Aclaris Therapeutics, Inc. (ACRS) has 20 known insider and institutional holders on record. The largest holder is Leonard Braden Michael with 14,043,975 shares. Other notable holders include RA CAPITAL MANAGEMENT, LLC and Foresite Capital Management III, LLC.
Over the last 12 months, insiders have made 38 transactions in ACRS stock — 16 buys (valued at RSU Award) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
ACRS Insider Ownership
Top Holder
Leonard Braden Michael
14,043,975 shares
Buys (12 mo)
16
$0.00 value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Leonard Braden Michael |
10 Percent Owner |
14,043,975 |
2024-08-05 |
|
| 2 |
Ra Capital Management, Llc |
10 Percent Owner |
2,275,769 |
2016-09-19 |
|
| 3 |
Foresite Capital Management Iii, Llc |
10 Percent Owner |
1,258,243 |
2021-02-10 |
|
| 4 |
Flynn James E |
10 Percent Owner |
964,101 |
2019-07-01 |
|
| 5 |
Walker Neal |
CEO |
274,800 |
2026-02-06 |
|
| 6 |
Ruffo Frank |
Chief Financial Officer |
201,883 |
2022-03-14 |
|
| 7 |
Tullman Stephen A. |
Director |
177,457 |
2018-10-05 |
|
| 8 |
Gordon David N. |
Chief Medical Officer |
147,447 |
2021-07-14 |
|
| 9 |
Ali-jackson Kamil |
Chief Legal Officer |
114,696 |
2021-11-22 |
|
| 10 |
Balthaser Kevin |
Chief Financial Officer |
99,100 |
2026-02-06 |
|
| 11 |
Hall Jesse Wayne |
Chief Medical Officer |
98,100 |
2026-02-06 |
|
| 12 |
Loerop James |
Chief Business Officer |
97,700 |
2026-02-06 |
|
| 13 |
Davis Hugh M. |
President and COO |
96,100 |
2026-02-06 |
|
| 14 |
Kolbeck Roland Wilhelm |
Chief Scientific Officer |
95,700 |
2026-02-06 |
|
| 15 |
Shanler Stuart |
Chief Scientific Officer |
82,200 |
2019-03-04 |
|
| 16 |
Vivo Ventures Vii, Llc |
10 Percent Owner |
65,771 |
2017-03-02 |
|
| 17 |
Manion Douglas J. |
Pres and CEO |
41,813 |
2024-01-03 |
|
| 18 |
Powell Andrew Kenneth William |
Director |
22,863 |
2024-03-05 |
|
| 19 |
Monahan Joseph |
Chief Scientific Officer |
15,000 |
2025-02-04 |
|
| 20 |
Humphries William D. |
Director |
11,580 |
2025-06-09 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-01 |
Balthaser Kevin |
Chief Financial Officer |
Option Exercise (Sell) |
2,375 |
- |
- |
| 2026-02-02 |
Kolbeck Roland Wilhelm |
Chief Scientific Officer |
RSU Award |
95,700 |
- |
- |
| 2026-02-02 |
Hall Jesse Wayne |
Chief Medical Officer |
RSU Award |
98,100 |
- |
- |
| 2026-02-02 |
Davis Hugh M. |
President and COO |
RSU Award |
96,100 |
- |
- |
| 2026-02-02 |
Balthaser Kevin |
Chief Financial Officer |
RSU Award |
99,100 |
- |
- |
| 2026-02-02 |
Loerop James |
Chief Business Officer |
RSU Award |
97,700 |
- |
- |
| 2026-02-02 |
Walker Neal |
CEO |
RSU Award |
274,800 |
- |
- |
| 2026-02-03 |
Davis Hugh M. |
President and COO |
Option Exercise |
18,675 |
- |
- |
| 2026-02-03 |
Balthaser Kevin |
Chief Financial Officer |
Option Exercise (Sell) |
22,025 |
- |
- |
| 2026-02-03 |
Loerop James |
Chief Business Officer |
Option Exercise (Sell) |
20,875 |
- |
- |
| 2026-02-01 |
Loerop James |
Chief Business Officer |
Option Exercise (Sell) |
11,250 |
- |
- |
| 2026-02-03 |
Walker Neal |
CEO |
Option Exercise (Sell) |
63,475 |
- |
- |
| 2026-02-01 |
Balthaser Kevin |
Chief Financial Officer |
Option Exercise (Sell) |
14,750 |
- |
- |
| 2025-02-01 |
Loerop James |
Chief Business Officer |
Tax Withholding of RSU |
15,980 |
$2.48 |
$39.63K |
| 2026-01-02 |
Balthaser Kevin |
Chief Financial Officer |
Option Exercise (Sell) |
13,200 |
- |
- |
| 2026-01-01 |
Balthaser Kevin |
Chief Financial Officer |
Option Exercise (Sell) |
7,500 |
- |
- |
| 2025-12-31 |
Balthaser Kevin |
Chief Financial Officer |
Option Exercise (Sell) |
73,750 |
- |
- |
| 2026-01-02 |
Loerop James |
Chief Business Officer |
Option Exercise (Sell) |
18,150 |
- |
- |
| 2025-12-31 |
Loerop James |
Chief Business Officer |
Option Exercise (Sell) |
73,750 |
- |
- |
| 2026-01-02 |
Walker Neal |
CEO |
Option Exercise (Sell) |
29,150 |
- |
- |
| 2025-12-02 |
Davis Hugh M. |
President and COO |
Option Exercise |
26,750 |
- |
- |
| 2025-08-01 |
Kolbeck Roland Wilhelm |
Chief Scientific Officer |
RSU Award |
145,500 |
- |
- |
| 2025-07-28 |
Kolbeck Roland Wilhelm |
Officer |
Unknown |
- |
- |
- |
| 2025-06-06 |
Humphries William D. |
Director |
Option Exercise (Sell) |
4,793 |
- |
- |
| 2025-06-05 |
Humphries William D. |
Director |
RSU Award |
11,580 |
- |
- |
