Atrium Therapeutics, Inc. (RNA) has 20 known insider and institutional holders on record. The largest holder is RTW INVESTMENTS, LP with 4,795,000 shares. Other notable holders include Boyce Sarah and Edwards Martin.
Over the last 12 months, insiders have made 12 transactions in RNA stock — 8 buys (valued at $674.69K) and 2 sells (valued at $685.24K). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
RNA Insider Ownership
Top Holder
RTW INVESTMENTS, LP
4,795,000 shares
Buys (12 mo)
8
$674.69K value
Sells (12 mo)
2
$685.24K value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Rtw Investments, Lp |
10 Percent Owner |
4,795,000 |
2021-08-06 |
|
| 2 |
Boyce Sarah |
President and CEO |
305,871 |
2025-03-21 |
|
| 3 |
Edwards Martin |
Director |
136,776 |
2021-01-04 |
|
| 4 |
Mccarthy Teresa |
Chief Human Resources Officer |
97,130 |
2025-03-21 |
|
| 5 |
Maclean Michael F |
Chief Financial Officer |
96,720 |
2025-03-21 |
|
| 6 |
Baroldi Joseph |
Chief Operating Officer |
87,000 |
2021-02-04 |
|
| 7 |
Kim Jae B. |
Chief Medical Officer |
82,000 |
2021-02-04 |
|
| 8 |
Flanagan W. Michael |
Chief Scientific Officer |
80,195 |
2025-06-12 |
|
| 9 |
Hughes Steven George |
Chief Medical Officer |
72,850 |
2025-03-21 |
|
| 10 |
Gallagher Kathleen P. |
Chief Program Officer |
50,392 |
2025-06-18 |
|
| 11 |
Mosbrooker Eric |
Chief Commercial Officer |
50,000 |
2025-01-08 |
|
| 12 |
Moriarty John B |
Chief Legal Officer |
50,000 |
2025-01-08 |
|
| 13 |
Calderaro Charles Iii |
Chief Technical Officer |
40,000 |
2025-01-08 |
|
| 14 |
Wong Roderick |
10 Percent Owner |
15,000 |
2021-06-17 |
|
| 15 |
Levin Arthur A |
Director |
10,034 |
2025-06-12 |
|
| 16 |
Wilson Troy Edward |
Director |
10,034 |
2025-06-12 |
|
| 17 |
Boess Carsten |
Director |
6,692 |
2025-06-12 |
|
| 18 |
Kaye Edward M. Md |
Director |
6,692 |
2025-06-12 |
|
| 19 |
Kim Jean Jinsun |
Director |
6,692 |
2025-06-12 |
|
| 20 |
Thompson Tamar |
Director |
6,692 |
2025-06-12 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2025-06-17 |
Gallagher Kathleen P. |
Chief Program Officer |
Informative Sell |
911 |
$30.24 |
$27.55K |
| 2025-06-10 |
Skerjanec Simona |
Director |
RSU Award |
6,692 |
- |
- |
| 2025-06-11 |
Flanagan W. Michael |
Chief Scientific Officer |
Informative Sell |
20,000 |
$32.88 |
$657.69K |
| 2025-06-10 |
Kim Jean Jinsun |
Director |
RSU Award |
6,692 |
- |
- |
| 2025-06-10 |
Thompson Tamar |
Director |
RSU Award |
6,692 |
- |
- |
| 2025-06-10 |
Henig Noreen |
Director |
RSU Award |
6,692 |
- |
- |
| 2025-06-10 |
Wilson Troy Edward |
Director |
RSU Award |
10,034 |
$33.62 |
$337.34K |
| 2025-06-10 |
Kaye Edward M. Md |
Director |
RSU Award |
6,692 |
- |
- |
| 2025-06-10 |
Boess Carsten |
Director |
RSU Award |
6,692 |
- |
- |
| 2025-06-10 |
Levin Arthur A |
Director |
RSU Award |
10,034 |
$33.62 |
$337.34K |
| 2025-06-02 |
Gallagher Kathleen P. |
Chief Program Officer |
Option Exercise (Sell) |
5,875 |
$16.65 |
$97.82K |
| 2025-05-01 |
Gallagher Kathleen P. |
Chief Program Officer |
Option Exercise (Sell) |
5,875 |
$16.65 |
$97.82K |
