Insider · CIK 0001400717
Mark Simon
Files at CABA (Cabaletta Bio, Inc.). First filing Jan 21, 2026, latest Jan 21, 2026.
In brief
Mark Simon files SEC Form 4 as director at CABA (Cabaletta Bio, Inc.). Since Jan 21, 2026, Mark Simon has reported 1 open-market buy worth $25k and 0 open-market sells worth $0, the latest filed on Jan 21, 2026.
A track record needs three past buys with six months of prices behind them; Mark Simon has 0, so none is measured yet.
The newest scored trade: bought $25k of CABA on Jan 21, 2026, filed Jan 21, 2026, scored 38 (weak). In the last 12 months: 1 buy worth $25k and 0 sells worth $0.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
CABA: Cabaletta Bio, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
Transactions
Every row this insider has filed, 11 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Jun 9, 2026 | CABA Cabaletta Bio, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +22,000 | $0.00 | $0 | 22,000 | Jun 10, 2026 |
| Jan 21, 2026 | CABA Cabaletta Bio, Inc. | POpen-market purchase Common Stock | +11,061 | $2.28 | $25k | 147,205 | Jan 21, 2026 |
| Jun 9, 2025 | CABA Cabaletta Bio, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +22,000 | $0.00 | $0 | 22,000 | Jun 9, 2025 |
| May 19, 2025 | CABA Cabaletta Bio, Inc. | DDisposition to issuer Stock Option (Right to Buy)derivative | -18,460 | $0.00 | $0 | 0 | May 19, 2025 |
| May 19, 2025 | CABA Cabaletta Bio, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +18,460 | $0.00 | $0 | 18,460 | May 19, 2025 |
| May 19, 2025 | CABA Cabaletta Bio, Inc. | DDisposition to issuer Stock Option (Right to Buy)derivative | -22,000 | $0.00 | $0 | 0 | May 19, 2025 |
| May 19, 2025 | CABA Cabaletta Bio, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +22,000 | $0.00 | $0 | 22,000 | May 19, 2025 |
| May 19, 2025 | CABA Cabaletta Bio, Inc. | DDisposition to issuer Stock Option (Right to Buy)derivative | -22,000 | $0.00 | $0 | 0 | May 19, 2025 |
| May 19, 2025 | CABA Cabaletta Bio, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +22,000 | $0.00 | $0 | 22,000 | May 19, 2025 |
| May 19, 2025 | CABA Cabaletta Bio, Inc. | DDisposition to issuer Stock Option (Right to Buy)derivative | -22,000 | $0.00 | $0 | 0 | May 19, 2025 |
| May 19, 2025 | CABA Cabaletta Bio, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +22,000 | $0.00 | $0 | 22,000 | May 19, 2025 |
Questions about Mark Simon
Answered from the filings on this page, as of the latest one.
Is Mark Simon buying or selling?
In the last 12 months Mark Simon reported 1 open-market buy worth $25k and 0 open-market sells worth $0 on SEC Form 4; the latest was bought $25k of CABA on Jan 21, 2026. Grants, option exercises and tax withholding are not counted.
How did Mark Simon's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Mark Simon has 0.
Where does Mark Simon file Form 4?
Mark Simon has filed Form 4 at CABA (Cabaletta Bio, Inc.). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.