Danaher beat on revenue, earnings and cash flow in the third quarter, with sales of $6.1 billion, 3% core growth and adjusted EPS of $1.89 up about 10%, led by bioprocessing consumables and better-than-expected Cepheid respiratory revenue. Bioprocessing equipment fell in the high teens as customers awaited policy clarity, while China diagnostics and life-science research markets remained pressured. The company generated $1.4 billion of free cash flow, authorized a new 35 million share buyback, and set an initial 2026 framework of 3%-6% core growth and high-single-digit EPS growth, with equipment assumed flat and a modest China diagnostics headwind.
Good morning everyone and thanks for joining us on the call. With us today are Rainer Blair, our President and Chief Executive Officer, and Matt McGrew, our Executive Vice President and Chief Financial Officer. I'd like to point out that our earnings release, quarterly report on Form 10-Q, the slide presentation supplementing today's call, the reconciliations and other information required by SEC Regulation G relating to any non-GAAP financial measures provided during the call, and a note containing details of historical and anticipated future financial performance are all available on the Investors section of our website www.danaher.com under the heading Quarterly Earnings. The audio portion of this call will be archived on the Investors section of our website later today under the heading Events and Presentations and will remain archived until our next quarterly call. A dial-in replay of this call will also be available until November 4th, 2025.
During the presentation we will describe certain of the more significant factors that impacted year-over-year performance. Our Form 10-Q and the supplemental materials describe additional factors that impacted year-over-year performance. Unless otherwise noted, all references in these remarks and supplemental materials to company-specific financial metrics relate to the third quarter of 2025 and all references to period-to-period increases or decreases in financial metrics are year-over-year. We may also describe certain products and devices which have applications submitted and pending for certain regulatory approvals or are available only in certain markets. During the call we will make forward-looking statements within the meaning of the federal securities laws, including statements regarding events or developments that we believe or anticipate will or may occur in the future.
These forward-looking statements are subject to a number of risks and uncertainties including those set forth in our SEC filings and actual results might differ materially from any forward-looking statements that we make today. These forward-looking statements speak only as of the date that they are made and we do not assume any obligation to update any forward-looking statements except as required by law. With that, I'd like to turn the call over to Rainer.
All right, thank you John and good morning everyone. We appreciate you joining us on the call today. We're encouraged by our strong third quarter results. Our team's DBS driven execution paired with continued momentum in our bioprocessing business and better than expected respiratory revenue at Cepheid enabled us to exceed our revenue, earnings and cash flow expectations across our end markets. Underlying conditions in the third quarter were generally consistent with what we saw in the first half of the year in pharma. Global production of monoclonal antibodies, where the majority of our exposure lies, remained robust. We continued to see a modest recovery in pharma R&D spending, though it remains below historical levels in academic and government demand was stable sequentially but remained soft amid ongoing uncertainty around research funding. Despite some encouraging headlines late in the quarter, clinical diagnostics and applied markets held up well.
Now we remain intensely focused on what we can control to continue delivering for our customers, associates and shareholders. Our team is leveraging the Danaher Business System to mitigate ongoing geopolitical and policy related pressures and drive meaningful productivity gains across our businesses. At the same time, we're continuing to invest in innovation to strengthen our long term competitive position, including accelerating digital and artificial intelligence initiatives. We're accustomed to tackling challenges head on and turning them into opportunities and we expect that mindset and momentum to continue as we move forward into 2026 and beyond. Let's take a closer look at our third quarter 2025 results. Sales were $6.1 billion in the third quarter and we delivered 3% core revenue growth. Geographically, core revenues in developed markets were up mid single digits with North America up mid single digits and Western Europe approximately flat.
Core revenues in high growth markets were up low single digits as solid performance outside of China was offset by a mid single digit decline in China. Growth in our biotechnology and life sciences businesses in China was more than offset by declines in diagnostics due to volume based procurement and reimbursement policy changes implemented in the last 12 months. Our gross profit margin for the third quarter was 58.2%, and our adjusted operating profit margin of 27.9% was up 40 basis points year-over-year as the favorable impacts of higher volume leverage and disciplined cost management more than offset the impact of productivity investments. Adjusted diluted net earnings per common share of $1.89 were up approximately 10% year-over-year.
We generated $1.4 billion of free cash flow in the quarter and $3.5 billion in the first three quarters of the year, resulting in a year to date free cash flow to net income conversion ratio of 146%. During the quarter, we deployed approximately $2 billion of capital towards the repurchase of 10 million shares of Danaher common stock. Additionally, our Board of Directors approved a new share repurchase program authorizing the purchase of up to 35 million additional shares of Danaher common stock. Our substantial investments in innovation over the last several years led to the launch of several leading edge products and technologies this quarter. Each one of these new solutions is designed to enhance our competitive positioning while enabling customers to improve quality and yield, lower costs, and accelerate the delivery of life changing therapies and diagnostics.
Let me highlight a few examples and the tangible value they're creating for our customers. In biotechnology, Cytiva launched the ÄKTA readyflux TFF system 500, a fully automated benchtop tangential flow filtration system developed to meet growing demand for efficient low volume processing. The readyflux TFF system 500 minimizes product loss, improves yield, and enables effective process development with limited material. Importantly, the readyflux platform is now scalable from process development to commercial production, enabling customers to quickly and smoothly transition across different stages of drug development. This system is one of several planned launches, including the new TFF filter cartridges and our next generation perfusion system. Together with our new Xccelerex platform, bioreactors, and differentiated filtration and cell culture media offerings, these solutions provide a powerful upstream package that helps customers improve yields and efficiency in the intensified biologic drug manufacturing process.
It also underscores the breadth and the depth of Cytiva's leading portfolio and our ability to support customers across the bioprocessing workflow from early stage process development through to commercial manufacturing. In life sciences, IDT announced a strategic expansion of its end to end translational gene editing portfolio with the launch of high purity customizable guide RNAs. As scientists move from early research towards clinical applications, the need for greater purity and flexibility in CRISPR tools increases. These new guide RNAs, key components that direct CRISPR systems to specific genes, give researchers more control over sequence design, lengths, and modifications to meet their precise needs. These capabilities are especially valuable for scientists in preclinical testing who require high quality materials for studies like toxicology ahead of clinical trials. In diagnostics, Beckman Coulter launched the Access BD-Tau assay.
This is the industry's first fully automated research use only immunoassay for brain derived tau protein, a promising blood based biomarker for researching neurodegenerative diseases such as Alzheimer's. This assay leverages the high resolution DxI 9000 analyzer to bring automation and scalability to tau protein quantification. Ultimately, this powerful technology combination can help improve research efficiency, enhance consistency in long term clinical trials, and support accelerated regulatory pathways through stronger real world evidence. Now let's take a closer look at our results across the portfolio and give you some color on what we're seeing in our end markets today. Core revenue in our biotechnology segment increased 6.5%. Core revenue in discovery and medical grew low single digits in the quarter. Growth in medical and lab filtration was partially offset by declines in protein research instrumentation, where academic research customers continue to face funding constraints.
Core revenue in bioprocessing grew high single digits with double digit growth in consumables partially offset by declines in equipment. Consumables growth was driven by robust demand for commercialized therapies at our large pharma and CDMO customers. Equipment revenue grew sequentially but declined in the high teens versus prior year as expected. Now, while we're seeing strong funnels and customers have a healthy pipeline of planned projects, this hasn't translated into equipment order growth as customers are awaiting additional clarity on the policy environment before finalizing their investment decisions. Based on what we're seeing today, we expect cautious equipment spending through the remainder of the year.
That said, with several billions of dollars invested to expand capacity at Cytiva since 2020, including meaningful additions at our facilities in Florida, South Carolina, Utah, and Michigan, we believe we are very well positioned to help customers execute in region for region manufacturing strategies. The long term outlook for the biologics market remains very healthy. The primary growth driver of Cytiva's bioprocessing business is the increasing global production of biological medicines, particularly monoclonal antibodies. Underlying biologic demand has grown double digits annually over the last 10+ years and we expect strong demand growth to continue in 2025 and beyond. This growth has been supported by a steady pace of new FDA drug approvals, building on several consecutive years with record setting FDA approvals, as well as a continued shift in pharmaceutical pipelines towards biologics.
In fact, more than 2/3 of the world's top 100 drugs are projected to be biologics by 2030. At the same time, we've seen increased development of biosimilars and expanded indications for existing therapies, both of which are expected to drive production volume growth. The substantial and sustained level of activity we have seen reinforces our conviction in the significant opportunity ahead in this market and supports the long term core revenue growth trajectory for our leading bioprocessing franchise. Now turning to our life sciences segment, core revenue decreased by 1%. Core revenue in our life sciences instrument businesses was up slightly in the quarter. By end market, clinical and applied markets held up well globally.
Demand from academic and government customers remained soft but was stable sequentially, and as I mentioned earlier, we continued to see modest recovery in pharma spending with revenue from these customers growing in the quarter. In China, moderate improvements in the funding environment led to increased activity levels, which contributed to revenue growth in the quarter. Core revenue in our life sciences consumables businesses, which include IDT, Aldevron, Abcam, and Phenomenex, declined in the quarter primarily due to lower demand for plasmids and mRNA from two of our larger customers as well as continued funding pressure across early stage biotech and academic research. Declines related to these funding pressures were partially offset by growth in next generation sequencing products at IDT and recombinant proteins at Abcam. Moving to our diagnostics segment, core revenue increased 3.5%.
Core revenue in our clinical diagnostics businesses was up low single digits with high single digit growth outside of China. Leica Biosystems delivered over 10% core growth with broad-based strength across core histology, advanced staining, and digital pathology. Beckman Coulter Diagnostics also had another solid quarter with mid single digit growth outside of China. This marks Beckman's fifth consecutive quarter of mid single digit or better core growth outside of China, driven by continued uptake of recent innovations such as the DxI 9000 and strong momentum in commercial execution. In molecular diagnostics, Cepheid's core revenue was up mid single digits in the quarter. High single digit growth across Cepheid's core non-respiratory test menu was led by approximately 20% growth in sexual health. Respiratory revenue exceeded expectations as customers began purchasing earlier than typical in preparation for the upcoming respiratory season.
Thank you, Rainer. Operator, that concludes our formal comments. We're now ready for questions.