Klein Matthew B.
Director · Officer · PTCT, CLPT
As of 2026-09-16, Klein Matthew B. has 37 Form 4 transactions on record across 2 companies — 22 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Pattern in the record: open-market sales filed in August in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.
Reconstructed holdings
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-04 | PTCT | Sale | 10,292 @ $68.57 | $706K | −2.6% of holding | 383,868 | Form 4 |
| 2026-05-21 | CLPT | Sale | 16,000 @ $11.59 | $185K | −25.4% of holding | 46,935 | Form 4 |
| 2026-05-14 | PTCT | Sale | 7,221 @ $73.08 | $528K | −1.8% of holding | 398,670 | Form 4 |
| 2026-05-14 | PTCT | Sale | 2,572 @ $72.46 | $186K | −0.6% of holding | 393,998 | Form 4 |
| 2026-05-14 | PTCT | Sale | 2,100 @ $73.08 | $153K | −0.5% of holding | 396,570 | Form 4 |
| 2026-05-14 | PTCT | Sale | 679 @ $73.06 | $50K | −0.2% of holding | 405,891 | Form 4 |
| 2026-04-21 | PTCT | Sale | 2,850 @ $70.91 | $202K | −0.7% of holding | 394,070 | Form 4 |
| 2026-03-12 | PTCT | Sale | 2,662 @ $64.08 | $171K | −0.7% of holding | 396,920 | Form 4 |
| 2026-02-18 | PTCT | Sale | 7,371 @ $69.36 | $511K | −1.9% of holding | 387,082 | Form 4 |
| 2026-01-08 | PTCT | Sale | 2,514 @ $76.45 | $192K | −0.6% of holding | 394,453 | Form 4 |
| 2026-01-07 | PTCT | Sale | 3,016 @ $77.48 | $234K | −0.8% of holding | 396,967 | Form 4 |
| 2026-01-06 | PTCT | Sale | 5,149 @ $76.95 | $396K | −1.3% of holding | 399,983 | Form 4 |
| 2025-12-30 | PTCT | Sale | 8,089 @ $76.64 | $620K | −2.3% of holding | 341,875 | Form 4 |
| 2025-12-02 | PTCT | Sale | 3,428 @ $79.07 | $271K | −1.0% of holding | 349,964 | Form 4 |
| 2025-08-05 | PTCT | Sale | 10,739 @ $51.74 | $556K | −3.1% of holding | 337,767 | Form 4 |
| 2025-04-22 | PTCT | Sale | 2,804 @ $48.74 | $137K | −1.0% of holding | 273,234 | Form 4 |
| 2025-02-20 | PTCT | Sale | 3,895 @ $50.12 | $195K | −1.4% of holding | 276,038 | Form 4 |
| 2025-02-19 | PTCT | Sale | 3,897 @ $50.10 | $195K | −1.4% of holding | 279,933 | Form 4 |
| 2025-01-08 | PTCT | Sale | 2,402 @ $44.50 | $107K | −0.8% of holding | 283,830 | Form 4 |
| 2025-01-07 | PTCT | Sale | 2,142 @ $45.34 | $97K | −0.7% of holding | 286,232 | Form 4 |
| 2024-12-31 | PTCT | Sale | 8,279 @ $45.16 | $374K | −3.7% of holding | 217,528 | Form 4 |
16 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-05-21 | CLPT | Award / grant | 12,820 | 12,820 | Form 4 |
| 2026-05-19 | CLPT | Option exercise | 12,417 | 62,935 | Form 4 |
| 2026-05-19 | CLPT | Option exercise | 12,417 | 0 | Form 4 |
| 2026-05-13 | PTCT | Award / grant | 12,500 | 406,570 | Form 4 |
| 2026-03-11 | PTCT | Award / grant | 12,500 | 399,582 | Form 4 |
| 2026-01-02 | PTCT | Award / grant | 63,000 | 405,132 | Form 4 |
| 2026-01-02 | PTCT | Award / grant | 157,500 | 157,500 | Form 4 |
| 2025-12-01 | PTCT | Award / grant | 15,625 | 353,392 | Form 4 |
| 2025-08-01 | PTCT | Award / grant | 75,000 | 348,506 | Form 4 |
| 2025-05-22 | CLPT | Award / grant | 12,417 | 12,417 | Form 4 |
| 2025-05-16 | CLPT | Option exercise | 21,093 | 50,518 | Form 4 |
| 2025-05-16 | CLPT | Option exercise | 21,093 | 0 | Form 4 |
| 2025-05-16 | CLPT | Option exercise | 21,093 | 50,518 | Form 4 |
| 2025-05-16 | CLPT | Option exercise | 21,093 | 0 | Form 4 |
| 2025-01-03 | PTCT | Award / grant | 70,000 | 288,374 | Form 4 |
| 2025-01-03 | PTCT | Award / grant | 175,000 | 175,000 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.