York Space Systems Inc. (YSS) Insider Trading

Last 12 months

Insiders bought $150k on the open market and sold nothing.

Net open-market

+$150k

2 buys · 0 sales

Under a 10b5-1 plan

—

no sales

Insiders who bought / sold

2 / 0

executives and directors

Last open-market buy

Jan 2026

Jan 30, 2026

Get an email when YSS's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Aug 6 – 7	Blackrock Portfolio Management LLC Large holder	SoldNo plan 2 parts	401,674	$11.30 average	$4.54M	2.4%	Form 4
Aug 4 – 5	Blackrock Portfolio Management LLC Large holder	SoldNo plan 4 parts	674,604	$15.15 average	$10.2M	3.8%	Form 4
Jul 31 – Aug 3	Blackrock Portfolio Management LLC Large holder	SoldNo plan 2 parts	49,328	$15.11 average	$745k	0.3%	Form 4
Jul 29 – 30	Blackrock Portfolio Management LLC Large holder	SoldNo plan 2 parts	204,213	$15.22 average	$3.11M	1.1%	Form 4
Jan 30	Tami A. Erwin Director	Bought	2,941	$34.00	$100k	3.8%	Form 4
Jan 30	Tyler Letarte Director	Bought	1,470	$34.00	$50k	28%	Form 4
Jan 30	Blackrock Portfolio Management LLC Large holder	Bought	752,500	$34.00	$25.6M	4.4%	Form 4

Aug 6 – 7No plan
Blackrock Portfolio Management LLC
Large holder · sold 401,674 at avg $11.30
$4.54M
2.4% of stake
Aug 4 – 5No plan
Blackrock Portfolio Management LLC
Large holder · sold 674,604 at avg $15.15
$10.2M
3.8% of stake
Jul 31 – Aug 3No plan
Blackrock Portfolio Management LLC
Large holder · sold 49,328 at avg $15.11
$745k
0.3% of stake
Jul 29 – 30No plan
Blackrock Portfolio Management LLC
Large holder · sold 204,213 at avg $15.22
$3.11M
1.1% of stake
Jan 30
Tami A. Erwin
Director · bought 2,941 at $34.00
$100k
3.8% of stake
Jan 30
Tyler Letarte
Director · bought 1,470 at $34.00
$50k
28% of stake
Jan 30
Blackrock Portfolio Management LLC
Large holder · bought 752,500 at $34.00
$25.6M
4.4% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch YSS, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Data sourced from company filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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