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RNA

Equity

Atrium Therapeutics, Inc. Common Stock

Health Care · Biotechnology

$14.75

+14.75 (+0.00%)

Open

N/A

Day Range

$13.14 - $15.93

52W Range

$13.14 - $73.06

Volume

8M

Price History

Key Statistics

Market Cap

N/A

P/E Ratio

N/A

EPS

N/A

Dividend Yield

N/A

P/B Ratio

N/A

Payout Ratio

N/A

ROE

N/A

Debt/Equity

N/A

Insider Activity

Last 3 months: 13 sells ($4.2M)
Date Insider Type Shares Value
Jan 21, 2026

HUGHES STEVEN GEORGE

Officer

Sell 4,895 $354.6K
Jan 21, 2026

LEVIN ARTHUR A.

Director

Sell 1,758 $127.4K
Jan 21, 2026

FLANAGAN WILLIAM MICHAEL

Officer

Sell 6,534 $473.4K
Jan 21, 2026

MACLEAN MICHAEL F.

Chief Financial Officer

Sell 4,542 $329.1K
Jan 21, 2026

MCCARTHY TERESA

Officer

Sell 2,929 $212.2K
Jan 21, 2026

BOYCE SARAH

Chief Executive Officer

Sell 14,387 $1.0M
Jan 7, 2026

HUGHES STEVEN GEORGE

Officer

Sell 2,373 $171.4K
Jan 7, 2026

BOYCE SARAH

Chief Executive Officer

Sell 8,576 $619.4K
Jan 7, 2026

MORIARTY JOHN B

Officer

Sell 2,374 $171.5K
Jan 7, 2026

MACLEAN MICHAEL F.

Chief Financial Officer

Sell 1,974 $142.6K

Institutional Ownership

Holder Shares % Held Value
Vanguard Group Inc 13,649,250 8.80% $201.3M
Blackrock Inc. 12,850,801 8.28% $189.5M
RA Capital Management, L.P. 8,641,031 5.57% $127.5M
Janus Henderson Group PLC 6,939,503 4.47% $102.4M
Balyasny Asset Management LP 6,040,590 3.89% $89.1M
Pentwater Capital Management Lp 6,026,500 3.88% $88.9M
Avoro Capital Advisors LLC 5,455,000 3.52% $80.5M
HBK Investments L P 4,365,000 2.81% $64.4M
State Street Corporation 4,097,885 2.64% $60.4M
Goldman Sachs Group Inc 3,776,785 2.43% $55.7M

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About Atrium Therapeutics, Inc. Common Stock

Atrium Therapeutics, Inc., a biopharmaceutical company, focuses on delivery of RNA therapeutics to the heart to transform the care for people living with cardiomyopathies. The company was formerly known as Bryce Therapeutics, Inc. Bryce Therapeutics, Inc. was incorporated in 2025 and is headquartered in San Diego, California.

Dividend Safety

Assessment based on payout ratio, debt levels, profit margins, and dividend growth track record.

50

Borderline

Based on 4 fundamental factors

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