BlackRock Portfolio Management LLC

10% OwnerYork Space Systems Inc. (YSS) · full profile →Form 4/A · filed Aug 10, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$10.2M
Net Open-Market Flow
-$10.2M
Transactions
4
4 non-derivative · 0 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Aug 5, 2026Sell(S)116K$13.49$1.6M16.9M
Aug 5, 2026Sell(S)12K$15.28$182K16.9M
Aug 4, 2026Sell(S)78K$15.02$1.2M17.5M
Aug 4, 2026Sell(S)468K$15.58$7.3M17.0M

Transaction Codes

S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4/A filing (accession 0002052113-26-000810) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

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Ask your agent about YSS insider filings

This filing is the Follow view. The Build view lets your agent pull every Form 4 for the issuer, the net open-market picture over 90 days, and the accession behind each row, through REST or MCP.

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curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/filing/0002052113-26-000810"
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Use Arkolith to summarize insider buying and selling at York Space Systems Inc.
over the last 90 days and cite the filings.