International Isotopes (INIS) Stock Price, News & Analysis

Company Overview

International Isotopes Inc. (OTCMKTS:INIS) is a U.S.-based supplier of medical and industrial radioisotopes, stable isotopes, and related radiochemical products. Headquartered in Idaho Falls, Idaho, the company operates a portfolio of production and service facilities that deliver key isotopes used in diagnostic imaging, cancer therapy, and industrial applications. Its product lineup includes molybdenum-99, iodine-131, and lutetium-177 for nuclear medicine, as well as custom stable isotopes for research and manufacturing processes.

In addition to isotope production, International Isotopes provides radiopharmaceutical and analytical laboratory services through its subsidiary network. These services support pharmaceutical development, quality control testing, and environmental monitoring. The company’s integrated approach—from isotope sourcing and processing to end-user product formulation—enables tailored solutions for hospitals, research institutions, and industrial clients across North America, Europe, and Asia Pacific regions.

Founded in 1995, International Isotopes has expanded through strategic partnerships, facility upgrades, and regulatory approvals to enhance production capacity and diversify its product offerings. A key milestone was the establishment of a proprietary molybdenum-99 production process that reduces reliance on aging nuclear reactors, positioning the company to address global shortages in critical medical isotopes.

Under the leadership of CEO Marco Milea, International Isotopes emphasizes safety, regulatory compliance, and process innovation. The management team brings decades of experience in nuclear chemistry, radiopharmaceutical development, and commercial isotope distribution, guiding the firm’s growth strategy and commitment to supply continuity in the rapidly evolving nuclear medicine and research markets.

Key Stats

• Today's Range: $0.09 to $0.09
• 50-Day Range: $0.04 to $0.09
• 52-Week Range: $0.03 to $0.09
• Volume: 53,324 shs
• Average Volume: 104,243 shs
• Market Capitalization: $46.85 million
• P/E Ratio: N/A
• Dividend Yield: N/A
• Price Target: N/A
• Consensus Rating: N/A

International Isotopes Stock Analysis - MarketRank™

International Isotopes scored higher than 3% of companies evaluated by MarketBeat. Scores are calculated by averaging available category scores, with extra weight given to analysis and valuation.

Analyst's Opinion

• Score: N/A
• Analyst Rating: N/A

Consensus Rating

There is not enough analysis data for International Isotopes.

Earnings and Valuation

• Score: 0.0 / 5
• Proj. Earnings Growth: N/A

Price to Book Value per Share Ratio

International Isotopes has a P/B Ratio of 8.90. P/B Ratios above 3 indicate that a company could be overvalued with respect to its assets and liabilities.

Short Interest

• Score: 3.0 / 5
• Short Interest Level: Healthy

Percentage of Shares Shorted

0.02% of the float of International Isotopes has been sold short.

Short Interest Ratio / Days to Cover

International Isotopes has a short interest ratio ("days to cover") of 0.5, which is generally considered an acceptable ratio of short interest to trading volume.

Change versus previous month

Short interest in International Isotopes has recently increased by 3,440.00%, indicating that investor sentiment is decreasing significantly.

Dividend

• Score: 0.0 / 5
• Dividend Strength: N/A

Dividend Yield

International Isotopes does not currently pay a dividend.

Dividend Growth

International Isotopes does not have a long track record of dividend growth.

Sustainability and ESG

• Score: N/A
• Environmental Score: N/A

Percentage of Shares Shorted

0.02% of the float of International Isotopes has been sold short.

Short Interest Ratio / Days to Cover

International Isotopes has a short interest ratio ("days to cover") of 0.5, which is generally considered an acceptable ratio of short interest to trading volume.

Change versus previous month

Short interest in International Isotopes has recently increased by 3,440.00%, indicating that investor sentiment is decreasing significantly.

News and Social Media

• Score: 0.6 / 5
• News Sentiment: N/A

MarketBeat Follows

1 people have added International Isotopes to their MarketBeat watchlist in the last 30 days.

Company Ownership

• Score: 0.8 / 5
• Insider Trading: N/A

Insider Buying vs. Insider Selling

In the past three months, International Isotopes insiders have not sold or bought any company stock.

Percentage Held by Insiders

18.10% of the stock of International Isotopes is held by insiders. A high percentage of insider ownership can be a sign of company health.

INIS Stock Analysis - Frequently Asked Questions

How have INIS shares performed this year?

International Isotopes' stock was trading at $0.0344 at the beginning of 2025. Since then, INIS shares have increased by 158.7% and is now trading at $0.0890.

How were International Isotopes' earnings last quarter?

International Isotopes Inc. (OTCMKTS:INIS) announced its quarterly earnings results on Monday, April, 2nd. The technology company reported $0.00 EPS for the quarter. The technology company earned $1.90 million during the quarter. International Isotopes had a net margin of 0.35% and a trailing twelve-month return on equity of 1.21%.

How do I buy shares of International Isotopes?

Shares of INIS stock can be purchased through any online brokerage account. Popular online brokerages with access to the U.S. stock market include Charles Schwab, E*TRADE, Fidelity, and Vanguard Brokerage Services.

What other stocks do shareholders of International Isotopes own?

Based on aggregate information from My MarketBeat watchlists, some other companies that International Isotopes investors own include Chembio Diagnostics (CEMI), Prospect Capital (PSEC), Calumet (CLMT), Two Harbors Investments (TWO), BlackRock Capital Investment (BKCC), NovoCure (NVCR) and Summit Midstream Partners (SMLP).

Company Calendar

• Last Earnings: 4/02/2018
• Today: 7/16/2025
• Next Earnings (Estimated): 8/12/2025
• Fiscal Year End: 12/31/2025

Industry, Sector and Symbol

• Stock Exchange: OTCMKTS
• Sector: Computer and Technology
• Industry: INSTRU - SCIENTFC
• Sub-Industry: Measuring And Control Equipment
• Current Symbol: OTCMKTS:INIS
• CIK: 1038277
• Web: www.intisoid.com
• Phone: (208) 524-5300
• Fax: 208-524-1411
• Employees: 30
• Year Founded: 1995

Profitability

• EPS (Trailing Twelve Months): N/A
• Trailing P/E Ratio: N/A
• Forward P/E Ratio: N/A
• P/E Growth: N/A
• Net Income: $10 thousand
• Net Margins: 0.35%
• Pretax Margin: 0.35%
• Return on Equity: 1.21%
• Return on Assets: 0.30%

Debt

• Debt-to-Equity Ratio: 0.06
• Current Ratio: 0.99
• Quick Ratio: 0.83

Sales & Book Value

• Annual Sales: $13.90 million
• Price / Sales: 3.37
• Cash Flow: $0.00 per share
• Price / Cash Flow: 114.96
• Book Value: $0.01 per share
• Price / Book: 8.90

Miscellaneous

• Outstanding Shares: 526,390,000
• Free Float: 431,110,000
• Market Cap: $46.85 million
• Optionable: Not Optionable
• Beta: 0.84