Enter your private holdings once and Portfolio OS does what a fund back office does: marks every position against the real QuantLogix roster and the live secondary tape, adjusts your ownership for every post-entry round, and turns the book into decisions — concentration risk, follow-on reserve allocation, a cash-flow J-curve, and secondary-window alerts. Your book lives in this browser only; analysis is computed on request and never stored.
Every mark is explained — click a row for the plain-English note. SECONDARY marks layer where the tape trades vs last-round pricing; ROSTER marks use the current roster valuation; COST positions hold at entry until a priced event.
Invested capital vs today's mark, per holding — the lines that actually drive the book, largest current value first.
Saved in this browser only (nothing leaves your device until you hit Analyze). Link a holding to the roster with its slug — e.g. databricks, perplexity — and Portfolio OS marks it live; leave the slug blank for unlisted angel lines held at cost.
Write plainly, one line or a paragraph — e.g. "$250k into Ramp Series D in Apr 2022 at an $8.1B post, ~0.003% — core". QL Intelligence extracts each company, amount, round, entry date, valuation and ownership, matches it to the roster where it can, and adds it to your book to review. Or pull the deals you already track in your CRM.
The same lens an LP would put on a fund: Herfindahl–Hirschman Index over position weights, top-name weight, and where a single reprice hurts.
Pro-rata is a right you have to fund. The planner projects each name's next round, prices your pro-rata, ranks by conviction + momentum, and allocates your reserves greedily down the list — the discipline funds run on paper, applied to your book.
Click a row to see why it ranks where it does.
Capital calls (your funded follow-ons, landed when each round is expected) against expected distributions (per-stage exit timing × probability). Net per year is what your treasury actually feels.
Holdings with a live secondary tape, classified: SELL WINDOW ≥15% premium with real depth · TRIM premium on a watch-list name · ADD WINDOW ≥10% discount on core conviction · HOLD everything else. Depth uses a strict-percentile read of open interest across the whole active tape.
Marks — a roster-linked holding is marked as your dilution-adjusted ownership × the company's current roster valuation. Where the secondary tape is active, the mark is further adjusted by where secondaries trade vs last-round pricing (the vs-last-round premium or discount). Unlinked holdings are held at cost — no invented marks.
Dilution — every funding round after your entry dilutes your stake by that round's actual amount ÷ post-money where disclosed, else a 15% default; holdings flagged pro-rata-maintained keep their entry ownership. This is a model of typical primary dilution, not your cap table.
IRR — annualized from your entry date to today off the current mark. Holds under 30 days show no IRR: annualizing a fresh mark is noise, not signal.
Follow-on planner — next-round sizes come from a stage ladder floored at 1.25× the last disclosed round; timing from stage cadence off the last event. Priority is conviction (core 45 / standard 25 / watch 8) plus momentum from the secondary tape or roster markup. Reserves fill greedily down that list.
Cash flow — expected distributions use per-stage years-to-exit and exit-probability heuristics with modest mark growth; exits modeled beyond the horizon contribute nothing. All knobs are listed on the Cash Flow tab.
What this is not — a valuation opinion, tax or investment advice, or an offer to transact. Secondary marks reflect indicative tape data, not executable prices. The demo book is invented position data over real company names; only the company-level figures come from the datasets.
Educational research and planning tool. Marks, IRRs, planner outputs, and projections are computed from your inputs and public/indicative data; private-market pricing is uncertain and secondary indications are not executable quotes. The demo book is invented and implies no relationship with the companies shown. QuantLogix is not a registered investment advisor or broker-dealer.