Quick Takeaways
- Joseph D. Hammer has 2 issuer positions tracked on this page.
- Estimated disclosed ownership value: $21,195,000.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of Joseph D. Hammer
- Location
- New York, NY
- Summary
- The estimated net worth of Joseph D. Hammer is at least $21,195,000 dollars as of 18 Nov 2025. Joseph D. Hammer is the Director, 10%+ Owner of Trailblazer Merger Corp I and owns shares of Trailblazer Merger Corp I (TBMC) stock worth about $21.2M.
- Signature
- /s/ Shawna Bowin, Attorney-in-Fact for Joseph D. Hammer
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Joseph D. Hammer and return when a new Insider Trading filing changes the record on this page.
This uses the existing product follow flow to surface future filing-backed changes without guessing what they mean.
What Changed
- Largest disclosed position: Trailblazer Merger Corp I ($21,195,000).
- 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 Joseph D. Hammer
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| TBMC, TBMCR | Trailblazer Merger Corp I | Director, 10%+ Owner | $21,195,000 | 31 Mar 2023 | ||
| XPON | Expion360 Inc. | Chief Executive Officer, Director | 17 Oct 2025 |
Insider Transactions Reported by Joseph D. Hammer:
| 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.