Key facts
- This page summarizes Tami A. Erwin's Form 4 filing for Yellowstone Midco Holdings II, LLC (YSS).
- 2 reported transactions and 0 derivative rows are listed below.
- Accepted by SEC: 03 Feb 2026, 21:04.
Tami A. Erwin - 30 Jan 2026 Form 4 Insider Report for Yellowstone Midco Holdings II, LLC (YSS)
- Reporting relationship
- Director
- Issuer ticker
- YSS
- Reported as of
- 30 Jan 2026
- Net transaction value
- +$99,994
- SEC form
- 4
- Accepted by SEC
- 03 Feb 2026, 21:04:13 UTC
- Prior SEC filing
- 29 Jan 2026
- Next SEC filing
- 05 Mar 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Monica Palko, by Power of Attorney
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Tami A. Erwin filed Form 4 for Yellowstone Midco Holdings II, LLC (YSS) on 03 Feb 2026.
Change
- Previous filing in this sequence was filed on 29 Jan 2026.
- Current net transaction value: +$99,994.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001760658
Primary reporting owner
Erwin Tami A.
- Relationship
- Director
- Address
- C/O YORK SPACE SYSTEMS INC., 6060 S WILLOW DRIVE, GREENWOOD VILLAGE
- Signature
- /s/ Monica Palko, by Power of Attorney
- Signature date
- 03 Feb 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
YSS
transaction
Common Stock
Award
- Transaction value
- $0
- Shares
- +5,294
- Change %
- +7.4%
- Price
- $0.000000
- Shares after
- 77,043
- Date
- 30 Jan 2026
- Ownership
- Direct
- Footnotes
- F1
YSS
transaction
Common Stock
Purchase
- Transaction value
- $99,994
- Shares
- +2,941
- Change %
- +3.8%
- Price
- $34.00
- Shares after
- 79,984
- Date
- 30 Jan 2026
- Ownership
- Direct
- Footnotes
- F2
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 2 footnotes
Footnote F1
Represents restricted stock units which vest on the first anniversary of the grant date.
Footnote F2
Represents the price to the public in the issuer's initial public offering.