Quick Takeaways
- Jonathan S. Leff has 3 issuer positions tracked on this page.
- Estimated disclosed ownership value is not available.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of Jonathan S. Leff
- Location
- New York, NY
- Signature
- /s/ Jennifer Johansson, Attorney-in-fact
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Jonathan S. Leff and return when a new Insider Trading filing appears.
This tracks SEC filing changes for this page using existing product update flows.
What Changed
- Largest disclosed position: ARS Pharmaceuticals, Inc. ().
- Past-year value change for that position: .
Why This Matters
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Source Evidence
Filed on Form 4
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of Jonathan S. Leff
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| SPRY | ARS Pharmaceuticals, Inc. | Director | 08 Nov 2022 | |||
| PHGE | BiomX Inc. | Director | 14 Apr 2025 | |||
| LRMR | Larimar Therapeutics, Inc. | Director | 13 May 2025 |
Insider Transactions Reported by Jonathan S. Leff:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.