Form 4
Open-market sale
Insider Selling
2026-09-30
BX insider BX Buzz ML-1 GP LLC (10% Owner) sold 3,767,776 shares (~$11.07M)
BX Buzz ML-1 GP LLC, listed as 10% Owner at Blackstone Inc., reported an open-market sale of 3,767,776 BX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
91,376 |
$2.94 |
$268.5K |
S |
Open-market sale
|
1,257,280 |
$2.94 |
$3.69M |
S |
Open-market sale
|
204,109 |
$2.94 |
$599.7K |
S |
Open-market sale
|
544,646 |
$2.94 |
$1.60M |
S |
Open-market sale
|
1,652,209 |
$2.94 |
$4.85M |
S |
Open-market sale
|
14,902 |
$2.94 |
$43.8K |
S |
Open-market sale
|
3,254 |
$2.94 |
$9.6K |
Filing: Form 4 (Insider Transaction)
Insider: BX Buzz ML-1 GP LLC (10% Owner)
Shares: 3,767,776
Est. Value: $11.07M
Form 4
Open-market sale
Insider Selling
2026-09-28
BX insider Blackstone Holdings I L.P. (10% Owner) sold 125,000 shares (~$2.05M)
Blackstone Holdings I L.P., listed as 10% Owner at Blackstone Inc., reported an open-market sale of 125,000 BX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
400 |
$17.02 |
$6.8K |
S |
Open-market sale
|
124,600 |
$16.40 |
$2.04M |
Filing: Form 4 (Insider Transaction)
Insider: Blackstone Holdings I L.P. (10% Owner)
Shares: 125,000
Est. Value: $2.05M
Form 4
Open-market purchase
Insider Buying
2026-09-24
BX insider Blackstone Holdings IV L.P. (10% Owner) bought 191,694 shares (~$5.02M)
Blackstone Holdings IV L.P., listed as 10% Owner at Blackstone Inc., reported an open-market purchase of 191,694 BX shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
P |
Open-market purchase
|
191,058 |
$26.17 |
$5.00M |
P |
Open-market purchase
|
636 |
$26.17 |
$16.6K |
Filing: Form 4 (Insider Transaction)
Insider: Blackstone Holdings IV L.P. (10% Owner)
Shares: 191,694
Est. Value: $5.02M
Form 4
Open-market sale
Insider Selling
2026-09-18
BX insider Baratta Joseph (Director) sold 100,000 shares (~$12.38M)
Baratta Joseph, listed as Director at Blackstone Inc., reported an open-market sale of 100,000 BX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
42,246 |
$123.35 |
$5.21M |
S |
Open-market sale
|
57,754 |
$124.13 |
$7.17M |
Filing: Form 4 (Insider Transaction)
Insider: Baratta Joseph (Director)
Shares: 100,000
Est. Value: $12.38M
Form 4
Open-market sale
Insider Selling
2026-08-26
BX insider Blackstone Holdings II L.P. (10% Owner) sold 2,572,560 shares (~$56.21M)
Blackstone Holdings II L.P., listed as 10% Owner at Blackstone Inc., reported an open-market sale of 2,572,560 BX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
C |
Derivative conversion
|
571,237 |
— |
— |
S |
Open-market sale
|
571,237 |
$21.85 |
$12.48M |
S |
Open-market sale
|
2,001,323 |
$21.85 |
$43.73M |
J |
Other transaction
|
571,237 |
— |
— |
C |
Derivative conversion
derivative · Common Units of Jersey Mike's HoldCo, LLC
|
571,237 |
— |
— |
Filing: Form 4 (Insider Transaction)
Insider: Blackstone Holdings II L.P. (10% Owner)
Shares: 2,572,560
Est. Value: $56.21M
Form 4
Open-market purchase
Insider Buying
2026-08-24
BX insider Blackstone Holdings IV L.P. (10% Owner) bought 272,641 shares (~$7.13M)
Blackstone Holdings IV L.P., listed as 10% Owner at Blackstone Inc., reported an open-market purchase of 272,641 BX shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
P |
Open-market purchase
|
248,661 |
$26.14 |
$6.50M |
P |
Open-market purchase
|
23,980 |
$26.14 |
$626.8K |
Filing: Form 4 (Insider Transaction)
Insider: Blackstone Holdings IV L.P. (10% Owner)
Shares: 272,641
Est. Value: $7.13M
Form 4
Open-market sale
Insider Selling
2026-08-13
BX insider Blackstone Holdings II L.P. (10% Owner) sold 2,778,124 shares (~$2.89M)
Blackstone Holdings II L.P., listed as 10% Owner at Blackstone Inc., reported an open-market sale of 2,778,124 BX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
2,710,374 |
$1.04 |
$2.82M |
S |
Open-market sale
|
46,817 |
$1.04 |
$48.7K |
S |
Open-market sale
|
20,933 |
$1.04 |
$21.8K |
Filing: Form 4 (Insider Transaction)
Insider: Blackstone Holdings II L.P. (10% Owner)
Shares: 2,778,124
Est. Value: $2.89M
Form 4
Open-market sale
Insider Selling
2026-08-12
BX insider Finley John G (Chief Legal Officer) sold 45,000 shares (~$6.62M)
Finley John G, listed as Chief Legal Officer at Blackstone Inc., reported an open-market sale of 45,000 BX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
19,802 |
$146.80 |
$2.91M |
S |
Open-market sale
|
25,198 |
$147.36 |
$3.71M |
Filing: Form 4 (Insider Transaction)
Insider: Finley John G (Chief Legal Officer)
Shares: 45,000
Est. Value: $6.62M
Form 4
Open-market sale
Insider Selling
2026-08-12
BX insider Payne David (Chief Accounting Officer) sold 9,500 shares (~$1.38M)
Payne David, listed as Chief Accounting Officer at Blackstone Inc., reported an open-market sale of 9,500 BX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
9,500 |
$145.23 |
$1.38M |
Filing: Form 4 (Insider Transaction)
Insider: Payne David (Chief Accounting Officer)
Shares: 9,500
Est. Value: $1.38M
Form 4
Open-market purchase
Insider Buying
2026-08-12
BX insider Porat Ruth (Director) bought 455 shares (~$62.4K)
Porat Ruth, listed as Director at Blackstone Inc., reported an open-market purchase of 455 BX shares in a Form 4 filing. Insider buying is often treated as a bullish signal because company insiders are committing their own capital.
The insider bought shares on the open market with their own money. This is the only Form 4 category that requires a discretionary cash outlay at the prevailing price.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
P |
Open-market purchase
|
126 |
$137.32 |
$17.3K |
P |
Open-market purchase
|
245 |
$137.10 |
$33.6K |
P |
Open-market purchase
|
84 |
$137.32 |
$11.5K |
Filing: Form 4 (Insider Transaction)
Insider: Porat Ruth (Director)
Shares: 455
Est. Value: $62.4K
Form 4
Open-market sale
Insider Selling
2026-08-12
BX insider Argon Holdco LLC (10% Owner) sold 14,500,000 shares (~$491.11M)
Argon Holdco LLC, listed as 10% Owner at Blackstone Inc., reported an open-market sale of 14,500,000 BX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
14,500,000 |
$33.87 |
$491.11M |
Filing: Form 4 (Insider Transaction)
Insider: Argon Holdco LLC (10% Owner)
Shares: 14,500,000
Est. Value: $491.11M
Form 4
Open-market sale
Insider Selling
2026-08-06
BX insider Blackstone Holdings II L.P. (10% Owner) sold 1,900,000 shares (~$3.23M)
Blackstone Holdings II L.P., listed as 10% Owner at Blackstone Inc., reported an open-market sale of 1,900,000 BX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
1,853,665 |
$1.70 |
$3.15M |
S |
Open-market sale
|
32,019 |
$1.70 |
$54.4K |
S |
Open-market sale
|
14,316 |
$1.70 |
$24.3K |
Filing: Form 4 (Insider Transaction)
Insider: Blackstone Holdings II L.P. (10% Owner)
Shares: 1,900,000
Est. Value: $3.23M
Form 4
Open-market sale
Insider Selling
2026-08-05
BX insider Sawhney Vikrant (Chief Administrative Officer) sold 30,000 shares (~$4.07M)
Sawhney Vikrant, listed as Chief Administrative Officer at Blackstone Inc., reported an open-market sale of 30,000 BX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.
The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
S |
Open-market sale
|
18,408 |
$135.29 |
$2.49M |
S |
Open-market sale
|
11,592 |
$135.96 |
$1.58M |
Filing: Form 4 (Insider Transaction)
Insider: Sawhney Vikrant (Chief Administrative Officer)
Shares: 30,000
Est. Value: $4.07M
Form 4
Other reported transaction
Tax / Compensation Filing
2026-08-05
BX insider Form 4 filed for equity award, exercise, or tax withholding
Parrett William G (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.
The filing reports a transaction type that does not map to a routine purchase, sale, award or withholding.
Transactions reported on this filing
| Code |
Nature |
Shares |
Price |
Value |
J |
Other transaction
|
1,500 |
— |
— |
J |
Other transaction
|
1,500 |
— |
— |
Filing: Form 4 (Insider Transaction)
Insider: Parrett William G (Director)
Shares: 3,000