Stuart D. Aronson - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
Stuart D. Aronson has filed 2 SEC Form 4 filings across 1 company in the last 90 days - buying. Lifetime open-market purchases: $494K.
Profile
Stuart D. Aronson is the Chief Executive Officer at WhiteHorse Finance, Inc. (WHF). Aronson has reported 4 insider filings with the SEC since 2025. The most recent filing was in June 2026.
| Role | Chief Executive Officer, Director |
|---|---|
| Notability | 40/100 |
Board memberships
- WhiteHorse Finance, Inc.
Reported roles
- Chief Executive Officer
Track Record
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Total purchases tracked | 3 |
|---|
Trading Pattern
InsiderAlpha's records for Stuart D. Aronson go back to 2025: 4 primary Form 4 filings, an average of 2.0 per year. The typical open-market purchase is $71K (7 buys totaling $494K). The largest single buy on record is $133K of WHF in 2026. 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 Stuart D. Aronson 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.
- Chief Executive Officer, Director at WhiteHorse Finance, Inc. (WHF) - 4 filings, 2025 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-17 | WHF | WhiteHorse Finance, Inc. | P - Open-market purchase | 15.0K | $6.41 | $96K |
| 2026-05-27 | WHF | WhiteHorse Finance, Inc. | P - Open-market purchase | 20.0K | $6.67 | $133K |
| 2026-05-27 | WHF | WhiteHorse Finance, Inc. | P - Open-market purchase | 5.0K | $6.40 | $32K |
| 2026-05-27 | WHF | WhiteHorse Finance, Inc. | P - Open-market purchase | 7.0K | $6.38 | $45K |
| 2026-03-24 | WHF | WhiteHorse Finance, Inc. | P - Open-market purchase | 5.0K | $7.10 | $36K |
| 2026-03-24 | WHF | WhiteHorse Finance, Inc. | P - Open-market purchase | 8.0K | $6.95 | $56K |
| 2025-11-14 | WHF | WhiteHorse Finance, Inc. | P - Open-market purchase | 14.0K | $6.92 | $97K |
Companies - Last 90 Days
- WhiteHorse Finance, Inc. (WHF) - 2 filings, last 2026-06-17
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Stuart D. Aronson has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- John Bolduc - $935K of WHF open-market activity in the last 12 months
- John Paul Volpe - $21K of WHF open-market activity in the last 12 months
- Joyson Thomas - $20K of WHF open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- SUMITOMO MITSUI FINANCIAL GROUP, INC.
- Suva
- SUVRETTA CAPITAL MANAGEMENT, LLC
- Kevin Tang
- Leonard M. Tannenbaum
- TCG Crossover GP II, LLC
- Tether Holdings, S.A. de C.V.
- Motor Corp/ Toyota
Frequently Asked Questions
Who is Stuart D. Aronson?
Stuart D. Aronson is the Chief Executive Officer at WhiteHorse Finance, Inc. (WHF). Aronson has reported 4 insider filings with the SEC since 2025. The most recent filing was in June 2026.…
How many SEC Form 4 filings has Stuart D. Aronson submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has Stuart D. Aronson been buying or selling stock?
Recorded transactions: 7 open-market purchases ($494K) and 0 open-market sales across all tracked filings.
How accurate is Stuart D. Aronson's historical track record?
Across 3 tracked purchases, Stuart D. Aronson averaged no 30-day data yet with a win rate pending. InsiderAlpha rates the track record at –/5 stars.
Where can I see all of Stuart D. Aronson'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 Stuart D. Aronson profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.