Tiba Aynechi
CIK 1669220 · View on SEC EDGAR ↗
Insider
Activist
First SEC filing: Sept. 12, 2024 · Latest: June 5, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 9 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
9 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 16, 2024 | MBX | P | 750,000 | $16.00 | $12,000,000 | 2,136,335 Indirect | +54.10% | Acquired | 314.5% (price as of 2026-08-21) |
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 |
|---|---|---|---|---|---|---|---|
| June 4, 2026 | MBX | Stock option (right to buy) | Common Stock (12,500) | $30.91 | June 4, 2036 | 12,500 | Acquired |
| June 5, 2025 | MBX | Stock option (right to buy) | Common Stock (16,000) | $11.86 | June 5, 2035 | 16,000 | Acquired |
| Sept. 16, 2024 | MBX | Series B Convertible Preferred Stock | Common Stock (1,386,335) | — | — | 16,666,666 | Disposed |
| Sept. 12, 2024 | MBX | Stock Option (Right to Buy) | Common Stock (15,963) | $16.00 | Sept. 11, 2034 | 15,963 | Acquired |
| May 22, 2024 | SPRB | Stock Option (Right to Buy) | Common Stock (30,000) | $0.75 | May 21, 2034 | 30,000 | Acquired |
| May 25, 2023 | SPRB | Stock Option (Right to Buy) | Common Stock (30,000) | $2.26 | May 24, 2033 | 30,000 | Acquired |
| June 8, 2022 | NKTX | Stock Option (right to buy) | Common Stock (16,000) | $14.95 | June 7, 2032 | 16,000 | Acquired |
| May 25, 2022 | SPRB | Stock Option (Right to Buy) | Common Stock (22,500) | $1.32 | May 24, 2032 | 22,500 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Sept. 12, 2024 | MBX | Series B Convertible Preferred Stock→ Common Stock (1,386,335) | 1,386,335 | Indirect |