BlackRock Portfolio Management LLC

10% owner

BlackRock Portfolio Management LLC (10% owner) filed 6 Form 4 reports as a reporting entity in the trailing twelve months (1 purchase, 5 sales, 1 filed past the two-business-day deadline), most often in York Space Systems, Inc. (YSS). Across 1 priced purchase filing, the average 21-session return was -24.6% from execution and -21.4% from disclosure (delay-adjusted; derived). The largest single filing was $25.6M of YSS (752,500 sh × $34.00, as filed), executed Jan 30.

Add to watchlist

Return, ttmiAverage return per filing, trailing twelve months

-24.6%

avg across 1 priced filings

Delay-adjustediThe same average, entered at disclosure dates

-21.4%

same 1 filings, from disclosure

Filings, ttm

1 buys · 5 sells · 1 late

Median delay

execution → disclosure

Volume, ttmiDollar value disclosed in the trailing twelve months

$54.2M

shares × price, as filed

Last traded

Aug 7

Filed Aug 10

Median ADV $21.9M across their filed names

Open performance→

Volume by month

Buys $25.6M Sells $1.1B

Shares × price, as filed · by filing month · past 24 months

Sectors filed on

Industrials 6 filings

Sector per market data · by filing · past 12 months

Most traded names

YSS

York Space Systems, Inc. YSS · 1 buy · 5 sells 6 filings HESM HESM HESM · 0 buys · 3 sells 3 filings

Recent filings

YSSSALE York Space Systems, Inc. View filing → $4.5M
401,674 sh across 2 lots
Exec Aug 6
Filed Aug 10 · 6:16 PM ET YSSSALE York Space Systems, Inc. View filing → $10.2M
674,604 sh across 4 lots
Exec Aug 4
Filed Aug 10 · 6:02 PM ET † YSSSALE York Space Systems, Inc. View filing → $10.0M
661,999 sh across 4 lots
Exec Aug 4
Filed Aug 6 · 4:02 PM ET YSSSALE York Space Systems, Inc. View filing → $745K
49,328 sh across 2 lots
Exec Jul 31
Filed Aug 4 · 4:17 PM ET YSSSALE York Space Systems, Inc. View filing → $3.1M
204,213 sh across 2 lots
Exec Jul 29
Filed Jul 31 · 4:47 PM ET YSSPURCHASE York Space Systems, Inc. View filing → $25.6M
752,500 sh × $34.00
Exec Jan 30
Filed Feb 3 · 5:22 PM ET HESMSALE Hess Midstream LP View filing → $553.7M
15,022,517 sh × $36.86
Exec May 30 2025
Filed May 30 2025 · 5:30 PM ET HESMSALE Hess Midstream LP View filing → $64.5M
1,650,000 sh × $39.11
Exec Feb 19 2025
Filed Feb 19 2025 · 5:30 PM ET More filings →