Airframe· 50-Year Series· Q2 2026· Piece 2 of 3
The Software Innovators Leaderboard · by ownership cohort

$26T

Four cohorts. Four stories.

The existing $26 trillion of enterprise software is split across four ownership cohorts. Three of them are in a structurally different position than their owners realize. This is what's inside each.

Public cohort
$18.0T
PE-held cohort
$1.1T
VC-private cohort
$5.2T
Acquired cohort
$1.8T
By Paul Hsiao
The frame

The $26T is not a single bucket.

The $26T of the Software Innovators Leaderboard is not a single bucket. It splits into four ownership cohorts, Public, PE-owned, VC-private, and Acquired. The Public cohort is the only one working as designed, repricing in plain sight on quarterly earnings calls. The other three are each broken in a different way: PE-owned is breaking on the Medallia mechanic, VC-private is trapped behind a velvet rope, and Acquired is being misread as validated value when most of it is failed independence. For an investor, owner, or operator of a software company, the cohort an asset sits in is now doing more of the work than the category it competes in. This piece walks each.

Cohort
Value
Companies
Share
Status
Public
$18.0T
218
68.9%
Working as designed · repricing on tape
PE-held
$1.1T
456
4.4%
Breaking · Medallia mechanic, $46.9B distressed
VC-private
$5.2T
1,109
19.9%
Trapped · behind a velvet rope
Acquired
$1.8T
625
6.8%
Misread · failed independence dressed as value
Cohort 1 · The Public Cohort · The Baseline

The public cohort is being marked down in plain sight.

The 218 companies in the public cohort carry $18.0 trillion of value, sixty-nine percent of the leaderboard, and the only cohort an individual investor can actually touch. It is also the cohort the AI cohort is repricing first, because public companies are obliged to mark their position every quarter and obliged to act on it where the math no longer works.

Every SaaS-era public name is now sitting in front of the same productivity comparison, against the same AI-native cohort, with the same set of obligations to its shareholders. The adjustments will arrive one at a time, on quarterly earnings calls, over the next two years, with the named Wave IV substitutes (Cursor, Hex, Glean, Clay, and the three frontier labs behind them) already winning the net-new line items where they compete. The public cohort is the cohort where the repricing is most legible, because it is the cohort where it has to be disclosed.

Cohort 2 · The PE-held Cohort · The $1T Problem

On April 22, 2026, Thoma Bravo handed Medallia to its lenders.

The mechanics matter, because the same mechanics apply to roughly a dozen other deals on the same shelf.

Thoma Bravo had taken Medallia private in 2021 for $6.4 billion. By April of this year, the equity was worth roughly zero. Blackstone, KKR, Apollo, and Antares — the private credit lenders sitting senior to the equity — now own the company. Thoma Bravo and its co-investors wrote off roughly $5.1 billion. The trigger was not a missed quarter or a sudden customer loss. It was the expiration, at year-end 2025, of a Payment-in-Kind relief arrangement that had let Medallia defer its cash interest by piling it onto principal. Once that mechanism switched off, the cash interest bill arrived in full, against revenue and EBITDA that had not grown the way the 2021 underwriting assumed. The capital structure failed. The company kept operating; the equity went to zero.

Medallia was the first big one, and it will not be the last. Across the 456 enterprise software companies that sit in private-equity hands in our register, combined enterprise value $1.1 trillion, there is somewhere in the neighborhood of $46.9 billion in distressed software loans currently in the private credit market, according to Moody's. A meaningful share of that capital was deployed during the 2021 vintage, at peak multiples, with deal structures that financed up to half of the purchase price with debt at rates that only worked when interest rates were near zero.

Those rates are no longer near zero. The expansion math underwriting the debt has not held. And the AI cohort underneath the SaaS layer is now compressing the very expansion math the LBO models needed to clear.

Figure · From total PE-held to first realized write-off · how the exposure cascades
Source · Airframe register + Moody's + S&P Global · April 2026
Total PE-held software stack · 2026
$1.1T456 companies
Every software vendor held by a private-equity firm in the airframeai/software-50 register.
↓ Cohorts the AI wave is most directly repricing
Exposed cohorts · 1985–2009 vintage
$903B337 companies
SaaS-era and on-prem-era vendors, each now competing for the same budget against an AI-native challenger in their category.
↓ Capital structures the rate-and-AI environment is not delivering against
Distressed software loans · private credit market
$46.9BQ1 2026
Held inside the publicly traded BDCs and the direct-lending market that financed the 2021 vintage.
↓ The first equity wipeout
Realized write-off · Medallia · April 22, 2026
$5.1BEquity to zero
Senior lenders (Blackstone · KKR · Apollo · Antares) took the company. Thoma Bravo and co-investors wrote off the equity.
Each band is the subset of the band above it. The reckoning is mechanical because the buyer-shift is structural, and it will keep producing wipeouts at the pace the substitutes mature category by category. Roughly two years, on current category-displacement curves.

The named PE-held software companies the trade press has flagged in 2026 carry debt structures that depend on growth or refinancing assumptions the current rate and category environment is not delivering. Numbers below come from the Airframe register; debt and lender details from S&P Global Market Intelligence, SaaStr's analysis, and Octus.

PE Watchlist · 7 named deals · 2026

$46 billion of equity-plus-debt exposure, against capital structures the current rate-and-AI environment is not delivering.

No. 01

Medallia

Customer survey
Status · 2026
Equity wiped · April 22, 2026
Sponsor
Thoma Bravo
Take-private
$6.4B · 2021
Founded
2001
EV · today
$7.1B

Senior lenders (Blackstone, KKR, Apollo, Antares) now control the company. Customer survey software, a category directly threatened by AI-native voice-of-customer analytics.

No. 02

Proofpoint

Cybersecurity
Status · 2026
Most-watched name in the portfolio
Sponsor
Thoma Bravo
Take-private
$12.3B · 2021
Founded
2002
EV · today
$12.3B

Roughly $4 billion of buyout debt against approximately $150M of adjusted annual EBITDA. Interest coverage that only worked at near-zero rates. Total debt load now around $4.67B after a dividend recap and the Hornetsecurity acquisition. Six of the seven distressed private credit funds hold material exposure to it.

No. 03

Coupa

Procurement
Status · 2026
Debt-to-equity ratio ~65/35
Sponsor
Thoma Bravo
Take-private
$8B · 2022
Founded
2006
EV · today
$8.0B

Up to thirty percent of the workforce cut post-acquisition. Procurement and spend management is one of the categories autonomous agents threaten most directly, on the seat-based pricing model the entire LBO underwriting assumed.

No. 04

Anaplan

Planning
Status · 2026
Loans near par — for now
Sponsor
Thoma Bravo
Take-private
$10.7B · 2022
Founded
2006
EV · today
$10.4B

Same vintage, same sponsor concentration, same AI-exposed planning category as Coupa. Operationally executing better. The leverage is still in the capital stack.

No. 05

Zendesk

Customer support
Status · 2026
~$4.6–5B private credit
Sponsor
Hellman & Friedman + Permira
Take-private
$10.2B · 2022
Founded
2007
EV · today
$10.2B

Customer support is ground zero for agent replacement of seats. Zendesk's own AI offering is reportedly generating $200M+ in ARR. The open question is whether that grows faster than the legacy seat revenue shrinks.

No. 06

Avalara

Tax compliance
Status · 2026
~$2.5B private credit · Blue Owl
Sponsor
Vista Equity Partners
Take-private
$8.4B
Founded
2004
EV · today
$8.4B

Tax compliance is more defensible than most SaaS categories, but the leverage was structured at peak-vintage assumptions.

No. 07

Smartsheet

Work management
Status · 2026
Loans on secondary bid/offer
Sponsor
Vista + Blackstone
Take-private
$8.4B · late 2024
Founded
2005
EV · today
$8.9B

Loans have already appeared on private credit secondary bid/offer lists.

No. 08

New Relic

Observability
Status · 2026
SOFR + 6.75% · ~$300M annual interest
Sponsor
Francisco Partners + TPG
Take-private
$6.5B · 2023
Founded
2007
EV · today
$6.5B

A $2.65B debt package led by Blue Owl and Sixth Street, with Blackstone participating, priced at SOFR + 6.75%. Roughly $300M of annual interest against a business mid-transition to consumption pricing. Observability is one of the most directly AI-exposed categories: agents now write their own telemetry, and Datadog and Grafana are already cannibalizing the entry points.

No. 09

Sophos

Cybersecurity
Status · 2026
Moody's downgrade B3 from B2 · March 2026
Sponsor
Thoma Bravo
Take-private
$3.9B · 2020
Founded
1985
EV · today
$3.6B

In March 2026, Moody's downgraded the company to B3 from B2 ahead of $2.6B in upcoming maturities. The company is reportedly exploring private credit refinancing for a December 2026 revolver and $2.5B-equivalent senior secured first lien term loans due March 2027. Leverage projected to move toward 9× in fiscal 2026 from 6.3× in fiscal 2025.

Numbers from the Airframe register; debt and lender details from S&P Global Market Intelligence, SaaStr, and Octus.

That is roughly $46 billion of equity-plus-debt exposure across seven named deals, and it does not include the dozens of mid-sized deals in the same vintage carrying the same structural issues at smaller scales. SaaStr counts at least twelve more deals with combined debt exposure north of $50 billion at meaningful risk over the next two years.

The three assumptions bending at once
01
Revenue growth has slowed
2021 underwriting15–25%YoY
2026 realitymid-singleor flat
02
Net retention has compressed
LBO model110%+NRR
At scale<100%in named cats
03
The refi window has closed
2021 assumptionratesnormalize lower
2026 refi cost~2×interest expense

A leveraged buyout of an enterprise software company works on three assumptions: revenue grows modestly, net retention stays above 110%, and the debt can be refinanced when it comes due. All three are bending at once. Revenue growth across the named PE-held names has compressed from the 15–25% range at the time of the take-private to mid-single-digits or, in some cases, flat. Net retention at scale is moving below 100% in categories where it has not been below 100% in a decade. Refinancing the same debt at 2026 rates roughly doubles the interest cost, which is exactly the math that broke Medallia when its PIK relief expired. The companies most exposed are the ones whose debt comes due in 2026, 2027, and 2028. We are now inside that window.

The PE cohort is the one the trade press has narrated for two years. It is the wrong $1 trillion. The larger pool of stuck capital sits in the next cohort over, on the other side of an access regime the previous four waves of software did not have.

Cohort 3 · The VC-private Cohort · $5T LP Liquidity Trapped

The biggest wealth-creation event in software history is happening behind a velvet rope.

Microsoft went public in 1986 at a valuation of roughly $500 million. A schoolteacher with a brokerage account could buy a share that afternoon. Twenty years later, that share was worth more than fifty times what she paid for it. Salesforce was founded in 1999 and listed in 2004 at $1.1 billion. Same story. So is the entire SaaS cohort that followed: Workday, ServiceNow, Shopify, Atlassian, HubSpot, Okta, Twilio, Veeva, Dropbox, Box, Zendesk. Twelve companies, public for most of their growth, now collectively worth roughly $511 billion. Every dollar of that compounding was available to anyone with a discount-brokerage login.

That pattern is over.

The three frontier AI labs at the front of the current cohort — OpenAI, Anthropic, and xAI (now part of the merged X/SpaceX entity) — are now jointly worth roughly $2.1 trillion, and an individual investor with a 401(k) and a Fidelity account cannot buy a share of any of them. Neither can her brother, who's been allocating to public software ETFs for fifteen years. Neither can her financial advisor. Neither, in most cases, can the pension fund that manages her teacher's-union retirement assets, because access to the small private rounds these companies do run is rationed to a handful of repeat venture investors and sovereign wealth funds writing ten-billion-dollar checks. The largest data platform most of the AI cohort runs on is private. The payments platform that moves a trillion dollars a year is private. The companies setting the productivity ceiling of the next decade of software are, in 2026, almost entirely unavailable to the people whose savings powered the last one.

LP liquidity · the DPI gap
Across the enterprise software companies in our complete vendor register, $5.2 trillion of enterprise value is trapped in the venture-capital-private stack — 1,109 companies whose valuations live as paper marks on LP statements, not as cash that has come back. The gap between NAV and DPI has never been wider: marks keep compounding on quarterly reports while the cash distributions that fund pension obligations, university endowments, and the next vintage's commitments arrive at a trickle. The cohort that should have been the largest source of LP liquidity this decade is, in 2026, the largest source of LP illiquidity.

The cost lands on the LPs first. Smaller institutional LPs — university endowments outside the top tier, regional foundations, public-sector pension funds in mid-sized states — are now selling their LP stakes in venture funds on secondary markets at discounts of twenty to forty percent against the fund's stated NAV. They are taking real losses on paper-good positions because the cash is not coming and the bills are.

The access asymmetry · public tape vs private tape

Twelve SaaS pure-plays produced $511B over twenty years on the public tape. Three AI labs produced $2.1T in under a decade — none of it available to retail.

12 SaaS pure-plays · 20+ yrs · public
$511B
Retail accessible · any brokerage
3 AI labs · <10 yrs · private
$2.1T
Accredited / institutional only

The $5 trillion locked here is roughly five times the PE cohort that gets the headlines. The trade press has spent two years narrating the $1.1 trillion PE-held cohort as the trapped-capital story of the cycle. It is the wrong $1 trillion. The number that matters is on a different shelf entirely, and it is sitting behind an access regime the previous four waves of software did not have.

Our read
The single largest unresolved question in U.S. capital markets in 2026 is whether the public-market access regime that worked for fifty years is going to work for the AI cycle, or whether the largest software wealth-creation event in history will resolve entirely behind a velvet rope. The trade press has narrated this as a bubble question. It is a distribution question. The thing being kept from the public is not the risk. It is the upside.
Cohort 4 · The Acquired Cohort

Failed independence, not validated value.

A meaningful fraction of the Software Innovators Leaderboard — companies that crossed $500M and were subsequently absorbed — represents failed independence, not validated value. Many were acquired below their peak. Many were folded into larger platforms and effectively disappeared as products. Many were bought to neutralize a competitor rather than to extend a strategy.

The acquired cohort and the public cohort tell different stories. The public cohort is a list of companies that built durable independence. The acquired cohort is a list of companies that built enough leverage to be bought — a meaningfully different and often less impressive achievement. We separate them because the lesson of the dataset depends on the distinction.

This leads to an important fact: each technology era is layered and additive. Each era builds on top of the previous era but the vendor still got replaced. Software has moved through eight phases of disruptive technological change. The instinct is to read these as a sequence of replacements. The reality is that each wave builds on the previous technology era like layered substrates. Mainframe software still runs most of the world's banks today. What gets replaced reliably is the vendor on the line item. The acquired cohort tells that story. In the AI era, no leader on this list is safe.

In closing

Four cohorts describe the existing $26T. The Public cohort is the baseline. The other three are each broken in a different way.

That is the editorial conceit of this piece in one line. Public is working as designed, repricing in plain sight. PE-owned is breaking on the Medallia mechanic. VC-private is trapped behind a velvet rope. Acquired is being misread as validated value when most of it is failed independence. Three different mechanics, one editorial through-line: the cohort an asset sits in is doing more of the work than the category it competes in.

The next $26 trillion is being built against a different denominator entirely. Piece 3 walks through it.

research@airframe.ai

— Paul