Updated Jul 16, 2026
MOULDER LEON O JR has filed 4 SEC Form 4 filings across 2 companies in the last 90 days — buying. Lifetime open-market purchases: $5.76M. Historical track record: 1/5 stars across 8 tracked purchases.
Leon O Moulder Jr is a corporate executive known for his roles in the biopharmaceutical industry, particularly as the Chief Executive Officer and Director at Zenas BioPharma, Inc. He has been involved in the development of innovative therapies for autoimmune diseases.
| Role | Insider |
|---|---|
| Notability | 30/100 |
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realised performance after each tracked open-market purchase.
| InsiderAlpha rating | ★☆☆☆☆ (1/5) |
|---|---|
| Total purchases tracked | 8 |
| Purchases with forward-return data | 8 |
| 30-day win rate | 2500% |
| 90-day win rate | 3750% |
| Avg 5-day return | +438.01% |
| Avg 30-day return | +65.94% |
| Avg 90-day return | -1355.31% |
| Best 30-day return | +5568.35% |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-22 | ZLAB | Zai Lab Ltd | A — Grant or award | 22.4K | $0.00 | |
| 2026-05-19 | ZBIO | Zenas BioPharma, Inc. | P — Open-market purchase | 60.0K | $16.88 | $1.01M |
| 2026-04-29 | ZBIO | Zenas BioPharma, Inc. | P — Open-market purchase | 35.0K | $17.62 | $617K |
| 2026-04-29 | ZBIO | Zenas BioPharma, Inc. | P — Open-market purchase | 25.0K | $18.02 | $450K |
| 2026-04-01 | ZBIO | Zenas BioPharma, Inc. | P — Open-market purchase | 34.0K | $19.31 | $657K |
| 2026-04-01 | ZBIO | Zenas BioPharma, Inc. | P — Open-market purchase | 20.0K | $18.23 | $365K |
| 2026-02-03 | ZBIO | Zenas BioPharma, Inc. | P — Open-market purchase | 57.0K | $17.96 | $1.02M |
| 2025-10-07 | ZBIO | Zenas BioPharma, Inc. | P — Open-market purchase | 36.9K | $20.85 | $770K |
| 2025-06-18 | ZLAB | Zai Lab Ltd | A — Grant or award | 10.8K | $0.00 | |
| 2024-12-04 | ZBIO | Zenas BioPharma, Inc. | P — Open-market purchase | 45.0K | $9.98 | $449K |
| 2024-12-04 | ZBIO | Zenas BioPharma, Inc. | P — Open-market purchase | 25.0K | $10.76 | $269K |
| 2024-11-20 | ZBIO | Zenas BioPharma, Inc. | P — Open-market purchase | 2.5K | $14.57 | $36K |
| 2024-11-20 | ZBIO | Zenas BioPharma, Inc. | P — Open-market purchase | 7.5K | $15.00 | $112K |
Leon O Moulder Jr is a corporate executive known for his roles in the biopharmaceutical industry, particularly as the Chief Executive Officer and Director at Zenas BioPharma, Inc. He has been involved in the development of innovative therapies for autoimmune diseases.…
4 primary Form 4 filings in the last 90 days, covering 2 companies.
Recorded transactions: 11 open-market purchases ($5.76M) and 0 open-market sales () across all tracked filings.
Across 8 tracked purchases, MOULDER LEON O JR averaged +65.9% avg 30-day return with a 2500% 30-day win rate. InsiderAlpha rates the track record at 1/5 stars.
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.
Open the live MOULDER LEON O JR profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.