Matthew B. Klein is CEO at PTC THERAPEUTICS, INC. (PTCT). They have made 28 open-market trades across 2 companies since 2021, most recently 2026-08-04.
CIK 0001808968
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 28 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| PTCT | 383,868 | $22.8M |
| CLPT | 46,935 | $426K |
| Total | $23.2M |
Shares reported on the most recent Form 4, priced at the 2026-08-06 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| PTCT | SELL | 2026-08-04 | 2026-08-06 | $68.57 | $706K | +1.3% | -4.1% | — |
| CLPT | SELL | 2026-05-21 | 2026-05-26 | $11.59 | $185K | +12.4% | +57.0% | +32.3% |
| PTCT | SELL | 2026-05-14 | 2026-05-15 | $72.95 | $917K | -0.9% | +7.2% | +0.5% |
| PTCT | SELL | 2026-04-21 | 2026-04-23 | $70.91 | $202K | -5.1% | -1.3% | +14.4% |
| PTCT | SELL | 2026-03-12 | 2026-03-13 | $64.08 | $171K | +3.0% | +8.7% | +15.3% |
| PTCT | SELL | 2026-02-18 | 2026-02-20 | $69.36 | $511K | -8.1% | -5.1% | -0.3% |
| PTCT | SELL | 2026-01-08 | 2026-01-12 | $76.45 | $192K | -1.9% | -7.6% | -8.2% |
| PTCT | SELL | 2026-01-06 | 2026-01-08 | $77.15 | $630K | -2.9% | -4.7% | -8.4% |
| PTCT | SELL | 2025-12-30 | 2026-01-02 | $76.64 | $620K | +1.7% | -1.5% | -10.8% |
| PTCT | SELL | 2025-12-02 | 2025-12-03 | $79.07 | $542K | +1.9% | +2.6% | -14.0% |
| PTCT | SELL | 2025-08-05 | 2025-08-05 | $51.74 | $1.1M | -4.8% | +13.1% | +32.4% |
| PTCT | SELL | 2025-04-22 | 2025-04-24 | $48.74 | $273K | -26.3% | -2.5% | -4.1% |
| PTCT | SELL | 2025-02-19 | 2025-02-21 | $50.11 | $781K | +2.9% | +13.0% | -9.8% |
| PTCT | SELL | 2025-01-07 | 2025-01-10 | $45.04 | $301K | +6.2% | +14.5% | -7.4% |
| PTCT | SELL | 2024-12-31 | 2025-01-03 | $45.16 | $748K | -6.5% | +8.5% | +1.4% |
| PTCT | SELL | 2024-04-19 | 2024-04-22 | $24.89 | $167K | +28.5% | +47.7% | +26.3% |
| PTCT | SELL | 2024-04-17 | 2024-04-19 | $25.14 | $33K | +34.8% | +58.3% | +29.5% |
| PTCT | SELL | 2024-01-08 | 2024-01-10 | $28.90 | $444K | -1.7% | -10.3% | -3.0% |
| PTCT | SELL | 2024-01-05 | 2024-01-09 | $27.15 | $549K | -4.3% | -11.4% | -5.7% |
| PTCT | SELL | 2023-04-18 | 2023-04-20 | $52.04 | $126K | +2.3% | +10.0% | -25.5% |
| PTCT | SELL | 2023-01-10 | 2023-01-12 | $43.64 | $394K | -2.7% | -3.7% | +0.8% |
| PTCT | SELL | 2023-01-09 | 2023-01-11 | $41.66 | $30K | +4.4% | +0.4% | +7.1% |
| PTCT | SELL | 2022-04-19 | 2022-04-21 | $42.52 | $38K | -12.2% | -20.9% | +9.0% |
| PTCT | SELL | 2022-01-07 | 2022-01-11 | $38.53 | $30K | +0.3% | +9.8% | +6.8% |
| PTCT | SELL | 2021-04-19 | 2021-04-21 | $46.99 | $185K | -10.5% | -13.4% | -4.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.