Mark Elliott Boulding sold $171k of PTCT
EXEC. VP AND CLO at PTC THERAPEUTICS, INC.. 2,266 shares at an average of $75.55, traded Jan 5, 2026, filed Jan 6, 2026.
Score components
- +15RoleOfficer
- +11Trade size$171k at market
- 0Share of holdings soldSold 1.8% of holdings
- +15Cluster9 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m -5.7%, 3m -9.3%, 6m +16.3%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001578852-26-000002, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Jan 2, 2026 | AGrant or award Common Stock10b5-1 | +17,000 | $0.00 | $0 | 120,901 | Jan 6, 2026 |
| Jan 5, 2026 | MOption exercise Common Stock10b5-1 | +2,266 | $39.42 | $89k | 123,167 | Jan 6, 2026 |
| Jan 5, 2026 | SOpen-market sale Common Stock10b5-1 | -1,123 | $74.92 | $84k | 122,044 | Jan 6, 2026 |
| Jan 5, 2026 | SOpen-market sale Common Stock10b5-1 | -1,035 | $76.10 | $79k | 121,009 | Jan 6, 2026 |
| Jan 5, 2026 | SOpen-market sale Common Stock10b5-1 | -108 | $76.79 | $8,293 | 120,901 | Jan 6, 2026 |
| Jan 2, 2026 | AGrant or award Stock Option (Right to Buy)derivative10b5-1 | +42,500 | $0.00 | $0 | 42,500 | Jan 6, 2026 |
| Jan 5, 2026 | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -2,266 | $0.00 | $0 | 9,063 | Jan 6, 2026 |
Related signals
Other insiders at PTC THERAPEUTICS, INC. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| Pro nowfree Oct 20, 2026 | PTC THERAPEUTICS, INC. | Mark Elliott Boulding EXEC. VP AND CLO | $12k 192 shares | -0% | |
| Pro nowfree Oct 16, 2026 | PTC THERAPEUTICS, INC. | Michael Schmertzler director | $158k 2,500 shares | -0% | |
| 6Weak | PTC THERAPEUTICS, INC. | Mark Elliott Boulding EXEC. VP AND CLO | $133k 2,073 shares | -2% | |
| 27Weak | PTC THERAPEUTICS, INC. | Glenn Steele Jr Md Phd director | $782k 12,000 shares | -35% | |
| 28Weak | PTC THERAPEUTICS, INC. | Michael Schmertzler director | $1.3M 20,000 shares | -2% | |
| 20Weak | PTC THERAPEUTICS, INC. | Michael Schmertzler director | $1.4M 20,000 shares | -1% | |
| 28Weak | PTC THERAPEUTICS, INC. | Michael Schmertzler director | $1.8M 25,000 shares | -2% | |
| 28Weak | PTC THERAPEUTICS, INC. | Michael Schmertzler director | $1.8M 25,000 shares | -2% | |
| 7Weak | PTC THERAPEUTICS, INC. | Mark Elliott Boulding EXEC. VP AND CLO | $204k 2,813 shares | -3% | |
| 34Weak | PTC THERAPEUTICS, INC. | Matthew B. Klein CHIEF EXECUTIVE OFFICER | $706k 10,292 shares | -3% |
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.