# Y Combinator × EDGAR — batch mindmap and filings timeline As of **Monday Aug 24, 2026** (America/Denver). Built only from confirmed matches in `yc-public-filings.json` (25) and `yc-form-d-portfolio.json` (531 extras). **No companies or CIKs were invented.** ## Headline coverage - **556 / 6,191** directory companies have a confirmed EDGAR CIK (**9.0%**). - **25** public / SEC-rich set (23 official YC status = Public, plus Reddit and Stripe). - **531** additional portfolio companies with a confirmed Form D CIK. - **18** first-party YC fund vehicles (Form D / D/A only; 335 Pioneer Way, Mountain View, CA). - Coverage file: 2,801 names searched; 3,365 unsearched. A zero hit is not evidence the company is not YC. Sources: `yc-companies.json` (directory), `yc-public-filings.json`, `yc-form-d-portfolio.json`, `yc-entities.json`, `yc-filings-timeline.json`, `yc-edgar-coverage.json`. ## Mindmap YC root → fund vehicles → batches that have at least one confirmed match. Each batch lists public/ticker names only, plus a Form D remainder count. The 556 names are **not** all drawn here; the full list is in `yc-matched-all.json`. ```mermaid mindmap root((YC EDGAR 556 of 6191)) Fund vehicles 18 CIKs 2015 x1 CONTINUITY FUND I 2016 x1 Continuity Affiliates Fund I 2017 x6 YC II YC III YC AFFILIATES FUND II YC PRINCIPALS FUND II YC PRINCIPALS FUND III YC Affiliates Fund II QP 2019 x1 YC Affiliates Fund IIA 2020 x2 ES20 YCC20 2021 x1 YCCG21 2022 x1 YC ESP22 2024 x4 ES24 YC ESP24 YCP24 YC ECO24 2026 x1 ES26 Portfolio batches with matches S05 1 of 9 Reddit RDDT W06 1 of 7 plus 1 Form D S06 2 of 11 plus 2 Form D W07 2 of 13 plus 2 Form D S07 3 of 19 Dropbox DBX plus 2 Form D W08 3 of 21 plus 3 Form D S08 1 of 22 plus 1 Form D W09 2 of 16 Airbnb ABNB plus 1 Form D S09 2 of 26 Stripe plus 1 Form D W10 1 of 27 plus 1 Form D S10 6 of 36 PagerDuty PD Presto PRST plus 4 Form D W11 7 of 45 plus 7 Form D S11 6 of 60 plus 6 Form D W12 15 of 66 Matterport MTTR Amplitude AMPL plus 13 Form D S12 15 of 83 Instacart CART Coinbase COIN plus 13 Form D W13 9 of 46 plus 9 Form D S13 10 of 52 DoorDash DASH plus 9 Form D W14 18 of 74 Weave WEAV plus 17 Form D S14 13 of 78 Ginkgo Bioworks DNA Oklo OKLO Rigetti Computing RGTI plus 10 Form D W15 21 of 110 GitLab GTLB Notable Labs NTBL EquipmentShare EQPT Lucira Health LHDX plus 17 Form D S15 14 of 104 plus 14 Form D W16 34 of 122 Embark Trucks EMBK plus 33 Form D S16 21 of 102 Meesho plus 20 Form D W17 23 of 116 plus 23 Form D S17 21 of 125 BillionToOne BLLN plus 20 Form D W18 27 of 146 Groww plus 26 Form D S18 26 of 131 Momentus MNTS plus 25 Form D W19 35 of 194 plus 35 Form D S19 26 of 176 plus 26 Form D W20 23 of 229 plus 23 Form D S20 29 of 209 Pardes Biosciences PRDS plus 28 Form D W21 35 of 336 plus 35 Form D S21 32 of 391 plus 32 Form D W22 24 of 398 plus 24 Form D S22 15 of 234 plus 15 Form D W23 6 of 274 plus 6 Form D S23 5 of 220 plus 5 Form D W24 9 of 248 plus 9 Form D S24 5 of 248 plus 5 Form D F24 1 of 94 plus 1 Form D W25 3 of 166 plus 3 Form D Sp25 1 of 143 plus 1 Form D S25 1 of 166 plus 1 Form D W26 1 of 199 plus 1 Form D Sp26 1 of 196 plus 1 Form D ``` ### 18 first-party YC fund vehicles Confirmed EDGAR issuers at 335 Pioneer Way, Mountain View, CA 94041. Form D / D/A only. | First Form D | Legal name | CIK | Filings | |:-------------|:-----------|:----|--------:| | 2015-06-15 | Y COMBINATOR CONTINUITY FUND I, L.P. | 0001645142 | 1 | | 2016-03-25 | Y Combinator Continuity Affiliates Fund I, L.P. | 0001670489 | 2 | | 2017-11-29 | YC II, L.P. | 0001723360 | 3 | | 2017-11-29 | YC III, L.P. | 0001723395 | 1 | | 2017-12-08 | YC AFFILIATES FUND II, L.P. | 0001724748 | 1 | | 2017-12-08 | YC PRINCIPALS FUND II, L.P. | 0001724750 | 1 | | 2017-12-08 | YC PRINCIPALS FUND III, L.P. | 0001724749 | 1 | | 2017-12-15 | YC Affiliates Fund II (QP), L.P. | 0001725398 | 1 | | 2019-10-03 | YC Affiliates Fund IIA, L.P. | 0001789526 | 1 | | 2020-05-14 | Y Combinator ES20, LLC | 0001811911 | 1 | | 2020-06-12 | YCC20, L.P. | 0001814669 | 1 | | 2021-06-24 | YCCG21, L.P. | 0001868863 | 7 | | 2022-01-18 | YC ESP22, L.P. | 0001904166 | 3 | | 2024-04-09 | Y Combinator ES24, LLC | 0002018779 | 1 | | 2024-04-09 | YC ESP24, L.P. | 0002018782 | 1 | | 2024-04-09 | YCP24, L.P. | 0002018788 | 1 | | 2024-11-21 | YC ECO24, L.P. | 0002043687 | 1 | | 2026-04-27 | Y Combinator ES26, LLC | 0002131827 | 1 | ## Filings over time **First filings** = first Form D date when known, else first filing attributed to the YC operating company (556 matches). **IPOs / listings** = one going-public event per company from `yc-filings-timeline.json`: `ipo_effectiveness`, `ipo_listing_8a12b` (BillionToOne), or `s4_effectiveness` (de-SPAC). 22 of the 25 public-set companies have a listing event; Stripe, Meesho, and Groww do not. ```mermaid xychart-beta title "First EDGAR filings by year (556 matches)" x-axis [2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026] y-axis "Companies" 0 --> 87 bar [3, 3, 12, 10, 15, 18, 23, 29, 35, 55, 52, 49, 82, 58, 39, 33, 28, 12] ``` ```mermaid xychart-beta title "US IPOs / listings by year (22 companies)" x-axis [2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026] y-axis "Listings" 0 --> 12 bar [1, 1, 2, 10, 2, 2, 2, 1, 1] ``` | Year | First filings | IPOs / listings | of which traditional IPO | of which de-SPAC | |-----:|--------------:|----------------:|-------------------------:|-----------------:| | 2009 | 3 | 0 | 0 | 0 | | 2010 | 3 | 0 | 0 | 0 | | 2011 | 12 | 0 | 0 | 0 | | 2012 | 10 | 0 | 0 | 0 | | 2013 | 15 | 0 | 0 | 0 | | 2014 | 18 | 0 | 0 | 0 | | 2015 | 23 | 0 | 0 | 0 | | 2016 | 29 | 0 | 0 | 0 | | 2017 | 35 | 0 | 0 | 0 | | 2018 | 55 | 1 | 1 | 0 | | 2019 | 52 | 1 | 1 | 0 | | 2020 | 49 | 2 | 2 | 0 | | 2021 | 82 | 10 | 5 | 5 | | 2022 | 58 | 2 | 0 | 2 | | 2023 | 39 | 2 | 1 | 1 | | 2024 | 33 | 2 | 1 | 1 | | 2025 | 28 | 1 | 1 | 0 | | 2026 | 12 | 1 | 1 | 0 | | **Total** | **556** | **22** | **13** | **9** | Listing events (company — year): - **2018:** Dropbox (IPO) - **2019:** PagerDuty (IPO) - **2020:** DoorDash (IPO), Airbnb (IPO) - **2021:** Lucira Health (IPO), Coinbase (IPO), Matterport (de-SPAC), Momentus (de-SPAC), Ginkgo Bioworks (de-SPAC), Amplitude (IPO), GitLab (IPO), Embark Trucks (de-SPAC), Weave (IPO), Pardes Biosciences (de-SPAC) - **2022:** Rigetti Computing (de-SPAC), Presto (de-SPAC) - **2023:** Instacart (IPO), Notable Labs (de-SPAC) - **2024:** Reddit (IPO), Oklo (de-SPAC) - **2025:** BillionToOne (IPO) - **2026:** EquipmentShare (IPO) ## Per-batch matches Oldest → newest. Notable names = public/ticker companies when present; otherwise up to three Form D names (top-company first). Full company lists are in `yc-matched-by-batch.json`. | Batch | Directory | Matched | Public | Form D | Notable names | |:------|----------:|--------:|-------:|-------:|:--------------| | S05 | 9 | 1 | 1 | 0 | Reddit (RDDT) | | W06 | 7 | 1 | 0 | 1 | Clustrix | | S06 | 11 | 2 | 0 | 2 | OMGPop, Scribd | | W07 | 13 | 2 | 0 | 2 | Twitch, Weebly | | S07 | 19 | 3 | 1 | 2 | Dropbox (DBX) | | W08 | 21 | 3 | 0 | 3 | Heroku, Machine Zone, RescueTime | | S08 | 22 | 1 | 0 | 1 | Cloudant | | W09 | 16 | 2 | 1 | 1 | Airbnb (ABNB) | | S09 | 26 | 2 | 1 | 1 | Stripe | | W10 | 27 | 1 | 0 | 1 | Optimizely | | S10 | 36 | 6 | 2 | 4 | PagerDuty (PD), Presto (PRST) | | W11 | 45 | 7 | 0 | 7 | DrChrono, GOAT Group, HelloSign, +4 more | | S11 | 60 | 6 | 0 | 6 | Codecademy, Parse, Compose, +3 more | | W12 | 66 | 15 | 2 | 13 | Matterport (MTTR), Amplitude (AMPL) | | S12 | 83 | 15 | 2 | 13 | Instacart (CART), Coinbase (COIN) | | W13 | 46 | 9 | 0 | 9 | Heap, Kalibrr, Wevorce, +6 more | | S13 | 52 | 10 | 1 | 9 | DoorDash (DASH) | | W14 | 74 | 18 | 1 | 17 | Weave (WEAV) | | S14 | 78 | 13 | 3 | 10 | Ginkgo Bioworks (DNA), Oklo (OKLO), Rigetti Computing (RGTI) | | W15 | 110 | 21 | 4 | 17 | GitLab (GTLB), Notable Labs (NTBL), EquipmentShare (EQPT), Lucira Health (LHDX) | | S15 | 104 | 14 | 0 | 14 | OpenInvest, Scentbird, Teleport, +11 more | | W16 | 122 | 34 | 1 | 33 | Embark Trucks (EMBK) | | S16 | 102 | 21 | 1 | 20 | Meesho | | W17 | 116 | 23 | 0 | 23 | Faire, Rippling, KidPass, +20 more | | S17 | 125 | 21 | 1 | 20 | BillionToOne (BLLN) | | W18 | 146 | 27 | 1 | 26 | Groww | | S18 | 131 | 26 | 1 | 25 | Momentus (MNTS) | | W19 | 194 | 35 | 0 | 35 | Deel, Trexo Robotics, Latchel, +32 more | | S19 | 176 | 26 | 0 | 26 | Odeko, Prenda, Lucid Bots, +23 more | | W20 | 229 | 23 | 0 | 23 | Whatnot, Benepass, Ansa Biotechnologies, +20 more | | S20 | 209 | 29 | 1 | 28 | Pardes Biosciences (PRDS) | | W21 | 336 | 35 | 0 | 35 | Moxion Power Co., Fathom, Lendflow, +32 more | | S21 | 391 | 32 | 0 | 32 | Careerist, Coast, Payhippo, +29 more | | W22 | 398 | 24 | 0 | 24 | Sprites, Cofactr, Fleetzero, +21 more | | S22 | 234 | 15 | 0 | 15 | Cobbery, Vinci Games, Velontra, +12 more | | W23 | 274 | 6 | 0 | 6 | Persist AI, Yuma AI, Radical, +3 more | | S23 | 220 | 5 | 0 | 5 | Corgea, Capi Money, SafetyKit, +2 more | | W24 | 248 | 9 | 0 | 9 | Zep AI, Veles, Healia, +6 more | | S24 | 248 | 5 | 0 | 5 | Voker, autarc, Starcloud, +2 more | | F24 | 94 | 1 | 0 | 1 | Careforce | | W25 | 166 | 3 | 0 | 3 | Orbital Operations, Exin Therapeutics, Solidroad | | Sp25 | 143 | 1 | 0 | 1 | Sygaldry Technologies | | S25 | 166 | 1 | 0 | 1 | Janet AI | | F25 | 146 | 0 | 0 | 0 | — | | W26 | 199 | 1 | 0 | 1 | RunAnywhere | | Sp26 | 196 | 1 | 0 | 1 | Ploy | | S26 | 237 | 0 | 0 | 0 | — | | F26 | 18 | 0 | 0 | 0 | — | | W27 | 1 | 0 | 0 | 0 | — | | Unspecified | 1 | 0 | 0 | 0 | — | | **Total** | **6191** | **556** | **25** | **531** | | Batches with zero confirmed matches are still listed so the directory totals add to 6,191. ## Files - `/workspace/yc-sec/yc-matched-all.json` — flat merged 556, oldest batch first - `/workspace/yc-sec/yc-matched-by-batch.json` — same 556 grouped by batch - `/workspace/yc-sec/yc-mindmap.md` — this file