- Corporate Officers - B
- Blackrock Portfolio Management Llc
Insider Trading History of Blackrock Portfolio Management Llc
The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Blackrock Portfolio Management Llc since 2025.
This trader's CIK number is 2052113.
At the time of last reporting, Blackrock Portfolio Management Llc was the 10% Owner of York Space Systems Inc.. (stock ticker symbol YSS).
Also see all insider trading activities at York Space Systems Inc..
Note that in the past
BlackRock Portfolio Management LLC also reported insider trading activities as an insider of the following companies:
Yearly summary of insider trading at Mediaco Holding Inc. (MDIA) by Blackrock Portfolio Management Llc
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | MDIA | 0 | $0 | 214 | $282 | 0 | $0 |
Yearly summary of insider trading at York Space Systems Inc. (YSS) by Blackrock Portfolio Management Llc
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2026 | YSS | 752,500 | $25,585,000 | 1,317,214 | $18,402,332 | 0 | $0 |
Yearly summary of insider trading at Hess Midstream Lp (HESM) by Blackrock Portfolio Management Llc
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | HESM | 0 | $0 | 27,672,517 | $1,048,471,476 | 0 | $0 |
Insider trading activities at 3 companies by Blackrock Portfolio Management Llc:
1. Mediaco Holding Inc. (MDIA)
2. York Space Systems Inc. (YSS)
3. Hess Midstream Lp (HESM)
Table 1. Insider trading of Mediaco Holding Inc. (MDIA) by Blackrock Portfolio Management Llc
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-09-05 | MDIA | Sale | 214 | 1.32 | 282 |
Table 2. Insider trading of York Space Systems Inc. (YSS) by Blackrock Portfolio Management Llc
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2026-08-06 | YSS | Sale | 201,504 | 11.60 | 2,337,446 |
| 2026-08-07 | YSS | Sale | 200,170 | 10.99 | 2,199,868 |
| 2026-08-04 | YSS | Sale | 534,053 | 15.30 | 8,171,010 |
| 2026-08-05 | YSS | Sale | 127,946 | 14.38 | 1,840,503 |
| 2026-07-31 | YSS | Sale | 35,574 | 15.14 | 538,590 |
| 2026-08-03 | YSS | Sale | 13,754 | 15.03 | 206,722 |
| 2026-07-29 | YSS | Sale | 63,390 | 15.31 | 970,500 |
| 2026-07-30 | YSS | Sale | 140,823 | 15.18 | 2,137,693 |
| 2026-01-30 | YSS | Buy | 752,500 | 34.00 | 25,585,000 |
Table 3. Insider trading of Hess Midstream Lp (HESM) by Blackrock Portfolio Management Llc
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-05-30 | HESM | Sale | 15,022,517 | 36.86 | 553,729,976 |
| 2025-02-19 | HESM | Sale | 1,650,000 | 39.11 | 64,531,500 |
| 2025-02-12 | HESM | Sale | 11,000,000 | 39.11 | 430,210,000 |
Insider trading activities including stock purchases, stock sales, and option exercises
listed in the above table cannot be completely guaranteed as to their accuracy.
For more information regarding the trades made by Blackrock Portfolio Management Llc
(10% Owner of York Space Systems Inc. at the time of this reporting) see
the Securities and Exchange Commission (SEC) website.