Zenas BioPharma, Inc. (ZBIO) Insider Trading
Directors, officers and holders of more than 10% of ZBIO report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 121 transactions on file: 24 with code P, 0 with code S and 26 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 1, 2026 | Oliger Christy J. | Director | A Award | 37,000 | Not measured | Not measured |
| Jun 15, 2026 | Fox Jennifer A. | See Remarks | A Award | 125,000 | Not measured | Not measured |
| Jun 15, 2026 | ORLOFF JOHN J | Director | A Award | 18,500 | Not measured | Not measured |
| Jun 15, 2026 | Boylan James P | Director | A Award | 18,500 | Not measured | Not measured |
| Jun 15, 2026 | ENRIGHT PATRICK G | Director | A Award | 18,500 | Not measured | Not measured |
| Jun 15, 2026 | von Moltke Lisa | See Remarks | A Award | 150,000 | Not measured | Not measured |
| Jun 15, 2026 | Nunn Jason Raleigh | Director | A Award | 18,500 | Not measured | Not measured |
| Jun 15, 2026 | MOULDER LEON O JR | See Remarks | A Award | 500,000 | Not measured | Not measured |
| Jun 15, 2026 | Allen Patricia L | Director | A Award | 18,500 | Not measured | Not measured |
| Jun 15, 2026 | Farmer Joseph L | See Remarks | A Award | 175,000 | Not measured | Not measured |
| Jun 15, 2026 | Lu Hongbo | Director | A Award | 18,500 | Not measured | Not measured |
| May 18, 2026 | MOULDER LEON O JR | See Remarks | P Purchase | 60,000 | $16.88 | $1,012,800 |
| Apr 29, 2026 | MOULDER LEON O JR | See Remarks | P Purchase | 35,000 | $17.62 | $616,700 |
| Apr 28, 2026 | MOULDER LEON O JR | See Remarks | P Purchase | 25,000 | $18.02 | $450,500 |
| Mar 31, 2026 | Fairmount Funds Management LLC | Director | P Purchase | 150,000 | $20.00 | $3,000,000 |
| Mar 31, 2026 | Lu Hongbo | Director | P Purchase | 3,768 | $18.63 | $70,198 |
| Feb 13, 2026 | Allen Patricia L | Director | P Purchase | 4,160 | $26.36 | $109,658 |
| Feb 12, 2026 | Allen Patricia L | Director | P Purchase | 5,000 | $26.50 | $132,500 |
| Feb 12, 2026 | Allen Patricia L | Director | P Purchase | 5,700 | $24.34 | $138,738 |
| Feb 12, 2026 | Allen Patricia L | Director | P Purchase | 5,000 | $23.77 | $118,850 |
| Feb 11, 2026 | Lu Hongbo | Director | P Purchase | 25,985 | $22.50 | $584,663 |
| Feb 5, 2026 | Fox Jennifer A. | See Remarks | A Award | 1,592 | $13.35 | $21,253 |
| Feb 5, 2026 | Farmer Joseph L | See Remarks | A Award | 974 | $13.35 | $13,003 |
| Feb 2, 2026 | MOULDER LEON O JR | See Remarks | P Purchase | 57,000 | $17.96 | $1,023,720 |
| Jan 9, 2026 | MOULDER LEON O JR | See Remarks | P Purchase | 20,000 | $16.55 | $331,000 |
| Jan 8, 2026 | MOULDER LEON O JR | See Remarks | P Purchase | 30,000 | $16.30 | $489,000 |
| Jan 7, 2026 | MOULDER LEON O JR | See Remarks | P Purchase | 50,000 | $16.38 | $819,000 |
| Oct 9, 2025 | ENRIGHT PATRICK G | Director | P Purchase | 105,265 | $19.00 | $2,000,035 |
| Oct 9, 2025 | SR ONE CAPITAL MANAGEMENT, LLC | 10% Owner | P Purchase | 63,157 | $19.00 | $1,199,983 |
| Oct 9, 2025 | Nunn Jason Raleigh | Director | P Purchase | 63,158 | $19.00 | $1,200,002 |
| Oct 9, 2025 | ENRIGHT PATRICK G | Director | P Purchase | 11,990 | $20.85 | $249,992 |
| Oct 9, 2025 | SR ONE CAPITAL MANAGEMENT, LLC | 10% Owner | P Purchase | 63,158 | $19.00 | $1,200,002 |
| Oct 7, 2025 | Lu Hongbo | Director | P Purchase | 263,160 | $19.00 | $5,000,040 |
| Oct 7, 2025 | MOULDER LEON O JR | See Remarks | P Purchase | 36,928 | $20.85 | $769,949 |
| Oct 7, 2025 | Fairmount Funds Management LLC | Director | P Purchase | 316,219 | $19.00 | $6,008,161 |
| Jun 10, 2025 | ORLOFF JOHN J | Director | A Award | 18,500 | Not measured | Not measured |
| Jun 10, 2025 | Boylan James P | Director | A Award | 18,500 | Not measured | Not measured |
| Jun 10, 2025 | Lu Hongbo | Director | A Award | 18,500 | Not measured | Not measured |
| Jun 10, 2025 | Nunn Jason Raleigh | Director | A Award | 18,500 | Not measured | Not measured |
| Jun 10, 2025 | Fox Jennifer A. | See Remarks | A Award | 150,000 | Not measured | Not measured |
| Jun 10, 2025 | Oliveira Orlando | Chief Commercial Officer | A Award | 100,000 | Not measured | Not measured |
| Jun 10, 2025 | MOULDER LEON O JR | See Remarks | A Award | 400,000 | Not measured | Not measured |
| Jun 10, 2025 | Allen Patricia L | Director | A Award | 18,500 | Not measured | Not measured |
| Jun 10, 2025 | Farmer Joseph L | See Remarks | A Award | 175,000 | Not measured | Not measured |
| Jun 10, 2025 | Fairmount Funds Management LLC | Director | A Award | 18,500 | Not measured | Not measured |
| Jun 10, 2025 | ENRIGHT PATRICK G | Director | A Award | 18,500 | Not measured | Not measured |
| Apr 15, 2025 | von Moltke Lisa | See Remarks | A Award | 400,000 | Not measured | Not measured |
| Feb 18, 2025 | MOULDER LEON O JR | See Remarks | P Purchase | 25,000 | $6.67 | $166,750 |
| Feb 7, 2025 | Xiao Ting | Director | P Purchase | 10,000 | $7.76 | $77,600 |
| Dec 16, 2024 | Fox Jennifer A. | See Remarks | A Award | 8,125 | Not measured | Not measured |
The full Form 4 history is on the ZBIO company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.