Marcin Macieszczak
Managing Partner
Attorney-at-law
Marcin Macieszczak heads GESSEL’s Mergers and acquisitions (M&A) and Private Equity practices. He has led transaction teams in more than 100 M&A and private equity transactions, advising both sell-side and buy-side clients in some of the most complex investment and capital market processes. He advises clients on key ownership and investment decisions, combining extensive legal expertise with a deep understanding of business realities and market expectations.
Languages:
BIO
Marcin Macieszczak is an attorney-at-law, Managing Partner, and heads the Mergers and acquisitions (M&) and Private Equity practices at GESSEL law firm. He has over twenty-five years of experience in legal advisory and capital markets transactions. Marcin leads legal teams in two of the firm’s core practice areas, advising domestic and international clients across a broad range of industries, including private equity and venture capital funds, listed companies, strategic investors, as well as entrepreneurs and founders seeking investment for their businesses.
He specializes in complex public and private market transactions, particularly equity investments by financial investors, buy-outs, growth financing transactions, and exit processes, including IPOs. His practice also covers the structuring and execution of leveraged buyouts (LBOs), management buyouts (MBOs), management buy-ins (MBIs), and joint venture transactions. He has led key transactional projects for clients in the healthcare, technology, industrial, and professional services sectors, as well as cross-border transactions requiring sophisticated legal coordination across multiple jurisdictions.
Throughout his practice, he has led transaction teams in more than 100 M&A and Private Equity transactions, representing both sellers and buyers and regularly advising clients in the most complex investment and capital market processes.
He graduated in law from the University of Warsaw in 2000. He was admitted to the list of attorneys-at-law in 2005. He has been a Partner at GESSEL since 2007 and Managing Partner since 2017. He is fluent in English.
Experience
Selected experiance
- Advised the founders of Clicktrans, a leading European online transport platform, on the sale of a 70% stake to private equity fund Spire Capital Partners, with the founders retaining significant minority stakes
- Advised Enterprise Investors and the remaining shareholders on the sale of 100% of the shares in Anwim S.A., owner of the MOYA fuel station network, to Stonepeak and Energy Equation Partners
- Advised CenterMed on the acquisition of NZOZ Partner, a healthcare provider operating three medical facilities in Kielce offering primary healthcare, outpatient specialist care and rehabilitation services
- Advised LUX MED on the acquisition of 100% of the shares in TMS Diagnostyka, a medical imaging company
- Advised CenterMed on the acquisition of the Avimed Group, a healthcare provider operating in the Silesia region
- Advised the selling shareholders on the disposal of six Centrum Diagnostyczno-Lecznicze Barska medical facilities to the Unity Care network, backed by the private equity fund Enterprise Investors
- Advised LUX MED on the acquisition of the Mental Path network of seven mental health centres operating in five cities across Poland
- Advised CenterMed on the acquisition of 100% of the shares in CenterMed Poznań, a multi-specialty medical centre
- Advised BeBio sp. z o.o. on the acquisition from Fitatu sp. z o.o. of online diet planning services, including Vitalia and Ketoonline, in the form of an organised part of the business
- Advised the ArKa family foundation on the sale of a 75% stake in Centrum Medyczne Med-Gastr, a gastroenterology clinic, to private equity fund Tar Heel Capital
- Acquisition of an 80% stake in Expobud Domy by Enterprise Investors
- Advised Szopex sp. z o.o., an operator of sports retail stores and e-commerce platforms, on the sale of a 75% stake to Modivo, part of CCC Group, for PLN 27.8 million
- Advised Maabarot Products Ltd. on the EUR 28 million sale of Laboratoria Natury sp. z o.o., a dietary supplements manufacturer, to Farmaceutici Procemsa S.p.A., a portfolio company of the private equity fund Investindustrial
- Sale of Grupa Scanmed to American Heart of Poland
- Acquisition of shares in the share capital of SELT sp. z o.o. by Grupa Kęty S.A.
- LUX MED‘s investment in the Orthopedicum orthopedic hospital in Krakow.
- The sale of the majority stake in Sescom S.A. to Enterprise Investors for the amount of 104 million PLN.
- Sale of JNT GROUP S.A. SP.K by Polish Enterprise Fund VII (PEF VII), a private equity fund managed by Enterprise Investors
- Fulfilio’s investment in SellerSwitch Ltd.
- Enterprise Investors fund’s investment in Bisar S.A. (Transaction value: PLN 125 million)
- Buyout of shares in Polska Grupa Biogazowa S.A. from PFR and their sale to TotalEnergies Group
- Sale of a majority stake in Suwary S.A., a public company listed on the Warsaw Stock Exchange, to Plast-Box. (Transaction value: approximately PLN 100 million)
- Sale of shares in Zielona-Energia.com Logistics to EDP Energia Polska Group sp. z o.o. (a global leader in renewable energy and PV solutions)
- Anwim S.A.’s investment, a portfolio company of Enterprise Investors, in the Dutch company The Fuel Company Holding B.V.
- Sale of Asist to PIB Group, one of Europe’s largest agency and brokerage market groups
- Sale of Famed Żywiec sp. z o.o. by PE fund EMSA Capital
- Lux Med Group’s investment in Medtour sp. z o.o.
- Lux Med Group’s investment in Swissmed Centrum Zdrowia, a public company listed on the WSE
- Lux Med Group’s investment in HIFU CLINIC urology clinic
- Call for 100% of shares in OEX S.A., a public company listed on the WSE
- Sale of reinsurance broker Smartt Group to brokerage group MJM Holdings
- Acquisition of 100% of Skyrise.Tech shares by Finnish public company Etteplan Oyj
- Sale of JARS S.A. to GBA Group
- Lux Med Group’s purchase of St. Elizabeth’s multispecialty hospital in Warsaw
- Increased involvement of the Enterprise Investors fund in Anwim S.A., operator of MOYA gas stations
- OEX S.A.’s investment in iPOS S.A.
- Investment by Anwim S.A., a portfolio company of the Enterprise Investors fund, in the eMila chain of unmanned gas stations
- Sale of a stake in XTRF Systems S.A. by Experior Venture Fund
- Sale of majority stake in Akomex Group by Highlander Partners fund
- Enterprise Investors fund’s sale of shares in Danwood S.A. to Korean firm GS Engineering & Construction (value of transaction: €140 million)
- Acquisition by Lux Med Group of Niepubliczny Zakład Opieki Zdrowotnej REMEDIUM sp. z o.o. in Nowy Sącz
- Sale of a stake in PayPro S.A. (operator of Przelewy24) to Nets Denmark a.s. (a portfolio company of Hellman & Friedman, Advent International and Bain Capital)
- Acquisition of 100% of Platinum Wines sp. z o.o. by Jantoń, a portfolio company of the Enterprise Investors fund
- Enterprise Investors fund’s sale of 100% of 3S S.A. shares to Play (value of the transaction: PLN 410 million)
- Sale of ArchiDoc S.A. by OEX S.A. to Offsite Archive Storage & Integrated Services (OASIS) (transaction value: PLN 65 million).
- Lux Med Group’s investment in Optimum Head and Neck Clinic
- Polish Biogas Group S.A.’s acquisition of investment from PFR
- Enterprise Investors fund’s investment in a significant minority stake in Anwim S.A., operator of MOYA gas stations
- Sale by Bioton S.A. A 95.6% stake in Australian-listed Singaporean company SciGen to Chinese pharmaceutical company Yifan International Pharmaceutical (deal value: $56.7 billion)
- Lux Med Group’s investment in Swissmed Private Medical Service, a public company listed on NewConnect (transaction value: PLN 14.5 million)
- Leveraged management buyout of Exact Systems S.A with participation of CVI fund
- Sale of majority stake in Velvet Care sp. z o.o. by Avallon fund to Abris Capital Partners fund
- Enterprise Investors fund’s investment in Jantoń
- Enterprise Investors fund’s sale of shares in Harper Hygienics S.A., a public company listed on the WSE, to Latvian firm iCotton SIA
- Sale of shares in companies controlling MILA chain of stores to Eurocash (transaction value: PLN 350 million)
- Sale by the Krokus PE fund of 100% of Comfort S.A. shares to the Goldbeck group
- Highlander Partners fund’s investment in Rotometal
- Sale of a 32.99% stake in Skarbiec Holding, a public company listed on the WSE, by the Enterprise Investors fund
- Sale by the Krokus PE fund of a stake in Catermed S.A. to Naprzód S.A.
- Sale of 100% of Madej Wróbel’s shares to Bruno Tassi
- Lux Med Group’s investment in the Prima-Dent chain of specialist facilities
- Sale of a controlling stake in Novita S.A., a company listed on the WSE, to Tebesa sp. z o.o., a subsidiary of Vaporjet Ltd.
- Sale by the Highlander Partners fund of 100% of the shares of ProService Agent Transferowy sp. z o.o. to funds managed by Oaktree European Principal Group and Cornerstone Partners
- Sale by the Highlander Partners fund of 100% of the shares in ZREW Transformatory S.A. to Rauscher & Stoecklin International Holding
- Sale of 100% of SALMO to FOX International Group Limited
- Sale of 100% of shares in Casus Finanse S.A. to the Lindorff Group
- Lux Med Group’s investment in Magodent (operator of oncology hospitals)
- Lux Med Group’s investment in Medicor Medical Center
- Sale of 100% of OBRAM S.A. shares to TETRA PAK
- Lux Med Group’s investment in the company in Enel-Med diagnostic facilities (transaction value: PLN 52 million)
- Mezzanine Management fund’s investment in Private Equity Managers S.A.
- Acquisition of a 60% stake in food company QFG by Highlander Partners fund
- Sale of Gemini Pharmacy Group shares to Warburg Pincus fund
- Enterprise Investors fund’s investment in 3S S.A. (Transaction value: PLN 86 million)
- The sale by the Enterprise Investors fund of 100% of shares in GAMET S.A. to Stalmot & Wolmet S.A.
- Acquisition of DRUK-PAK by AKOMEX, a company backed by the Highlander Partners fund
- Acquisition of 100% of shares in the Slovenian company Adria Airways Tehnika d.d. by Linetech Holding S.A.
News
& Insights
29.07.2026
GESSEL advised the founders of Clicktrans on the sale of a majority stake to Spire Capital
GESSEL advised Agnieszka Korzeniewska and Michał Brzeziński, the founders of Clicktrans sp. z o.o., one of Europe's largest online marketplaces connecting customers with...
09.07.2026
GESSEL ranked as the most active M&A legal advisor in Poland according to Mergermarket
GESSEL law firm ranked first in Poland by the number of mergers and acquisitions transactions advised, according to the Mergermarket Legal Advisors League Tables for the...
12.06.2026
GESSEL advised Enterprise Investors on the sale of Anwim, owner of the MOYA fuel station network, to Stonepeak and Energy Equation Partners
GESSEL advised a fund managed by Enterprise Investors and the remaining shareholders on the sale of 100% of the shares in Anwim S.A., owner of the MOYA fuel station netw...
20.05.2026
GESSEL advised CenterMed on the acquisition of NZOZ Partner
GESSEL advised CenterMed, a Polish medical group developing a network of healthcare facilities, on the acquisition of NZOZ Partner sp. z o.o., a healthcare services prov...
Education and achievements
Awards
Academic publications
