Zenas BioPharma, Inc. ($ZBIO) Insider Transactions

Last updated: 2026-04-02 23:06 UTC | Total transactions: 129

In the last 12 months, insiders at Zenas BioPharma, Inc. ($ZBIO) filed 129 transactions with the SEC: 44 open-market purchases totaling $116,196,389 and 0 sales totaling $0. Net insider sentiment: net buying.

Zenas BioPharma, Inc. operates in the Pharmaceutical preparations industry (Life sciences sector).

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Recent Insider Transactions

Transaction Date Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
March 31, 2026 Lu Hongbo Director P Common Stock 3768 $18.63 426,736.0000 44,730,052 0.89% 0.01%
March 31, 2026 Fairmount Funds Management LLC Director P Common Stock 150000 $20.00 2,359,025.0000 44,730,052 6.79% 0.34%
March 30, 2026 MOULDER LEON O JR Chief Executive Officer P Common Stock 20000 $18.23 2,152,122.0000 44,730,052 0.94% 0.04%
March 31, 2026 MOULDER LEON O JR Chief Executive Officer P Common Stock 34000 $19.31 2,186,122.0000 44,730,052 1.58% 0.08%
March 31, 2026 Lu Hongbo Director P Common Stock 75000 $20.00 422,968.0000 44,730,052 21.55% 0.17%
Feb. 12, 2026 Allen Patricia L Director P Common Stock 5000 $23.77 5,000.0000 42,159,340 9999.99% 0.01%
Feb. 12, 2026 Allen Patricia L Director P Common Stock 5700 $24.34 10,700.0000 42,159,340 114.00% 0.01%
Feb. 12, 2026 Allen Patricia L Director P Common Stock 5000 $26.50 15,700.0000 42,159,340 46.73% 0.01%
Feb. 13, 2026 Allen Patricia L Director P Common Stock 4160 $26.36 19,860.0000 42,159,340 26.50% 0.01%
Feb. 11, 2026 Lu Hongbo Director P Common Stock 25985 $22.50 347,968.0000 42,159,340 8.07% 0.06%
Feb. 2, 2026 MOULDER LEON O JR Chief Executive Officer P Common Stock 57000 $17.96 2,132,122.0000 42,159,340 2.75% 0.14%
Jan. 9, 2026 MOULDER LEON O JR Chief Executive Officer P Common Stock 20000 $16.55 2,075,122.0000 42,159,340 0.97% 0.05%
Jan. 8, 2026 MOULDER LEON O JR Chief Executive Officer P Common Stock 30000 $16.30 2,055,122.0000 42,159,340 1.48% 0.07%
Jan. 7, 2026 MOULDER LEON O JR Chief Executive Officer P Common Stock 50000 $16.38 2,025,122.0000 42,159,340 2.53% 0.12%
Oct. 9, 2025 ENRIGHT PATRICK G Not found P Common Stock 11990 $20.85 2,619,189.0000 42,159,340 0.46% 0.03%
Oct. 9, 2025 Nunn Jason Raleigh Not found P Common Stock 63158 $19.00 3,119,959.0000 42,159,340 2.07% 0.15%
Oct. 9, 2025 SR ONE CAPITAL MANAGEMENT, LLC Not found P Common Stock 63158 $19.00 5,037,854.0000 42,159,340 1.27% 0.15%
Oct. 9, 2025 SR ONE CAPITAL MANAGEMENT, LLC Not found P Common Stock 63157 $19.00 5,037,854.0000 42,159,340 1.27% 0.15%
Oct. 9, 2025 ENRIGHT PATRICK G Not found P Common Stock 105265 $19.00 2,619,189.0000 42,159,340 4.19% 0.25%
Oct. 7, 2025 Lu Hongbo Director P Common Stock 263160 $19.00 321,983.0000 42,159,340 447.38% 0.62%
Oct. 7, 2025 MOULDER LEON O JR See Remarks P Common Stock 36928 $20.85 1,975,122.0000 42,159,340 1.91% 0.09%
Oct. 7, 2025 Fairmount Funds Management LLC Director P Common Stock 316219 $19.00 2,209,025.0000 42,159,340 16.71% 0.75%
Sept. 13, 2024 Lu Hongbo Director P Common Stock 58823 $17.00 58,823.0000 1,567,269 9999.99% 3.75%
June 10, 2025 ENRIGHT PATRICK G Director A Stock Option (Right to Buy) 18500 $0.00 18,500.0000 41,800,802 9999.99% 0.04%
June 10, 2025 Oliveira Orlando See Remarks A Stock Option (Right to Buy) 100000 $0.00 100,000.0000 41,800,802 9999.99% 0.24%
June 10, 2025 Boylan James P Director A Stock Option (Right to Buy) 18500 $0.00 18,500.0000 41,800,802 9999.99% 0.04%
June 10, 2025 Allen Patricia L Director A Stock Option (Right to Buy) 18500 $0.00 18,500.0000 41,800,802 9999.99% 0.04%
June 10, 2025 Farmer Joseph L See Remarks A Stock Option (Right to Buy) 175000 $0.00 175,000.0000 41,800,802 9999.99% 0.42%
June 10, 2025 Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 18500 $0.00 18,500.0000 41,800,802 9999.99% 0.04%
June 10, 2025 ORLOFF JOHN J Director A Stock Option (Right to Buy) 18500 $0.00 18,500.0000 41,800,802 9999.99% 0.04%
June 10, 2025 Lu Hongbo Director A Stock Option (Right to Buy) 18500 $0.00 18,500.0000 41,800,802 9999.99% 0.04%
June 10, 2025 MOULDER LEON O JR See Remarks A Stock Option (Right to Buy) 400000 $0.00 400,000.0000 41,800,802 9999.99% 0.96%
June 10, 2025 Fox Jennifer A. See Remarks A Stock Option (Right to Buy) 150000 $0.00 150,000.0000 41,800,802 9999.99% 0.36%
June 10, 2025 Nunn Jason Raleigh Not found A Stock Option (Right to Buy) 18500 $0.00 18,500.0000 41,800,802 9999.99% 0.04%
Feb. 7, 2025 Xiao Ting Director P Common Stock 10000 $7.76 10,000.0000 13,198,960 9999.99% 0.08%
April 15, 2025 von Moltke Lisa See Remarks A Stock Option (Right to Buy) 400000 $0.00 400,000.0000 41,800,802 9999.99% 0.96%
Feb. 18, 2025 MOULDER LEON O JR Chief Executive Officer P Common Stock 25000 $6.67 1,938,194.0000 13,198,960 1.31% 0.19%
Feb. 7, 2025 Xiao Ting Director P Common Stock 10000 $7.76 47,000.0000 13,198,960 27.03% 0.08%
Dec. 16, 2024 Oliveira Orlando Chief Commercial Officer A Stock Option (Right to Buy) 7775 $0.00 7,775.0000 7,697,695 9999.99% 0.10%
Dec. 16, 2024 Fox Jennifer A. See Remarks A Stock Option (Right to Buy) 8125 $0.00 8,125.0000 7,697,695 9999.99% 0.11%
Dec. 4, 2024 MOULDER LEON O JR Chief Executive Officer P Common Stock 45000 $9.98 1,913,194.0000 7,697,695 2.41% 0.58%
Dec. 3, 2024 MOULDER LEON O JR Chief Executive Officer P Common Stock 25000 $10.76 1,868,194.0000 7,697,695 1.36% 0.32%
Nov. 18, 2024 MOULDER LEON O JR Chief Executive Officer P Common Stock 7500 $15.00 1,840,694.0000 7,697,695 0.41% 0.10%
Nov. 19, 2024 MOULDER LEON O JR Chief Executive Officer P Common Stock 2500 $14.57 1,843,194.0000 7,697,695 0.14% 0.03%
Sept. 20, 2024 MOULDER LEON O JR Chief Executive Officer P Common Stock 2633 $18.97 1,833,194.0000 1,567,269 0.14% 0.17%
Sept. 20, 2024 MOULDER LEON O JR Chief Executive Officer P Common Stock 2367 $17.88 1,830,561.0000 1,567,269 0.13% 0.15%
Sept. 19, 2024 MOULDER LEON O JR Chief Executive Officer P Common Stock 5000 $17.89 1,828,194.0000 1,567,269 0.27% 0.32%
Sept. 18, 2024 MOULDER LEON O JR Chief Executive Officer P Common Stock 10000 $17.91 1,823,194.0000 1,567,269 0.55% 0.64%
Sept. 16, 2024 Enavate Sciences GP, LLC Not found C Series B Preferred Stock 10474889 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Enavate Sciences GP, LLC Not found C Series C Preferred Stock 14523821 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. TenPercentOwner C Common Stock 200718 $0.00 801,624.0000 1,567,269 33.40% 12.81%
Sept. 16, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. TenPercentOwner C Series A Convertible Preferred Stock 1568480 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. TenPercentOwner C Series B Convertible Preferred Stock 3649263 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. TenPercentOwner C Series C Convertible Preferred Stock 1742858 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Enavate Sciences GP, LLC Not found C Common Stock 2879006 $0.00 2,879,006.0000 1,567,269 9999.99% 100.00%
Sept. 16, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. TenPercentOwner C Common Stock 180635 $0.00 180,635.0000 1,567,269 9999.99% 11.53%
Sept. 16, 2024 Wellington Biomedical Innovation Master Investors (Cayman) I L.P. TenPercentOwner C Common Stock 420271 $0.00 600,906.0000 1,567,269 232.66% 26.82%
Sept. 16, 2024 Enavate Sciences GP, LLC Not found P Common Stock 882353 $17.00 3,761,359.0000 1,567,269 30.65% 56.30%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Common Stock 108381 $0.00 1,764,940.0000 1,567,269 6.54% 6.92%
Sept. 13, 2024 Lu Hongbo Director P Common Stock 58823 $17.00 58,823.0000 1,567,269 9999.99% 3.75%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Common Stock 41130 $0.00 329,045.0000 1,567,269 14.29% 2.62%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Common Stock 252890 $0.00 581,935.0000 1,567,269 76.86% 16.14%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Common Stock 709794 $0.00 1,291,729.0000 1,567,269 121.97% 45.29%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Common Stock 301077 $0.00 1,592,806.0000 1,567,269 23.31% 19.21%
Sept. 16, 2024 Fairmount Funds Management LLC Director P Common Stock 300000 $17.00 1,892,806.0000 1,567,269 18.83% 19.14%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Series Seed Convertible Preferred Stock 357143 $0.00 0.0000 1,567,269 100.00% 22.79%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Series A Convertible Preferred Stock 2195871 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Series B Convertible Preferred Stock 6163236 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Series C Convertible Preferred Stock 2614287 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 12, 2024 Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 37000 $0.00 37,000.0000 1,567,269 9999.99% 2.36%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Common Stock 164523 $0.00 1,441,177.0000 1,567,269 12.89% 10.50%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Common Stock 372017 $0.00 1,813,194.0000 1,567,269 25.81% 23.74%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Common Stock 48254 $0.00 1,813,194.0000 1,567,269 2.73% 3.08%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Series Seed Convertible Preferred Stock 1428571 $0.00 0.0000 1,567,269 100.00% 91.15%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Series A Convertible Preferred Stock 941088 $0.00 0.0000 1,567,269 100.00% 60.05%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Series B Convertible Preferred Stock 3230268 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Series B Convertible Preferred Stock 418996 $0.00 0.0000 1,567,269 100.00% 26.73%
Sept. 12, 2024 MOULDER LEON O JR Chief Executive Officer A Stock Option (Right to Buy) 1486000 $0.00 1,486,000.0000 1,567,269 9999.99% 94.82%
Sept. 16, 2024 Nunn Jason Raleigh Not found C Common Stock 1505388 $0.00 2,615,625.0000 1,567,269 135.59% 96.05%
Sept. 12, 2024 Boylan James P Director A Stock Option (Right to Buy) 37000 $0.00 37,000.0000 1,567,269 9999.99% 2.36%
Sept. 12, 2024 ENRIGHT PATRICK G Director A Stock Option (Right to Buy) 37000 $0.00 37,000.0000 1,567,269 9999.99% 2.36%
Sept. 16, 2024 ENRIGHT PATRICK G Director C Series C Convertible Preferred Stock 2904764 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 ENRIGHT PATRICK G Director C Series C Convertible Preferred Stock 8714293 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 ENRIGHT PATRICK G Director C Series B Convertible Preferred Stock 6284933 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 ENRIGHT PATRICK G Director P Common Stock 440000 $17.00 774,530.0000 1,567,269 131.53% 28.07%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Series A Convertible Preferred Stock 2195871 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Series B Convertible Preferred Stock 6163236 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Series C Convertible Preferred Stock 2614287 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 12, 2024 Fairmount Funds Management LLC Director A Stock Option (Right to Buy) 37000 $0.00 37,000.0000 1,567,269 9999.99% 2.36%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Common Stock 164523 $0.00 321,158.0000 1,567,269 105.04% 10.50%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Common Stock 108381 $0.00 644,921.0000 1,567,269 20.20% 6.92%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Common Stock 372017 $0.00 693,175.0000 1,567,269 115.84% 23.74%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Common Stock 48254 $0.00 693,175.0000 1,567,269 7.48% 3.08%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Series Seed Convertible Preferred Stock 1428571 $0.00 0.0000 1,567,269 100.00% 91.15%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Series A Convertible Preferred Stock 941088 $0.00 0.0000 1,567,269 100.00% 60.05%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Series B Convertible Preferred Stock 3230268 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 ENRIGHT PATRICK G Director C Common Stock 334530 $0.00 334,530.0000 1,567,269 9999.99% 21.35%
Sept. 16, 2024 MOULDER LEON O JR Chief Executive Officer C Series B Convertible Preferred Stock 418996 $0.00 0.0000 1,567,269 100.00% 26.73%
Sept. 12, 2024 MOULDER LEON O JR Chief Executive Officer A Stock Option (Right to Buy) 1486000 $0.00 1,486,000.0000 1,567,269 9999.99% 94.82%
Sept. 16, 2024 ENRIGHT PATRICK G Director C Common Stock 723812 $0.00 723,812.0000 1,567,269 9999.99% 46.18%
Sept. 12, 2024 Allen Patricia L Director A Stock Option (Right to Buy) 18500 $0.00 18,500.0000 1,567,269 9999.99% 1.18%
Sept. 12, 2024 Lu Hongbo Director A Stock Option (Right to Buy) 37000 $0.00 37,000.0000 1,567,269 9999.99% 2.36%
Sept. 12, 2024 Xiao Ting Director A Stock Option (Right to Buy) 37000 $0.00 37,000.0000 1,567,269 9999.99% 2.36%
Sept. 12, 2024 ORLOFF JOHN J Director A Stock Option (Right to Buy) 18500 $0.00 18,500.0000 1,567,269 9999.99% 1.18%
Sept. 16, 2024 ENRIGHT PATRICK G Director C Common Stock 1003592 $0.00 1,727,404.0000 1,567,269 138.65% 64.03%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Common Stock 41130 $0.00 41,140.0000 1,567,269 9999.99% 2.62%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Common Stock 252890 $0.00 294,020.0000 1,567,269 614.86% 16.14%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Common Stock 709794 $0.00 1,003,814.0000 1,567,269 241.41% 45.29%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Common Stock 301077 $0.00 1,304,891.0000 1,567,269 29.99% 19.21%
Sept. 16, 2024 Fairmount Funds Management LLC Director P Common Stock 300000 $17.00 1,604,891.0000 1,567,269 22.99% 19.14%
Sept. 16, 2024 Fairmount Funds Management LLC Director C Series Seed Convertible Preferred Stock 357143 $0.00 0.0000 1,567,269 100.00% 22.79%
Sept. 16, 2024 SR ONE CAPITAL MANAGEMENT, LLC Not found C Common Stock 669061 $0.00 4,470,363.0000 1,567,269 17.60% 42.69%
Sept. 16, 2024 SR ONE CAPITAL MANAGEMENT, LLC Not found P Common Stock 441176 $17.00 4,911,539.0000 1,567,269 9.87% 28.15%
Sept. 16, 2024 SR ONE CAPITAL MANAGEMENT, LLC Not found C Series C Convertible Preferred Stock 13071439 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 SR ONE CAPITAL MANAGEMENT, LLC Not found C Series C Convertible Preferred Stock 4357146 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 SR ONE CAPITAL MANAGEMENT, LLC Not found C Series C Convertible Preferred Stock 5809528 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 12, 2024 Farmer Joseph L See Remarks A Stock Option (Right to Buy) 206000 $0.00 206,000.0000 1,567,269 9999.99% 13.14%
Sept. 12, 2024 Fox Jennifer A. See Remarks A Stock Option (Right to Buy) 155000 $0.00 155,000.0000 1,567,269 9999.99% 9.89%
Sept. 16, 2024 SR ONE CAPITAL MANAGEMENT, LLC Not found P Common Stock 1352942 $17.00 4,911,539.0000 1,567,269 38.02% 86.33%
Sept. 16, 2024 SR ONE CAPITAL MANAGEMENT, LLC Not found C Common Stock 501796 $0.00 3,558,597.0000 1,567,269 16.42% 32.02%
Sept. 16, 2024 SR ONE CAPITAL MANAGEMENT, LLC Not found P Common Stock 441176 $17.00 4,911,539.0000 1,567,269 9.87% 28.15%
Sept. 16, 2024 SR ONE CAPITAL MANAGEMENT, LLC Not found C Common Stock 1505388 $0.00 4,470,363.0000 1,567,269 50.77% 96.05%
Sept. 12, 2024 Oliveira Orlando Chief Commercial Officer A Stock Option (Right to Buy) 410000 $0.00 410,000.0000 1,567,269 9999.99% 26.16%
Sept. 16, 2024 Nunn Jason Raleigh Not found C Series C Convertible Preferred Stock 5809528 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 16, 2024 Nunn Jason Raleigh Not found C Series C Convertible Preferred Stock 13071439 $0.00 0.0000 1,567,269 100.00% 100.00%
Sept. 12, 2024 Nunn Jason Raleigh Not found A Stock Option (Right to Buy) 37000 $0.00 37,000.0000 1,567,269 9999.99% 2.36%
Sept. 16, 2024 Nunn Jason Raleigh Not found P Common Stock 441176 $17.00 3,056,801.0000 1,567,269 16.87% 28.15%
Sept. 16, 2024 Nunn Jason Raleigh Not found C Common Stock 669061 $0.00 2,615,625.0000 1,567,269 34.37% 42.69%
Sept. 16, 2024 Nunn Jason Raleigh Not found P Common Stock 441176 $17.00 3,056,801.0000 1,567,269 16.87% 28.15%