Every Ann Arbor Tech Exit Over $100M

By A2Hub Editorial. Published 2026-04-22.

Ann Arbor has produced more than $14B in disclosed tech exit value since 2009. This page is the ranked, sourced ledger. Each entry covers founders, founding date, acquirer, deal date, deal size, employee count at exit, and where the talent and capital went after.

If you are tracking the canonical Ann Arbor narrative, the four exits above $2B (ProQuest, Truven, Duo, Arbor Networks) plus the Llamasoft and HistoSonics deals are the load-bearing data points. The rest fill in the texture. For the historical context that ties them together, read the complete history of Ann Arbor tech.

1. ProQuest, sold to Clarivate, 2021. Approximately $5.3B.

Clarivate acquired ProQuest in December 2021 for approximately $5.3B in cash and stock. ProQuest's roots trace back to University Microfilms Inc., founded in Ann Arbor in 1938 by Eugene Power. By acquisition the company had 2,700 global employees, with roughly 550 in Ann Arbor at 789 E. Eisenhower Parkway. Cambridge Information Group had been the majority owner.

What ProQuest does: academic information and research databases, including the dissertation collection that grew out of the original microfilm business, plus the Ex Libris suite of library workflow software and the Bowker book metadata business.

Where the people went: Clarivate retained significant Ann Arbor operations. Many product and engineering managers from the ProQuest era remained through the integration. The company is one of the larger continuing tech employers in town under Clarivate.

2. Truven Health Analytics, sold to IBM Watson Health, 2016. $2.6B.

IBM Watson Health acquired Truven Health Analytics in April 2016 for $2.6B. Truven was headquartered in Ann Arbor, having been spun out from Thomson Reuters in 2012 when Veritas Capital bought it for $1.25B (a 2x return for Veritas in four years). Approximately 2,500 employees at acquisition.

What Truven does: healthcare data and analytics, including the MarketScan claims database used by payers, providers, and pharma, plus Micromedex clinical decision support.

Where the people went: IBM operated Watson Health for six years. In January 2022, IBM sold the Watson Health assets including Truven to Francisco Partners for roughly $1B. The relaunched entity became Merative in June 2022. Truven and now Merative still operate with significant Ann Arbor presence.

3. Duo Security, sold to Cisco, 2018. $2.35B.

Cisco acquired Duo Security for $2.35B in cash, announced August 2, 2018, closed October 2018. Approximately 740 employees at acquisition with 350+ Michigan-based. Founded 2010 in Ann Arbor by Dug Song and Jonathan Oberheide.

The largest pure-play software exit in Ann Arbor history and Michigan's first tech unicorn. Cisco kept the office, which is the canonical reason the post-Duo cybersecurity scene consolidated downtown rather than scattering.

What Duo does: identity and access security. Multi-factor authentication (the Duo Mobile push), device trust, single sign-on, zero-trust access. Now operates as Cisco Duo inside the Cisco security portfolio.

Where the people went: most stayed. Dug Song moved into a Cisco chief strategy officer role, then into civic work co-chairing Michigan Founders Fund and running the Song Foundation. Jonathan Oberheide became an active angel investor including Blumira's Series B and co-hosts the "Inside the Network" podcast. Many Duo alumni populated Censys, Blumira, Workit Health, May Mobility, and downtown SaaS startups.

4. Arbor Networks, into NETSCOUT, 2015. Approximately $2.3B.

Arbor Networks was founded 2000 by Farnam Jahanian and Robert Malan as a U-M / DARPA spinout. Pioneered carrier-grade DDoS protection. Danaher acquired Arbor in 2010, folding it into the Danaher Communications platform. NETSCOUT then acquired Danaher's Communications business including Arbor Networks in July 2015 for approximately $2.3B (announced October 2014 at a $2.6B headline as a stock-and-cash combination).

What Arbor does: DDoS detection and mitigation, carrier-grade. Sightline, APS, and TMS product lines. The Arbor DDoS brand still ships under NETSCOUT.

Where the people went: NETSCOUT retained Arbor's Ann Arbor operations. Dug Song spent seven years at Arbor as chief security architect before co-founding Duo, which is the load-bearing personnel link in the entire Ann Arbor cybersecurity lineage. Farnam Jahanian eventually became NSF CISE director and is now CMU president. The Arbor Networks alumni network is still embedded across Ann Arbor cybersecurity and the broader Michigan security industry.

5. Llamasoft, sold to Coupa, 2020. Approximately $1.5B.

Coupa Software acquired Llamasoft in November 2020 for approximately $1.5B. Llamasoft was the Ann Arbor supply-chain design and optimization platform headquartered at 201 South Division Street, Suite 300. TPG Capital owned the company at the time of sale, with earlier investment from Goldman Sachs and MK Capital. Customers included Boeing, Home Depot, and Nestle.

What Llamasoft did: supply chain network design and optimization. The product line still ships as Coupa Supply Chain Solutions powered by Llamasoft.

Where the people went: Coupa retained Ann Arbor operations. Coupa was itself taken private by Thoma Bravo in 2023 at an $8B enterprise value. Don Hicks, Llamasoft's founder, started Optilogic in 2018 to build a cloud-native successor (Cosmic Frog), backed by Beringea, with customers including GM. Optilogic remains Ann Arbor-based.

6. HistoSonics, recapitalization at $1B+, 2024.

Not an outright acquisition but a unicorn-marking event. HistoSonics, the U-M-founded focused-ultrasound company, completed a majority-stake recapitalization in 2024 led by K5 Global, Bezos Expeditions, and Wellington Management at a valuation north of $1B. HQ in Plymouth, Michigan, with deep U-M and Ann Arbor research roots.

What HistoSonics does: histotripsy, the non-invasive focused-ultrasound tumor ablation platform. The Edison system received FDA De Novo clearance in October 2023 and has now treated more than 2,000 patients across more than 50 U.S. medical centers.

Where the people went: HistoSonics is operating and growing. The recap brought new strategic investors but did not displace the operating team. The company is the most prominent example of Michigan medtech reaching unicorn status in the current cycle.

7. Workit Health Series C at $500M, 2021. $118M raised.

Workit Health raised a $118M Series C in October 2021 led by Insight Partners at a $500M valuation, with participation from CVS Health Ventures, FirstMark, BCBS Venture, and 3L Capital. Founded 2015 by Robin McIntosh and Lisa McLaughlin, both in recovery. HQ at 3300 Washtenaw Avenue.

Not an exit, but a valuation-marking event that puts Workit in the same conversation as the larger acquisition deals on this list. Continues to operate independently.

What Workit does: telehealth addiction treatment, primarily buprenorphine and naltrexone-based programs.

8. NeuMoDx, sold to QIAGEN, 2020. Estimated $250M+ (undisclosed).

QIAGEN acquired NeuMoDx in September 2020. Deal terms were not disclosed publicly but estimates ran north of $250M. NeuMoDx was a U-M spinout in molecular diagnostics, founded by Kalyan Handique and Sundu Brahmasandra after their HandyLab exit. Arboretum Ventures was an investor.

What NeuMoDx did: random-access molecular diagnostic platforms for clinical labs. The platform is still in QIAGEN's portfolio.

Where the people went: QIAGEN retained Ann Arbor operations and the broader molecular diagnostics footprint that traces back through HandyLab.

9. HandyLab, sold to BD, 2009. $275M.

Becton Dickinson acquired HandyLab for $275M with the deal signed October 2009 and closed November 2009. HandyLab was a U-M spinout founded by Kalyan Handique and Sundu Brahmasandra out of U-M Chemical Engineering, with about 60 employees in Pittsfield Township at acquisition.

What HandyLab did: molecular diagnostics, including the MAX system that BD continues to ship under the BD MAX brand.

Where the people went: Handique and Brahmasandra later founded NeuMoDx (sold to QIAGEN 2020). Many BD MAX engineers remain in the broader Ann Arbor diagnostics workforce.

10. Accuri Cytometers, sold to BD, 2011. $205M.

Becton Dickinson acquired Accuri Cytometers for $205M with the agreement signed February 2011 and closed March 2011. Accuri was a U-M spinout founded by Collin Rich and Jennifer Baird, based in Scio Township. The Accuri instruments and team are still part of BD's flow-cytometry portfolio.

What Accuri did: personal flow cytometers, smaller and lower-cost than legacy lab-scale instruments.

11. ForeSee, sold to Verint, 2018. (Earlier sale to Answers Corp 2013 was $213M.)

ForeSee was the customer-experience intelligence pioneer founded in Ann Arbor in 2001. Answers Corp acquired ForeSee in 2013 for $213M (the figure reported by Crain's at the time). Verint Systems then acquired ForeSee from Answers in 2018. The Ann Arbor office was retained for years post-acquisition before eventually being absorbed.

What ForeSee did: customer experience analytics and feedback measurement, with 2,000+ enterprise customers at peak.

Where the people went: ForeSee alumni populate much of the Ann Arbor SaaS scene that emerged in the late 2010s. The Verint Ann Arbor office reduced over time.

12. Quantum Signal AI, sold to Ford, 2019. (Undisclosed.)

Ford acquired Quantum Signal AI in July 2019. Deal terms were not disclosed. Quantum Signal was founded in 1999 by U-M alums in Saline. Flagship product ANVEL for autonomous-vehicle simulation.

What Quantum Signal does: autonomous simulation, mobile robotics, AV algorithms. Operates as a Ford subsidiary in Saline.

Where the people went: stayed at Ford. Quantum Signal is a key node in Ann Arbor mobility.

13. Groundspeed Analytics, sold to Insurance Quantified, 2023. (Undisclosed.)

Insurance Quantified acquired Groundspeed Analytics in June 2023. Groundspeed had raised approximately $32M before the deal. Founded 2015 in Ann Arbor.

What Groundspeed did: commercial property and casualty data ingestion and underwriting, automating extraction of structured data from broker submissions.

Where the people went: Ann Arbor office retained. Former CEO Eric Kobe joined Insurance Quantified leadership.

14. Nutshell, sold to WebFX, 2022. (Undisclosed.)

WebFX acquired Ann Arbor CRM company Nutshell in October 2022. Founded 2009 by Andy Fowler and Guy Suter.

What Nutshell does: CRM and email marketing for small and mid-market businesses.

Where the people went: Ann Arbor team retained, continues active hiring in engineering, product, and customer success.

15. Decision Resources Group, into Clarivate. (Adjacent.)

Clarivate acquired Decision Resources Group from Piramal Enterprises in February 2020 for $950M. DRG had Ann Arbor roots through prior healthcare-analytics acquisitions and overlap with the Truven and ProQuest workforces. Included here as adjacent context, not as a primary Ann Arbor headline exit.

16. Sierra Oncology / ProNAi, relocated. (No clean exit.)

ProNAi Therapeutics had Ann Arbor roots before relocating to Vancouver and rebranding as Sierra Oncology. GSK eventually acquired Sierra Oncology in 2022 for $1.9B. Counted as a partial Ann Arbor lineage exit even though the operating team had relocated by the deal date.

17. Veranex / IMA / Pixie Scientific. (Smaller and historical.)

A handful of smaller Ann Arbor medical-device, life-sciences, and specialty SaaS exits sit in the $50M-$200M range and are excluded from this $100M-and-above list either because they fall below threshold or because deal terms are not disclosed.

What the exit ledger tells us

Three structural patterns show up in the data.

Pattern 1: U-M is the prime mover. Of the nine exits with disclosed values above $200M, all but ProQuest (founded 1938) trace founding-team lineage back to U-M faculty or research. Arbor Networks (Jahanian and Malan), Duo (Song through Arbor Networks, Oberheide directly), HandyLab and NeuMoDx (Handique and Brahmasandra), Accuri (Rich), HistoSonics, and Llamasoft all started inside or adjacent to the university.

Pattern 2: The acquirers are diverse. Cisco (security). IBM and Clarivate (data and information services). NETSCOUT (network monitoring). BD and QIAGEN (life sciences). Ford (mobility). Coupa (enterprise SaaS). The Ann Arbor exit pattern is "many strategic acquirers in different verticals" rather than "one consolidator dominating the city." That diversification is a feature for the ecosystem.

Pattern 3: Most acquirers keep the office. Cisco kept Duo. IBM (and then Merative) kept Truven. Clarivate kept ProQuest. Coupa kept Llamasoft. NETSCOUT kept Arbor Networks. Ford kept Quantum Signal. WebFX kept Nutshell. Insurance Quantified kept Groundspeed. The pattern of "acquirer guts the regional office" that scarred Detroit and Cleveland in earlier cycles has not been the Ann Arbor story. The talent stayed in town and recycled into the next generation.

For what is coming next, see the 2026 Ann Arbor tech outlook and the Ann Arbor startup scene in 2026.

FAQ

What is the largest Ann Arbor tech exit ever? By disclosed enterprise value, Clarivate's December 2021 acquisition of ProQuest at approximately $5.3B is the largest Ann Arbor tech exit. By cash deal size in a pure software acquisition, Cisco's October 2018 acquisition of Duo Security at $2.35B is the second-largest and the largest pure-play software deal.

How much disclosed exit value has Ann Arbor produced? At least $14B in disclosed value across the deals listed on this page, plus several billion more in undisclosed transaction value (NeuMoDx, Quantum Signal, Groundspeed, Nutshell, and partial-credit lineage cases). The actual aggregate is meaningfully higher than $14B once those undisclosed deals are estimated.

Which Ann Arbor exits stayed in town after acquisition? Most of them. Cisco kept Duo's downtown Ann Arbor office. IBM and then Merative kept Truven. Clarivate kept ProQuest. Coupa kept Llamasoft. NETSCOUT kept Arbor Networks. Ford kept Quantum Signal AI in Saline. WebFX kept Nutshell. Insurance Quantified kept Groundspeed. The Ann Arbor pattern is unusual in that acquirers have largely retained the regional workforce.

What was the first major Ann Arbor tech exit? Comshare's 1968 IPO is arguably the first. By acquisition, the modern era starts with BD acquiring HandyLab for $275M in November 2009, followed by Danaher acquiring Arbor Networks in 2010, BD acquiring Accuri for $205M in March 2011, and the cascade of larger exits from 2015 forward.

What happened to the Truven Health Analytics team? IBM acquired Truven for $2.6B in April 2016 and operated it inside Watson Health for six years. In January 2022, IBM sold Watson Health (including Truven) to Francisco Partners for roughly $1B. The relaunched entity became Merative in June 2022 and continues to operate with a significant Ann Arbor presence.

Did the Duo Security founders stay in Ann Arbor? Yes. Dug Song moved into a Cisco chief strategy officer role after the acquisition, then pivoted into civic work co-chairing Michigan Founders Fund (launched December 2021) and running the Song Foundation with his wife Linh Song. Jonathan Oberheide became an active angel investor including a participating role in Blumira's 2023 Series B and co-hosts the "Inside the Network" cybersecurity podcast. Both remain Ann Arbor-based.