John K. A. Prendergast serves as Executive at AVIGEN INC \DE, where they oversee executive responsibilities. Since joining the company, John K. A. Prendergast has executed 36 insider transactions totaling $388.4K, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 9, 2025 involved receiving (via award) 1,300 shares valued at $0.
John K. A. Prendergast currently holds 13,802 shares of AVIGEN INC \DE (AVGN), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, John K. A. Prendergast has been a net seller of AVGN stock. They have purchased $78.0K and sold $310.4K worth of shares.
John K. A. Prendergast's most recent insider trade was on Dec 9, 2025, when they sold 1,300 shares at $0.00 per share.
Get notified when new Form 4 filings are submitted
| $N/A |
| Discretionary |
| Jul 15, 2024 | PTN | $0 | Award | 16,000 | $N/A | Discretionary |
| Jun 20, 2023 | PTN | $0 | Award | 13,000 | $N/A | Discretionary |
| Jun 22, 2022 | PTN | $0 | Award | 99,000 | $N/A | Discretionary |
| Jun 22, 2021 | PTN | $0 | Award | 105,000 | $N/A | Discretionary |
| May 14, 2021 | HTBX | $205.4K | Sale | 35,000 | $5.87 | Discretionary |
| Jan 4, 2021 | HTBX | $0 | Award | 138,272 | $N/A | Discretionary |
| Jun 16, 2020 | PTN | $0 | Award | 99,000 | $N/A | Discretionary |
| Jan 2, 2020 | HTBX | $0 | Award | 400,000 | $N/A | Discretionary |
| Jun 24, 2019 | PTN | $0 | Award | 84,000 | $N/A | Discretionary |
| Jan 1, 2019 | HTBX | $0 | Award | 300,000 | $N/A | Discretionary |
| Jun 26, 2018 | PTN | $0 | Award | 56,000 | $N/A | Discretionary |
| Dec 12, 2017 | PTN | $0 | Award | 60,000 | $N/A | Discretionary |
| Jun 20, 2017 | PTN | $0 | Award | 108,000 | $N/A | Discretionary |
| Jun 13, 2016 | PTN | $0 | Option Exercise | 40,000 | $N/A | Discretionary |
| Jun 9, 2016 | PTN | $0 | Award | 75,000 | $N/A | Discretionary |
| Dec 8, 2015 | PTN | $0 | Award | 100,000 | $N/A | Discretionary |
| Jun 25, 2015 | PTN | $0 | Option Exercise | 30,000 | $N/A | Discretionary |
| Dec 18, 2009 | AVGN | $0 | Disposition | 39,108 | $N/A | Discretionary |
| Aug 14, 2008 | AVGN | $1.2K | Sale | 337 | $3.47 | Discretionary |
| Aug 13, 2008 | AVGN | $2.4K | Sale | 700 | $3.38 | Discretionary |
| Aug 13, 2008 | AVGN | $4.4K | Sale | 1,300 | $3.40 | Discretionary |
| Aug 13, 2008 | AVGN | $342 | Sale | 100 | $3.42 | Discretionary |
| Aug 13, 2008 | AVGN | $14.6K | Sale | 4,263 | $3.43 | Discretionary |
| Aug 13, 2008 | AVGN | $341 | Sale | 100 | $3.41 | Discretionary |
| Aug 13, 2008 | AVGN | $2.4K | Sale | 700 | $3.39 | Discretionary |
| Apr 13, 2007 | AVXT.OB | $52.0K | Purchase | 400,000 | $0.13 | Discretionary |
| Apr 13, 2007 | AVXT.OB | $26.0K | Purchase | 200,000 | $0.13 | Discretionary |
| Mar 22, 2007 | AVGN | $17.5K | Sale | 2,692 | $6.50 | Discretionary |