NEPH · Insider Trading
Nephros Inc.
Every open-market purchase and sale reported by NEPH officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-16 | WEXFORD CAPITAL LP | 10%+ Owner | J | −3,377,821 | −$89.70K |
| 2026-09-16 | Arthur H Amron | Director | J | +43,295 | +$89.70K |
| 2026-08-20 | WEXFORD CAPITAL LP | 10%+ Owner | M | +812 | +$2.92K |
| 2026-08-14 | Arthur H Amron | Director | A | +2,418 | — |
| 2026-06-12 | Arthur H Amron | Director | A | +3,574 | — |
| 2026-03-25 | Robert R. Banks Jr. | President and CEO | M | +120,000 | +$172.80K |
| 2026-03-25 | Judy Krandel | Chief Financial Officer | M | +68,861 | +$117.75K |
| 2026-03-18 | Arthur H Amron | Director | A | +3,610 | — |
| 2026-03-18 | Judy Krandel | Chief Financial Officer | A | +4,000 deriv. | — |
| 2025-11-13 | Lisa Marie Nettis | Director | A | +1,622 | — |
| 2025-11-13 | Oliver J. Spandow | Director | A | +8,036 | — |
| 2025-11-13 | Arthur H Amron | Director | A | +5,391 | — |
| 2025-08-13 | Lisa Marie Nettis | Director | A | +13,229 deriv. | — |
| 2025-03-31 | Judy Krandel | Chief Financial Officer | A | +54,359 deriv. | — |
| 2025-01-03 | Joseph Michael Harris | Director | A | — | — |
| 2025-01-03 | Arthur H Amron | Director | A | +22,418 | — |
| 2025-01-03 | Alisa Lask | Director | A | — | — |
| 2025-01-03 | Oliver J. Spandow | Director | A | +33,241 | — |
| 2024-05-30 | Arthur H Amron | Director | Buy | +5,000 | +$11.18K |
| 2024-05-16 | Arthur H Amron | Director | A | — | — |
| 2024-05-16 | Robert R. Banks Jr. | President and CEO | Buy | +50,000 | +$112.05K |
| 2024-05-16 | Alisa Lask | Director | A | — | — |
| 2024-05-16 | Oliver J. Spandow | Director | A | — | — |
| 2024-05-16 | Joseph Michael Harris | Director | A | — | — |
| 2024-03-14 | Arthur H Amron | Director | MIXED | +98,463 | +$17.13K |
| 2024-03-14 | Charles E Davidson | 10%+ Owner | J | −91,463 | — |
| 2023-12-15 | Arthur H Amron | Director | A | +9,291 | — |
| 2023-12-15 | Joseph Michael Harris | Director | A | +9,291 | — |
| 2023-12-15 | Alisa Lask | Director | A | +9,291 | — |
| 2023-12-15 | Oliver J. Spandow | Director | A | +14,294 | — |
| 2023-12-11 | Robert R. Banks Jr. | President and CEO | Buy | +18,000 | +$39.65K |
| 2023-11-03 | Judy Krandel | Chief Financial Officer | A | +122,524 deriv. | — |
| 2023-08-15 | Robert R. Banks Jr. | President and CEO | Buy | +2,000 | +$3.36K |
| 2023-01-09 | Tom Gwydir | Director | A | +27,613 | — |
| 2023-01-09 | Joseph Michael Harris | Director | A | +8,402 | — |
| 2023-01-09 | Alisa Lask | Director | A | +27,613 | — |
| 2023-01-09 | Oliver J. Spandow | Director | A | +42,481 | — |
| 2023-01-09 | Arthur H Amron | Director | A | +27,613 | — |
| 2022-09-08 | Joseph Michael Harris | Director | A | +13,115 deriv. | — |
| 2022-03-07 | Andrew Astor | President, CEO & CFO | M | +14,815 | +$40.00K |
| 2022-02-18 | Wesley S. Lobo | Chief Marketing Officer | F | −6,389 | −$30.67K |
| 2021-12-16 | Oliver J. Spandow | Director | A | +5,429 | — |
| 2021-12-16 | Arthur H Amron | Director | A | +4,582 | — |
| 2021-12-16 | Tom Gwydir | Director | A | +4,582 | — |
| 2021-12-16 | Andrew Astor | President & CEO | A | — | — |
| 2021-12-16 | Alisa Lask | Director | A | +4,582 | — |
| 2021-09-03 | Wesley S. Lobo | Chief Commercial Officer | A | — | — |
| 2021-08-23 | Wesley S. Lobo | Chief Marketing Officer | Buy | +1,000 | +$7.92K |
| 2021-08-19 | Tom Gwydir | Director | Buy | +5,000 | +$38.20K |
| 2021-08-18 | Andrew Astor | President & CEO | Buy | +5,000 | +$38.60K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| WEXFORD CAPITAL LP | Director | 223,539 | $675.09K |
| Robert R. Banks Jr. | President and CEO | 190,000 | $573.80K |
| Arthur H Amron | Director | 161,459 | $487.61K |
| Oliver J. Spandow | Director | 122,881 | $371.10K |
| Judy Krandel | Chief Financial Officer | 68,861 | $207.96K |
| Alisa Lask | Director | 48,629 | $146.86K |
| Joseph Michael Harris | Director | 17,693 | $53.43K |
| Lisa Marie Nettis | Director | 1,622 | $4.90K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the NEPH quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.