Anthony Hunt
Analyst · Stifel
Thank you, Sondra, and good morning, everyone, and welcome to our Q2 earnings call. We're very pleased with our performance in the second quarter and through the first half of 2021.
Our reported organic revenue growth of 69% year-over-year along with significant margin expansion reflects the outstanding efforts by our entire team as we focus on capacity expansion and capital project programs to meet accelerating demand, on fast tracking the hiring of more than 300 people, completing the next phase implementation of SAP while delivering critical products to our expanding customer base.
We also executed on our M&A strategy, adding an important player in hollow fiber technology to our fast growing filtration franchise. As noted in prior quarters, we continue to see very positive performance in our non-COVID base business, which was up 35%, accounting for 66% of revenue and 31 points of total growth. We had another strong COVID quarter, which represented 27% of our revenue or 42 points of our total growth. Finally, revenue from acquisitions we made in 2020, namely ARTeSYN, EMT and NMS, represented 7% of our revenue and 13 points of growth. We continue to be encouraged by the sustained strength in our non-COVID business where all our franchise continued to perform above our expectations, led by our filtration franchise, which was more than doubled through the first 6 months of 2021.
On the orders front, we continue to see strong momentum with orders up approximately 140% in the first half of this year compared to 2020, as customers continue to fill out the order book for the second half of 2021 and first half of 2022. In the quarter, COVID orders represented 28% of the order book. Given the strength in orders and overall first half revenue performance, we now expect 2021 to finish between $625 million and $645 million, with COVID revenue coming in between $170 million and $180 million. Our base business growth should be north of 30%, reflecting the strong adoption of our core technologies in bioprocessing.
Looking into 2022, we have increasing visibility into demand from COVID accounts with orders currently being placed for next year. While there are still more accounts have yet to place orders, our COVID order book has filled up to greater than $100 million over the last few months, and we expect that COVID revenues in 2022 will be approximately $200 million.
Before jumping into the quarterly results, I want to provide some commentary on our acquisition of Polymem, an update on the performance of EMT, NMS and ARTeSYN and a progress report on our capacity expansion plans. As announced on the 1st of July, we closed on the acquisition of Polymem, an expert in hollow fiber manufacturing spanning industrial and bioprocessing markets. This is a very important acquisition for us as it provides us with 3 main benefits: one, a meaningful and immediate 2- to 3-fold increase in overall hollow fiber membrane and module capacity; two, an innovator in membrane development with strong synergies in bioprocessing applications; and finally, three, an incredibly talented team with a strong cultural alignment with Repligen. We have worked with the team at Polymem over the last year, and they are now producing hollow fiber modules for our bioprocessing customer base as we ramp up our overall manufacturing production for our filtration products.
Looking to the future and overall integration objectives, our goals are to continue to support Polymem's industrial customer base through increased capacity and broader commercial reach, to accelerate R&D pipeline with a focus on innovation in membranes and modules and to expand their manufacturing footprint to support bioprocessing demand. We expect their industrial business will grow in the range of 15% annually and the bioprocess business will roll into our filtration franchise supported by our commercial channel.
With respect to EMT, NMS and ARTeSYN, we're extremely pleased with overall performance in the first half of 2021 as our commercial organization has moved quickly to integrate these products into our systems and fluid management portfolio. The performance reflects the strong fit with our overall bioprocessing business and the speed of integration into Repligen, which has gone well. We expect that these businesses will be at or above the high end of our $43 million to $46 million guidance range by the end of the year. We also expect Polymem to contribute $3 million to the second half of 2021.
As noted in May, our #1 priority continues to be building out capacity to support accelerating demand across all of our businesses. Our operations team continues to do an outstanding job, and this is clearly reflected in the margin performance in Q2 as we have systematically added capacity for OPUS prepacked columns, hollow fibers, flat sheet cassettes and systems. To support our long-term growth targets and ensure that we have ample production capacity, we recently signed a lease for a 64,000 square foot facility in Hopkinton, Mass, and we are set to build out a 33,000 square foot lead, silver certified building in Waterford, Ireland, that was developed by the Irish Industrial Development Agency and is very close to our ARTeSYN headquarters. Both the Hopkinton and Waterford sites will become centers of excellence for assembly, which include ProConnex flow paths for our systems.
In addition, the Hopkinton plant will support our expansion plans for affinity ligand product line that is already set up to support E. coli manufacturing. We are making quick progress and expect both facilities to come online in 2022. Coupled with our ongoing 67,000 square foot expansion in Marlborough, we will be well positioned to support our growth for the next 5 years.
So moving now to our quarterly performance. The story of the quarter was a 35% non-COVID-based business growth and the continued strength of COVID accounts. Order loads, as noted earlier, was exceptionally strong with our non-COVID accounts contributing greater than 70% of this overall demand. In filtration, our business more than doubled in Q2 and through the first 6 months of 2021. The strength in filtration was broad-based. Our ATF business doubled in the quarter with Asia now representing more than 30% of these sales. We saw strong demand for our single-use ATF devices in COVID applications as well as in gene therapy, where ATF is fast becoming the standard for viral vector intensification.
In our flat sheet cassette business, our non-COVID account revenue was up over 60%, reflecting best-in-class lead times as we have rapidly built out our capacity here in 2021. Our hollow fiber business on the system side was up approximately 100%, driven by the strong demand for our bench-top hollow fiber systems. Finally, we were able to add in some new vaccine and diagnostic wins, which will help bolster revenues in the second half of this year and in 2022. For the full year, we continue to expect our filtration business to double.
Moving to chromatography. Our OPUS prepacked column business had an excellent quarter driven by gene therapy and COVID customers who continue to implement prepacked columns into their manufacturing process. As our customer base continues to adopt and implement OPUS, we are delighted that our Breda facility is now online and ready to package of columns here in Q3. This will give our European customer base a local manufacturing hub and will make it much easier for these customers to ship chromatography resins to Repligen for column packing. For the year, we anticipate that the chromatography franchise will grow in the range of 35% to 45%.
Our OEM proteins business had another strong quarter as we have seen an uptick in demand for both our Protein A ligands and growth factors. With a strong order book in Q3 and continued strength forecasted through to the end of the year, we now expect proteins to grow north of 30% this year.
Finally, our process analytics business continues to accelerate as customers adopt SoloVPE of new accounts and FlowVPE into Process Analytics Technologies, or PAT applications. For the quarter, the business was up greater than 40%, very similar to our results in Q1 with new accounts, again, accounting for almost 50% of the systems sold. Our FlowVPX system was officially launched in the quarter, and we are seeing high interest and strong adoption of this technology in applications ranging from chromatography to fill finish as customers look to get accurate real-time protein concentration data on the manufacturing floor for their target drugs. We expect that the first half momentum will carry over into the second half, and we now anticipate growth in the range of 30% to 35% for the year.
So overall, we had another outstanding quarter in Q2 where we had really good balance between our COVID and non-COVID accounts and strong execution operationally, which drove the significant margin beat. We are especially encouraged by our base business growth, which we anticipate will be north of 30% this year. With additional capacity coming online, new products continuing to hit the market, excellent performance by our recent M&As, the future is bright. And we continue to execute on our long-term growth targets, which we are now revising with the goal of surpassing $1 billion in revenue in 2024. We look forward to updating you on our progress through the year.
And with that, I'll turn the call over to Jon for the financial update.