Insider · CIK 0001900201
Catalyst4, Inc.
Files at MPLT (MapLight Therapeutics, Inc.). First filing Oct 29, 2025, latest Aug 18, 2026.
In brief
Catalyst4, Inc. files SEC Form 4 as 10% owner at MPLT (MapLight Therapeutics, Inc.). Since Oct 29, 2025, Catalyst4, Inc. has reported 3 open-market buys worth $158M and 0 open-market sells worth $0, the latest filed on Aug 18, 2026.
A track record needs three past buys with six months of prices behind them; Catalyst4, Inc. has 1, so none is measured yet.
The newest scored trade: bought $50M of MPLT on Aug 14, 2026, filed Aug 18, 2026, scored 51 (moderate). In the last 12 months: 3 buys worth $158M 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.
MPLT: MapLight Therapeutics, 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.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 51Moderate | MPLTbuy MapLight Therapeutics, Inc. | $50M 4,400,000 shares | +21% | +19% from low-70% from high | |
| 51Moderate | MapLight Therapeutics, Inc. | $15M 1,209,225 shares | +6% | +24% from low-69% from high | |
| 56Moderate | MapLight Therapeutics, Inc. | $92M 5,441,176 shares | +38% | 0% from low-9% from high |
Transactions
Every row this insider has filed, 14 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 14, 2026 | MPLT MapLight Therapeutics, Inc. | POpen-market purchase Voting Common Stockindirect: See footnote | +4,400,000 | $11.38 | $50M | 25,306,689 | Aug 18, 2026 |
| Aug 14, 2026 | MPLT MapLight Therapeutics, Inc. | POpen-market purchase Warrants (right to buy)derivativeindirect: See footnote | +2,928,686 | $11.38 | $33M | 2,928,686 | Aug 18, 2026 |
| Jul 28, 2026 | MPLT MapLight Therapeutics, Inc. | POpen-market purchase Voting Common Stockindirect: See footnote | +141,088 | $10.74 | $1.5M | 19,838,552 | Jul 30, 2026 |
| Jul 28, 2026 | MPLT MapLight Therapeutics, Inc. | POpen-market purchase Voting Common Stockindirect: See footnote | +65,137 | $11.69 | $761k | 19,903,689 | Jul 30, 2026 |
| Jul 29, 2026 | MPLT MapLight Therapeutics, Inc. | POpen-market purchase Voting Common Stockindirect: See footnote | +3,000 | $12.63 | $38k | 19,906,689 | Jul 30, 2026 |
| Jul 30, 2026 | MPLT MapLight Therapeutics, Inc. | POpen-market purchase Voting Common Stockindirect: See footnote | +1,000,000 | $13.00 | $13M | 20,906,689 | Jul 30, 2026 |
| Oct 28, 2025 | MPLT MapLight Therapeutics, Inc. | CConversion Voting Common Stockindirect: See footnote | +14,256,288 | - | - | 14,256,288 | Oct 29, 2025 |
| Oct 28, 2025 | MPLT MapLight Therapeutics, Inc. | POpen-market purchase Voting Common Stockindirect: See footnote | +5,441,176 | $17.00 | $92M | 19,697,464 | Oct 29, 2025 |
| Oct 28, 2025 | MPLT MapLight Therapeutics, Inc. | CConversion Series A Preferred Stockderivativeindirect: See footnote | -148,809 | - | - | 0 | Oct 29, 2025 |
| Oct 28, 2025 | MPLT MapLight Therapeutics, Inc. | CConversion Series A-1 Preferred Stockderivativeindirect: See footnote | -444,846 | - | - | 0 | Oct 29, 2025 |
| Oct 28, 2025 | MPLT MapLight Therapeutics, Inc. | CConversion Series B Preferred Stockderivativeindirect: See footnote | -1,263,768 | - | - | 0 | Oct 29, 2025 |
| Oct 28, 2025 | MPLT MapLight Therapeutics, Inc. | CConversion Series B-1 Preferred Stockderivativeindirect: See footnote | -275,148 | - | - | 0 | Oct 29, 2025 |
| Oct 28, 2025 | MPLT MapLight Therapeutics, Inc. | CConversion Series C Preferred Stockderivativeindirect: See footnote | -5,444,807 | - | - | 0 | Oct 29, 2025 |
| Oct 28, 2025 | MPLT MapLight Therapeutics, Inc. | CConversion Series D Preferred Stockderivativeindirect: See footnote | -6,678,910 | - | - | 0 | Oct 29, 2025 |
Questions about Catalyst4, Inc.
Answered from the filings on this page, as of the latest one.
Is Catalyst4, Inc. buying or selling?
In the last 12 months Catalyst4, Inc. reported 3 open-market buys worth $158M and 0 open-market sells worth $0 on SEC Form 4; the latest was bought $50M of MPLT on Aug 14, 2026. Grants, option exercises and tax withholding are not counted.
How did Catalyst4, Inc.'s past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Catalyst4, Inc. has 1.
Where does Catalyst4, Inc. file Form 4?
Catalyst4, Inc. has filed Form 4 at MPLT (MapLight Therapeutics, 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.