Features04 · Cap table

04 · Cap table

Your ownership, resolved.

A founder-grade cap table without the founder-grade pain. Shareholders, options pool, SAFEs and convertibles in one ledger — and a pro-forma engine that runs your priced round in the same window where your equity lives.

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SEED · 2026

Ownership

50%

35%

10%

Maya Chen 50.0%Daniel Okonkwo 35.0%Priya Sundaram 5.0%Pool 10.0%

SAFEs outstanding · $850K

Catalyst Fund · LEAD$500K

Sequence Ventures$250K

Avery Lin$100K

STOCKHOLDERS LEDGER

Common, pool, SAFEs — one ledger.

Common, options, SAFEs and convertibles in one view. Vesting schedules, cliffs, notes — the entire history of every share class, structured.

Stockholders ledgerCommon, options, SAFEs and convertibles in one view. Vesting schedules, cliffs, notes — the entire history of every share class, structured.
Pro-forma scenariosModel a $3M raise at $12M post. See dilution per founder, options-pool top-up, post-money math. Save the scenario in-app.
Native SAFE e-signSend SAFEs for signature from inside Arx — no DocuSign, no other tab. Public signer flow, signed PDF lands on the SAFE record, wire-instructions email triggered on close.

LEDGER

Common · pool · SAFEs

50%

35%

10%

Maya Chen 50.0%Daniel Okonkwo 35.0%Priya Sundaram 5.0%Pool 10.0%

SAFEs outstanding · $850K

Catalyst Fund · LEAD$500K

Sequence Ventures$250K

Avery Lin$100K

PRO-FORMA

Model a priced round in thirty seconds.

Tap "New scenario," type a post, choose your lead's preferred pool size. Arx runs the math live — pre-money, dilution per holder, new pool, post-money percentages — and saves the scenario for sharing in-app.

Live mathEvery input updates founders, employees, and SAFEs simultaneously.
SAFE conversionPre/post-money, MFN, valuation cap, discount — handled.
In-app scenariosSave and compare pro-forma scenarios inside Arx — built for seed-round modeling, not 409A or cap-table-of-record.

PRO-FORMA · v3

Series Seed · $3M @ $12M post · 10% pool

Holder	Pre	Post	Δ
Maya Chen	50.0%	36.4%	−13.6
Daniel Okonkwo	35.0%	25.5%	−9.5
Priya Sundaram	5.0%	3.6%	−1.4
SAFEs (3)	—	7.1%	new
New lead	—	17.4%	new
Options pool	10.0%	10.0%	0.0

Founders retain 61.9% after this round and one priced extension. Within seed-stage norms.

SAFE LIBRARY

Every SAFE, side-letter, and signed PDF.

Upload the signed SAFE. Arx parses cap, discount, MFN, pro-rata and lead flags into structured fields — and keeps the original PDF attached. Side letters live next to the SAFE they qualify.

Auto-parseY-Combinator post-money or pre-money templates supported out of the box.
Side lettersMFN, pro-rata, information rights — surfaced as badges on the holder.
Audit trailEvery edit is logged. Restore any prior state of the ledger.

SAFES · 4

SAFEs & convertibles

Catalyst Fund

$500K

LEADMFNPRO-RATA$9M post

Sequence Ventures

$250K

MFN$9M post

Avery Lin

$100K

$8M post

Halo SAFE Note

$250K

DISCOUNT 15%$10M post

Begin here

Run your round the way the best founders do.

Start free trial →All features

Your ownership, resolved.

Common, pool, SAFEs — one ledger.

Model a priced round in thirty seconds.

Every SAFE, side-letter, and signed PDF.

Pairs nicely with.

Forecast

Live cap-table export

Investors list

Run your round the way the best founders do.