Michael J Zelefsky
CIK 1266801 · View on SEC EDGAR ↗
Insider
First SEC filing: April 29, 2020 · Latest: April 29, 2020
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 4 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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| July 5, 2023 | MBIO | A | 7,246 | — | — | 18,970 Direct | +61.80% | Acquired | (price as of 2026-08-21) |
| July 29, 2022 | MBIO | A | 71,664 | — | — | 175,861 Direct | +68.78% | Acquired | (price as of 2026-08-21) |
| June 28, 2021 | MBIO | A | 13,774 | — | — | 104,197 Direct | +15.23% | Acquired | (price as of 2026-08-21) |
| July 14, 2020 | MBIO | A | 16,611 | — | — | 90,423 Direct | +22.50% | Acquired | (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.
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| April 29, 2020 | MBIO | Common Stock | 73,812 | Direct |