PTC Therapeutics, Inc. (PTCT) has 20 known insider and institutional holders on record. The largest holder is Klein Matthew B. with 399,582 shares. Other notable holders include Boulding Mark Elliott and Gravier Pierre.
Over the last 12 months, insiders have made 54 transactions in PTCT stock — 10 buys (valued at $14.22M) and 36 sells (valued at $5.5M). Insider selling has exceeded buying during this period.
PTCT Insider Ownership
Top Holder
Klein Matthew B.
399,582 shares
Buys (12 mo)
10
$14.22M value
Sells (12 mo)
36
$5.5M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Klein Matthew B. |
Chief Executive Officer |
399,582 |
2026-03-13 |
|
| 2 |
Boulding Mark Elliott |
Exec. VP and CLO |
105,212 |
2026-02-23 |
|
| 3 |
Gravier Pierre |
Chief Financial Officer |
87,318 |
2026-02-20 |
|
| 4 |
Golden Lee Scott |
EVP & Chief Medical Officer |
79,115 |
2026-04-06 |
|
| 5 |
Pauwels Eric |
Chief Business Officer |
77,122 |
2026-02-20 |
|
| 6 |
Utter Christine Marie |
SVP, Chief Accounting Officer |
70,199 |
2026-02-20 |
|
| 7 |
Almstead Neil Gregory |
Chief Technical Ops Officer |
60,137 |
2026-04-03 |
|
| 8 |
Peltz Stuart Walter |
Chief Executive Officer |
54,903 |
2023-02-02 |
|
| 9 |
Hill Emily Luisa |
Chief Financial Officer |
38,925 |
2023-03-29 |
|
| 10 |
Svoronos Dawn |
Director |
29,017 |
2022-06-10 |
|
| 11 |
Jacobson Allan Steven |
Director |
19,118 |
2025-03-06 |
|
| 12 |
Schmertzler Michael |
Director |
17,600 |
2025-01-07 |
|
| 13 |
Bell William F. Jr. |
Director |
10,000 |
2024-02-16 |
|
| 14 |
Southwell David P |
Director |
8,800 |
2025-01-07 |
|
| 15 |
Young Alethia |
Director |
8,800 |
2025-01-07 |
|
| 16 |
Steele Glenn Jr Md Phd |
Director |
8,800 |
2025-01-07 |
|
| 17 |
Okey Stephanie |
Director |
8,000 |
2026-03-09 |
|
| 18 |
Zeldis Jerome B |
Director |
3,475 |
2026-01-06 |
|
| 19 |
Reeve Emma |
Director |
3,475 |
2026-01-06 |
|
| 20 |
Smith Mary L. |
Director |
3,475 |
2026-01-06 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-04-02 |
Golden Lee Scott |
EVP & Chief Medical Officer |
Informative Sell |
829 |
$67.99 |
$56.36K |
| 2026-04-01 |
Almstead Neil Gregory |
Chief Technical Ops Officer |
Informative Sell |
80 |
$70.30 |
$5.62K |
| 2026-03-24 |
Chutter Jessica Caroline |
Director |
RSU Award |
2,896 |
$64.54 |
$186.91K |
| 2026-03-24 |
Chutter Jessica Caroline |
Officer |
Unknown |
- |
- |
- |
| 2026-03-12 |
Klein Matthew B. |
Chief Executive Officer |
Informative Sell |
2,662 |
$64.08 |
$170.58K |
| 2026-03-11 |
Klein Matthew B. |
Chief Executive Officer |
RSU Award |
12,500 |
- |
- |
| 2026-03-10 |
Okey Stephanie |
Director |
Option Exercise (Sell) |
14,000 |
$33.63 |
$470.82K |
| 2026-03-05 |
Okey Stephanie |
Director |
Informative Sell |
6,333 |
$63.38 |
$401.39K |
| 2026-03-05 |
Golden Lee Scott |
EVP & Chief Medical Officer |
Informative Sell |
10,000 |
$63.38 |
$633.8K |
| 2026-03-05 |
Almstead Neil Gregory |
Chief Technical Ops Officer |
Informative Sell |
3,989 |
$63.38 |
$252.82K |
| 2026-02-19 |
Boulding Mark Elliott |
Exec. VP and CLO |
Informative Sell |
590 |
$69.82 |
$41.19K |
| 2026-02-18 |
Gravier Pierre |
Chief Financial Officer |
Informative Sell |
2,992 |
$69.36 |
$207.53K |
| 2026-02-18 |
Klein Matthew B. |
Chief Executive Officer |
Informative Sell |
7,371 |
$69.36 |
$511.25K |
| 2026-02-18 |
Utter Christine Marie |
SVP, Chief Accounting Officer |
Informative Sell |
2,494 |
$69.36 |
$172.98K |
| 2026-02-18 |
Golden Lee Scott |
EVP & Chief Medical Officer |
Informative Sell |
2,484 |
$69.36 |
$172.29K |
| 2026-02-18 |
Almstead Neil Gregory |
Chief Technical Ops Officer |
Informative Sell |
65 |
$69.36 |
$4.51K |
| 2026-02-18 |
Pauwels Eric |
Chief Business Officer |
Informative Sell |
3,019 |
$69.36 |
$209.4K |
| 2026-02-18 |
Boulding Mark Elliott |
Exec. VP and CLO |
Informative Sell |
3,081 |
$69.36 |
$213.7K |
| 2026-02-17 |
Boulding Mark Elliott |
Exec. VP and CLO |
Option Exercise (Sell) |
2,813 |
$25.69 |
$72.27K |
| 2026-01-08 |
Klein Matthew B. |
Chief Executive Officer |
Informative Sell |
2,514 |
$76.45 |
$192.2K |
| 2026-01-08 |
Utter Christine Marie |
SVP, Chief Accounting Officer |
Informative Sell |
1,034 |
$76.45 |
$79.05K |
| 2026-01-08 |
Golden Lee Scott |
EVP & Chief Medical Officer |
Informative Sell |
866 |
$76.45 |
$66.21K |
| 2026-01-09 |
Boulding Mark Elliott |
Exec. VP and CLO |
Informative Sell |
107 |
$79.52 |
$8.51K |
| 2026-01-08 |
Boulding Mark Elliott |
Exec. VP and CLO |
Informative Sell |
1,286 |
$76.45 |
$98.31K |
| 2026-01-08 |
Almstead Neil Gregory |
Chief Technical Ops Officer |
Informative Sell |
59 |
$76.45 |
$4.51K |
