Boulding Mark Elliott
Officer · PTCT
As of 2026-09-16, Boulding Mark Elliott has 159 Form 4 transactions on record across 1 company — 103 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
- Direct $1.1M
- Indirect $0
| PTCT | direct | 16,876 sh | $1.1M |
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 |
|---|---|---|---|---|---|---|---|
| 2026-08-17 | PTCT | Sale | 1,844 @ $72.39 | $133K | −1.7% of holding | 106,241 | Form 4 |
| 2026-08-17 | PTCT | Sale | 969 @ $72.90 | $71K | −0.9% of holding | 105,272 | Form 4 |
| 2026-07-06 | PTCT | Sale | 1,036 @ $84.41 | $87K | −1.0% of holding | 106,662 | Form 4 |
| 2026-07-06 | PTCT | Sale | 833 @ $84.41 | $70K | −0.8% of holding | 106,392 | Form 4 |
| 2026-07-06 | PTCT | Sale | 745 @ $86.38 | $64K | −0.7% of holding | 105,272 | Form 4 |
| 2026-07-06 | PTCT | Sale | 645 @ $85.84 | $55K | −0.6% of holding | 106,017 | Form 4 |
| 2026-07-06 | PTCT | Sale | 601 @ $86.38 | $52K | −0.6% of holding | 105,272 | Form 4 |
| 2026-07-06 | PTCT | Sale | 519 @ $85.84 | $45K | −0.5% of holding | 105,873 | Form 4 |
| 2026-07-06 | PTCT | Sale | 387 @ $83.10 | $32K | −0.4% of holding | 107,698 | Form 4 |
| 2026-07-06 | PTCT | Sale | 313 @ $83.10 | $26K | −0.3% of holding | 107,225 | Form 4 |
| 2026-06-17 | PTCT | Sale | 6,600 @ $78.50 | $518K | −5.8% of holding | 107,122 | Form 4 |
| 2026-06-17 | PTCT | Sale | 1,850 @ $79.24 | $147K | −1.7% of holding | 105,272 | Form 4 |
| 2026-06-17 | PTCT | Sale | 1,703 @ $78.50 | $134K | −1.6% of holding | 105,581 | Form 4 |
| 2026-06-17 | PTCT | Sale | 309 @ $79.25 | $24K | −0.3% of holding | 105,272 | Form 4 |
| 2026-05-15 | PTCT | Sale | 2,356 @ $72.08 | $170K | −2.2% of holding | 105,668 | Form 4 |
| 2026-05-15 | PTCT | Sale | 456 @ $72.67 | $33K | −0.4% of holding | 105,212 | Form 4 |
| 2026-05-08 | PTCT | Sale | 1,900 @ $79.31 | $151K | −1.8% of holding | 105,212 | Form 4 |
| 2026-05-08 | PTCT | Sale | 840 @ $78.23 | $66K | −0.8% of holding | 107,112 | Form 4 |
| 2026-05-08 | PTCT | Sale | 600 @ $79.28 | $48K | −0.6% of holding | 105,212 | Form 4 |
| 2026-05-08 | PTCT | Sale | 200 @ $78.00 | $16K | −0.2% of holding | 105,812 | Form 4 |
| 2026-04-06 | PTCT | Sale | 1,443 @ $69.75 | $101K | −1.4% of holding | 105,212 | Form 4 |
| 2026-04-06 | PTCT | Sale | 822 @ $68.91 | $57K | −0.8% of holding | 106,655 | Form 4 |
| 2026-02-19 | PTCT | Sale | 1,629 @ $69.82 | $114K | −1.5% of holding | 106,014 | Form 4 |
| 2026-02-19 | PTCT | Sale | 590 @ $69.82 | $41K | −0.6% of holding | 105,212 | Form 4 |
| 2026-02-19 | PTCT | Sale | 588 @ $68.54 | $40K | −0.5% of holding | 107,643 | Form 4 |
| 2026-02-19 | PTCT | Sale | 212 @ $68.54 | $15K | −0.2% of holding | 105,802 | Form 4 |
| 2026-02-18 | PTCT | Sale | 3,081 @ $69.36 | $214K | −2.8% of holding | 108,231 | Form 4 |
| 2026-02-17 | PTCT | Sale | 2,811 @ $69.29 | $195K | −2.5% of holding | 111,314 | Form 4 |
| 2026-02-17 | PTCT | Sale | 2 @ $70.13 | $140 | −0.0% of holding | 111,312 | Form 4 |
| 2026-01-09 | PTCT | Sale | 1,521 @ $77.46 | $118K | −1.3% of holding | 112,105 | Form 4 |
| 2026-01-09 | PTCT | Sale | 686 @ $78.71 | $54K | −0.6% of holding | 111,419 | Form 4 |
| 2026-01-09 | PTCT | Sale | 107 @ $79.52 | $9K | −0.1% of holding | 111,312 | Form 4 |
| 2026-01-08 | PTCT | Sale | 2,482 @ $76.56 | $190K | −2.1% of holding | 115,177 | Form 4 |
| 2026-01-08 | PTCT | Sale | 1,286 @ $76.45 | $98K | −1.1% of holding | 113,626 | Form 4 |
| 2026-01-08 | PTCT | Sale | 265 @ $77.07 | $20K | −0.2% of holding | 114,912 | Form 4 |
| 2026-01-07 | PTCT | Sale | 1,638 @ $77.11 | $126K | −1.4% of holding | 118,646 | Form 4 |
| 2026-01-07 | PTCT | Sale | 1,503 @ $77.48 | $116K | −1.3% of holding | 117,659 | Form 4 |
| 2026-01-07 | PTCT | Sale | 949 @ $77.91 | $74K | −0.8% of holding | 117,697 | Form 4 |
| 2026-01-07 | PTCT | Sale | 471 @ $77.10 | $36K | −0.4% of holding | 117,939 | Form 4 |
| 2026-01-07 | PTCT | Sale | 269 @ $77.92 | $21K | −0.2% of holding | 117,670 | Form 4 |
| 2026-01-07 | PTCT | Sale | 38 @ $78.60 | $3K | −0.0% of holding | 117,659 | Form 4 |
| 2026-01-07 | PTCT | Sale | 11 @ $78.98 | $869 | −0.0% of holding | 117,659 | Form 4 |
| 2026-01-06 | PTCT | Sale | 1,739 @ $76.95 | $134K | −1.4% of holding | 119,162 | Form 4 |
| 2026-01-05 | PTCT | Sale | 1,123 @ $74.92 | $84K | −0.9% of holding | 122,044 | Form 4 |
| 2026-01-05 | PTCT | Sale | 1,035 @ $76.10 | $79K | −0.8% of holding | 121,009 | Form 4 |
| 2026-01-05 | PTCT | Sale | 108 @ $76.79 | $8K | −0.1% of holding | 120,901 | Form 4 |
| 2025-11-17 | PTCT | Sale | 1,843 @ $75.64 | $139K | −1.7% of holding | 104,870 | Form 4 |
| 2025-11-17 | PTCT | Sale | 777 @ $76.53 | $59K | −0.7% of holding | 104,093 | Form 4 |
| 2025-11-17 | PTCT | Sale | 192 @ $77.18 | $15K | −0.2% of holding | 103,901 | Form 4 |
| 2025-10-07 | PTCT | Sale | 1,757 @ $62.89 | $110K | −1.6% of holding | 105,519 | Form 4 |
| 2025-10-07 | PTCT | Sale | 1,306 @ $63.80 | $83K | −1.2% of holding | 104,213 | Form 4 |
| 2025-10-07 | PTCT | Sale | 312 @ $64.97 | $20K | −0.3% of holding | 103,901 | Form 4 |
| 2025-10-06 | PTCT | Sale | 2,266 @ $65.07 | $147K | −2.1% of holding | 103,901 | Form 4 |
| 2025-10-03 | PTCT | Sale | 7,400 @ $66.44 | $492K | −6.6% of holding | 105,401 | Form 4 |
| 2025-10-03 | PTCT | Sale | 6,124 @ $65.47 | $401K | −5.1% of holding | 112,801 | Form 4 |
| 2025-10-03 | PTCT | Sale | 3,100 @ $64.43 | $200K | −2.5% of holding | 118,925 | Form 4 |
| 2025-10-03 | PTCT | Sale | 1,500 @ $67.15 | $101K | −1.4% of holding | 103,901 | Form 4 |
| 2025-10-03 | PTCT | Sale | 906 @ $66.63 | $60K | −0.9% of holding | 103,901 | Form 4 |
| 2025-10-03 | PTCT | Sale | 877 @ $66.67 | $58K | −0.8% of holding | 103,901 | Form 4 |
| 2025-10-03 | PTCT | Sale | 838 @ $65.72 | $55K | −0.8% of holding | 104,778 | Form 4 |
| 2025-10-03 | PTCT | Sale | 824 @ $65.73 | $54K | −0.8% of holding | 104,807 | Form 4 |
| 2025-10-03 | PTCT | Sale | 550 @ $64.44 | $35K | −0.5% of holding | 105,616 | Form 4 |
| 2025-10-03 | PTCT | Sale | 536 @ $64.43 | $35K | −0.5% of holding | 105,631 | Form 4 |
| 2025-09-12 | PTCT | Sale | 22,117 @ $61.33 | $1.4M | −17.5% of holding | 104,445 | Form 4 |
| 2025-09-12 | PTCT | Sale | 1,019 @ $61.31 | $62K | −1.0% of holding | 103,901 | Form 4 |
| 2025-09-12 | PTCT | Sale | 905 @ $61.21 | $55K | −0.9% of holding | 103,901 | Form 4 |
| 2025-09-12 | PTCT | Sale | 544 @ $62.09 | $34K | −0.5% of holding | 103,901 | Form 4 |
| 2025-09-11 | PTCT | Sale | 17,838 @ $61.00 | $1.1M | −14.7% of holding | 103,901 | Form 4 |
| 2025-09-11 | PTCT | Sale | 2,470 @ $61.00 | $151K | −2.3% of holding | 103,901 | Form 4 |
| 2025-09-11 | PTCT | Sale | 2,356 @ $61.00 | $144K | −2.2% of holding | 103,901 | Form 4 |
| 2025-08-15 | PTCT | Sale | 2,813 @ $48.58 | $137K | −2.6% of holding | 103,901 | Form 4 |
| 2025-05-16 | PTCT | Sale | 883 @ $46.02 | $41K | −0.8% of holding | 103,901 | Form 4 |
| 2025-05-15 | PTCT | Sale | 1,929 @ $46.18 | $89K | −1.8% of holding | 103,901 | Form 4 |
| 2025-03-12 | PTCT | Sale | 13,126 @ $53.31 | $700K | −11.2% of holding | 103,901 | Form 4 |
| 2025-03-12 | PTCT | Sale | 2,395 @ $53.23 | $127K | −2.3% of holding | 103,901 | Form 4 |
| 2025-03-11 | PTCT | Sale | 5,662 @ $53.02 | $300K | −5.2% of holding | 103,901 | Form 4 |
| 2025-03-11 | PTCT | Sale | 1,719 @ $53.01 | $91K | −1.6% of holding | 103,901 | Form 4 |
| 2025-03-10 | PTCT | Sale | 45,392 @ $53.15 | $2.4M | −30.4% of holding | 103,901 | Form 4 |
| 2025-03-10 | PTCT | Sale | 11,398 @ $53.12 | $605K | −9.9% of holding | 103,901 | Form 4 |
| 2025-03-10 | PTCT | Sale | 7,762 @ $53.05 | $412K | −7.0% of holding | 103,901 | Form 4 |
74 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-08-17 | PTCT | Option exercise | 2,813 | 108,085 | Form 4 |
| 2026-08-17 | PTCT | Option exercise | 2,813 | 16,876 | Form 4 |
| 2026-07-06 | PTCT | Option exercise | 2,813 | 108,085 | Form 4 |
| 2026-07-06 | PTCT | Option exercise | 2,266 | 107,538 | Form 4 |
| 2026-07-06 | PTCT | Option exercise | 2,226 | 4,532 | Form 4 |
| 2026-07-06 | PTCT | Option exercise | 2,813 | 28,125 | Form 4 |
| 2026-06-17 | PTCT | Option exercise | 8,510 | 113,722 | Form 4 |
| 2026-06-17 | PTCT | Option exercise | 2,012 | 107,284 | Form 4 |
| 2026-06-17 | PTCT | Option exercise | 8,510 | 32,950 | Form 4 |
| 2026-06-17 | PTCT | Option exercise | 2,012 | 30,938 | Form 4 |
| 2026-05-15 | PTCT | Option exercise | 2,812 | 108,024 | Form 4 |
| 2026-05-15 | PTCT | Option exercise | 2,812 | 19,689 | Form 4 |
| 2026-05-08 | PTCT | Option exercise | 2,740 | 107,952 | Form 4 |
| 2026-05-08 | PTCT | Option exercise | 800 | 106,012 | Form 4 |
| 2026-05-08 | PTCT | Option exercise | 2,740 | 42,260 | Form 4 |
| 2026-05-08 | PTCT | Option exercise | 800 | 41,460 | Form 4 |
| 2026-04-06 | PTCT | Option exercise | 2,265 | 107,477 | Form 4 |
| 2026-04-06 | PTCT | Option exercise | 2,265 | 6,798 | Form 4 |
| 2026-02-17 | PTCT | Option exercise | 2,813 | 114,125 | Form 4 |
| 2026-02-17 | PTCT | Option exercise | 2,813 | 22,501 | Form 4 |
| 2026-01-07 | PTCT | Option exercise | 2,625 | 120,284 | Form 4 |
| 2026-01-07 | PTCT | Option exercise | 751 | 118,410 | Form 4 |
| 2026-01-07 | PTCT | Option exercise | 2,625 | 751 | Form 4 |
| 2026-01-07 | PTCT | Option exercise | 751 | 0 | Form 4 |
| 2026-01-05 | PTCT | Option exercise | 2,266 | 123,167 | Form 4 |
| 2026-01-05 | PTCT | Option exercise | 2,266 | 9,063 | Form 4 |
| 2026-01-02 | PTCT | Award / grant | 42,500 | 42,500 | Form 4 |
| 2026-01-02 | PTCT | Award / grant | 17,000 | 120,901 | Form 4 |
| 2025-11-17 | PTCT | Option exercise | 2,812 | 106,713 | Form 4 |
| 2025-11-17 | PTCT | Option exercise | 2,812 | 25,314 | Form 4 |
| 2025-10-07 | PTCT | Option exercise | 3,375 | 107,276 | Form 4 |
| 2025-10-07 | PTCT | Option exercise | 3,375 | 3,376 | Form 4 |
| 2025-10-06 | PTCT | Option exercise | 2,266 | 106,167 | Form 4 |
| 2025-10-06 | PTCT | Option exercise | 2,266 | 11,329 | Form 4 |
| 2025-10-03 | PTCT | Option exercise | 18,124 | 122,025 | Form 4 |
| 2025-10-03 | PTCT | Option exercise | 2,266 | 106,167 | Form 4 |
| 2025-10-03 | PTCT | Option exercise | 2,265 | 106,166 | Form 4 |
| 2025-10-03 | PTCT | Option exercise | 18,124 | 18,126 | Form 4 |
| 2025-10-03 | PTCT | Option exercise | 2,266 | 15,860 | Form 4 |
| 2025-10-03 | PTCT | Option exercise | 2,265 | 13,595 | 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.