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CRBU vs PULM

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Caribou Biosciences, Inc. Common Stock and Pulmatrix, Inc. Common Stock

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Daily close · 2026-10-20

Price return

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

CRBU-96.82%
PULM-91.97%
Price return: CRBU and PULMHistorical recorded observations on the same scale. Missing metrics leave gaps.-112%-59%-6%47%100%202120222023202420252026

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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 ATTACHEDCRBU + PULMPrices, financials and SEC filing evidence

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Similarity
61.7%
3 shared / 6 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.CRBU only3Shared3PULM only0

CRBU only · 3

Shared activities · 3

PULM 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 · 6 rows, 3 columns

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

Business activityCRBUPULM
CoreCore
CoreCore
CoreCore
CoreNot tagged
MaterialNot tagged
MaterialNot tagged

Biotechnology

CRBU Core

Annual filing released 2025-03-10 · GPT 6 Luna

Table of Contents PART I Item 1. Business. Overview We are a clinical-stage Clustered Regularly Interspaced Short Palindromic Repeats (“CRISPR”) genome-editing biopharmaceutical company dedicated to developing transformative therapies for patients with devastating diseases. Our genome-editing platform, including our novel chRDNA (CRISPR hybrid RNA-DNA, or “chRDNA,” pronounced “chardonnay”) technology, enables more precise genome editing of allogeneic cell therapies. Our allogeneic chimeric antigen receptor (“CAR”) -T (“CAR-T”) cell therapy product candidates are manufactured in advance with cells from healthy donors, with the goal of enabling broad patient access, rapid patient treatment, and increased manufacturing scale.
Segments Operating segments are defined as components of an entity about which separate discrete information is available for evaluation by the chief operating decision maker (“CODM”) in deciding how to allocate resources and in assessing performance. The CODM is our president and chief executive officer. We view our operations as, and manage our business in, one operating segment, which is the business of developing allogeneic CAR-T cell therapies (see Note 15, “Segment Information”). Concentrations of Credit Risk and Other Uncertainties Financial instruments that potentially subject us to concentration of credit risk consist of cash and cash equivalents, accounts receivable, contract assets, other receivables, and investments in marketable securities and equity securities.
Read the annual filing ↗

PULM Core

Annual filing released 2025-03-21 · GPT 6 Luna

We are a biopharmaceutical company that has focused on the development of novel inhaled therapeutic products intended to prevent and treat migraine and respiratory diseases with important unmet medical needs using our patented iSPERSE™ technology. Our proprietary product pipeline includes treatments for central nervous system (“CNS”) disorders such as acute migraine and serious lung diseases such as Chronic Obstructive Pulmonary Disease (“COPD”) and allergic bronchopulmonary aspergillosis (“ABPA”). Our product candidates are based on our proprietary engineered dry powder delivery platform, iSPERSE™, which seeks to improve therapeutic delivery to the lungs by optimizing pharmacokinetics and reducing systemic side effects to improve patient outcomes.
Our goal has been to develop breakthrough therapeutic products that are safe, convenient, and more effective than the existing therapeutic products for respiratory and other diseases where iSPERSE™ properties are advantageous. Our current pipeline of clinical assets is aligned to this goal and includes iSPERSE™-based therapeutic candidates which target the prevention and treatment of a range of diseases, including CNS disorders and pulmonary diseases. These therapeutic candidates include PUR3100 for the treatment of acute migraine, PUR1800 for the treatment of acute exacerbations of chronic obstructive pulmonary disease (“AECOPD”), and PUR1900 for the treatment of ABPA in patients with asthma and in patients with cystic fibrosis (“CF”). Each program is enabled by its unique iSPERSE™ formulation designed to achieve specific therapeutic objectives.
Read the annual filing ↗

Healthcare

CRBU Core

Annual filing released 2025-03-10 · GPT 6 Luna

Table of Contents PART I Item 1. Business. Overview We are a clinical-stage Clustered Regularly Interspaced Short Palindromic Repeats (“CRISPR”) genome-editing biopharmaceutical company dedicated to developing transformative therapies for patients with devastating diseases. Our genome-editing platform, including our novel chRDNA (CRISPR hybrid RNA-DNA, or “chRDNA,” pronounced “chardonnay”) technology, enables more precise genome editing of allogeneic cell therapies. Our allogeneic chimeric antigen receptor (“CAR”) -T (“CAR-T”) cell therapy product candidates are manufactured in advance with cells from healthy donors, with the goal of enabling broad patient access, rapid patient treatment, and increased manufacturing scale.
We use our chRDNA technologies to armor our cell therapies through multiple genome-editing strategies, such as checkpoint disruption, immune cloaking, or a combination of these two strategies, to enhance activity against devastating diseases. We are advancing our pipeline of allogeneic CAR-T cell therapies with the following four clinical development programs targeting the treatment of hematologic malignancies and autoimmune diseases: •CB-010: an allogeneic anti-CD19 CAR-T cell therapy, being evaluated in patients with relapsed or refractory B cell non-Hodgkin lymphoma (“r/r B-NHL”) in our ANTLER phase 1 clinical trial •CB-010: also being evaluated in patients with lupus nephritis (“LN”) and in patients with extrarenal lupus (“ERL”) in our GALLOP phase 1 clinical trial •CB-011: an allogeneic anti-BCMA CAR-T cell therapy, being evaluated in patients with relapsed or refractory multiple my
Read the annual filing ↗

PULM Core

Annual filing released 2025-03-21 · GPT 6 Luna

We are a biopharmaceutical company that has focused on the development of novel inhaled therapeutic products intended to prevent and treat migraine and respiratory diseases with important unmet medical needs using our patented iSPERSE™ technology. Our proprietary product pipeline includes treatments for central nervous system (“CNS”) disorders such as acute migraine and serious lung diseases such as Chronic Obstructive Pulmonary Disease (“COPD”) and allergic bronchopulmonary aspergillosis (“ABPA”). Our product candidates are based on our proprietary engineered dry powder delivery platform, iSPERSE™, which seeks to improve therapeutic delivery to the lungs by optimizing pharmacokinetics and reducing systemic side effects to improve patient outcomes.
Our goal has been to develop breakthrough therapeutic products that are safe, convenient, and more effective than the existing therapeutic products for respiratory and other diseases where iSPERSE™ properties are advantageous. Our current pipeline of clinical assets is aligned to this goal and includes iSPERSE™-based therapeutic candidates which target the prevention and treatment of a range of diseases, including CNS disorders and pulmonary diseases. These therapeutic candidates include PUR3100 for the treatment of acute migraine, PUR1800 for the treatment of acute exacerbations of chronic obstructive pulmonary disease (“AECOPD”), and PUR1900 for the treatment of ABPA in patients with asthma and in patients with cystic fibrosis (“CF”). Each program is enabled by its unique iSPERSE™ formulation designed to achieve specific therapeutic objectives.
Read the annual filing ↗

Pharmaceuticals

CRBU Core

Annual filing released 2025-03-10 · GPT 6 Luna

Table of Contents PART I Item 1. Business. Overview We are a clinical-stage Clustered Regularly Interspaced Short Palindromic Repeats (“CRISPR”) genome-editing biopharmaceutical company dedicated to developing transformative therapies for patients with devastating diseases. Our genome-editing platform, including our novel chRDNA (CRISPR hybrid RNA-DNA, or “chRDNA,” pronounced “chardonnay”) technology, enables more precise genome editing of allogeneic cell therapies. Our allogeneic chimeric antigen receptor (“CAR”) -T (“CAR-T”) cell therapy product candidates are manufactured in advance with cells from healthy donors, with the goal of enabling broad patient access, rapid patient treatment, and increased manufacturing scale.
We use our chRDNA technologies to armor our cell therapies through multiple genome-editing strategies, such as checkpoint disruption, immune cloaking, or a combination of these two strategies, to enhance activity against devastating diseases. We are advancing our pipeline of allogeneic CAR-T cell therapies with the following four clinical development programs targeting the treatment of hematologic malignancies and autoimmune diseases: •CB-010: an allogeneic anti-CD19 CAR-T cell therapy, being evaluated in patients with relapsed or refractory B cell non-Hodgkin lymphoma (“r/r B-NHL”) in our ANTLER phase 1 clinical trial •CB-010: also being evaluated in patients with lupus nephritis (“LN”) and in patients with extrarenal lupus (“ERL”) in our GALLOP phase 1 clinical trial •CB-011: an allogeneic anti-BCMA CAR-T cell therapy, being evaluated in patients with relapsed or refractory multiple my
Read the annual filing ↗

PULM Core

Annual filing released 2025-03-21 · GPT 6 Luna

We are a biopharmaceutical company that has focused on the development of novel inhaled therapeutic products intended to prevent and treat migraine and respiratory diseases with important unmet medical needs using our patented iSPERSE™ technology. Our proprietary product pipeline includes treatments for central nervous system (“CNS”) disorders such as acute migraine and serious lung diseases such as Chronic Obstructive Pulmonary Disease (“COPD”) and allergic bronchopulmonary aspergillosis (“ABPA”). Our product candidates are based on our proprietary engineered dry powder delivery platform, iSPERSE™, which seeks to improve therapeutic delivery to the lungs by optimizing pharmacokinetics and reducing systemic side effects to improve patient outcomes.
Our goal has been to develop breakthrough therapeutic products that are safe, convenient, and more effective than the existing therapeutic products for respiratory and other diseases where iSPERSE™ properties are advantageous. Our current pipeline of clinical assets is aligned to this goal and includes iSPERSE™-based therapeutic candidates which target the prevention and treatment of a range of diseases, including CNS disorders and pulmonary diseases. These therapeutic candidates include PUR3100 for the treatment of acute migraine, PUR1800 for the treatment of acute exacerbations of chronic obstructive pulmonary disease (“AECOPD”), and PUR1900 for the treatment of ABPA in patients with asthma and in patients with cystic fibrosis (“CF”). Each program is enabled by its unique iSPERSE™ formulation designed to achieve specific therapeutic objectives.
Read the annual filing ↗

Immunotherapy

CRBU Core

Annual filing released 2025-03-10 · GPT 6 Luna

Table of Contents PART I Item 1. Business. Overview We are a clinical-stage Clustered Regularly Interspaced Short Palindromic Repeats (“CRISPR”) genome-editing biopharmaceutical company dedicated to developing transformative therapies for patients with devastating diseases. Our genome-editing platform, including our novel chRDNA (CRISPR hybrid RNA-DNA, or “chRDNA,” pronounced “chardonnay”) technology, enables more precise genome editing of allogeneic cell therapies. Our allogeneic chimeric antigen receptor (“CAR”) -T (“CAR-T”) cell therapy product candidates are manufactured in advance with cells from healthy donors, with the goal of enabling broad patient access, rapid patient treatment, and increased manufacturing scale.
We use our chRDNA technologies to armor our cell therapies through multiple genome-editing strategies, such as checkpoint disruption, immune cloaking, or a combination of these two strategies, to enhance activity against devastating diseases. We are advancing our pipeline of allogeneic CAR-T cell therapies with the following four clinical development programs targeting the treatment of hematologic malignancies and autoimmune diseases: •CB-010: an allogeneic anti-CD19 CAR-T cell therapy, being evaluated in patients with relapsed or refractory B cell non-Hodgkin lymphoma (“r/r B-NHL”) in our ANTLER phase 1 clinical trial •CB-010: also being evaluated in patients with lupus nephritis (“LN”) and in patients with extrarenal lupus (“ERL”) in our GALLOP phase 1 clinical trial •CB-011: an allogeneic anti-BCMA CAR-T cell therapy, being evaluated in patients with relapsed or refractory multiple my
Read the annual filing ↗

PULM Not tagged

Annual filing released 2025-03-21 · GPT 6 Luna

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

Read the annual filing ↗

Oncology

CRBU Material

Annual filing released 2025-03-10 · GPT 6 Luna

We use our chRDNA technologies to armor our cell therapies through multiple genome-editing strategies, such as checkpoint disruption, immune cloaking, or a combination of these two strategies, to enhance activity against devastating diseases. We are advancing our pipeline of allogeneic CAR-T cell therapies with the following four clinical development programs targeting the treatment of hematologic malignancies and autoimmune diseases: •CB-010: an allogeneic anti-CD19 CAR-T cell therapy, being evaluated in patients with relapsed or refractory B cell non-Hodgkin lymphoma (“r/r B-NHL”) in our ANTLER phase 1 clinical trial •CB-010: also being evaluated in patients with lupus nephritis (“LN”) and in patients with extrarenal lupus (“ERL”) in our GALLOP phase 1 clinical trial •CB-011: an allogeneic anti-BCMA CAR-T cell therapy, being evaluated in patients with relapsed or refractory multiple my
Our Pipeline We are focused on the development of our pipeline of allogeneic CAR-T cell therapies. We are advancing four clinical-stage programs from our allogeneic CAR-T cell therapy platform targeting the treatment of hematologic malignancies and autoimmune diseases. Our pipeline is shown below:
Read the annual filing ↗

PULM Not tagged

Annual filing released 2025-03-21 · GPT 6 Luna

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

Read the annual filing ↗

Technology

CRBU Material

Annual filing released 2025-03-10 · GPT 6 Luna

Components of Results of Operations Licensing and Collaboration Revenue We have not generated any revenue from product sales to date and do not expect to generate any revenue from the sale of products in the foreseeable future. We cannot predict if, when, or to what extent we will generate revenue from the commercialization and sale of our product candidates if we succeed in obtaining regulatory approval for these product candidates. To date, all of our revenue consists of licensing and collaboration revenue earned from collaboration and/or licensing agreements entered into with third parties, including related parties. Under these agreements, we license rights to certain intellectual property controlled by us. The terms of these arrangements typically include payments to us of one or 100 Table of Contents
To achieve this core principle, we apply the following five steps (i) identify the contract with the customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when or as we satisfy a performance obligation. Our revenues are primarily derived through license and/or license and collaboration agreements. The terms of these types of agreements may include (i) licenses for our technology, (ii) research and development services, and (iii) services or obligations in connection with our participation in research or governance committees.
Read the annual filing ↗

PULM Not tagged

Annual filing released 2025-03-21 · 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

Caribou Biosciences, Inc. Common Stock

CRBU · XNAS

Caribou Biosciences, Inc., a clinical-stage biopharmaceutical company, engages in the development of genome-edited allogeneic cell therapies for the treatment of hematologic malignancies and autoimmune diseases in the United States and internationally. The company's lead product candidate include CB-010, an allogeneic anti-CD19 CAR-T cell therapy that is in phase 1 clinical trial to treat relapsed or refractory B cell non-Hodgkin lymphoma, refractory systemic lupus erythematosus, lupus nephritis, and extrarenal lupus. It also develops CB-011, an anti-BCMA allogeneic CAR-T cell therapy that is in phase 1 clinical trial for the treatment of relapsed or refractory multiple myeloma; and CB-012, an allogeneic anti-CD371 CAR-T cell therapy that is in phase 1 clinical trial for the treatment of relapsed or refractory acute myeloid leukemia. Caribou Biosciences, Inc. was incorporated in 2011 and is headquartered in Berkeley, California.

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Pulmatrix, Inc. Common Stock

PULM · XNAS

Pulmatrix, Inc., a clinical stage biotechnology company, focused on development of novel inhaled therapeutic products to prevent and treat respiratory and other diseases with unmet medical needs in the United States. The company offers iSPERSE, an engineered dry powder delivery platform, which enables delivery of small or large molecule drugs to the lungs by inhalation for local or systemic applications. It engages in developing PUR1800, a narrow spectrum kinase inhibitor completed Phase 1b clinical trials for the treatment of acute exacerbations in chronic obstructive pulmonary disease; PUR1900 for the treatment of allergic bronchopulmonary aspergillosis in patients with asthma and cystic fibrosis; and PUR3100, an iSPERSE formulation of dihydroergotamine which is in Phase 1 for the treatment of acute migraine. It has a license agreement with RespiVert Ltd. for access to a portfolio of kinase inhibitor compounds. The company was founded in 2003 and is headquartered in Framingham, Massachusetts.

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Financial data

Fundamentals side by side

Explore financial charts ↑
Show fundamentals table · 11 rows, 3 columns
MetricCRBUPULM
ExchangeXNASXNAS
SectorHealthcareHealthcare
IndustryBiotechnologyBiotechnology
Market observation2026-10-202026-10-20
Closing price (USD)$0.52$1.43
Market cap (USD)$55.64M$5.22M
P/E (TTM)UnavailableUnavailable
Latest annual period2025-12-312025-12-31
Revenue (annual, USD)$11.16MUnavailable
Net income (annual, USD)$-148.13M$-5.16M
Gross margin (annual)UnavailableUnavailable

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

CRBU period ended 2025-12-31 · available 2026-03-05 · SEC filing ↗PULM period ended 2025-12-31 · available 2026-06-16 · SEC filing ↗

Related stock comparisons

Browse all CRBU comparisons ↗ · Browse all PULM comparisons ↗

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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