David Kupfer
CIK 1642053 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 3, 2015 · Latest: June 5, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 10 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
10 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Dec. 1, 2021 | NERV | S | 55,635 | $0.88 | $48,959 | 163,553 Direct | -25.38% | Disposed | -29.8% (price as of 2026-08-19) |
| June 26, 2019 | NERV | P | 10,000 | $5.55 | $55,500 | 219,188 Direct | +4.78% | Acquired | -88.9% (price as of 2026-08-19) |
| June 21, 2016 | NERV | P | 27,935 | $10.72 | $299,463 | 27,935 Indirect | — | Acquired | -94.2% (price as of 2026-08-19) |
| June 20, 2016 | NERV | P | 27,700 | $10.95 | $303,315 | 209,188 Direct | +15.26% | Acquired | -94.4% (price as of 2026-08-19) |
| March 17, 2016 | NERV | P | 181,488 | $5.51 | $999,999 | 181,488 Direct | — | Acquired | -88.8% (price as of 2026-08-19) |
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 |
|---|---|---|---|---|---|---|---|
| Sept. 27, 2023 | NERV | Stock Option (right to buy) [F1] | Common Stock (12,500) | $7.30 | Sept. 26, 2033 | 12,500 | Acquired |
| June 10, 2022 | NERV | Stock Option (right to buy) [F1] | Common Stock | — | June 9, 2032 | 2,500 | Acquired |
| June 11, 2021 | NERV | Stock Option (right to buy) [F1] | Common Stock (20,000) | $2.90 | June 10, 2031 | 20,000 | Acquired |
| June 11, 2020 | NERV | Stock Option (right to buy) [F1] | Common Stock (20,000) | $3.40 | June 10, 2030 | 20,000 | Acquired |
| May 31, 2019 | NERV | Stock Option (right to buy) | Common Stock (20,000) | $5.21 | May 30, 2029 | 20,000 | Acquired |
| June 7, 2018 | NERV | Stock Option (Right to Buy) | Common Stock (20,000) | $8.25 | June 6, 2028 | 20,000 | Acquired |
| June 1, 2017 | NERV | Stock Option (Right to Buy) | Common Stock (12,500) | $10.00 | May 31, 2027 | 12,500 | Acquired |
| June 16, 2016 | NERV | Stock Option (right to buy) | Common Stock (12,500) | $10.20 | June 15, 2026 | 12,500 | Acquired |
| Nov. 2, 2015 | NERV | Stock Option (right to buy) | Common Stock (25,000) | — | Nov. 1, 2025 | 25,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.