The 2021 Cohort: $633B Raised, Then Silence. 2026–2028 Is When It Resolves.

Every era of the private markets leaves a cohort behind. The dot-com bust had its zombies; 2008 had its “lost vintage.” The 2021 boom left the largest one ever assembled, and it is now sitting in plain sight in the filing record, waiting on arithmetic.

We can measure it from three directions at once, because we keep three tapes: every US Form D raise, every US fund filing, and dated acquisition records across the major software PE firms. All three point at the same three years.

The companies: 8,107 raised, then stopped

In our Form D universe of funded US operating companies, 8,107 last raised in 2021 or 2022 and have never filed again. Together they took in $633B — overwhelmingly at the highest prices in venture history. 4,691 of them raised $5M or more; 2,159 raised $20M or more.

Four-plus years of filing silence is not automatically fatal — we published the full base rates, and quiet is the majority experience of funded companies. But this cohort’s silence is different in one way that matters: it began at peak prices. A company that last priced itself in 2021 carries that mark — and its preference stack — into every conversation it has in 2026.

The funds: the other side of the same cap tables

Here is the same cohort seen from the investor side, in our tape of 87,317 US fund filings:

26,972 funds were raised in 2021–22 — roughly double any era before it. Those funds deployed into exactly the companies above, and they run on the 10-year clock we’ve written about before: invest in years 1–4, harvest in years 5–10. The largest fund cohort in history is now crossing into its harvest years simultaneously, with much of its capital marked to 2021 prices that today’s market won’t pay.

A fund can extend, sell secondaries, or run a continuation vehicle. What it cannot do is stop time. Every quarter from here, the pressure on those funds to manufacture liquidity rises — and that pressure lands on the boards of the 8,107.

The sponsors: same math, bigger checks

Private equity bought the top too. In our news-dated tape of 2,685 platform acquisitions across 21 software-focused PE firms, 360 were made in 2021 — double the surrounding years. Those platforms are now 4–5 years into holds, in portfolios where the median current hold already runs 4.9 years and a quarter of holdings are past year seven.

Sponsors respond to being underwater the same way funds do — extend, refinance, wait. But sponsor patience has a horizon too, and an aging 2021 platform resolves in one of two ways that matter to everyone near it: it finally trades (repricing its whole category), or it goes shopping for add-on acquisitions to grow into its price. Either way, M&A arrives in that category on the sponsor’s schedule.

Why the window is 2026–2028

Put the three clocks side by side:

• Fund clocks: the 2021–22 vintages hit years 5–7 — peak harvest pressure — in 2026–2028.
• Preference math: five to seven years of accrued preferences on 2021 stacks is when common equity either clears the hurdle or visibly never will, forcing the conversation either way.
• Hold ages: 2021 PE entries reach the 5–7 year band — where our data shows sponsors historically sell — in the same window.

None of these depends on sentiment, rates, or the next platform shift. They’re calendars. That’s why we’d argue software exit volume over the next three years is already substantially determined — the only open question for any individual company in the cohort is whether it meets the window deliberately or gets met by it.

If you’re in the cohort

You know if you are: last priced in 2021–22, quiet since. Three things the data argues for.

Read your own clocks before someone reads them to you. Which investor’s fund is oldest, what the preference stack means at realistic prices, which sponsors own your competitors and how deep into their holds they are. Every one of those is knowable — most of it from public filings.

Distinguish the mark from the business. A 2021 valuation that won’t repeat says little about whether the company is worth owning — buyers in our M&A tape pay for revenue quality, retention, and strategic fit, not for your last round’s memo. Companies that grew through the quiet years often clear their stacks cleanly; the tragedy cases are usually the ones that waited two extra years to check.

Windows reward the early. When a large cohort resolves on one schedule, the first companies through get the scarcity premium and the full attention of buyers; the last get compared to every deal that closed before them. That is as close to a law as M&A has.

Every number here is computed from our own tapes — SEC Form D filings, SEC fund filings, and news-sourced PE acquisition dates — primary sources, nothing estimated. If you’re in the 2021 cohort and want the map of your specific corner — the fund ages on your cap table, the sponsors around you, the buyers active in your category — that’s the work we do, and the first conversation is confidential and without obligation.