Round
Also known as Funding Round, Financing Round, Equity Round
A round is a single financing event in which a startup issues new securities (preferred stock, SAFEs, or notes) at a defined price or valuation cap, usually with a named lead investor. Carta's 2025 data shows an average round size of $30.2M across all stages in Q4 2025, driven by AI deals at the upper tail.
In depth
A round is the atomic unit of venture financing. It packages a set of terms (price or valuation cap, lead investor, allocation, governance rights, protective provisions) into a single transaction that closes on a defined date. Everything in venture is measured by rounds: round size, round price, round count, time between rounds.
The structural anatomy of a 2025 round has standardized around the NVCA model documents for priced equity rounds and the Y Combinator post-money SAFE for unpriced rounds. The NVCA documents define five core agreements: certificate of incorporation, preferred stock purchase agreement, investors' rights agreement, voting agreement, and right of first refusal and co-sale agreement. Most US venture rounds modify these templates rather than building from scratch.
Round size grew sharply in 2025. Carta data shows the average round across all stages climbed to $30.2M in Q4 2025, up from $19.3M in Q4 2024. The mean is pulled by a small number of massive AI rounds: median round size grew much more slowly, with most of the dollar volume concentrated in the top decile.
Why it matters
Rounds define the dilution path, the governance rights, and the exit economics for everyone on the cap table. A clean round with standard NVCA terms and 1x non-participating liquidation preference protects founder ownership and keeps the cap table predictable. A round with participating preferred, ratchets, or full-ratchet anti-dilution can erase founder ownership entirely in a down-round scenario, even if the company recovers.
For LPs, the round structure also drives mark-to-market math. Venture investments are typically marked to last priced round, so an extension that prices below the previous round forces a write-down even if the company's underlying performance has not changed.
Worked example
A startup raises a $5M priced seed round at $20M pre-money, $25M post-money. The lead writes $3M; two other investors take $1M each. Standard NVCA terms apply: 1x non-participating preferred, weighted-average anti-dilution, no board seat at this round.
Pre-money: $20M
Round size: $5M
Post-money: $25M
Lead investor ownership: $3M / $25M = 12.0%
Co-investor ownership (each): $1M / $25M = 4.0%
Total new investor ownership: 20.0%
Existing shareholder dilution: 20.0%
Effective price per share: set by post-money divided by pre-round fully diluted shares
The round transfers 20% of fully diluted ownership to new investors. If the company later raises a $20M Series A at $80M pre-money, the seed lead's 12% would dilute to roughly 9.6% before any pro-rata participation, illustrating how round-by-round dilution compounds even for early investors who participate forward.
Frequently asked
What is the difference between a priced round and a SAFE round?
A priced round issues preferred stock at a fixed per-share price, requires full legal documentation (NVCA model docs), and usually includes board representation. A SAFE round defers price-setting until the next priced round, using a valuation cap and optional discount. SAFEs are dominant at pre-seed; priced rounds are standard from seed onward.
How long does a round take to close?
Pre-seed SAFEs can close in days. Priced seed rounds typically take 4-8 weeks from term sheet to close. Series A and later rounds run 2-4 months including due diligence, customer references, and final documentation. Bridge rounds and extensions often close faster because the lead investor is already on the cap table.
Who leads a round?
The lead is the investor who sets the terms, signs the term sheet first, and usually writes the largest check. The lead typically takes the board seat (Series A onward) and runs the due-diligence process. Co-lead structures, with two investors splitting lead responsibilities, are increasingly common at Series B and later.
What is a bridge round?
A bridge round is a financing between two priced rounds, usually structured as a SAFE or convertible note that converts at the next round. Bridges typically signal that the company has not hit the milestones expected for a clean priced round. Carta data shows bridge rounds at Series B clear at higher pre-money valuations than primary Series B rounds but with worse terms.
What is a down round?
A down round prices the company below its previous round. Down rounds trigger anti-dilution adjustments for prior preferred holders, dilute common shareholders disproportionately, and often include pay-to-play provisions. Cooley reported pay-to-play frequency reached 10.1% in Q2 2025, largely tied to down rounds at Series B and later.