ADC Therapeutics S.A. (ADCT) has 20 known insider and institutional holders on record. The largest holder is Redmile Group, LLC with 12,957,305 shares. Other notable holders include WILD HANS PETER and MALLIK AMEET.
Over the last 12 months, insiders have made 33 transactions in ADCT stock — 10 buys (valued at RSU Award) and 3 sells (valued at $9.62M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
ADCT Insider Ownership
Top Holder
Redmile Group, LLC
12,957,305 shares
Buys (12 mo)
10
$0.00 value
Sells (12 mo)
3
$9.62M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Redmile Group, Llc |
10 Percent Owner |
12,957,305 |
2026-04-02 |
|
| 2 |
Wild Hans Peter |
10 Percent Owner |
9,788,944 |
2025-05-19 |
|
| 3 |
Mallik Ameet |
Chief Executive Officer |
1,446,769 |
2026-02-18 |
|
| 4 |
Carmona Jose |
Chief Financial Officer |
734,376 |
2026-02-18 |
|
| 5 |
Zaki Mohamed |
Chief Medical Officer |
682,417 |
2026-02-18 |
|
| 6 |
Graham Peter J |
Chief Legal Officer |
620,540 |
2026-02-18 |
|
| 7 |
Hug Peter |
Director |
220,500 |
2025-06-17 |
|
| 8 |
Pfisterer Thomas |
Other: See Explanations |
173,899 |
2025-05-19 |
|
| 9 |
Monges Viviane |
Director |
144,043 |
2025-06-17 |
|
| 10 |
Kallebo Lisa Michelle |
Chief Accounting Officer |
128,224 |
2026-02-18 |
|
| 11 |
Sandor Victor |
Director |
108,286 |
2025-06-17 |
|
| 12 |
Bizzari Jean-pierre |
Director |
106,902 |
2025-06-17 |
|
| 13 |
Squarer Ron |
Director |
93,627 |
2025-06-17 |
|
| 14 |
Azelby Robert |
Director |
80,405 |
2025-06-17 |
|
| 15 |
Coughlin Timothy |
Director |
40,000 |
2025-06-05 |
|
| 16 |
Quiram Jeffrey A |
VP; President, Wireless Bu |
17,500 |
2004-03-04 |
|
| 17 |
Switz Robert E |
Chairman, Pres & CEO |
16,666 |
2009-11-24 |
|
| 18 |
Johnson B Kristine |
Director |
10,869 |
2005-03-03 |
|
| 19 |
Foret Mickey P |
Director |
10,687 |
2010-02-12 |
|
| 20 |
Martin Lois M |
Director |
10,687 |
2010-02-12 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-04-02 |
Redmile Group, Llc |
10 Percent Owner |
Informative Sell |
2,529,491 |
$3.28 |
$8.29M |
| 2026-04-01 |
Redmile Group, Llc |
10 Percent Owner |
Informative Sell |
162,517 |
$3.80 |
$617.4K |
| 2026-03-31 |
Redmile Group, Llc |
10 Percent Owner |
Informative Sell |
188,407 |
$3.75 |
$706.9K |
| 2026-02-13 |
Kallebo Lisa Michelle |
Chief Accounting Officer |
Tax Withholding of RSU |
5,433 |
$3.99 |
$21.68K |
| 2026-02-13 |
Zaki Mohamed |
Chief Medical Officer |
Tax Withholding of RSU |
24,603 |
$3.99 |
$98.17K |
| 2026-02-13 |
Mallik Ameet |
Chief Executive Officer |
Tax Withholding of RSU |
103,231 |
$3.99 |
$411.89K |
| 2026-02-13 |
Carmona Jose |
Chief Financial Officer |
Tax Withholding of RSU |
25,880 |
$3.99 |
$103.26K |
| 2026-02-13 |
Graham Peter J |
Chief Legal Officer |
Tax Withholding of RSU |
33,294 |
$3.99 |
$132.84K |
| 2025-12-06 |
Kallebo Lisa Michelle |
Chief Accounting Officer |
Tax Withholding of RSU |
7,140 |
$3.29 |
$23.49K |
| 2025-12-06 |
Zaki Mohamed |
Chief Medical Officer |
Tax Withholding of RSU |
41,068 |
$3.29 |
$135.11K |
| 2025-12-06 |
Mallik Ameet |
Chief Executive Officer |
Tax Withholding of RSU |
233,146 |
$3.29 |
$767.05K |
| 2025-12-06 |
Carmona Jose |
Chief Financial Officer |
Tax Withholding of RSU |
53,236 |
$3.29 |
$175.15K |
| 2025-12-06 |
Graham Peter J |
Chief Legal Officer |
Tax Withholding of RSU |
49,508 |
$3.29 |
$162.88K |
| 2025-10-27 |
Redmile Group, Llc |
10 Percent Owner |
Informative Buy |
3,846,153 |
- |
- |
| 2025-06-13 |
Hug Peter |
Director |
Tax Withholding of RSU |
2,144 |
$3.58 |
$7.68K |
| 2025-06-13 |
Monges Viviane |
Director |
Tax Withholding of RSU |
2,584 |
$3.58 |
$9.25K |
| 2025-06-13 |
Azelby Robert |
Director |
Tax Withholding of RSU |
12,600 |
$3.58 |
$45.11K |
| 2025-06-13 |
Bizzari Jean-pierre |
Director |
Tax Withholding of RSU |
12,600 |
$3.58 |
$45.11K |
| 2025-06-13 |
Sandor Victor |
Director |
Tax Withholding of RSU |
12,600 |
$3.58 |
$45.11K |
| 2025-06-13 |
Squarer Ron |
Director |
Tax Withholding of RSU |
15,184 |
$3.58 |
$54.36K |
| 2025-06-11 |
Redmile Group, Llc |
10 Percent Owner |
Informative Buy |
12,465,234 |
- |
- |
| 2025-06-03 |
Hug Peter |
Director |
RSU Award |
40,000 |
- |
- |
| 2025-06-03 |
Monges Viviane |
Director |
RSU Award |
40,000 |
- |
- |
| 2025-06-03 |
Azelby Robert |
Director |
RSU Award |
40,000 |
- |
- |
| 2025-06-03 |
Bizzari Jean-pierre |
Director |
RSU Award |
40,000 |
- |
- |
