40ModerateTami A. Erwin
director
buy
$100k
2,941 shares
+4%-
45ModerateTyler Letarte
director
buy
$50k
1,470 shares
--

Transactions

Every row filed, 33 in all.

DateInsiderTransactionSharesPriceValueHoldings afterFiled
Aug 6, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-201,504$11.60$2.3M16,717,285Aug 10, 2026
Aug 4, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-78,082$15.02$1.2M17,515,311Aug 10, 2026
Aug 4, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-468,476$15.58$7.3M17,046,835Aug 10, 2026
Aug 7, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-200,170$10.99$2.2M16,517,115Aug 10, 2026
Aug 5, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-116,162$13.49$1.6M16,930,673Aug 10, 2026
Aug 5, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-11,884$15.28$182k16,918,789Aug 10, 2026
Aug 4, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-77,743$15.02$1.2M17,515,650Aug 6, 2026
Aug 4, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-456,310$15.58$7.1M17,059,340Aug 6, 2026
Aug 5, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-116,162$13.49$1.6M16,943,178Aug 6, 2026
Aug 5, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-11,784$15.28$180k16,931,394Aug 6, 2026
Jul 31, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-35,574$15.14$539k17,607,147Aug 4, 2026
Aug 3, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-13,754$15.03$207k17,593,393Aug 4, 2026
Jul 29, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-63,390$15.31$971k17,783,544Jul 31, 2026
Jul 30, 2026BlackRock Portfolio Management LLC
owner
SOpen-market sale
Common Stockindirect: See footnotes
-140,823$15.18$2.1M17,642,721Jul 31, 2026
Jul 8, 2026Aeroequity Gp, LLC
owner
AGrant or award
Common Stock, par value $0.0001 per shareindirect: See Footnotes
+2,289,366$34.00$78M32,915,588Jul 10, 2026
Jun 4, 2026Aeroequity Gp, LLC
owner
AGrant or award
Common Stock, par value $0.0001 per shareindirect: See Footnotes
+430,134$34.00$15M30,626,222Jun 29, 2026
Jun 4, 2026Aeroequity Gp, LLC
owner
AGrant or award
Common Stock, par value $0.0001 per shareindirect: See Footnotes
+287,789$34.00$9.8M30,483,877Jun 5, 2026
Apr 10, 2026Janine Davidson
director
AGrant or award
Common Stock
+4,381$0.00$04,381Apr 14, 2026
Jan 30, 2026Dirk Wallinger
Chief Executive Officer
AGrant or award
Common Stock
+211,176$0.00$09,783,222Mar 11, 2026
Jan 30, 2026Andrew Boyd
director
AGrant or award
Common Stock
+5,294$0.00$05,294Feb 3, 2026
Jan 30, 2026Louis R Brothers Jr
director
AGrant or award
Common Stock
+5,294$0.00$05,294Feb 3, 2026
Jan 30, 2026Tami A. Erwin
director
AGrant or award
Common Stock
+5,294$0.00$077,043Feb 3, 2026
Jan 30, 2026Brian D Frantz
Chief Accounting Officer
AGrant or award
Common Stock
+10,294$0.00$016,000Feb 3, 2026
Jan 30, 2026Kirk Michael Konert
director
AGrant or award
Common Stock
+5,294$0.00$05,294Feb 3, 2026
Jan 30, 2026Tyler Letarte
director
AGrant or award
Common Stock
+5,294$0.00$05,294Feb 3, 2026
Jan 30, 2026James McConville
director
AGrant or award
Common Stock
+5,294$0.00$05,294Feb 3, 2026
Jan 30, 2026Kevin Messerle
Chief Financial Officer
AGrant or award
Common Stock
+80,882$0.00$080,882Feb 3, 2026
Jan 30, 2026Monica J. Palko
See Remarks
AGrant or award
Common Stock
+54,412$0.00$054,412Feb 3, 2026
Jan 30, 2026Devjyoti Rudra
Chief Supply Chain Officer
AGrant or award
Common Stock
+23,529$0.00$0358,357Feb 3, 2026
Jan 30, 2026Dirk Wallinger
Chief Executive Officer
AGrant or award
Common Stock
+569,920$0.00$010,141,966Feb 3, 2026
Jan 30, 2026BlackRock Portfolio Management LLC
owner
POpen-market purchase
Common Stockindirect: See footnote
+752,500$34.00$26M17,846,934Feb 3, 2026
Jan 30, 2026Tami A. Erwin
director
POpen-market purchase
Common Stock
+2,941$34.00$100k79,984Feb 3, 2026
Jan 30, 2026Tyler Letarte
director
POpen-market purchase
Common Stockindirect: By spouse
+1,470$34.00$50k1,470Feb 3, 2026

Insiders

Everyone who has filed a Form 4 here.

Questions about YSS

Answered from the filings on this page, as of the latest one.

Are insiders buying YSS?

As of Aug 10, 2026, SEC Form 4 filings show 0 open-market buys worth $0 by 0 insiders and 5 open-market sells worth $29M by 1 insider at York Space Systems Inc. in the last 90 days, net -$29M. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.

Who was the last insider to trade YSS on the open market?

BlackRock Portfolio Management LLC (10% owner) sold $4.5M of YSS on Aug 6, 2026 and filed the Form 4 on Aug 10, 2026. InsiderTell scored 37 (weak).

How many insiders file Form 4 at York Space Systems Inc.?

14 people have filed a Form 4 at York Space Systems Inc., among them Aeroequity Gp, LLC (director and 10% owner), BlackRock Portfolio Management LLC (10% owner), Andrew Boyd (director). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

YSS insider trading: York Space Systems Inc. | InsiderTell