ZBIO — Zenas BioPharma, Inc.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
Others in Healthcare
Measured signals that fired on ZBIO
| date | signal | measured base rate |
|---|---|---|
| 2026-07-17 | Equal highs taken out structure | -0.70% over 21 days · t = -8.28 · n = 68,636 statistically distinguishable from its control group |
| 2026-06-22 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-05-21 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-05-18 | Conviction buy by an officer insider | -1.03% over 21 days · t = -2.24 · n = 1,083 statistically distinguishable from its control group |
| 2026-04-24 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-03-27 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-05-18 | MOULDER LEON O JR Chief Executive Officer | Open-market purchase | 60.0K | 16.88 | 1.0M |
| 2026-04-29 | MOULDER LEON O JR Chief Executive Officer | Open-market purchase | 35.0K | 17.62 | 616.7K |
| 2026-04-28 | MOULDER LEON O JR Chief Executive Officer | Open-market purchase | 25.0K | 18.02 | 450.5K |
| 2026-03-31 | Harwin Peter Evan Director | Open-market purchase | 150.0K | 20.00 | 3.0M |
| 2026-03-31 | Kiselak Tomas Director | Open-market purchase | 150.0K | 20.00 | 3.0M |
| 2026-03-31 | Fairmount Funds Management LLC Director | Open-market purchase | 150.0K | 20.00 | 3.0M |
| 2026-03-31 | Fairmount Healthcare Fund II L.P. Director | Open-market purchase | 150.0K | 20.00 | 3.0M |
| 2026-03-31 | Lu Hongbo Director | Open-market purchase | 75.0K | 20.00 | 1.5M |
| 2026-03-31 | MOULDER LEON O JR Chief Executive Officer | Open-market purchase | 34.0K | 19.31 | 656.5K |
| 2026-03-31 | Lu Hongbo Director | Open-market purchase | 3.8K | 18.63 | 70.2K |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| FMR LLC | 177.6M | 9.1M |
| SR One Capital Management, LP | 98.5M | 5.0M |
| NEA Management Company, LLC | 78.7M | 4.0M |
| ENAVATE SCIENCES GP, LLC | 76.6M | 3.9M |
| FEDERATED HERMES, INC. | 61.1M | 3.1M |
| Polar Capital Holdings Plc | 49.8M | 2.5M |
| Capital International Investors | 47.6M | 2.4M |
| Fairmount Funds Management LLC | 46.1M | 2.4M |
| BlackRock, Inc. | 39.8M | 2.0M |
| NVP ASSOCIATES, LLC | 35.9M | 1.8M |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- Zenas Biopharma, Inc. (ZBIO) filed form 8-K · 2026-08-13 · SEC EDGAR
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