| $350M | ||
| $217M | ||
| $172M | ||
| $109M | ||
| $107M | ||
| $104M |
Buys | $12,988,664 | 16 | 100 |
Sells | $0 | 0 | 0 |
| MOULDER LEON O JR | Chief Executive Officer | 9 | $5.76M | 0 | $0 | $5.76M |
| Lu Hongbo | director | 4 | $3.73M | 0 | $0 | $3.73M |
| Fairmount Funds Management LLC | director | 1 | $3M | 0 | $0 | $3M |
| Allen Patricia L | director | 2 | $499,746 | 0 | $0 | $499,746 |
Zenas BioPharma, Inc. functions as a clinical-stage biopharmaceutical firm, concentrating on the creation and market introduction of innovative, immunology-based treatments. The company's primary investigational therapy is obexelimab, a distinctive bifunctional monoclonal antibody intended to address multiple diseases such as immunoglobulin G4-related disease, multiple sclerosis, systemic lupus erythematosus, and warm autoimmune hemolytic anemia. Its developmental portfolio also features ZB002, an anti-TNFa monoclonal antibody; ZB004, a …
Over the last 12 months, insiders at Zenas BioPharma, Inc. have bought $12.99M and sold $0 worth of Zenas BioPharma, Inc. stock.
On average, over the past 5 years, insiders at Zenas BioPharma, Inc. have bought $10.91M and sold $0 worth of stock each year.
Highest buying activity among insiders over the last 12 months: MOULDER LEON O JR (Chief Executive Officer) — $5.76M. Lu Hongbo (director) — $3.73M. Fairmount Funds Management LLC (director) — $3M.
The last purchase of 60,000 shares for transaction amount of $1.01M was made by MOULDER LEON O JR (Chief Executive Officer) on 2026‑05‑18.
| 2026-05-18 | MOULDER LEON O JR | Chief Executive Officer | 60,000 0.1237% | $16.88 | $1.01M | +67.00% | ||
| 2026-04-29 | MOULDER LEON O JR | Chief Executive Officer | 35,000 0.0767% | $17.62 | $616,700 | +59.03% | ||
| 2026-04-28 | MOULDER LEON O JR | Chief Executive Officer | 25,000 0.056% | $18.02 | $450,500 | +54.80% | ||
| 2026-03-31 | Fairmount Funds Management LLC | director | 150,000 0.3437% | $20.00 | $3M | +38.62% | ||
| 2026-03-31 | MOULDER LEON O JR | Chief Executive Officer | 34,000 0.0752% | $19.31 | $656,540 | +38.62% | ||
| 2026-03-31 | Lu Hongbo | director | 78,768 0.1799% | $19.93 | $1.57M | +38.62% | ||
| 2026-03-31 | Lu Hongbo | director | 3,768 0.008% | $18.63 | $70,198 | +38.62% | ||
| 2026-03-31 | Lu Hongbo | director | 75,000 0.1719% | $20.00 | $1.5M | +38.62% | ||
| 2026-03-30 | MOULDER LEON O JR | Chief Executive Officer | 20,000 0.0448% | $18.23 | $364,600 | +47.94% | ||
| 2026-02-13 | Allen Patricia L | director | 4,160 0.0099% | $26.36 | $109,658 | -0.98% | ||
| 2026-02-12 | Allen Patricia L | director | 15,700 0.0357% | $24.85 | $390,088 | +0.11% | ||
| 2026-02-11 | Lu Hongbo | director | 25,985 0.06% | $22.50 | $584,663 | +12.33% | ||
| 2026-02-02 | MOULDER LEON O JR | Chief Executive Officer | 57,000 0.1346% | $17.96 | $1.02M | +43.11% | ||
| 2026-01-09 | MOULDER LEON O JR | Chief Executive Officer | 20,000 0.0491% | $16.55 | $331,000 | +57.84% | ||
| 2026-01-08 | MOULDER LEON O JR | Chief Executive Officer | 30,000 0.0711% | $16.30 | $489,000 | +54.54% | ||
| 2026-01-07 | MOULDER LEON O JR | Chief Executive Officer | 50,000 0.1194% | $16.38 | $819,000 | +53.48% | ||
| 2025-10-09 | SR ONE CAPITAL MANAGEMENT, LLC | 10 percent owner | 126,315 0.2053% | $19.00 | $2.4M | -5.08% | ||
| 2025-10-09 | ENRIGHT PATRICK G | director | 117,255 0.1925% | $19.19 | $2.25M | -5.08% | ||
| 2025-10-09 | Nunn Jason Raleigh | director | 63,158 0.1027% | $19.00 | $1.2M | -5.08% | ||
| 2025-10-07 | Fairmount Funds Management LLC | director | 316,219 0.6843% | $19.00 | $6.01M | +26.38% |
| Fairmount Funds Management LLC | director | 2359025 3.6194% | $66.95M | 2 | 0 | +26.38% |
| Lu Hongbo | director | 422968 0.649% | $12M | 6 | 0 | <0.0001% |
| MOULDER LEON O JR | Chief Executive Officer | 96928 0.1487% | $2.75M | 15 | 0 | +18.45% |
| Allen Patricia L | director | 19860 0.0305% | $563,626.80 | 2 | 0 | |
| SR ONE CAPITAL MANAGEMENT, LLC | 10 percent owner | 1917895 2.9426% | $54.43M | 1 | 0 | <0.0001% |
| ENRIGHT PATRICK G | director | 1832669 2.8118% | $52.01M | 1 | 0 | <0.0001% |
| Nunn Jason Raleigh | director | 1173395 1.8003% | $33.3M | 1 | 0 | <0.0001% |
| Xiao Ting | director | 10000 0.0153% | $283,800.00 | 1 | 0 | +107.85% |
$8,217,280 | 112 | 46.33% | $1.6B | |
$607,395,062 | 99 | 4.23% | $1.88B | |
$47,419,530 | 58 | 17.20% | $1.96B | |
$1,376,668 | 53 | 18.46% | $2.1B | |
$61,893,001 | 38 | 19.63% | $1.89B |
| Increased Positions | 82 | +110.81% | 10M | +28.58% |
| Decreased Positions | 32 | -43.24% | 3M | -9.23% |
| New Positions | 46 | New | 3M | New |
| Sold Out Positions | 8 | Sold Out | 2M | Sold Out |
| Total Postitions | 124 | +67.57% | 42M | +19.35% |
| Sr One Capital Management, Lp | $169,448.00 | 9.1% | 4.91M | 0 | 0% | 2025-09-30 |
| Fmr Llc | $166,303.00 | 8.93% | 4.82M | +1M | +45.04% | 2025-09-30 |
| Enavate Sciences Gp, Llc | $129,767.00 | 6.97% | 3.76M | 0 | 0% | 2025-09-30 |
| Nea Management Company, Llc | $94,313.00 | 5.06% | 2.73M | 0 | 0% | 2025-09-30 |
| Novo Holdings A/S | $69,000.00 | 3.7% | 2M | -250,000 | -11.11% | 2025-09-30 |
| Fairmount Funds Management Llc | $65,302.00 | 3.51% | 1.89M | 0 | 0% | 2025-09-30 |
| Federated Hermes, Inc. | $64,233.00 | 3.45% | 1.86M | 0 | 0% | 2025-09-30 |
| Nvp Associates, Llc | $63,428.00 | 3.41% | 1.84M | 0 | 0% | 2025-09-30 |
| Deerfield Management Company, L.P. | $53,921.00 | 2.89% | 1.56M | 0 | 0% | 2025-09-30 |
| Blackrock, Inc. | $42,388.00 | 2.28% | 1.23M | +133,032 | +12.14% | 2025-09-30 |