EFOI Insider Transactions
312 retained open-market purchase and sale rows from SEC Forms 3, 4 and 5, newest first. This page shows rows 1–100; provenance stays internal.
EFOI insiders transaction timeline
PurchaseSale
| Insider profile | Role | Date | Transaction | Shares | Price |
|---|
| Huang Chiao Chieh | Chief Executive Officer | 2025-11-26 | Purchase | 262,009.0 | $2.29 |
|---|
| Huang Chiao Chieh | Chief Executive Officer | 2025-08-15 | Purchase | 264,550.0 | $1.89 |
|---|
| Huang Chiao Chieh | Chief Executive Officer | 2025-06-23 | Purchase | 110,497.0 | $1.81 |
|---|
| Huang Chiao Chieh | Chief Executive Officer | 2025-03-27 | Purchase | 103,627.0 | $1.93 |
|---|
| Politziner Philip | Director | 2021-08-25 | Purchase | 3,000.0 | $3.35 |
|---|
| Socolof Stephen | Director | 2021-08-18 | Purchase | 3,500.0 | $2.8 |
|---|
| Tu James | Chairman and CEO | 2021-08-16 | Purchase | 5,000.0 | $2.7 |
|---|
| NESTOR TOD A | President, CFO | 2020-04-15 | Purchase | 42,470.0 | $0.37 |
|---|
| NESTOR TOD A | President, CFO | 2020-04-14 | Purchase | 55,830.0 | $0.37 |
|---|
| NESTOR TOD A | President, CFO | 2020-04-13 | Purchase | 51,700.0 | $0.32 |
|---|
| Politziner Philip | Director | 2020-04-13 | Purchase | 32,000.0 | $0.31 |
|---|
| Tewksbury Ted L III | Chairman, CEO & President | 2017-05-19 | Purchase | 3,333.0 | $3.13 |
|---|
| Tewksbury Ted L III | Chairman, CEO & President | 2017-05-08 | Purchase | 3,333.0 | $3.14 |
|---|
| White Bradley Brian | CFO & Secretary | 2017-03-10 | Purchase | 1,075.0 | $3.12 |
|---|
| White Bradley Brian | CFO & Secretary | 2017-03-10 | Purchase | 975.0 | $3.12 |
|---|
| White Bradley Brian | CFO & Secretary | 2017-03-10 | Purchase | 1,600.0 | $3.13 |
|---|
| Cohen William | Director | 2016-03-14 | Purchase | 1,259.0 | $7.88 |
|---|
| Ramelot Michael Rush | Director | 2016-03-14 | Purchase | 3,000.0 | $8.05 |
|---|
| Luo Jiangang | Director | 2015-09-16 | Sale | 391,304.0 | $15.98 |
|---|
| Huang Gina | TenPercentOwner | 2015-09-16 | Sale | 434,783.0 | $15.98 |
|---|
| Bright Horizon Partners Inc. | TenPercentOwner | 2015-09-16 | Sale | 391,304.0 | $15.98 |
|---|
| Bright Horizon Partners Inc. | TenPercentOwner | 2015-04-01 | Sale | 100,000.0 | $4.0 |
|---|
| Huang Gina | TenPercentOwner | 2015-01-20 | Purchase | 200,000.0 | $4.5 |
|---|
| Huang Gina | TenPercentOwner | 2015-01-20 | Purchase | 200,000.0 | $4.5 |
|---|
| Gelbaum David | TenPercentOwner | 2012-01-06 | Sale | 2,400.0 | $0.19 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2012-01-06 | Sale | 2,400.0 | $0.19 |
|---|
| Quercus Trust | TenPercentOwner | 2012-01-06 | Sale | 2,400.0 | $0.19 |
|---|
| Gelbaum David | Other | 2011-06-27 | Sale | 3,965,000.0 | $0.4 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-06-27 | Sale | 3,965,000.0 | $0.4 |
|---|
| Quercus Trust | TenPercentOwner | 2011-06-27 | Sale | 3,965,000.0 | $0.4 |
|---|
| Gelbaum David | TenPercentOwner | 2011-06-17 | Sale | 3,500.0 | $0.42 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-06-17 | Sale | 3,500.0 | $0.42 |
|---|
| Quercus Trust | TenPercentOwner | 2011-06-17 | Sale | 3,500.0 | $0.42 |
|---|
| Gelbaum David | TenPercentOwner | 2011-06-16 | Sale | 7,800.0 | $0.42 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-06-16 | Sale | 7,800.0 | $0.42 |
|---|
| Quercus Trust | TenPercentOwner | 2011-06-16 | Sale | 7,800.0 | $0.42 |
|---|
| Gelbaum David | TenPercentOwner | 2011-06-15 | Sale | 20,000.0 | $0.34 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-06-15 | Sale | 20,000.0 | $0.34 |
|---|
| Quercus Trust | TenPercentOwner | 2011-06-15 | Sale | 20,000.0 | $0.34 |
|---|
| Gelbaum David | TenPercentOwner | 2011-06-14 | Sale | 2,500.0 | $0.51 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-06-14 | Sale | 2,500.0 | $0.51 |
|---|
| Quercus Trust | TenPercentOwner | 2011-06-14 | Sale | 2,500.0 | $0.51 |
|---|
| Gelbaum David | TenPercentOwner | 2011-05-06 | Sale | 8,000.0 | $0.7 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-05-06 | Sale | 8,000.0 | $0.7 |
|---|
| Quercus Trust | TenPercentOwner | 2011-05-06 | Sale | 8,000.0 | $0.7 |
|---|
| Gelbaum David | TenPercentOwner | 2011-05-05 | Sale | 8,500.0 | $0.7 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-05-05 | Sale | 8,500.0 | $0.7 |
|---|
| Quercus Trust | TenPercentOwner | 2011-05-05 | Sale | 8,500.0 | $0.7 |
|---|
| Gelbaum David | TenPercentOwner | 2011-05-04 | Sale | 16,000.0 | $0.74 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-05-04 | Sale | 16,000.0 | $0.74 |
|---|
| Quercus Trust | TenPercentOwner | 2011-05-04 | Sale | 16,000.0 | $0.74 |
|---|
| Gelbaum David | Director,TenPercentOwner | 2011-03-31 | Sale | 18,000.0 | $1.15 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-03-31 | Sale | 18,000.0 | $1.15 |
|---|
| Quercus Trust | TenPercentOwner | 2011-03-31 | Sale | 18,000.0 | $1.15 |
|---|
| Gelbaum David | Director,TenPercentOwner | 2011-03-30 | Sale | 24,500.0 | $1.13 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-03-30 | Sale | 24,500.0 | $1.13 |
|---|
| Quercus Trust | TenPercentOwner | 2011-03-30 | Sale | 24,500.0 | $1.13 |
|---|
| Gelbaum David | Director,TenPercentOwner | 2011-03-29 | Sale | 80,000.0 | $1.25 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-03-29 | Sale | 80,000.0 | $1.25 |
|---|
| Quercus Trust | TenPercentOwner | 2011-03-29 | Sale | 80,000.0 | $1.25 |
|---|
| Gelbaum David | TenPercentOwner | 2011-03-09 | Sale | 86,200.0 | $1.14 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-03-09 | Sale | 86,200.0 | $1.14 |
|---|
| Quercus Trust | TenPercentOwner | 2011-03-09 | Sale | 86,200.0 | $1.14 |
|---|
| Gelbaum David | Director,TenPercentOwner | 2011-02-24 | Sale | 6,500.0 | $1.0 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-02-24 | Sale | 6,500.0 | $1.0 |
|---|
| Quercus Trust | TenPercentOwner | 2011-02-24 | Sale | 6,500.0 | $1.0 |
|---|
| Gelbaum David | TenPercentOwner | 2011-02-23 | Sale | 23,300.0 | $1.0 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-02-23 | Sale | 23,300.0 | $1.0 |
|---|
| Quercus Trust | TenPercentOwner | 2011-02-23 | Sale | 23,300.0 | $1.0 |
|---|
| Gelbaum David | TenPercentOwner | 2011-02-22 | Sale | 6,500.0 | $1.01 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-02-22 | Sale | 6,500.0 | $1.01 |
|---|
| Quercus Trust | TenPercentOwner | 2011-02-22 | Sale | 6,500.0 | $1.01 |
|---|
| Gelbaum David | TenPercentOwner | 2011-01-31 | Sale | 42,000.0 | $1.01 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-01-31 | Sale | 42,000.0 | $1.01 |
|---|
| Quercus Trust | TenPercentOwner | 2011-01-31 | Sale | 42,000.0 | $1.01 |
|---|
| Gelbaum David | TenPercentOwner | 2011-01-18 | Sale | 41,300.0 | $1.06 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-01-18 | Sale | 41,300.0 | $1.06 |
|---|
| Quercus Trust | TenPercentOwner | 2011-01-18 | Sale | 41,300.0 | $1.06 |
|---|
| Gelbaum David | TenPercentOwner | 2011-01-14 | Sale | 68,500.0 | $1.05 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-01-14 | Sale | 68,500.0 | $1.05 |
|---|
| Quercus Trust | TenPercentOwner | 2011-01-14 | Sale | 68,500.0 | $1.05 |
|---|
| Gelbaum David | TenPercentOwner | 2011-01-13 | Sale | 15,000.0 | $1.01 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-01-13 | Sale | 15,000.0 | $1.01 |
|---|
| Quercus Trust | TenPercentOwner | 2011-01-13 | Sale | 15,000.0 | $1.01 |
|---|
| Gelbaum David | TenPercentOwner | 2011-01-05 | Sale | 2,000.0 | $1.06 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-01-05 | Sale | 2,000.0 | $1.06 |
|---|
| Quercus Trust | TenPercentOwner | 2011-01-05 | Sale | 2,000.0 | $1.06 |
|---|
| Gelbaum David | TenPercentOwner | 2011-01-04 | Sale | 12,500.0 | $1.0 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2011-01-04 | Sale | 12,500.0 | $1.0 |
|---|
| Quercus Trust | TenPercentOwner | 2011-01-04 | Sale | 12,500.0 | $1.0 |
|---|
| Gelbaum David | TenPercentOwner | 2010-12-21 | Sale | 9,000.0 | $1.0 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2010-12-21 | Sale | 9,000.0 | $1.0 |
|---|
| Quercus Trust | TenPercentOwner | 2010-12-21 | Sale | 9,000.0 | $1.0 |
|---|
| Gelbaum David | TenPercentOwner | 2010-12-16 | Sale | 5,500.0 | $1.0 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2010-12-16 | Sale | 5,500.0 | $1.0 |
|---|
| Quercus Trust | TenPercentOwner | 2010-12-16 | Sale | 5,500.0 | $1.0 |
|---|
| Gelbaum David | TenPercentOwner | 2010-12-15 | Sale | 12,200.0 | $1.0 |
|---|
| Gelbaum Monica Chavez | TenPercentOwner | 2010-12-15 | Sale | 12,200.0 | $1.0 |
|---|
| Quercus Trust | TenPercentOwner | 2010-12-15 | Sale | 12,200.0 | $1.0 |
|---|
| Gelbaum David | TenPercentOwner | 2010-12-14 | Sale | 5,000.0 | $1.01 |
|---|