Phio Pharmaceuticals Corp. (PHIO)
NASDAQ: PHIO · Real-Time Price · USD
1.160
-0.010 (-0.85%)
At close: Mar 6, 2026, 4:00 PM EST
1.140
-0.020 (-1.71%)
After-hours: Mar 6, 2026, 7:28 PM EST

Company Description

Phio Pharmaceuticals Corp., a a clinical stage biotechnology company, engages in the development of immuno-oncology therapeutics in the United States.

The company is developing PH-762, an INTASYL compound in Phase 1b dose-escalating clinical trials to reduce the expression of cell death protein 1 (PD-1), a protein that inhibits T cells’ ability to kill cancer cells; and PH-762 treated double positive tumor infiltrating lymphocytes, which is in Phase 1 clinical trials to treat advanced melanoma and other advanced solid tumors.

It is also developing PH-894, an INTASYL compound in IND enabling studies to silence BRD4, a protein that controls gene expression in both T cells and tumor cells, effecting the immune system and the tumor.

The company was formerly known as RXi Pharmaceuticals Corporation and changed its name to Phio Pharmaceuticals Corp. in November 2018.

Phio Pharmaceuticals Corp. was incorporated in 2011 and is based in Marlborough, Massachusetts.

Phio Pharmaceuticals Corp.
Phio Pharmaceuticals logo
Country United States
Founded 2011
Industry Biotechnology
Sector Healthcare
Employees 5
CEO Robert Bitterman

Contact Details

Address:
11 Apex Drive, Suite 300A
Marlborough, Massachusetts 01752
United States
Phone 508 767 3861
Website phiopharma.com

Stock Details

Ticker Symbol PHIO
Exchange NASDAQ
Stock Type Common Stock
Fiscal Year January - December
Reporting Currency USD
CIK Code 0001533040
CUSIP Number 71880W303
ISIN Number US71880W5013
Employer ID 45-3215903
SIC Code 2834

Key Executives

Name Position
Robert J. Bitterman President, Chief Executive Officer and Chairman
Linda M. Mahoney Senior Vice President of Development

Latest SEC Filings

Date Type Title
Mar 5, 2026 10-K Annual Report
Mar 5, 2026 8-K Current Report
Feb 18, 2026 8-K Current Report
Feb 17, 2026 SCHEDULE 13G/A Filing
Feb 13, 2026 SCHEDULE 13G/A Filing
Feb 10, 2026 8-K Current Report
Jan 20, 2026 8-K Current Report
Dec 23, 2025 8-K Current Report
Dec 11, 2025 SCHEDULE 13G/A Filing
Dec 4, 2025 424B3 Prospectus