On this page
Andrew Astor
Insider
First SEC filing: Aug. 18, 2021 · Latest: Aug. 18, 2021
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| March 5, 2022 | NEPH | M | 14,815 | $2.70 | $40,000 | 92,773 Direct | +19.00% | Acquired | 36.3% (price as of 2026-10-05) |
| March 5, 2022 | NEPH | M | 14,815 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 14, 2021 | NEPH | A | 38,612 | · | · | 38,612 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 18, 2021 | NEPH | P | 2,500 | $7.77 | $19,425 | 77,958 Direct | +3.31% | Acquired | -52.6% (price as of 2026-10-05) |
| Aug. 17, 2021 | NEPH | P | 2,500 | $7.67 | $19,175 | 75,458 Direct | +3.43% | Acquired | -52.0% (price as of 2026-10-05) |
| Nov. 19, 2020 | NEPH | P | 1,000 | $5.87 | $5,870 | 72,958 Direct | +1.39% | Acquired | -37.3% (price as of 2026-10-05) |
| Aug. 24, 2020 | NEPH | A | 152,064 | · | · | 152,064 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 19, 2020 | NEPH | P | 950 | $7.40 | $7,030 | 71,958 Direct | +1.34% | Acquired | -50.3% (price as of 2026-10-05) |
| May 28, 2020 | NEPH | P | 1,000 | $6.96 | $6,960 | 71,008 Direct | +1.43% | Acquired | -47.1% (price as of 2026-10-05) |
| March 12, 2020 | NEPH | P | 1,000 | $6.70 | $6,700 | 70,008 Direct | +1.45% | Acquired | -45.1% (price as of 2026-10-05) |
| March 5, 2020 | NEPH | P | 700 | $8.46 | $5,922 | 69,008 Direct | +1.02% | Acquired | -56.5% (price as of 2026-10-05) |
| Feb. 1, 2020 | NEPH | A | 13,958 | · | · | 46,525 Direct | +42.86% | Acquired | (price as of 2026-10-05) |
| Feb. 1, 2020 | NEPH | A | 19,320 | · | · | 64,399 Direct | +42.86% | Acquired | (price as of 2026-10-05) |
| Dec. 16, 2019 | NEPH | A | 20,000 | · | · | 20,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 16, 2019 | NEPH | A | 6,848 | · | · | 68,308 Direct | +11.14% | Acquired | (price as of 2026-10-05) |
| Nov. 18, 2019 | NEPH | P | 750 | $8.38 | $6,285 | 61,460 Direct | +1.24% | Acquired | -56.1% (price as of 2026-10-05) |
| Aug. 22, 2019 | NEPH | P | 1,500 | $6.97 | $10,455 | 60,710 Direct | +2.53% | Acquired | -47.2% (price as of 2026-10-05) |
| Aug. 9, 2019 | NEPH | A | 9,305 | · | · | 32,567 Direct | +40.00% | Acquired | (price as of 2026-10-05) |
| Aug. 9, 2019 | NEPH | A | 12,880 | · | · | 45,079 Direct | +40.00% | Acquired | (price as of 2026-10-05) |
| June 14, 2019 | NEPH | P | 35,000 | $0.64 | $22,400 | 532,903 Direct | +7.03% | Acquired | -36.1% (price as of 2026-10-05) |
| Dec. 19, 2018 | NEPH | A | 200,000 | · | · | 200,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 14, 2018 | NEPH | A | 44,111 | · | · | 497,903 Direct | +9.72% | Acquired | (price as of 2026-10-05) |
| May 14, 2018 | NEPH | X | 33,333 | · | · | 133,333 Direct | -20.00% | Disposed | (price as of 2026-10-05) |
| May 14, 2018 | NEPH | X | 33,333 | $0.30 | $10,000 | 453,792 Direct | +7.93% | Acquired | 36.3% (price as of 2026-10-05) |
| April 10, 2018 | NEPH | P | 80,000 | $0.45 | $36,000 | 420,459 Direct | +23.50% | Acquired | -9.1% (price as of 2026-10-05) |
| March 9, 2018 | NEPH | P | 5,000 | $0.48 | $2,400 | 340,459 Direct | +1.49% | Acquired | -14.8% (price as of 2026-10-05) |
| Dec. 20, 2017 | NEPH | A | 50,000 | · | · | 50,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 20, 2017 | NEPH | A | 120,417 | · | · | 335,459 Direct | +56.00% | Acquired | (price as of 2026-10-05) |
| Dec. 4, 2017 | NEPH | P | 8,333 | $0.50 | $4,166 | 215,042 Direct | +4.03% | Acquired | -18.2% (price as of 2026-10-05) |
| Dec. 1, 2017 | NEPH | P | 10,000 | $0.50 | $5,000 | 206,709 Direct | +5.08% | Acquired | -18.2% (price as of 2026-10-05) |
| Aug. 28, 2017 | NEPH | P | 4,000 | $0.27 | $1,080 | 196,709 Direct | +2.08% | Acquired | 51.4% (price as of 2026-10-05) |
| Aug. 28, 2017 | NEPH | P | 6,000 | $0.27 | $1,620 | 192,709 Direct | +3.21% | Acquired | 51.4% (price as of 2026-10-05) |
| Aug. 11, 2017 | NEPH | P | 20,000 | $0.26 | $5,200 | 186,666 Direct | +12.00% | Acquired | 57.3% (price as of 2026-10-05) |
| June 16, 2017 | NEPH | L | 43 | $0.26 | $11 | 186,709 Direct | +0.02% | Acquired | 57.3% (price as of 2026-10-05) |
| May 1, 2017 | NEPH | A | 209,355 | · | · | 209,355 Direct | · | Acquired | (price as of 2026-10-05) |
| May 1, 2017 | NEPH | A | 209,355 | · | · | 209,355 Direct | · | Acquired | (price as of 2026-10-05) |
| March 17, 2017 | NEPH | P | 166,666 | · | · | 166,666 Direct | · | Acquired | (price as of 2026-10-05) |
| March 17, 2017 | NEPH | P | 166,666 | · | · | 166,666 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 13, 2017 | NEPH | A | 289,785 | · | · | 289,785 Direct | · | Acquired | (price as of 2026-10-05) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| March 5, 2022 | NEPH | Warrants (right to buy) | Common Stock | $2.70 | March 17, 2022 | 14,815 | Disposed |
| Dec. 14, 2021 | NEPH | Stock Option (right to buy) | Common Stock | $6.82 | Dec. 14, 2031 | 38,612 | Acquired |
| Aug. 24, 2020 | NEPH | Stock Option (right to buy) | Common Stock | $7.07 | Aug. 24, 2030 | 152,064 | Acquired |
| Feb. 1, 2020 | NEPH | Stock Option (right to buy) | Common Stock | $2.64 | May 1, 2027 | 13,958 | Acquired |
| Feb. 1, 2020 | NEPH | Stock Option (right to buy) | Common Stock | $4.14 | Feb. 13, 2027 | 19,320 | Acquired |
| Dec. 16, 2019 | NEPH | Stock Option (right to buy) | Common Stock | $8.30 | Dec. 16, 2029 | 20,000 | Acquired |
| Aug. 9, 2019 | NEPH | Stock Option (right to buy) | Common Stock | $2.64 | May 1, 2027 | 9,305 | Acquired |
| Aug. 9, 2019 | NEPH | Stock Option (right to buy) | Common Stock | $4.14 | Feb. 13, 2027 | 12,880 | Acquired |
| Dec. 19, 2018 | NEPH | Stock Option (right to buy) | Common Stock | $0.65 | Dec. 19, 2028 | 200,000 | Acquired |
| May 14, 2018 | NEPH | Warrants (right to buy) | Common Stock | $0.30 | March 17, 2022 | 33,333 | Disposed |
| Dec. 20, 2017 | NEPH | Stock Option (right to buy) | Common Stock | $0.50 | Dec. 20, 2027 | 50,000 | Acquired |
| May 1, 2017 | NEPH | Stock Option (right to buy) | Common Stock | $0.29 | May 1, 2027 | 209,355 | Acquired |
| May 1, 2017 | NEPH | Stock Option (right to buy) | Common Stock | $0.29 | May 1, 2017 | 209,355 | Acquired |
| March 17, 2017 | NEPH | Warrants (right to buy) | Common Stock | $0.30 | March 17, 2022 | 166,666 | Acquired |
| Feb. 13, 2017 | NEPH | Stock Option (right to buy) | Common Stock | $0.46 | Feb. 13, 2027 | 289,785 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).