Klaus Schafer
CIK 1705904 · View on SEC EDGAR ↗
Insider
First SEC filing: Dec. 11, 2020 · Latest: Dec. 11, 2020
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 22 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
22 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Dec. 10, 2020 | ALT | P | 2,000 | $11.99 | $23,980 | 8,900 Direct | +28.99% | Acquired | -74.8% (price as of 2026-08-20) |
| Nov. 12, 2020 | ALT | S 10b5-1 | 10,150 | $9.91 | $100,586 | 6,900 Direct | -59.53% | Disposed | -69.5% (price as of 2026-08-20) |
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. 25, 2025 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 (48,800) | $3.92 | Sept. 25, 2035 | 48,800 | Acquired |
| Sept. 26, 2024 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 (34,900) | $6.81 | Sept. 26, 2034 | 34,900 | Acquired |
| Sept. 28, 2023 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 (26,100) | $2.50 | Sept. 28, 2033 | 26,100 | Acquired |
| Sept. 29, 2022 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 (23,500) | $12.62 | Sept. 29, 2032 | 23,500 | Acquired |
| June 20, 2022 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 | — | July 4, 2022 | 60 | Disposed |
| June 20, 2022 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 | — | July 4, 2022 | 159 | Disposed |
| June 20, 2022 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 | — | Dec. 30, 2022 | 60 | Disposed |
| Sept. 23, 2021 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 (24,100) | $15.44 | Sept. 23, 2031 | 24,100 | Acquired |
| Sept. 24, 2020 | ALT | Restricted Stock Units ("RSUs") | Common Stock (16,850) | — | — | 16,850 | Disposed |
| Sept. 24, 2020 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 (25,500) | $12.03 | Sept. 24, 2030 | 25,500 | Acquired |
| June 25, 2020 | ALT | Restricted Stock Units ("RSUs") | Common Stock (16,850) | — | — | 16,850 | Acquired |
| Jan. 2, 2019 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 (20,000) | $2.60 | Jan. 2, 2029 | 20,000 | Acquired |
| Oct. 13, 2017 | ALT | Stock Options (option to buy) | Common Stock, par value $0.0001 (20,000) | $2.50 | Oct. 13, 2027 | 20,000 | Acquired |
| May 4, 2017 | ALT | Stock Option (option to buy) | Common Stock, par value $0.0001 (1,791) | $0.59 | Dec. 31, 2023 | 1,791 | Acquired |
| May 4, 2017 | ALT | Stock Option (option to buy) | Common Stock, par value $0.0001 (1,791) | $0.08 | Dec. 31, 2022 | 1,791 | Acquired |
| May 4, 2017 | ALT | Stock Option (option to buy) | Common Stock, par value $0.0001 (1,791) | $0.08 | July 4, 2022 | 1,791 | Acquired |
| May 4, 2017 | ALT | Stock Option (option to buy) | Common Stock, par value $0.0001 (4,775) | $0.08 | July 4, 2022 | 4,775 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).