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INTS vs RNTX

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Intensity Therapeutics, Inc. Common stock and Rein Therapeutics, Inc. Common Stock

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Daily close · 2026-10-21

Price return

Both stocks start at 0% on the first shared trading day.

INTS-97.89%
RNTX-65.09%
Price return: INTS and RNTXHistorical recorded observations on the same scale. Missing metrics leave gaps.-129%-17%95%206%318%202320242024202520262026

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Split-adjusted closing prices. Dividends are excluded.Year ranges begin January 1 of the end year minus the selected years.
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CONTEXT ATTACHEDINTS + RNTXPrices, financials and SEC filing evidence

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Similarity
53.3%
3 shared / 5 total tags

How similar are their businesses?

The score compares business activities in annual filings released in 2025. Core activities receive four times the weight of material activities. Industries that fewer companies share carry more weight.

BiotechnologyHealthcarePharmaceuticals
How we measure overlap ↗
The businesses behind the score

Industry overlap

Filing-derived business activity overlapCounts of retained positive business classifications. Circle sizes do not encode the counts or the weighted similarity score.INTS only2Shared3RNTX only0

INTS only · 2

Shared activities · 3

RNTX only · 0

No activities in this group.

Positive activities from the two selected annual filings. Expand each group to view all its activities, or use the complete table below. These are classification sets, not revenue shares. The weighted similarity score also accounts for exposure and how common each activity is.
Show business activity table · 5 rows, 3 columns

Core activities receive full weight; material activities receive one quarter. Select a tag to read the filing evidence.

Business activityINTSRNTX
CoreCore
CoreCore
CoreCore
CoreNot tagged
CoreNot tagged

Biotechnology

INTS Core

Annual filing released 2025-03-13 · GPT 6 Luna

ITEM 1. BUSINESS OVERVIEW Intensity Therapeutics, Inc. is a late-stage clinical biotechnology company passionately committed to applying scientific leadership in the field of localized cancer reduction leading to anti-cancer immune activation. Our new approach involves the direct injection into tumors of a unique product created from our DfuseRxSM discovery platform. Intratumoral (“IT”) treatment, or treatment designed to contain a drug inside a tumor without spreading to the rest of the body, has been an objective of clinicians since discovery of chemotherapeutic agents. The challenge with IT treatment approaches is that a tumor’s lipophilic, high fat, dense and pressurized microenvironment is incompatible with and does not absorb water-based products.
Note 1. Description of Business Intensity Therapeutics, Inc. (“the Company”) is a biotechnology company whose treatment approach addresses both the regional and systemic nature of a patient’s cancer. The Company’s DfuseRxSM technology platform has identified a lead drug, INT230-6. The Company is based in Connecticut and was incorporated in Delaware in December 2012. As a result of its initial public offering (the “IPO”) that priced on June 29, 2023, the Company began trading on the Nasdaq Capital Market under the symbol “INTS” on June 30, 2023. The IPO closed on July 5, 2023 at the IPO price of $5.00 per share, at which time the Company issued 3,900,000 shares of our common stock for gross proceeds of $19.5 million. After deducting offering expenses of $2.0 million, the Company received net proceeds received of $17.5 million.
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RNTX Core

Annual filing released 2025-04-07 · GPT 6 Luna

PART I Item 1. Business Overview and Recent Developments We are a clinical stage biopharmaceutical company focused on developing novel therapies for the treatment of orphan pulmonary and fibrosis indications with no approved or limited effective treatments. We currently have two product candidates in clinical development, LTI-03 and LTI-01, and multiple candidates in preclinical development focused on fibrosis indications. Our pipeline includes: •LTI-03, a peptide for which we conducted a Phase 1b dose-ranging, placebo-controlled safety, tolerability, and pharmacodynamic biomarker activity trial in development for the treatment of Idiopathic Pulmonary Fibrosis, or IPF, that has demonstrated the ability in both preclinical studies and clinical trials to protect healthy lung epithelial cells and reduce pro-fibrotic signaling;
•LTI-01, a proenzyme that completed a Phase 2a dose-ranging, placebo-controlled trial and a Phase 1b safety, tolerability and proof of mechanism trial in loculated pleural effusion, or LPE, patients, an indication that has no approved drug treatment; and •preclinical programs targeting cystic fibrosis and a peptide program focused on the Cav1 protein for systemic fibrosis indications.
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Healthcare

INTS Core

Annual filing released 2025-03-13 · GPT 6 Luna

ITEM 1. BUSINESS OVERVIEW Intensity Therapeutics, Inc. is a late-stage clinical biotechnology company passionately committed to applying scientific leadership in the field of localized cancer reduction leading to anti-cancer immune activation. Our new approach involves the direct injection into tumors of a unique product created from our DfuseRxSM discovery platform. Intratumoral (“IT”) treatment, or treatment designed to contain a drug inside a tumor without spreading to the rest of the body, has been an objective of clinicians since discovery of chemotherapeutic agents. The challenge with IT treatment approaches is that a tumor’s lipophilic, high fat, dense and pressurized microenvironment is incompatible with and does not absorb water-based products.
Additionally, there was an increase in the T-cells repertoire relative to control. In July 2024, we initiated and dosed our first patient in a Phase 3 open-label, randomized study (the “INVINCIBLE-3 Study”) testing INT230-6 as a monotherapy compared to the SOC drugs in second-and third-line treatment for certain soft tissue sarcoma subtypes. This study has been authorized by the FDA, Health Canada, the European Medicines Authority, and Australia's Therapeutics Goods Administration. The trial is enrolling patients and is being conducted in eight countries: the US, Australia, Canada, France, Germany, Italy, Poland, and Spain. Up to 60 sarcoma-focused hospitals and other centers are expected to participate from these countries.
Read the annual filing ↗

RNTX Core

Annual filing released 2025-04-07 · GPT 6 Luna

PART I Item 1. Business Overview and Recent Developments We are a clinical stage biopharmaceutical company focused on developing novel therapies for the treatment of orphan pulmonary and fibrosis indications with no approved or limited effective treatments. We currently have two product candidates in clinical development, LTI-03 and LTI-01, and multiple candidates in preclinical development focused on fibrosis indications. Our pipeline includes: •LTI-03, a peptide for which we conducted a Phase 1b dose-ranging, placebo-controlled safety, tolerability, and pharmacodynamic biomarker activity trial in development for the treatment of Idiopathic Pulmonary Fibrosis, or IPF, that has demonstrated the ability in both preclinical studies and clinical trials to protect healthy lung epithelial cells and reduce pro-fibrotic signaling;
Our actual results may differ materially from those anticipated in these forward-looking statements as a result of certain factors. We discuss factors that we believe could cause or contribute to these differences below and elsewhere in this report, including those set forth under Item 1A. “Risk Factors” in this Annual Report on Form 10-K. Overview and Recent Developments We are a clinical stage biopharmaceutical company focused on developing novel therapies for the treatment of orphan pulmonary and fibrosis indications with no approved or limited effective treatments. We currently have two product candidates in clinical development, LTI-03 and LTI-01, and multiple candidates in preclinical development focused on fibrosis indications.
Read the annual filing ↗

Pharmaceuticals

INTS Core

Annual filing released 2025-03-13 · GPT 6 Luna

Our product candidates include novel formulations consisting of potent anti-cancer drugs mixed together with these amphiphilic agents. Our lead product candidate, INT230-6, is primarily comprised of three components: (i) cisplatin, a proven anti-cancer cytotoxic agent, (ii) vinblastine sulfate, also a proven anti-cancer cytotoxic agent, and (iii) an amphiphilic molecule (“SHAO”) which enables the two cytotoxic agents to disperse through a tumor and diffuse into cancer cells following a direct intratumoral injection. These three components are mixed and combined into one vial at a fixed ratio. Cisplatin and vinblastine sulfate are both generic and available to purchase in bulk supply commercially. The United States Food & Drug Administration (“FDA”) has approved both drugs as intravenous agents for several types of cancers.
Additionally, there was an increase in the T-cells repertoire relative to control. In July 2024, we initiated and dosed our first patient in a Phase 3 open-label, randomized study (the “INVINCIBLE-3 Study”) testing INT230-6 as a monotherapy compared to the SOC drugs in second-and third-line treatment for certain soft tissue sarcoma subtypes. This study has been authorized by the FDA, Health Canada, the European Medicines Authority, and Australia's Therapeutics Goods Administration. The trial is enrolling patients and is being conducted in eight countries: the US, Australia, Canada, France, Germany, Italy, Poland, and Spain. Up to 60 sarcoma-focused hospitals and other centers are expected to participate from these countries.
Read the annual filing ↗

RNTX Core

Annual filing released 2025-04-07 · GPT 6 Luna

PART I Item 1. Business Overview and Recent Developments We are a clinical stage biopharmaceutical company focused on developing novel therapies for the treatment of orphan pulmonary and fibrosis indications with no approved or limited effective treatments. We currently have two product candidates in clinical development, LTI-03 and LTI-01, and multiple candidates in preclinical development focused on fibrosis indications. Our pipeline includes: •LTI-03, a peptide for which we conducted a Phase 1b dose-ranging, placebo-controlled safety, tolerability, and pharmacodynamic biomarker activity trial in development for the treatment of Idiopathic Pulmonary Fibrosis, or IPF, that has demonstrated the ability in both preclinical studies and clinical trials to protect healthy lung epithelial cells and reduce pro-fibrotic signaling;
•LTI-01, a proenzyme that completed a Phase 2a dose-ranging, placebo-controlled trial and a Phase 1b safety, tolerability and proof of mechanism trial in loculated pleural effusion, or LPE, patients, an indication that has no approved drug treatment; and •preclinical programs targeting cystic fibrosis and a peptide program focused on the Cav1 protein for systemic fibrosis indications.
Read the annual filing ↗

Immunotherapy

INTS Core

Annual filing released 2025-03-13 · GPT 6 Luna

Evidence shows the mechanism of tumor killing achieved by our drug candidate also leads to systemic immune activation and T-cell repertoire expansion in certain cancers. Our platform creates patented anti-cancer product candidates comprising active anti-cancer agents and amphiphilic molecules. Amphiphilic molecules have two distinct components: one part is soluble in water and the other is soluble in fat or oils. When an amphiphilic compound is mixed with therapeutic agents, such as chemotherapies, the agents also become soluble in both fat and water.
especially for tumors larger than 2 centimeters in longest diameter. We also sought to determine whether a local or whole-body anti-cancer immune response could be induced. The INVINCIBLE-2 Study demonstrated a high order of necrosis in presurgical breast cancer tumors in the period from diagnosis to surgery, with some patients experiencing greater than 95% necrosis of the tumor. Data from the INVINCIBLE-2 Study demonstrated that INT230-6 had a favorable safety profile. There was also an increase of certain types of immune cells (CD4+ and NK T-cells) in the tumor and blood.
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RNTX Not tagged

Annual filing released 2025-04-07 · GPT 6 Luna

This activity has no positive tag in the selected filing snapshot.

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Oncology

INTS Core

Annual filing released 2025-03-13 · GPT 6 Luna

ITEM 1. BUSINESS OVERVIEW Intensity Therapeutics, Inc. is a late-stage clinical biotechnology company passionately committed to applying scientific leadership in the field of localized cancer reduction leading to anti-cancer immune activation. Our new approach involves the direct injection into tumors of a unique product created from our DfuseRxSM discovery platform. Intratumoral (“IT”) treatment, or treatment designed to contain a drug inside a tumor without spreading to the rest of the body, has been an objective of clinicians since discovery of chemotherapeutic agents. The challenge with IT treatment approaches is that a tumor’s lipophilic, high fat, dense and pressurized microenvironment is incompatible with and does not absorb water-based products.
Additionally, there was an increase in the T-cells repertoire relative to control. In July 2024, we initiated and dosed our first patient in a Phase 3 open-label, randomized study (the “INVINCIBLE-3 Study”) testing INT230-6 as a monotherapy compared to the SOC drugs in second-and third-line treatment for certain soft tissue sarcoma subtypes. This study has been authorized by the FDA, Health Canada, the European Medicines Authority, and Australia's Therapeutics Goods Administration. The trial is enrolling patients and is being conducted in eight countries: the US, Australia, Canada, France, Germany, Italy, Poland, and Spain. Up to 60 sarcoma-focused hospitals and other centers are expected to participate from these countries.
Read the annual filing ↗

RNTX Not tagged

Annual filing released 2025-04-07 · GPT 6 Luna

This activity has no positive tag in the selected filing snapshot.

Read the annual filing ↗
What each company does

Compare the businesses

Intensity Therapeutics, Inc. Common stock

INTS · XNAS

Intensity Therapeutics, Inc., a late-stage clinical biotechnology company, engages in the provision of treatment for the regional and systemic nature of cancer in the United States. Its lead product candidate includes INT230-6, which is in Phase 3 clinical studies for the treatment of soft tissue sarcoma; and neoadjuvant and metastatic triple negative breast cancer which is in Phase 2 clinical trials. The company was incorporated in 2012 and is headquartered in Shelton, Connecticut.

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Rein Therapeutics, Inc. Common Stock

RNTX · XNAS

Rein Therapeutics Inc., a biopharmaceutical company, focuses on developing medicines to address unmet medical needs in orphan pulmonary and fibrosis indications in the United States. The company's lead product candidate is LTI-03, a peptide, which is in Phase 1b clinical trial for the treatment of idiopathic pulmonary fibrosis (IPF). It also offers LTI-01, a proenzyme that has completed Phase 1b and Phase 2a clinical trials in LPE patients for the treatment of loculated pleural effusion. The company's pipeline also includes preclinical programs targeting cystic fibrosis and a peptide program focused on the caveolin-1 protein for systemic fibrosis indications; and LTI-05, an epithelial sodium channel for the treatment of cystic fibrosis. The company was formerly known as Aileron Therapeutics, Inc. and changed its name to Rein Therapeutics Inc. in February 2007. The company was incorporated in 2001 and is headquartered in Austin, Texas.

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Financial data

Fundamentals side by side

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Show fundamentals table · 11 rows, 3 columns
MetricINTSRNTX
ExchangeXNASXNAS
SectorHealthcareHealthcare
IndustryBiotechnologyBiotechnology
Market observation2026-10-212026-10-21
Closing price (USD)$3.14$0.62
Market cap (USD)$10.26M$53.90M
P/E (TTM)UnavailableUnavailable
Latest annual period2025-12-312025-12-31
Revenue (annual, USD)Unavailable$0.00
Net income (annual, USD)$-11.61M$-49.87M
Gross margin (annual)UnavailableUnavailable

USD values from stored observations. Fiscal period endings and availability dates may differ.

INTS period ended 2025-12-31 · available 2026-03-27 · SEC filing ↗RNTX period ended 2025-12-31 · available 2026-03-26 · SEC filing ↗

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Behind the comparison

Sources and methodology

Price return uses split-adjusted daily closes and excludes dividends. Both stocks start on the first shared trading day within the selected window. Unavailable metrics leave gaps.

Financials use SEC canonical statements available by the displayed cutoff, retaining each company's fiscal period end. Annual and quarterly amounts are shown separately. P/E is unavailable when earnings do not support a positive ratio.

Business overlap uses industry tags from annual filings released in 2025. Each core activity receives full weight; each material activity receives one quarter of that weight. Rarer industries carry more weight. We sum the smaller exposure for each shared activity and divide it by the sum of the larger exposure for every activity in either company. This measures business overlap, rather than price correlation or expected returns.

Search eligibility requires distinct issuers, a shared core category and at least 20% weighted overlap, supported by industry or sector evidence and specific business activities. Broad classifications require stronger overlap within the same sector. Comparisons also need at least 252 shared price observations within two years, recent trading and a common sourced revenue or net-income trend. Missing P/E or gross margin alone does not exclude a comparison. The eligibility snapshot refreshes daily. Related comparisons use a separate, stricter peer rule; their ten-peer discovery limit does not limit search eligibility. Other stock pairs remain available in the comparison tool.

Statements available through 2026-10-22. Industry snapshot: 2025-12-31 · 5,721 classified issuers.

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