YSS insider buying and SEC filings, explained
Yellowstone Midco Holdings II, LLC · CIK 2086587
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$25.6M
Insiders who bought
1
Sold (not marked 10b5-1)
$18.6M
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Aug 6–7, 2026 | Sale | BlackRock Portfolio Management LLC (10% owner) sold 401,674 shares indirectly between Aug 6 and Aug 7 at about $11.30 ($4.5M). Indirect holdings down 2% to 16,517,115 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 10, 2026 |
| Aug 4–5, 2026 | Sale Amended filing | BlackRock Portfolio Management LLC (10% owner) sold 674,604 shares indirectly between Aug 4 and Aug 5 at about $15.15 ($10.2M). Indirect holdings down 4% to 16,918,789 shares. Not marked as a 10b5-1 plan trade. This amends a filing from Aug 6. | SEC filing Filed Aug 10, 2026 |
| Jul 31–Aug 3, 2026 | Sale | BlackRock Portfolio Management LLC (10% owner) sold 49,328 shares indirectly between Jul 31 and Aug 3 at about $15.11 ($745K). Indirect holdings down <1% to 17,593,393 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 4, 2026 |
| Jul 29–30, 2026 | Sale | BlackRock Portfolio Management LLC (10% owner) sold 204,213 shares indirectly between Jul 29 and Jul 30 at about $15.22 ($3.1M). Indirect holdings down 1% to 17,642,721 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jul 31, 2026 |
| Jan 30, 2026 | Other purchase | Tami A. Erwin (Director) bought 2,941 Common Stock at $34.00 ($100K) in a public offering. Holdings up 4% to 79,984 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 3, 2026 |
| Jan 30, 2026 | Other purchase | Tyler Letarte (Director) bought 1,470 Common Stock indirectly (by spouse) at $34.00 ($50K) in a public offering. New position of 1,470 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 3, 2026 |
| Jan 30, 2026 | Purchase (code P) | BlackRock Portfolio Management LLC (10% owner) bought 752,500 shares indirectly at $34.00 ($25.6M), reported as a purchase (code P). Indirect holdings up 4% to 17,846,934 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 3, 2026 |
14 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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