Isaac Kalish - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
Isaac Kalish is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days.
Profile
Isaac Kalish is a corporate insider at ONE LIBERTY PROPERTIES INC (OLP). Kalish's filing history also covers BRT Apartments Corp. (BRT). Kalish has reported 5 insider filings with the SEC since 2024. The most recent filing was in January 2026.
| Role | Sr Vice President and CFO |
|---|---|
| Notability | 20/100 |
Board memberships
- ONE LIBERTY PROPERTIES INC
- BRT Apartments Corp.
Trading Pattern
InsiderAlpha's records for Isaac Kalish go back to 2025: 5 primary Form 4 filings, an average of 2.5 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role Isaac Kalish has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Sr Vice President and CFO at ONE LIBERTY PROPERTIES INC (OLP) - 3 filings, 2025 to 2026
- VP and Treasurer at BRT Apartments Corp. (BRT) - 2 filings, 2025
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-01-16 | OLP | ONE LIBERTY PROPERTIES INC | A - Grant or award | 6.8K | $0.00 | |
| 2025-10-14 | BRT | BRT Apartments Corp. | G - Bona-fide gift | 150 | $0.00 | |
| 2025-09-26 | OLP | ONE LIBERTY PROPERTIES INC | G - Bona-fide gift | 4.5K | $0.00 | |
| 2025-09-26 | OLP | ONE LIBERTY PROPERTIES INC | G - Bona-fide gift | 4.5K | $0.00 | |
| 2025-09-26 | OLP | ONE LIBERTY PROPERTIES INC | G - Bona-fide gift | 4.5K | $0.00 | |
| 2025-09-26 | BRT | BRT Apartments Corp. | G - Bona-fide gift | 145 | $0.00 | |
| 2025-09-26 | BRT | BRT Apartments Corp. | G - Bona-fide gift | 145 | $0.00 | |
| 2025-09-26 | BRT | BRT Apartments Corp. | G - Bona-fide gift | 145 | $0.00 | |
| 2025-08-05 | OLP | ONE LIBERTY PROPERTIES INC | A - Grant or award | 1.8K | $0.00 |
Most Active Insiders Right Now
Isaac Kalish has no recent co-filers at the same companies, so here are the insiders with the largest open-market activity across the market in the last 90 days.
- Magnetar Financial LLC - $8.53B of CRWV open-market activity in the last 90 days
- VisionWave Holdings, Inc. - $7.98B of SVRE open-market activity in the last 90 days
- AI Alpine (Luxembourg) S.a.r.l. - $2.69B of INIO open-market activity in the last 90 days
- SGF FANG Holdings, LP - $2.04B of FANG open-market activity in the last 90 days
- BCP 8 Holdings Mozart Manager L.L.C. - $1.22B of MDLN open-market activity in the last 90 days
- BX Mozart ML-2 Holdco L.P. - $1.22B of MDLN open-market activity in the last 90 days
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Jared Isaacman
- Ryan Israel
- Mitchell Jacobson
- JANA Partners Management, LP
- Jan Philipp Jenisch
- Marc Johnson
- James Jones
- Andrew T. Kaplan
Frequently Asked Questions
Who is Isaac Kalish?
Isaac Kalish is a corporate insider at ONE LIBERTY PROPERTIES INC (OLP). Kalish's filing history also covers BRT Apartments Corp. (BRT). Kalish has reported 5 insider filings with the SEC since 2024. The most recent filing was in January 2026.…
Where can I see all of Isaac Kalish's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live Isaac Kalish profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.