In March 2020, Bret Wiener’s firm announced a detail that deserves a little space beside the dollar sign. Every institutional investor in Gemspring Capital’s first fund had committed to its second. The new fund held $750 million in commitments. For a founder who had opened his own investment firm five years earlier, the returning names were a particular kind of milestone: people who had already placed a bet were willing to place another.
Private equity tends to introduce itself with numbers. They are compact, impressive on a screen, and rarely ask the reader to linger. But Wiener’s career becomes more interesting when you follow the relationships tucked between those numbers. A colleague known for twelve years. An adviser who became an operating leader. A fundraising specialist who joined the business he had helped finance. Eventually, two investors entrusted with broader leadership of the firm.
By February 2026, Gemspring reported $5.1 billion of capital under management. Wiener remained its founder and chief executive. The firm had appointed Aron Grossman and Zubin Malkani as co-heads of investments, giving them wider responsibility across its investing platform. The founder’s job now included building an organization that could give other people more room to lead. That is a different assignment from getting a first fund off the ground.
Before his name was on the firm
Wiener’s route to Westport passed through several recognizable institutions. He earned a bachelor of science from New York University, graduating summa cum laude, and an MBA from Stanford. His work included investment banking at Donaldson, Lufkin & Jenrette, corporate strategy at Microsoft, and a managing director role at H.I.G. Capital. Banking, technology strategy, and private equity gave him three different places from which to examine a business.
His early jobs supplied a less polished set of titles: institutional cook, New York City messenger, and telemarketing representative. They sit comfortably beside the degrees, if rather less comfortably on a conference badge. These were jobs with immediate tasks and people waiting for something to happen. It is tempting to turn every delivery or telephone call into a founding revelation. The jobs are interesting enough on their own.
He spent eleven years at H.I.G., seven as a managing director, and was a founding managing director of its Middle Market Fund. His responsibilities included leading the business services investment effort. Wiener arrived at his own venture with experience across sourcing, diligence, financing, and work after an acquisition. Starting Gemspring meant putting that experience behind a firm he had founded himself.
A first fund, and an old acquaintance
Gemspring began in 2015. In August 2016, Thomas Zanios joined as a managing director after nine years at Odyssey Investment Partners. Wiener’s welcome contained a small piece of personal history: “I have known Thomas for 12 years.” The appointment brought back a professional connection that reached well before Gemspring had a name, a fund, or a portfolio of its own.
The first fundraising formally launched that August. On November 4, Gemspring announced a final close at $350 million, reaching its hard cap in less than three months. Its backers included endowments, foundations, family offices, pension plans, and funds of funds. Acalyx Advisors handled the placement work. The firm was young; the people presenting it to investors brought careers and references with them.
Wiener put the ambition plainly: “help transform businesses to achieve their full potential.” The initial remit covered control and structured equity investments in companies headquartered in the United States and Canada, with target businesses generating up to $250 million in revenue. That placed Gemspring among established businesses with room to develop. The work would continue after the signatures, when financial plans encountered actual customers and operating costs.
A larger pool, each time
The people behind the extra zeroes
A fund can grow faster than the organization responsible for it. Wiener’s hiring record shows a repeated effort to add particular capabilities. In 2018, Gemspring appointed retired General Wesley K. Clark as a senior adviser. The former NATO Supreme Allied Commander, Europe, had also worked as an investment banker, investor, author, and educator. The appointment brought a different professional perspective into a financial firm.
In 2019, Charlie Fraas joined the portfolio operations team. Wiener had already worked with him as an executive adviser for three years. Fraas’s background included serving as chief operating officer of 1800flowers.com and work on supply chains, procurement, technology implementation, and post-merger integration. Those are subjects that become pressing when a newly acquired company must change how it operates without losing the ability to serve its customers.
The 2020 hires were similarly specific. Michael Fan added software investing experience. Brad Liff brought expertise in structured investments and opportunistic credit. Jack Tucker joined as chief operating officer after working at Acalyx on Gemspring’s first two fundraises. In Tucker’s case, someone who had helped bring investors into the firm came inside the firm himself. The relationship acquired a new job description.
Wiener also developed people already there. Alex Shakibnia, who joined at the founding in 2015, became a managing director in 2021. Ravdeep Chanana, a former General Electric executive who arrived in 2017, received the same promotion in 2022. These appointments make the growth story more concrete: the growing sums came with changes in who could make decisions and carry the work forward.
“help transform businesses to achieve their full potential.”
Bret Wiener · November 2016
Two ways to sit at the same table
The third buyout fund arrived in January 2023 with $1.7 billion in commitments. Alongside it, Gemspring announced a $400 million Growth Solutions fund that had closed in 2022. Together, the two represented $2.1 billion of capital commitments. The second vehicle added a non-control strategy, allowing the firm to invest without buying control of every business it backed.
The recruitment had begun before the announcement. Jay Reynolds joined in July 2022 following nearly a decade at Riverside, where his work included non-control investments and collaboration with management teams on growth plans. Wiener highlighted Reynolds’s experience partnering with founders. Having a new pool of capital meant having colleagues familiar with the relationships and transaction structures that pool would require.
The distinction matters to a business owner. Selling control and accepting growth capital involve different choices about ownership and authority. By developing both strategies, Wiener’s firm could participate in different moments of a company’s life. The paperwork would vary, and so would the relationship with the existing owners. A growing business does not necessarily arrive with a request to sell itself.
In September 2025, Growth Solutions II closed at $1.1 billion, up from its $400 million predecessor. Gemspring reported reaching the hard cap after approximately three months in the market. Its team made the largest single commitment to the fund. At that point, the firm counted 75 professionals and 128 completed acquisitions across its strategies. Wiener’s venture had become an organization with several kinds of investment work underway.
Buyout
Capital to acquire control of a business.
Growth Solutions
Non-control and growth capital investments.
When the story leaves Connecticut
To see where all this lands, leave the fund announcements for the operating businesses. Gemspring acquired chemicals distributor Shrieve in December 2019. By October 2024, Shrieve had completed five strategic add-on acquisitions during Gemspring’s ownership, expanded its product offering, and entered additional markets. The work included strengthening its salesforce and product management capabilities. Growth had a practical vocabulary: people, products, and places.
That October, a single-asset continuation vehicle acquired interests in Shrieve in a transaction led by StepStone. A concurrent debt refinancing and the new vehicle provided follow-on capital for further growth and acquisitions. Gemspring and the management team also invested. The arrangement extended the partnership, giving the business additional capital rather than bringing its relationship with Gemspring to a conventional end.
Another transaction took the firm into synthetic rubber. A Gemspring affiliate completed the acquisition of Goodyear’s polymer chemicals business in 2025. The assets included manufacturing plants in Houston and Beaumont, Texas, and a research and development facility in Akron, Ohio. Goodyear kept its chemical facilities in Niagara Falls, New York, and Bayport, Texas. This was a defined separation of part of a larger company.
The purchase price was $650 million, subject to adjustments, with the sale effective October 31. Silver Point’s direct lending business served as a joint lead arranger on $450 million of secured term loan financing supporting the acquisition. These are separate figures for separate things. Behind them sit plants that make materials used by other manufacturers, a considerable distance from the quiet precision of a fundraising announcement.
A founder makes room
The February 2026 appointments bring the story back to Wiener. Grossman had joined Gemspring in 2017; Malkani arrived in 2022. As co-heads of investments, both would continue sourcing, executing, and overseeing investments while taking on broader leadership responsibilities. Their appointment connected the firm’s next stage to people with different lengths of service inside it.
Wiener’s description of what he wanted to preserve included the “entrepreneurial culture and investor-first mindset that define Gemspring.” That aspiration has a practical tension built into it. A firm with more capital and more colleagues needs clear responsibilities. It also wants people to exercise judgment. The appointments gave two investors a larger role in managing that balance while Wiener continued as chief executive.
The two new co-heads, in their joint statement, emphasized ownership, collaboration, and execution. Read alongside the earlier appointments, their expanded roles look like another step in the construction of the firm. The founder hires people for specific work, watches some of those roles develop, and gives colleagues additional authority as the organization becomes larger.
Wiener still sits on Gemspring’s investment committee. He has been involved in more than 200 acquisitions across his career, a figure that spans his professional life rather than Gemspring alone. Yet the most revealing number in this story may remain the one implicit in that March 2020 announcement: a second commitment. Building the firm meant persuading people to join him. Growing it meant giving them reasons to stay.