Brent D. Rosenthal
CIK: 0001443849
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (17 total)
- Aug 24, 2026HKHC
Horizon Kinetics Holding Corp
Purchase(P)Direct2K shares at avg. $27.00$54K - Jun 18, 2026PBI
PITNEY BOWES INC /DE/
Exercise(M)Direct8.8K shares- - May 20, 2026HKHC
Horizon Kinetics Holding Corp
Purchase(P)Direct700 shares at avg. $27.85$19K - May 12, 2026PBI
PITNEY BOWES INC /DE/
Award(A)DirectRestricted Stock Unit
18.2K shares- - May 12, 2026PBI
PITNEY BOWES INC /DE/
Award(A)DirectRestricted Stock Unit
6.5K shares- - Mar 18, 2026HKHC
Horizon Kinetics Holding Corp
Purchase(P)Direct750 shares at avg. $33.05$25K - Mar 13, 2026PBI
PITNEY BOWES INC /DE/
Purchase(P)Direct4K shares at avg. $10.22$41K - Feb 20, 2026OPTX
SYNTEC OPTICS HOLDINGS, INC.
Award(A)DirectRestricted Stock Units
24.6K shares- - Nov 25, 2025HKHC
Horizon Kinetics Holding Corp
Purchase(P)Direct300 shares at avg. $27.28$8K - Nov 25, 2025PBI
PITNEY BOWES INC /DE/
Purchase(P)Direct500 shares at avg. $10.01$5K - Nov 25, 2025PBI
PITNEY BOWES INC /DE/
Purchase(P)Direct1.5K shares at avg. $10.00$15K - Oct 6, 2025OPTX
SYNTEC OPTICS HOLDINGS, INC.
Award(A)DirectRestricted Stock Units
77.3K shares- - Sep 3, 2025PBI
PITNEY BOWES INC /DE/
Purchase(P)Direct3K shares at avg. $11.97$36K - Sep 2, 2025HKHC
Horizon Kinetics Holding Corp
Purchase(P)Direct300 shares at avg. $38.00$11K - Jun 18, 2025PBI
PITNEY BOWES INC /DE/
Award(A)DirectRestricted Stock Unit
8.8K shares- - Nov 19, 2024HKHC
Horizon Kinetics Holding Corp
Purchase(P)Direct100 shares at avg. $37.06$4K - Nov 14, 2024HKHC
Horizon Kinetics Holding Corp
Purchase(P)Direct300 shares at avg. $38.06$11K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 24, 2026 |  HKHC Horizon Kinetics Holding Corp | Purchase(P) | 2,000 | $27.00 | $54,000 | Direct |
| Jun 18, 2026 |  PBI PITNEY BOWES INC /DE/ | Exercise(M) | 8,755 | - | $0 | Direct |
| May 20, 2026 | HKHC Horizon Kinetics Holding Corp | Purchase(P) | 700 | $27.85 | $19,495 | Direct |
| May 12, 2026 | PBI PITNEY BOWES INC /DE/ | Award(A) Restricted Stock Unit | 18,159 | - | - | Direct |
| May 12, 2026 | PBI PITNEY BOWES INC /DE/ | Award(A) Restricted Stock Unit | 6,532 | - | - | Direct |
| Mar 18, 2026 | HKHC Horizon Kinetics Holding Corp | Purchase(P) | 750 | $33.05 | $24,787 | Direct |
| Mar 13, 2026 | PBI PITNEY BOWES INC /DE/ | Purchase(P) | 4,000 | $10.22 | $40,900 | Direct |
| Feb 20, 2026 |  OPTX SYNTEC OPTICS HOLDINGS, INC. | Award(A) Restricted Stock Units | 24,646 | - | - | Direct |
| Nov 25, 2025 | HKHC Horizon Kinetics Holding Corp | Purchase(P) | 300 | $27.28 | $8,184 | Direct |
| Nov 25, 2025 | PBI PITNEY BOWES INC /DE/ | Purchase(P) | 500 | $10.01 | $5,003 | Direct |
| Nov 25, 2025 | PBI PITNEY BOWES INC /DE/ | Purchase(P) | 1,500 | $10.00 | $15,000 | Direct |
| Oct 6, 2025 | OPTX SYNTEC OPTICS HOLDINGS, INC. | Award(A) Restricted Stock Units | 77,320 | - | - | Direct |
| Sep 3, 2025 | PBI PITNEY BOWES INC /DE/ | Purchase(P) | 3,000 | $11.97 | $35,910 | Direct |
| Sep 2, 2025 | HKHC Horizon Kinetics Holding Corp | Purchase(P) | 300 | $38.00 | $11,400 | Direct |
| Jun 18, 2025 | PBI PITNEY BOWES INC /DE/ | Award(A) Restricted Stock Unit | 8,755 | - | - | Direct |
| Nov 19, 2024 | HKHC Horizon Kinetics Holding Corp | Purchase(P) | 100 | $37.06 | $3,706 | Direct |
| Nov 14, 2024 | HKHC Horizon Kinetics Holding Corp | Purchase(P) | 300 | $38.06 | $11,418 | Direct |
1-17 of 17 transactions
About Rosenthal Brent D
Rosenthal Brent D (SEC CIK 0001443849) files insider reports with the SEC as Director of Horizon Kinetics Holding Corp (HKHC), Director of PITNEY BOWES INC /DE/ (PBI) and Director of SYNTEC OPTICS HOLDINGS, INC. (OPTX).
Signal8 holds 16 ownership filings by Rosenthal Brent D (1 Form 3, 15 Form 4), filed between Nov 15, 2024 and Aug 25, 2026. Those filings report 17 transactions, from Nov 14, 2024 to Aug 24, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Rosenthal Brent D's filings is in NEW YORK, NY.
Recent filings by Rosenthal Brent D
- Aug 24, 2026: Open-market purchase of HKHC shares (Form 4, code P).
- Jun 18, 2026: Option exercise of PBI shares (Form 4, code M).
- May 20, 2026: Open-market purchase of HKHC shares (Form 4, code P).
- May 12, 2026: Grants or awards of PBI derivative securities (2 lines, Form 4, code A).
- Mar 18, 2026: Open-market purchase of HKHC shares (Form 4, code P).
Other insiders filing for Horizon Kinetics Holding Corp (HKHC)
- Nagelberg Allison, Director
- Brennan Alice C, Director
- Roller Daniel J, Director
- Herndon Mark, Chief Financial Officer
- STAHL MURRAY, CEO and CIO
- Maran Partners Fund, LP, Officer