Ad Tech Private Equity: Top Firms, Deals & Investment Trends in 2026

Key Facts

• 368 active PE and venture capital funds invest in advertising and marketing technology as of January 2026, with a separate count of 174 advertising-focused PE funds tracked on institutional deal platforms.
• Deal sizes in this niche range from $65 million (Perion's acquisition of Greenbids) to $1.9 billion (Novacap's take-private of Integral Ad Science in 2025).
• New York anchors mega-fund and agency M&A activity; San Francisco leads tech-focused growth equity; London drives European cross-border deal flow.
• PE and financial buyers accounted for 29% of scaled ad tech transactions in Q1-Q3 2025, with strategic buyers taking the remaining 71%, reflecting heightened competition from corporate acquirers.
• Scaled ad tech M&A volume surged 150% in Q3 2024, signaling a sustained recovery after the 2022-2023 deal drought.
• Connected TV, retail media networks, identity resolution, and AI-powered ad optimization are attracting the largest share of new capital in 2025-2026.
• PE firms deploy seven distinct strategies in this space: leveraged buyouts, take-privates, growth equity, minority stakes, agency roll-ups, venture capital, and consortium deals.

The AdTech PE Landscape: Market Context and Geography

Ad tech private equity has moved well beyond early-stage venture bets to encompass large-scale buyouts, take-privates of publicly traded measurement platforms, and structured agency roll-ups. PE accounted for 38% of all media and marketing mergers and acquisitions in 2023, and deal activity recovered sharply in 2024-2025 after two sluggish years. The market spans a wide range of subsectors: programmatic advertising platforms, connected TV (CTV) infrastructure, digital out-of-home (DOOH) networks, media measurement tools, identity resolution providers, customer data platforms (CDPs), and ad agency networks.

Each subsector carries a different risk and return profile, attracting different types of investors. Measurement and brand safety platforms, with their software-as-a-service (SaaS) revenue models and sticky enterprise contracts, attract leveraged buyout (LBO) structures. CTV and retail media attract growth equity and minority stake investments. Agency networks draw buy-and-build roll-up strategies from mid-market PE firms.

New York leads in mega-fund activity and agency acquisitions, with KKR and Blackstone originating deals from their Manhattan headquarters. San Francisco and Silicon Valley concentrate growth equity and venture capital targeting programmatic and AI-driven ad tech startups. London-based Vitruvian Partners closed the sector's largest cross-border deal of 2025, acquiring a $637 million majority stake in U.S. healthcare demand-side platform (DSP) DeepIntent. Austin is home to Vista Equity Partners, and Chicago hosts GTCR, both active in software-driven ad tech investments.

Ad Tech PE Firms: Comparison

The firms below represent the most active PE investors in advertising technology, based on verified deal activity. AUM data is publicly unavailable for most firms at the subsector level; the table is sorted alphabetically.

Firm	Strategy	Sector Strength	Best Known For	HQ
Aperiam Ventures	Venture Capital	Programmatic, CTV, Identity	Pure-play adtech/martech VC	—
Ares Management	Growth Equity	Ad tech workflow, TV advertising	XR platform investment	—
Blackstone	Buyout	OOH advertising, media	One Times Square billboard play	New York
The Carlyle Group	Buyout / Growth Equity	Digital marketing, TMT	$222B diversified portfolio	Washington, D.C.
GTCR	Buyout / Growth Equity	Programmatic platforms, TMT	Simpli.fi investment	Chicago
H.I.G. Capital	Buyout	Media measurement	Kantar Media acquisition	—
KKR	LBO / Growth Equity	Media, strategic communications	FGS Global stake	New York
MidOcean Partners	Buyout	DOOH advertising	GSTV acquisition ($500M-$600M)	—
Novacap	Take-Private	Ad tech measurement platforms	IAS take-private ($1.9B)	—
Silver Lake	LBO / Consortium	Technology, digital media	TikTok US consortium deal	San Mateo, CA
Truelink Capital	Buyout	Digital agencies	R/GA buyout from IPG	—
Vitruvian Partners	Growth Equity / Majority Stake	Healthcare DSP, ad tech	DeepIntent deal ($637M)	London
Vista Equity Partners	LBO / Operational improvement	Enterprise software, martech	Marketo 2.6x return	Austin, TX

The table reflects a meaningful divide between mega-fund generalists (KKR, Blackstone, Carlyle, Silver Lake) that enter ad tech opportunistically and dedicated operators (Vista, GTCR, Vitruvian) with deeper sector conviction. Specialist firms like Aperiam Ventures occupy the venture end of the spectrum, investing at seed through growth stage in pure-play adtech and martech companies.

Top Picks by Investment Strategy

Largest Take-Private (2025): Novacap — the Canadian firm's $1.9 billion acquisition of Integral Ad Science is the largest PE-led ad tech transaction of the year and demonstrates the continuing appeal of mature, publicly-listed measurement platforms as buyout targets.

Growth Equity Leader: Vitruvian Partners — its $637 million majority stake in DeepIntent combines healthcare vertical expertise with CTV infrastructure, making it the standout growth equity bet of the year in a fast-growing subsector.

Top Operator Model: Vista Equity Partners — Vista's acquisition of Marketo for $1.8 billion in 2016 and its sale to Adobe for $4.75 billion in 2018 remains the defining proof of operational value creation in marketing technology, generating more than a 2.6x return in under two years.

Most Active in DOOH: MidOcean Partners — the $500-600 million GSTV acquisition in April 2025 gives MidOcean control of one of the largest point-of-purchase digital OOH networks, reaching consumers at the gas pump across the United States.

Strongest Agency Roll-Up: Keystone Capital — its 2024 merger of Barkley and OKRP into BarkleyOKRP created a 650-person independent agency serving clients including Burger King and AMC, demonstrating effective buy-and-build execution at the agency layer.

Consortium Deal of the Year: Silver Lake — as part of the Oracle/Silver Lake/MGX consortium acquiring a collective 45% stake in TikTok's U.S. operations in December 2025, Silver Lake positioned itself at the center of the most consequential platform deal in ad tech history.

Best Pure-Play VC: Aperiam Ventures — the only fund on this list that invests exclusively in adtech and martech startups, covering programmatic, identity resolution, CTV, and martech tools from seed through growth stage.

Top 10 Ad Tech PE Firms in Detail

Novacap: The Take-Private Specialist

The defining ad tech deal of 2025 belonged to Novacap. The Canadian investment firm's $1.9 billion acquisition of Integral Ad Science (IAS), announced in September and closed in December 2025, stands as the largest PE-led take-private in ad tech measurement history. IAS had already completed one full PE cycle, having been acquired by Vista Equity Partners in 2018 before listing on Nasdaq in June 2021. Novacap's investment thesis centers on acquiring undervalued public platforms, restructuring them away from quarterly earnings pressure, and repositioning for a future exit. The IAS deal illustrates how measurement and brand safety platforms, with their recurring SaaS revenue and sticky enterprise contracts, attract premium valuations even in a higher interest rate environment. For general partners (GPs) seeking precedent in ad tech take-privates, the IAS cycle is the clearest available benchmark.

Vista Equity Partners: The Returns Leader

No PE firm has produced more documented value creation in marketing technology than Vista Equity Partners. The Austin-based firm's 2016 acquisition of Marketo for $1.8 billion and its 2018 sale to Adobe for $4.75 billion delivered more than a 2.6x return in under two years, using operational playbooks to standardize processes, accelerate sales cycles, and sharpen product roadmaps. Vista applies the same structured approach across every portfolio company, deploying operating partners who implement consistent go-to-market and engineering practices across its software holdings. Software founders considering PE should evaluate Vista's model carefully: the firm offers a well-defined operational improvement thesis, which suits scaling SaaS platforms better than early-stage or founder-run agencies. Vista's prior acquisition and successful IPO of IAS in 2021 further demonstrates its capacity for full-cycle value creation in ad tech measurement.

Vitruvian Partners: The Sector Specialist

London-based Vitruvian Partners built its reputation on growth equity investments in European technology, and its September 2025 acquisition of a $637 million majority stake in DeepIntent extends that reputation decisively into U.S. ad tech. DeepIntent is a healthcare-focused DSP that uses clinical and behavioral data to target patients and caregivers, a subsector where privacy-compliant identity resolution commands a significant premium. Vitruvian's cross-border conviction, backing a U.S.-listed healthcare ad tech platform from London, reflects both its technology sector depth and its willingness to pursue specialty verticals that generalist fund managers overlook. Healthcare founders building at the intersection of health data and programmatic advertising will find few better-positioned investors with this combination of growth equity structure and vertical expertise.

MidOcean Partners: The Consolidator

MidOcean Partners positioned itself as the dominant DOOH consolidator in 2025 with its $500 million to $600 million acquisition of GSTV in April. GSTV operates digital screens at gas stations across the United States, reaching consumers at a high-dwell, high-purchase-intent moment. The firm's investment thesis combines captive audience access with programmatic enablement, a DOOH model that benefits from first-party location and transaction data without relying on third-party cookies. For PE investors evaluating physical-to-digital advertising infrastructure, MidOcean's GSTV acquisition represents the clearest bet in out-of-home media at the start of 2026. GSTV's point-of-purchase proximity to retail also positions it favorably in the retail media network expansion trend.

Silver Lake: The Mega-Fund Player

Silver Lake's December 2025 entry into the TikTok US consortium, alongside Oracle and Abu Dhabi-based MGX, gave the San Mateo-based firm a seat at the most watched deal in global media. The consortium collectively acquired a 45% stake in TikTok's U.S. operations, to be restructured as TikTok USDS Joint Venture LLC. Silver Lake's involvement signals its capacity for politically complex, regulatory-driven transactions at scale, a capability it previously demonstrated in the $24.4 billion Dell leveraged buyout in 2013. Limited partners (LPs) with Silver Lake exposure gain indirect access to social commerce advertising inventory at a moment when TikTok's U.S. ad revenue trajectory is both uniquely valuable and subject to structural uncertainty.

GTCR: The Programmatic Platform Investor

GTCR's Chicago base and TMT investment thesis made Simpli.fi, one of North America's most flexible programmatic advertising platforms, a natural portfolio addition. Simpli.fi's technology enables geo-fenced, addressable, and CTV advertising across thousands of local markets, a model that pairs scale with localized targeting precision. GTCR's approach favors companies with defensible recurring revenue and platform economics, and Simpli.fi fits both criteria with its supply-side platform (SSP) and DSP capabilities. For ad tech companies with proven programmatic infrastructure and an enterprise-grade sales motion, GTCR represents a credible path to institutional capital with deep TMT operating knowledge and a track record of holding companies through technology transitions.

Aperiam Ventures: The Rising Star

Aperiam Ventures identifies itself as the leading adtech and martech venture capital firm, and its investment scope backs that positioning. The firm targets seed through growth-stage investments across programmatic platforms, identity resolution, CTV, and martech tools. Unlike generalist venture capital funds that occasionally write checks into ad tech, Aperiam brings an industry-insider team with operator backgrounds in adtech company building. Its flywheel model, combining venture investment with advisory and technology orchestration services for brands and agencies, creates portfolio access and market feedback loops unavailable at pure-capital VCs. Early-stage ad tech founders seeking a lead investor with genuine sector depth, not just uncommitted capital on a term sheet, should treat Aperiam as a first call.

Truelink Capital: The Agency Liberator

Truelink Capital's March 2025 acquisition of R/GA from Interpublic Group (IPG) ended the digital agency's 23-year tenure under holding company ownership and returned it to full independence for the first time since 2000. R/GA, known for transformative work with Nike, Google, and Samsung, is a premium creative and digital transformation agency with a global footprint. Truelink's investment thesis positions it as a specialist in liberating agencies from holding company constraints, betting that independent positioning and management autonomy drive higher client retention and organic growth than holding company revenue-sharing structures. For agency leaders negotiating PE deals, Truelink's model restores operational independence rather than eliminating it, a structurally different offer from most buyout approaches.

H.I.G. Capital: The Measurement Buyer

H.I.G. Capital's August 2025 acquisition of Kantar Media gave the diversified buyout firm control of one of the global advertising industry's most established measurement and research businesses. Kantar Media provides audience measurement, media planning data, and competitive intelligence to broadcasters, agencies, and advertisers across more than 50 markets. Measurement platforms carry attractive characteristics for PE buyouts: long-term enterprise contracts, high switching costs, and recurring revenue that supports leveraged capital structures. H.I.G.'s move into Kantar Media positions it alongside Novacap (IAS) as one of the two largest PE holders of measurement infrastructure in global advertising, a concentration that makes the firm a significant force in the data and attribution layer of the industry.

Ares Management: The Platform Enabler

Ares Management's 2023 investment in XR, an advertising workflow platform that enables approximately $150 billion in annual TV advertising spending, targeted infrastructure rather than audience or inventory. XR sits at the operational layer of television advertising, managing contracts, placements, and reconciliation for major broadcasters and agencies. Ares, primarily known for credit and alternative asset strategies, applied growth equity and minority stake structures to reach ad tech infrastructure plays with enterprise-scale revenue. For ad tech companies serving the operational layer of TV buying, Ares represents an institutional capital source with appetite for workflow and infrastructure businesses that generate consistent, high-volume transaction revenue without dependence on audience data or cookied targeting.

Investment Trends Shaping Ad Tech PE

Connected TV Advertising Infrastructure

CTV attracted more PE capital in 2025 than any other ad tech subsector. Vitruvian's $637 million DeepIntent deal, MidOcean's GSTV acquisition, and Pinterest's purchase of tvScientific collectively signal that streaming advertising infrastructure commands premium multiples. The shift from linear television to ad-supported streaming platforms is redirecting tens of billions of dollars in brand spending, creating structural demand for programmatic CTV enablement at scale.

Take-Private Activity Targeting Measurement Platforms

The most expensive ad tech deals of 2025 targeted publicly traded measurement and brand safety platforms, not startup-stage growth bets. Novacap's $1.9 billion IAS take-private and H.I.G.'s Kantar Media acquisition both reflect a thesis that ad measurement businesses, with their SaaS-like recurring contracts and regulatory tailwinds around brand safety, trade at a discount in public markets relative to their strategic value. The IAS deal also completed a full cycle: Vista Equity Partners acquired IAS privately in 2018, the company relisted on Nasdaq in 2021, and Novacap took it private again four years later.

Agency Consolidation and Liberation from Holding Companies

IPG's 2025 merger with Omnicom, the largest agency industry combination in history, triggered a wave of divestitures that created PE acquisition opportunities across the agency layer. Truelink Capital's acquisition of R/GA from IPG exemplifies how holding company consolidation creates standalone agency buyouts. Keystone Capital's BarkleyOKRP roll-up demonstrates the parallel buy-and-build strategy, combining independent agencies into scaled platforms without holding company overhead. Both approaches bet that agency independence and operational focus generate better client outcomes than holding company integration.

First-Party Data and Identity Resolution Investment

Third-party cookie deprecation has redirected capital toward identity resolution infrastructure, consent management platforms, and data clean rooms. WPP's acquisition of InfoSum and Viant's purchase of lockr both reflect the conviction that first-party data infrastructure will become the critical layer in programmatic advertising. PE investors building positions in this subsector are betting on regulatory tailwinds, as GDPR enforcement and emerging U.S. state privacy laws continue to raise the cost of non-compliant targeting approaches.

AI-Powered Ad Optimization

Perion's $65 million acquisition of Greenbids in 2025 marks an early wave of PE and strategic investment in AI-driven ad optimization. Greenbids applies machine learning to reduce cost-per-outcome and carbon emissions in programmatic bidding simultaneously. Teachers' Venture Growth's $235 million round in StackAdapt targets a programmatic platform that embeds AI into audience segmentation and creative optimization. As AI capabilities lower the engineering barrier to optimization, investors are differentiating between AI-native platforms with defensible data moats and feature additions grafted onto legacy ad tech stacks.

How to Evaluate Ad Tech PE Firms

Sector expertise is the sharpest filter when assessing PE investors in this space. A generalist buyout firm with one ad tech deal differs meaningfully from GTCR, Vitruvian, or Vista, each of which has built repeatable playbooks through multiple ad tech or marketing technology investments. Ask any prospective investor to name three deals in your specific subsector and describe the operational changes implemented post-acquisition; the specificity of the answer reveals whether sector depth is genuine or marketing.

Investment horizon alignment matters as much as capital availability. PE hold periods typically run three to seven years, and ad tech companies mid-cycle through a technology transition, such as a DSP migrating to cookieless identity, may need longer runways than a five-year fund can support. LPs evaluating PE funds should request the firm's realized internal rate of return (IRR) specifically for technology or ad tech investments, not blended portfolio returns that dilute sector-specific performance.

Cultural and operational autonomy are particularly high stakes in agency acquisitions. Red flags include a history of immediately replacing leadership post-close, setting earnings before interest, taxes, depreciation, and amortization (EBITDA) targets that exceed norms for the subsector, and prioritizing short-term cost reduction over product investment. Agency founders should negotiate talent retention equity pools before signing and request references from at least two existing portfolio company CEOs on how the firm behaves when quarterly targets are missed.

Which Firm Fits Your Needs?

Ad tech founders raising growth capital above $50 million in a CTV, retail media, or identity resolution business should evaluate Vitruvian Partners, GTCR, and Vista Equity Partners first. All three have operational depth in technology scaling and established track records in adjacent subsectors, and Vitruvian's cross-border mandate opens European distribution networks that U.S.-only investors cannot offer. Founders at earlier stages, from seed through Series B, will find Aperiam Ventures the most relevant institutional option given its exclusive focus on adtech and martech portfolio companies and its advisory network across brands and agencies.

Agency owners exploring PE options face a starker choice between models. MidOcean and Truelink Capital both preserve operational independence as a core part of their value proposition, while Keystone Capital's BarkleyOKRP roll-up illustrates the buy-and-build alternative, suited to owners who want M&A resources and scale in exchange for joining a larger platform. For measurement or workflow businesses with enterprise contracts and recurring revenue, H.I.G. Capital and Ares Management have demonstrated both appetite and the ability to underwrite capital structures against subscription-like cash flows.

LPs building alternatives portfolios with media and technology exposure should note that Novacap and H.I.G. Capital now both hold significant measurement platform positions, creating some concentration risk in the ad measurement subsector. Silver Lake offers the broadest single-fund exposure to large-scale digital media, given its involvement in the Dell LBO, TikTok US consortium, and other technology platform investments. Aperiam Ventures, as the only dedicated adtech and martech venture capital firm in this analysis, offers earlier-stage return potential alongside higher volatility, suited to LPs with longer liquidity horizons.

Frequently Asked Questions

What is ad tech private equity?

Ad tech private equity refers to PE and venture capital firms that invest in advertising technology companies, including programmatic platforms, DSPs, supply-side platforms (SSPs), CTV infrastructure, DOOH networks, measurement tools, identity resolution providers, and ad agency networks. Investments range from seed-stage venture bets to billion-dollar leveraged buyouts and take-privates of publicly listed companies. PE accounted for 38% of all media and marketing M&A in 2023.

How many PE firms invest in ad tech?

368 active PE and venture capital funds invest in advertising and marketing technology as of January 2026. A separate count of 174 advertising-focused PE funds exists on institutional deal platforms. The two figures overlap significantly, reflecting the large number of generalist technology investors who participate in ad tech deal flow alongside dedicated sector specialists.

What are the big 4 PE firms and do they invest in ad tech?

The traditional "Big 4" private equity firms, Blackstone, KKR, The Carlyle Group, and Apollo Global Management, all invest opportunistically in media and advertising. Blackstone acquired a majority stake in New Tradition, the billboard company controlling One Times Square. KKR holds FGS Global, a strategic communications firm serving major media and advertising clients. Carlyle, which manages a $222 billion portfolio, acquired global digital marketing firm Incubeta in November 2022 and has active TMT investment activity across its buyout and growth equity funds.

What deal sizes are typical in ad tech private equity?

Deal sizes range from $65 million at the growth equity end to $1.9 billion for large take-privates. The GSTV acquisition by MidOcean Partners ($500-600 million) and Vitruvian's DeepIntent majority stake ($637 million) represent the mid-tier range most active for buyout and growth equity transactions in 2025. StackAdapt's $235 million growth round from Teachers' Venture Growth and co-investors illustrates the upper end of institutional venture growth capital in programmatic platforms.

Which ad tech subsectors attract the most PE investment?

CTV advertising infrastructure, measurement and brand safety platforms, identity resolution and first-party data tools, digital out-of-home networks, and AI-powered ad optimization are attracting the most capital in 2025-2026. Agency roll-ups remain active, particularly following IPG's merger with Omnicom, which generated divestiture opportunities including R/GA's buyout by Truelink Capital. Retail media networks, backed by deals such as DoorDash's $175 million acquisition of retail search ad platform Symbiosys, represent a fast-growing adjacent category.

How do PE firms typically exit ad tech investments?

The three primary exit paths are strategic sale to a larger technology company or holding company, IPO on a public exchange, and secondary sale to another PE buyer. Vista Equity Partners demonstrated the strategic sale model with Marketo, acquiring it for $1.8 billion in 2016 and selling to Adobe for $4.75 billion in 2018. The IAS story illustrates all three paths: PE acquisition by Vista in 2018, IPO on Nasdaq in June 2021, and re-privatization by Novacap at $1.9 billion in 2025. Hold periods in ad tech PE typically run three to seven years, though measurement platform cycles have proven shorter when public market windows align with fund timelines.

Methodology

This article covers firms active in ad tech private equity based on verified deal activity in advertising technology, marketing technology, digital media, and agency businesses. Firm selection required at least one documented investment in an ad tech or marketing technology company within the past five years. Deal values and transaction details reflect public announcements and industry reporting through the end of 2025. Market statistics, including firm counts and PE market share figures, reflect data available as of January 2026. No AUM figures are reported for firms where public data was unavailable at the subsector level. This guide to ad tech private equity is reviewed annually to incorporate new deal activity, updated firm strategies, and emerging subsector trends.