York Space Systems Inc. (YSS) IPO — S-1 Filing, Stock & Insider Activity

York Space Systems Inc. IPO — Status & S-1 Filing

Ticker: YSS
Status: Priced — IPO complete
S-1 filed: 2025-11-17
Effective: 2026-01-28
IPO / pricing date: 2026-01-30
Exchange: NASDAQ
Expected price range: $30.00–$34.00
Shares offered: 18,500,000
SEC CIK: 0002086587 · View the S-1 on SEC EDGAR →

Track every registration update on the InsiderAlpha IPO tracker.

Updated Jul 16, 2026 · Last SEC filing 2026-07-10

York Space Systems Inc. (YSS) has filed 3 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-10. 4 Form 8-K material event filings were reported by YSS in the last 90 days. InsiderAlpha tracks every YSS SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About York Space Systems Inc. (YSS)

SEC CIK	0002086587

90-Day SEC Filing Activity

Form 4 filings (90d)	3
Form 8-K filings (90d)	4
Latest Form 4 filing	2026-07-10

Recent YSS Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-07-08	AEROEQUITY GP, LLC	10% Owner	A — Grant or award	2.29M	$34.00	$77.84M	SEC
2026-06-04	AEROEQUITY GP, LLC	10% Owner	A — Grant or award	287.8K	$34.00	$9.78M	SEC
2026-06-04	AEROEQUITY GP, LLC	10% Owner	A — Grant or award	430.1K	$34.00	$14.62M	SEC
2026-04-10	Davidson Janine	Insider	A — Grant or award	4.4K	$0.00	—	SEC
2026-01-30	Messerle Kevin	Chief Financial Officer	A — Grant or award	80.9K	$0.00	—	SEC
2026-01-30	Konert Kirk Michael	Insider	A — Grant or award	5.3K	$0.00	—	SEC
2026-01-30	McConville James	Insider	A — Grant or award	5.3K	$0.00	—	SEC
2026-01-30	Wallinger Dirk	Chief Executive Officer	A — Grant or award	569.9K	$0.00	—	SEC
2026-01-30	Letarte Tyler	Insider	A — Grant or award	5.3K	$0.00	—	SEC
2026-01-30	BlackRock Portfolio Management LLC	Insider	P — Open-market purchase	752.5K	$34.00	$25.59M	SEC
2026-01-30	Boyd Andrew	Insider	A — Grant or award	5.3K	$0.00	—	SEC
2026-01-30	Brothers Louis R Jr	Insider	A — Grant or award	5.3K	$0.00	—	SEC
2026-01-30	Palko Monica J.	See Remarks	A — Grant or award	54.4K	$0.00	—	SEC
2026-01-30	Rudra Devjyoti	Chief Supply Chain Officer	A — Grant or award	23.5K	$0.00	—	SEC
2026-01-30	Wallinger Dirk	Chief Executive Officer	A — Grant or award	211.2K	$0.00	—	SEC

All transactions sourced from SEC EDGAR Form 4 filings for York Space Systems Inc. (YSS). Updated in real time as new filings are submitted to the SEC.

Most-Active YSS Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
AEROEQUITY GP, LLC	3	$102.25M

Recent YSS Form 8-K Material Events

2026-06-04 — Item 3.02 [SEC]
2026-05-19 — Item 3.02 [SEC]
2026-05-14 — Item 2.02, 9.01 [SEC]
2026-04-29 — Item 1.01, 3.02, 9.01 [SEC]
2026-04-14 — Item 5.02 · Leadership · positive [SEC]
York Space Systems Inc. appointed Janine A. Davidson, a former U.S. Navy Undersecretary with extensive defense and aerospace policy experience, to its Board of Directors effective April 10, 2026. Dr. Davidson was also appointed to the Audit Committee, and the Board size was incre

Recent Insider Filings

2026-07-10 — AEROEQUITY GP, LLC (10% Owner)
2026-06-29 — AEROEQUITY GP, LLC (10% Owner)
2026-06-05 — AEROEQUITY GP, LLC (10% Owner)
2026-04-14 — Davidson Janine (Insider)
2026-03-11 — Wallinger Dirk (Chief Executive Officer)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in YSS insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

YSS Insider Trading — FAQ

What is the latest insider trade for YSS?: York Space Systems Inc. (YSS) had 3 insider filings in the last 90 days, with the most recent on 2026-07-10. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying YSS stock?: 0 insider purchases of YSS were filed in the last 90 days.
How many insiders are selling YSS stock?: 0 insider sales of YSS were filed in the last 90 days.
Where can I see YSS SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every YSS SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

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