| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
10% Owner
4 companies
Blackrock Portfolio Management LLC is 10% Owner at MDIA and has filed Form 4s across 4 companies.
Historically, Blackrock Portfolio Management LLC's trades have earned a strong insider score of 71/100 across 10 rated trades. Over a 12-month horizon, 75.0% of those trades were profitable, with an average 12-month return of +7.7%.
The biggest single holding is YSS (~$100.6M) as 10% Owner. The YSS filings lean toward selling, a net 564,714 shares.
Blackrock Portfolio Management LLC has 38 Form 4 filings on record from February 2025 to October 2026, across 4 companies: 10% Owner at Clearway Energy (CWEN), 2025–2026; 10% Owner at York Space Systems (YSS), 2026; 10% Owner at Mediaco (MDIA), 2025, and 1 more.
The 64 reported transactions were 42 other transactions, 14 open-market sales, 5 conversions and 1 open-market purchase, plus smaller numbers of other types.
Counted by filing, the open-market trades come to 1 purchase worth about $25.6M and 8 sales worth about $1.1B.
The only open-market purchase was 752,500 shares of YSS at an average $34.00 on January 30, 2026, about $25.6M.
The largest open-market sale was 15,022,517 shares of HESM at an average $36.86 on May 30, 2025, about $553.7M. Twelve months later HESM was up 1%.
None of the 8 sales since April 2023 was marked as made under a Rule 10b5-1 trading plan.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Aug 7, 2026 | YSS York Space Systems, Inc. | 10% Owner | Sell | 401,674 | $11.30 | $4,537,314.70 | -2.4% | - | - | |
| Aug 5, 2026 | YSS York Space Systems, Inc. | 10% Owner | Sell | 661,999 | $15.14 | $10,024,094.56 | -3.8% | -46.8% | - | |
| Aug 3, 2026 | YSS York Space Systems, Inc. | 10% Owner | Sell | 49,328 | $15.11 | $745,312.98 | -0.3% | -51.1% | - | |
| Jul 30, 2026 | YSS York Space Systems, Inc. | 10% Owner | Sell | 204,213 | $15.22 | $3,108,194.04 | -1.1% | -56.8% | - | |
| Jan 30, 2026 | YSS York Space Systems, Inc. | 10% Owner | Buy | 752,500 | $34.00 | $25,585,000.00 | +4.4% | -2.3% | - | |
| Sep 5, 2025 | MDIA Mediaco Holding Inc. | 10% Owner | Sell | 214 | $1.32 | $282.48 | - | -33.3% | -15.6% | |
| May 30, 2025 | HESM Hess Midstream LP | 10% Owner | Sell | 15,022,517 | $36.86 | $553,729,976.62 | - | +12.4% | +1.4% | |
| Feb 19, 2025 | HESM Hess Midstream LP | 10% Owner | Sell | 1,650,000 | $39.11 | $64,531,500.00 | - | -5.8% | -8.9% | |
| Feb 12, 2025 | HESM Hess Midstream LP | 10% Owner | Sell | 11,000,000 | $39.11 | $430,210,000.00 | - | +0.2% | -7.8% |