On this page
Mika Nishimura
Insider
First SEC filing: June 8, 2026 · Latest: June 8, 2026
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net: $-56,703
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 |
|---|---|---|---|---|---|---|---|---|---|
| June 4, 2026 | SIBN | A | 10,957 | · | · | 43,673 Direct | +33.49% | Acquired | (price as of 2026-10-02) |
| March 12, 2026 | SIBN | S | 4,100 | $13.83 | $56,703 | 32,716 Direct | -11.14% | Disposed | 30.7% (price as of 2026-10-02) |
| Nov. 28, 2025 | ARAY | A | 56,603 | · | · | 56,603 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 21, 2025 | ARAY | M | 56,603 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Nov. 21, 2025 | ARAY | M | 56,603 | · | · | 212,659 Direct | +36.27% | Acquired | (price as of 2026-10-02) |
| June 5, 2025 | SIBN | A | 8,675 | · | · | 36,816 Direct | +30.83% | Acquired | (price as of 2026-10-02) |
| Nov. 29, 2024 | ARAY | A | 56,603 | · | · | 56,603 Direct | · | Acquired | (price as of 2026-10-02) |
| June 26, 2024 | SIBN | A | 8,791 | · | · | 28,141 Direct | +45.43% | Acquired | (price as of 2026-10-02) |
| March 13, 2024 | SIBN | S | 2,500 | $16.22 | $40,550 | 19,350 Direct | -11.44% | Disposed | 11.5% (price as of 2026-10-02) |
| Nov. 30, 2023 | ARAY | A | 56,603 | · | · | 156,056 Direct | +56.91% | Acquired | (price as of 2026-10-02) |
| June 9, 2023 | SIBN | A | 4,866 | · | · | 21,850 Direct | +28.65% | Acquired | (price as of 2026-10-02) |
| Nov. 30, 2022 | ARAY | A | 59,055 | · | · | 99,453 Direct | +146.18% | Acquired | (price as of 2026-10-02) |
| June 16, 2022 | SIBN | A | 8,324 | · | · | 16,984 Direct | +96.12% | Acquired | (price as of 2026-10-02) |
| Nov. 30, 2021 | ARAY | A | 31,185 | $4.81 | $150,000 | 40,398 Direct | +338.49% | Acquired | -94.2% (price as of 2026-10-02) |
| Aug. 31, 2021 | ARAY | A | 9,213 | $4.07 | $37,497 | 9,213 Direct | · | Acquired | -93.1% (price as of 2026-10-02) |
| March 4, 2021 | SIBN | A | 447 | · | · | 447 Direct | · | Acquired | (price as of 2026-10-02) |
| March 4, 2021 | SIBN | A | 8,213 | · | · | 8,660 Direct | +1837.36% | Acquired | (price as of 2026-10-02) |
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 |
|---|---|---|---|---|---|---|---|
| Nov. 28, 2025 | ARAY | Restricted Stock Units [F1] | Common Stock | $0.00 | · | 56,603 | Acquired |
| Nov. 21, 2025 | ARAY | Restricted Stock Units [F1] | Common Stock | $0.00 | · | 56,603 | Disposed |
| Nov. 29, 2024 | ARAY | Restricted Stock Units [F1] | Common Stock | $0.00 | · | 56,603 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).