ZBIOZenas BioPharma, Inc.
- Market cap
- $1.75B
- as of 2026-10-23
- Latest close
- $26.87
- as of 2026-10-23
- Sector
- Healthcare
- as of 2026-10-24
- Industry
- Biotechnology
- as of 2026-10-24
Cluster
No cluster in the last 90 days under the default rule (14d · ≥2 insiders · all roles).
Form 4 historysince 2024-09-16
Dashed line = amended filing (Form 4/A)
| Insider | Traded | Filed | Type | Shares | Price | Value | Owned after | 10b5-1 plan | Filing |
|---|---|---|---|---|---|---|---|---|---|
| Oliger Christy J. | Sep 1 | Sep 2 | A · derivative | 37,000 | $31.98 | $1,183,260 | 37,000 | No | Form 4 |
| Fox Jennifer A.See Remarks | Jun 15 | Jun 17 | A · derivative | 125,000 | $18.71 | $2,338,750 | 125,000 | No | Form 4 |
| Farmer Joseph LSee Remarks | Jun 15 | Jun 17 | A · derivative | 175,000 | $18.71 | $3,274,250 | 175,000 | No | Form 4 |
| Enright Patrick G | Jun 15 | Jun 17 | A · derivative | 18,500 | $18.71 | $346,135 | 18,500 | No | Form 4 |
| Boylan James P | Jun 15 | Jun 17 | A · derivative | 18,500 | $18.71 | $346,135 | 18,500 | No | Form 4 |
| Allen Patricia L | Jun 15 | Jun 17 | A · derivative | 18,500 | $18.71 | $346,135 | 18,500 | No | Form 4 |
| von Moltke LisaSee Remarks | Jun 15 | Jun 17 | A · derivative | 150,000 | $18.71 | $2,806,500 | 150,000 | No | Form 4 |
| Orloff John J | Jun 15 | Jun 17 | A · derivative | 18,500 | $18.71 | $346,135 | 18,500 | No | Form 4 |
| Moulder Leon O JrSee Remarks | Jun 15 | Jun 17 | A · derivative | 500,000 | $18.71 | $9,355,000 | 500,000 | No | Form 4 |
| Lu Hongbo | Jun 15 | Jun 17 | A · derivative | 18,500 | $18.71 | $346,135 | 18,500 | No | Form 4 |
| Nunn Jason Raleigh | Jun 15 | Jun 17 | A · derivative | 18,500 | $18.71 | $346,135 | 18,500 | No | Form 4 |
| Fox Jennifer A.See Remarks | Feb 5 | Jun 17 | A | 1,592 | $13.35 | $21,253 | 1,592 | No | Form 4 |
| Farmer Joseph LSee Remarks | Feb 5 | Jun 17 | A | 974 | $13.35 | $13,003 | 974 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | May 18 | May 18 | P | 60,000 | $16.88 | Purchase +$1,012,800 | 96,928 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Apr 29 | Apr 29 | P | 35,000 | $17.62 | Purchase +$616,700 | 1,786,039 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Apr 28 | Apr 29 | P | 25,000 | $18.02 | Purchase +$450,500 | 1,751,039 | No | Form 4 |
| Lu Hongbo | Mar 31 | Apr 2 | P | 3,768 | $18.63 | Purchase +$70,198 | 426,736 | No | Form 4 |
| Kiselak Tomas | Mar 31 | Apr 1 | P | 150,000 | $20.00 | Purchase +$3,000,000 | 2,359,025 | No | Form 4 |
| Lu Hongbo | Mar 31 | Mar 31 | P | 75,000 | $20.00 | Purchase +$1,500,000 | 422,968 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Mar 31 | Mar 31 | P | 34,000 | $19.31 | Purchase +$656,540 | 1,726,039 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Mar 30 | Mar 31 | P | 20,000 | $18.23 | Purchase +$364,600 | 1,692,039 | No | Form 4 |
| Allen Patricia L | Feb 13 | Feb 13 | P | 4,160 | $26.36 | Purchase +$109,658 | 19,860 | No | Form 4 |
| Allen Patricia L | Feb 12 | Feb 13 | P | 5,000 | $23.77 | Purchase +$118,850 | 5,000 | No | Form 4 |
| Allen Patricia L | Feb 12 | Feb 13 | P | 5,700 | $24.34 | Purchase +$138,738 | 10,700 | No | Form 4 |
| Allen Patricia L | Feb 12 | Feb 13 | P | 5,000 | $26.50 | Purchase +$132,500 | 15,700 | No | Form 4 |
| Lu Hongbo | Feb 11 | Feb 13 | P | 25,985 | $22.50 | Purchase +$584,663 | 347,968 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Feb 2 | Feb 3 | P | 57,000 | $17.96 | Purchase +$1,023,720 | 423,155 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Jan 9 | Jan 9 | P | 20,000 | $16.55 | Purchase +$331,000 | 366,155 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Jan 8 | Jan 9 | P | 30,000 | $16.30 | Purchase +$489,000 | 346,155 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Jan 7 | Jan 9 | P | 50,000 | $16.38 | Purchase +$819,000 | 316,155 | No | Form 4 |
| Enright Patrick G | Oct 9, 2025 | Oct 14, 2025 | P | 105,265 | $19.00 | Purchase +$2,000,035 | 1,832,669 | No | Form 4 |
| Enright Patrick G | Oct 9, 2025 | Oct 14, 2025 | P | 11,990 | $20.85 | Purchase +$249,992 | 11,990 | No | Form 4 |
| Sr One Capital Management, LLC | Oct 9, 2025 | Oct 14, 2025 | P | 63,158 | $19.00 | Purchase +$1,200,002 | 1,173,395 | No | Form 4 |
| Sr One Capital Management, LLC | Oct 9, 2025 | Oct 14, 2025 | P | 63,157 | $19.00 | Purchase +$1,199,983 | 1,917,895 | No | Form 4 |
| Nunn Jason Raleigh | Oct 9, 2025 | Oct 14, 2025 | P | 63,158 | $19.00 | Purchase +$1,200,002 | 1,173,395 | No | Form 4 |
| Lu Hongbo | Oct 7, 2025 | Oct 9, 2025 | P | 263,160 | $19.00 | Purchase +$5,000,040 | 321,983 | No | Form 4 |
| Harwin Peter Evan | Oct 7, 2025 | Oct 9, 2025 | P | 316,219 | $19.00 | Purchase +$6,008,161 | 2,209,025 | No | Form 4 |
| Moulder Leon O JrSee Remarks | Oct 7, 2025 | Oct 9, 2025 | P | 36,928 | $20.85 | Purchase +$769,949 | 36,928 | No | Form 4 |
| Lu Hongbo | Sep 13, 2024 | Oct 9, 2025 | P | 58,823 | $17.00 | Purchase +$999,991 | 58,823 | No | Form 4 |
| Nunn Jason Raleigh | Jun 10, 2025 | Jun 12, 2025 | A · derivative | 18,500 | $11.94 | $220,890 | 18,500 | No | Form 4 |
| Moulder Leon O JrSee Remarks | Jun 10, 2025 | Jun 12, 2025 | A · derivative | 400,000 | $11.94 | $4,776,000 | 400,000 | No | Form 4 |
| Lu Hongbo | Jun 10, 2025 | Jun 12, 2025 | A · derivative | 18,500 | $11.94 | $220,890 | 18,500 | No | Form 4 |
| Orloff John J | Jun 10, 2025 | Jun 12, 2025 | A · derivative | 18,500 | $11.94 | $220,890 | 18,500 | No | Form 4 |
| Enright Patrick G | Jun 10, 2025 | Jun 12, 2025 | A · derivative | 18,500 | $11.94 | $220,890 | 18,500 | No | Form 4 |
| Fairmount Healthcare Fund II L.P. | Jun 10, 2025 | Jun 12, 2025 | A · derivative | 18,500 | $11.94 | $220,890 | 18,500 | No | Form 4 |
| Farmer Joseph LSee Remarks | Jun 10, 2025 | Jun 12, 2025 | A · derivative | 175,000 | $11.94 | $2,089,500 | 175,000 | No | Form 4 |
| Allen Patricia L | Jun 10, 2025 | Jun 12, 2025 | A · derivative | 18,500 | $11.94 | $220,890 | 18,500 | No | Form 4 |
| Boylan James P | Jun 10, 2025 | Jun 12, 2025 | A · derivative | 18,500 | $11.94 | $220,890 | 18,500 | No | Form 4 |
| Oliveira OrlandoSee Remarks | Jun 10, 2025 | Jun 12, 2025 | A · derivative | 100,000 | $11.94 | $1,194,000 | 100,000 | No | Form 4 |
| Fox Jennifer A.See Remarks | Jun 10, 2025 | Jun 12, 2025 | A · derivative | 150,000 | $11.94 | $1,791,000 | 150,000 | No | Form 4 |
| Xiao Ting | Feb 7, 2025 | Apr 28, 20254/A | P | 10,000 | $7.76 | Purchase +$77,600 | 10,000 | No | Form 4/A |
| von Moltke LisaSee Remarks | Apr 15, 2025 | Apr 17, 2025 | A · derivative | 400,000 | $8.72 | $3,488,000 | 400,000 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Feb 18, 2025 | Feb 19, 2025 | P | 25,000 | $6.67 | Purchase +$166,750 | 266,155 | No | Form 4 |
| Oliveira OrlandoChief Commercial Officer | Dec 16, 2024 | Dec 18, 2024 | A · derivative | 7,775 | $8.77 | $68,187 | 7,775 | No | Form 4 |
| Fox Jennifer A.See Remarks | Dec 16, 2024 | Dec 18, 2024 | A · derivative | 8,125 | $8.77 | $71,256 | 8,125 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Dec 4, 2024 | Dec 4, 2024 | P | 45,000 | $9.98 | Purchase +$449,100 | 241,155 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Dec 3, 2024 | Dec 4, 2024 | P | 25,000 | $10.76 | Purchase +$269,000 | 196,155 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Nov 19, 2024 | Nov 20, 2024 | P | 2,500 | $14.57 | Purchase +$36,425 | 171,155 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Nov 18, 2024 | Nov 20, 2024 | P | 7,500 | $15.00 | Purchase +$112,500 | 168,655 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Sep 20, 2024 | Sep 20, 2024 | P | 2,367 | $17.88 | Purchase +$42,322 | 1,669,406 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Sep 20, 2024 | Sep 20, 2024 | P | 2,633 | $18.97 | Purchase +$49,948 | 1,672,039 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Sep 19, 2024 | Sep 20, 2024 | P | 5,000 | $17.89 | Purchase +$89,450 | 1,667,039 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Sep 18, 2024 | Sep 20, 2024 | P | 10,000 | $17.91 | Purchase +$179,100 | 1,662,039 | No | Form 4 |
| Wellington Biomedical Innovation Master Investors (Cayman) I L.P. | Sep 16, 2024 | Sep 18, 2024 | C | 180,635 | not reported | not reported | 180,635 | No | Form 4 |
| Wellington Biomedical Innovation Master Investors (Cayman) I L.P. | Sep 16, 2024 | Sep 18, 2024 | C | 420,271 | not reported | not reported | 600,906 | No | Form 4 |
| Wellington Biomedical Innovation Master Investors (Cayman) I L.P. | Sep 16, 2024 | Sep 18, 2024 | C | 200,718 | not reported | not reported | 801,624 | No | Form 4 |
| Wellington Biomedical Innovation Master Investors (Cayman) I L.P. | Sep 16, 2024 | Sep 18, 2024 | C · derivative | 1,568,480 | not reported | not reported | not reported | No | Form 4 |
| Wellington Biomedical Innovation Master Investors (Cayman) I L.P. | Sep 16, 2024 | Sep 18, 2024 | C · derivative | 3,649,263 | not reported | not reported | not reported | No | Form 4 |
| Wellington Biomedical Innovation Master Investors (Cayman) I L.P. | Sep 16, 2024 | Sep 18, 2024 | C · derivative | 1,742,858 | not reported | not reported | not reported | No | Form 4 |
| Zebra Aggregator, LP | Sep 16, 2024 | Sep 18, 2024 | C | 2,879,006 | not reported | not reported | 2,879,006 | No | Form 4 |
| Zebra Aggregator, LP | Sep 16, 2024 | Sep 18, 2024 | P | 882,353 | $17.00 | Purchase +$15,000,001 | 3,761,359 | No | Form 4 |
| Zebra Aggregator, LP | Sep 16, 2024 | Sep 18, 2024 | C · derivative | 10,474,889 | not reported | not reported | not reported | No | Form 4 |
| Zebra Aggregator, LP | Sep 16, 2024 | Sep 18, 2024 | C · derivative | 14,523,821 | not reported | not reported | not reported | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Sep 16, 2024 | Sep 17, 20244/A | C | 164,523 | not reported | not reported | 1,280,022 | No | Form 4/A |
| Moulder Leon O JrChief Executive Officer | Sep 16, 2024 | Sep 17, 20244/A | C | 108,381 | not reported | not reported | 112,901 | No | Form 4/A |
| Moulder Leon O JrChief Executive Officer | Sep 16, 2024 | Sep 17, 20244/A | C | 372,017 | not reported | not reported | 1,652,039 | No | Form 4/A |
| Moulder Leon O JrChief Executive Officer | Sep 16, 2024 | Sep 17, 20244/A | C | 48,254 | not reported | not reported | 161,155 | No | Form 4/A |
| Moulder Leon O JrChief Executive Officer | Sep 16, 2024 | Sep 17, 20244/A | C · derivative | 1,428,571 | not reported | not reported | not reported | No | Form 4/A |
| Moulder Leon O JrChief Executive Officer | Sep 16, 2024 | Sep 17, 20244/A | C · derivative | 941,088 | not reported | not reported | not reported | No | Form 4/A |
| Moulder Leon O JrChief Executive Officer | Sep 16, 2024 | Sep 17, 20244/A | C · derivative | 3,230,268 | not reported | not reported | not reported | No | Form 4/A |
| Moulder Leon O JrChief Executive Officer | Sep 16, 2024 | Sep 17, 20244/A | C · derivative | 418,996 | not reported | not reported | not reported | No | Form 4/A |
| Fairmount Funds Management LLC | Sep 16, 2024 | Sep 17, 20244/A | C | 41,130 | not reported | not reported | 329,045 | No | Form 4/A |
| Fairmount Funds Management LLC | Sep 16, 2024 | Sep 17, 20244/A | C | 252,890 | not reported | not reported | 581,935 | No | Form 4/A |
| Fairmount Funds Management LLC | Sep 16, 2024 | Sep 17, 20244/A | C | 709,794 | not reported | not reported | 1,291,729 | No | Form 4/A |
| Fairmount Funds Management LLC | Sep 16, 2024 | Sep 17, 20244/A | C | 301,077 | not reported | not reported | 1,592,806 | No | Form 4/A |
| Fairmount Funds Management LLC | Sep 16, 2024 | Sep 17, 20244/A | P | 300,000 | $17.00 | Purchase +$5,100,000 | 1,892,806 | No | Form 4/A |
| Fairmount Funds Management LLC | Sep 16, 2024 | Sep 17, 20244/A | C · derivative | 357,143 | not reported | not reported | not reported | No | Form 4/A |
| Fairmount Funds Management LLC | Sep 16, 2024 | Sep 17, 20244/A | C · derivative | 2,195,871 | not reported | not reported | not reported | No | Form 4/A |
| Fairmount Funds Management LLC | Sep 16, 2024 | Sep 17, 20244/A | C · derivative | 6,163,236 | not reported | not reported | not reported | No | Form 4/A |
| Fairmount Funds Management LLC | Sep 16, 2024 | Sep 17, 20244/A | C · derivative | 2,614,287 | not reported | not reported | not reported | No | Form 4/A |
| Lu Hongbo | Sep 13, 2024 | Sep 17, 2024 | P | 58,823 | $17.00 | Purchase +$999,991 | 58,823 | No | Form 4 |
| Moulder Leon O JrChief Executive Officer | Sep 12, 2024 | Sep 17, 20244/A | A · derivative | 1,486,000 | $17.00 | $25,262,000 | 1,486,000 | No | Form 4/A |
| Fairmount Funds Management LLC | Sep 12, 2024 | Sep 17, 20244/A | A · derivative | 37,000 | $17.00 | $629,000 | 37,000 | No | Form 4/A |
| Sr One Capital Management, LLC | Sep 16, 2024 | Sep 16, 2024 | C | 1,505,388 | not reported | not reported | 1,505,388 | No | Form 4 |
| Sr One Capital Management, LLC | Sep 16, 2024 | Sep 16, 2024 | P | 441,176 | $17.00 | Purchase +$7,499,992 | 1,946,564 | No | Form 4 |
| Sr One Capital Management, LLC | Sep 16, 2024 | Sep 16, 2024 | C | 501,796 | not reported | not reported | 501,796 | No | Form 4 |
| Sr One Capital Management, LLC | Sep 16, 2024 | Sep 16, 2024 | P | 1,352,942 | $17.00 | Purchase +$23,000,014 | 1,854,738 | No | Form 4 |
| Sr One Capital Management, LLC | Sep 16, 2024 | Sep 16, 2024 | C | 669,061 | not reported | not reported | 669,061 | No | Form 4 |
| Sr One Capital Management, LLC | Sep 16, 2024 | Sep 16, 2024 | P | 441,176 | $17.00 | Purchase +$7,499,992 | 1,110,237 | No | Form 4 |
| Sr One Capital Management, LLC | Sep 16, 2024 | Sep 16, 2024 | C · derivative | 13,071,439 | not reported | not reported | not reported | No | Form 4 |
| Sr One Capital Management, LLC | Sep 16, 2024 | Sep 16, 2024 | C · derivative | 4,357,146 | not reported | not reported | not reported | No | Form 4 |
| Sr One Capital Management, LLC | Sep 16, 2024 | Sep 16, 2024 | C · derivative | 5,809,528 | not reported | not reported | not reported | No | Form 4 |
| Nunn Jason Raleigh | Sep 16, 2024 | Sep 16, 2024 | C | 1,505,388 | not reported | not reported | 1,505,388 | No | Form 4 |
| Nunn Jason Raleigh | Sep 16, 2024 | Sep 16, 2024 | P | 441,176 | $17.00 | Purchase +$7,499,992 | 1,946,564 | No | Form 4 |
| Nunn Jason Raleigh | Sep 16, 2024 | Sep 16, 2024 | C | 669,061 | not reported | not reported | 669,061 | No | Form 4 |
| Nunn Jason Raleigh | Sep 16, 2024 | Sep 16, 2024 | P | 441,176 | $17.00 | Purchase +$7,499,992 | 1,110,237 | No | Form 4 |
| Nunn Jason Raleigh | Sep 16, 2024 | Sep 16, 2024 | C · derivative | 13,071,439 | not reported | not reported | not reported | No | Form 4 |
| Nunn Jason Raleigh | Sep 16, 2024 | Sep 16, 2024 | C · derivative | 5,809,528 | not reported | not reported | not reported | No | Form 4 |
| Enright Patrick G | Sep 16, 2024 | Sep 16, 2024 | C | 723,812 | not reported | not reported | 723,812 | No | Form 4 |
| Enright Patrick G | Sep 16, 2024 | Sep 16, 2024 | C | 1,003,592 | not reported | not reported | 1,727,404 | No | Form 4 |
| Enright Patrick G | Sep 16, 2024 | Sep 16, 2024 | C | 334,530 | not reported | not reported | 334,530 | No | Form 4 |
| Enright Patrick G | Sep 16, 2024 | Sep 16, 2024 | P | 440,000 | $17.00 | Purchase +$7,480,000 | 774,530 | No | Form 4 |
| Enright Patrick G | Sep 16, 2024 | Sep 16, 2024 | C · derivative | 6,284,933 | not reported | not reported | not reported | No | Form 4 |
| Enright Patrick G | Sep 16, 2024 | Sep 16, 2024 | C · derivative | 8,714,293 | not reported | not reported | not reported | No | Form 4 |
| Enright Patrick G | Sep 16, 2024 | Sep 16, 2024 | C · derivative | 2,904,764 | not reported | not reported | not reported | No | Form 4 |
| Nunn Jason Raleigh | Sep 12, 2024 | Sep 16, 2024 | A · derivative | 37,000 | $17.00 | $629,000 | 37,000 | No | Form 4 |
| Fox Jennifer A.See Remarks | Sep 12, 2024 | Sep 16, 2024 | A · derivative | 155,000 | $17.00 | $2,635,000 | 155,000 | No | Form 4 |
| Farmer Joseph LSee Remarks | Sep 12, 2024 | Sep 16, 2024 | A · derivative | 206,000 | $17.00 | $3,502,000 | 206,000 | No | Form 4 |
| Oliveira OrlandoChief Commercial Officer | Sep 12, 2024 | Sep 16, 2024 | A · derivative | 410,000 | $17.00 | $6,970,000 | 410,000 | No | Form 4 |
| Boylan James P | Sep 12, 2024 | Sep 16, 2024 | A · derivative | 37,000 | $17.00 | $629,000 | 37,000 | No | Form 4 |
| Enright Patrick G | Sep 12, 2024 | Sep 16, 2024 | A · derivative | 37,000 | $17.00 | $629,000 | 37,000 | No | Form 4 |
| Allen Patricia L | Sep 12, 2024 | Sep 16, 2024 | A · derivative | 18,500 | $17.00 | $314,500 | 18,500 | No | Form 4 |
| Lu Hongbo | Sep 12, 2024 | Sep 16, 2024 | A · derivative | 37,000 | $17.00 | $629,000 | 37,000 | No | Form 4 |
| Xiao Ting | Sep 12, 2024 | Sep 16, 2024 | A · derivative | 37,000 | $17.00 | $629,000 | 37,000 | No | Form 4 |
| Orloff John J | Sep 12, 2024 | Sep 16, 2024 | A · derivative | 18,500 | $17.00 | $314,500 | 18,500 | No | Form 4 |