Key facts
- This page summarizes BlackRock Portfolio Management LLC's Form 4 filing for York Space Systems Inc. (YSS).
- 2 reported transactions and 0 derivative rows are listed below.
- Accepted by SEC: 31 Jul 2026, 16:47.
BlackRock Portfolio Management LLC - 29 Jul 2026 Form 4 Insider Report for York Space Systems Inc. (YSS)
- Reporting relationship
- 10%+ Owner
- Issuer ticker
- YSS
- Reported as of
- 29 Jul 2026
- Net transaction value
- -$3,108,194
- SEC form
- 4
- Accepted by SEC
- 31 Jul 2026, 16:47:49 UTC
- Prior SEC filing
- 13 Jul 2026
- Source filing
- View source filing
- Reporting owner signature
- BlackRock Portfolio Management LLC, By: /s/ David Maryles, Authorized Signatory
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
BlackRock Portfolio Management LLC filed Form 4 for York Space Systems Inc. (YSS) on 31 Jul 2026.
Change
- Previous filing in this sequence was filed on 13 Jul 2026.
- Current net transaction value: -$3,108,194.
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 0002052113
Primary reporting owner
BlackRock Portfolio Management LLC
- Relationship
- 10%+ Owner
- Address
- 50 HUDSON YARDS, NEW YORK
- Signature
- BlackRock Portfolio Management LLC, By: /s/ David Maryles, Authorized Signatory
- Signature date
- 31 Jul 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
YSS
transaction
Common Stock
Sale
- Transaction value
- $970,501
- Shares
- -63,390
- Change %
- -0.36%
- Price
- $15.31
- Shares after
- 17,783,544
- Date
- 29 Jul 2026
- Ownership
- See footnotes
- Footnotes
- F1, F2, F3, F4
YSS
transaction
Common Stock
Sale
- Transaction value
- $2,137,693
- Shares
- -140,823
- Change %
- -0.79%
- Price
- $15.18
- Shares after
- 17,642,721
- Date
- 30 Jul 2026
- Ownership
- See footnotes
- Footnotes
- F1, F2, F3, F5
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 5 footnotes
Footnote F1
Represents shares of the Issuer's common stock held by the following funds and accounts under management by certain subsidiaries of BlackRock, Inc.: BlackRock Private Equity Co-Investments, 2021 Aggregator Cayman Ltd., BlackRock Growth Equity Fund Master Cayman Aggregator Ltd., BR POF IV CAYMAN MASTER FUND, L.P., BlackRock Private Opportunities Fund IV, L.P., BlackRock Private Opportunities Fund IV Master SCSp, TSCL Private Markets Cayman Fund Ltd., 1885 Private Opportunities Cayman Fund, Ltd., Heathrow Forest Opportunities Fund, L.P., Lincoln Pension Private Equity BR, L.P., NHRS Private Opportunities Fund, L.P., NDSIB Private Opportunities Fund Cayman Ltd., Mutual of Omaha OF Cayman, Ltd., BlackRock ERI Private Opportunities Master SCSp, Sullivan Way POF Cayman, Ltd, Total Alternatives Fund - Private Equity (B) LP, Total Alternatives Fund - Private Equity LP, 1824 Private Equity Fund, L.P., Tango Capital Opportunities Fund, L.P., BlackRock Private Investments Fund,
Footnote F2
(Continued from footnote 1) OV Private Opportunities Cayman, Ltd., SONJ Opportunities Cayman, Ltd., Red River Direct Investment Fund III, L.P., MB BlackRock Holdings Cayman Ltd. and certain other funds and accounts managed by BlackRock Financial Management, Inc., BlackRock Institutional Trust Company, National Association, BlackRock Investment Management (UK) Limited and BlackRock Investment Management, LLC (collectively, the "Advised Funds and Accounts"). Each of BlackRock Portfolio Management LLC, the Advised Funds and Accounts and their respective direct or indirect managers, general partners and portfolio managers who share voting and investment power over the shares held by the Advised Funds and Accounts expressly disclaim beneficial ownership of the shares of common stock held by the Advised Funds and Accounts, except to the extent of their pecuniary interest therein,
Footnote F3
(Continued from footnote 2) and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purposes.
Footnote F4
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.27 to $16.07, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.
Footnote F5
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.00 to $15.65, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.
SEC remarks
In accordance with SEC Release No. 34-39538 (January 12, 1998), BlackRock Portfolio Management LLC is reporting Issuer securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. This filing does not include Issuer securities, if any, beneficially owned by other business units whose beneficial ownership of securities is disaggregated from that of the Reporting Business Units in accordance with such release.