# YC Form D / D/A sweep — 24 Aug 2026 Retrieved **Monday 24 Aug 2026, 3:22 PM MT** (America/Denver, UTC-6). SEC User-Agent: `YC-SEC-Research/1.0 (research@example.com; EDGAR Form D matching for YC portfolio)`. Sources: [EFTS search-index](https://efts.sec.gov/LATEST/search-index), Form D `primary_doc.xml` on EDGAR, [data.sec.gov submissions](https://data.sec.gov/submissions/). No CIKs were invented. The 25 companies already in `yc-public-filings.json` were not re-done. The prior 492 extra Form D matches were kept. --- ## Counts | Result | Count | |---|---| | Form D / D/A filings that **name YC (or a first-party YC fund/GP) as a related person** | **29** | | Unique issuers in that set | **18** (all first-party YC funds) | | Portfolio-company issuers in that set | **0** | | Extra YC directory companies matched to a Form D CIK | **531** (47 of them `top_company`; 492 prior + **39 new this pass**) | | Remaining `top_company` names searched and still unmatched | **22** (no high-confidence Form D legal-name hit) | | Directory companies searched | **2,801** of 6,191 (pass 1: 1,251; pass 2: +1,000; pass 3: +550 never-searched Active distinctive names) | | Unsearched directory companies | **3,365** | **Related-person date range:** 2015-06-15 → 2026-04-27 **Extra portfolio Form D date range:** 2009-10-20 → 2026-08-19 Coverage file: `yc-edgar-coverage.json` `matched_public` 25 + `matched_form_d` 531 = **556** directory companies with a confirmed SEC CIK. --- ## 1. Related-person sweep (complete; unchanged) EFTS was paginated for `"Y Combinator"`, `"YC Continuity"`, `"Y Combinator Management"`, `"YC Fund"`, the token `Combinator`, and every first-party fund legal name from `yc-entities.json`, forms **D** and **D/A**, 2008-01-01 through 2026-08-24. - 82 unique Form D / D/A accessions. All 82 `primary_doc.xml` files were fetched and parsed. - **29** filings list a YC-named related person (promoter / GP / managing member), or the issuer CIK is a confirmed first-party YC fund. - Those 29 filings are **YC’s own fund vehicles**, not portfolio companies. - **Zero** YC directory company is the issuer on a Form D that lists Y Combinator / a YC fund as a related person. ### Examples (real SEC URLs) - **Y COMBINATOR CONTINUITY FUND I, L.P.** (CIK 0001645142), Form D 2015-06-15. Related person: `YC CONTINUITY MANAGEMENT I, LLC` (Promoter — General Partner). https://www.sec.gov/Archives/edgar/data/1645142/000164514215000001/0001645142-15-000001-index.html - **YC II, L.P.** (CIK 0001723360), Form D 2017-11-29. Related person: `YC GP II, LLC` (Promoter). https://www.sec.gov/Archives/edgar/data/1723360/000172336017000001/0001723360-17-000001-index.html - **Y Combinator ES26, LLC** (CIK 0002131827), Form D 2026-04-27. Related person: `YC Batch26, L.P.` (Promoter — managing member). https://www.sec.gov/Archives/edgar/data/2131827/000131586326000366/0001315863-26-000366-index.html --- ## 2. Extra portfolio Form D CIKs Primary method: EFTS phrase search `q="Name, Inc."` (and distinctive former names / known legal-name aliases) restricted to form D, plus `keysTyped` entity lookup for remaining tops, then confirm the legal name (or former names) on `data.sec.gov/submissions`. Entity autocomplete is incomplete — Mixpanel, Fivetran, Webflow, Scale AI, Brex return zero entities — so it was not trusted as the only source. ### Pass 3 (this run) - Re-searched the **29** still-unmatched `top_company` names with more legal-name aliases (`Addmired` / Machine Zone, `JN Projects` / HelloSign, `Ryzac` / Codecademy, `Athletic Media Co` / The Athletic, `Financial Insight Technology` / SmartAsset, `Chime Inc.` / Sendwave, `FutureAdvisor, Inc.`, Segment.com / Twilio Segment, Dropbox Sign, Clipboard Health / Twomagnets, MessageBird, KiranaKart / Zepto, Scale AI Inc, Brex Inc, Webflow Inc, Mixpanel Inc, Fivetran Inc, etc.). - Then searched **550** never-before-searched Active companies with distinctive names (Active team_size 5–9 essentially complete; into Active team_size 4). Tiny generic one-word names (Ace, Beam, Pulse, …) were skipped unless a former name made them unique. - Raw hits were confirmed on `data.sec.gov/submissions`. **6** dropped as location/brand collisions (Upstream LLC in Roanoke TX ≠ Paris inbox Upstream; CHORUS LLC Marlborough MA ≠ SF Chorus Sleep; Relay, Inc. Raleigh ≠ SLC Relay Health; Atana Baltimore ≠ NYC Operator.io; EVIDENCE INC Santa Monica ≠ Toronto Evidence.dev; Treeline SF 2024 ≠ Austin Sails Co W15). Forge Rewards → Unity Biotechnology was dropped again. - **39** new high-confidence extras appended. Prior **492** left untouched. - **7** of the 39 are previously unmatched `top_company` names. ### New top-company matches this pass | YC company | Batch | SEC legal name | CIK | Form Ds | Example | |---|---|---|---|---|---| | Machine Zone | W08 | Addmired Inc. | 0001537968 | 2 | [2012-04-09](https://www.sec.gov/Archives/edgar/data/1537968/000153796812000001/0001537968-12-000001-index.html) | | FutureAdvisor | S10 | FutureAdvisor, Inc. | 0001556846 | 2 | [2014-05-28](https://www.sec.gov/Archives/edgar/data/1556846/000155684614000001/0001556846-14-000001-index.html) | | HelloSign | W11 | JN Projects, Inc. | 0001709291 | 1 | [2017-06-14](https://www.sec.gov/Archives/edgar/data/1709291/000170929117000001/0001709291-17-000001-index.html) | | Codecademy | S11 | Ryzac, Inc. | 0001534285 | 2 | [2021-04-20](https://www.sec.gov/Archives/edgar/data/1534285/000153428521000005/0001534285-21-000005-index.html) | | Sendwave | W12 | Chime Inc. | 0001625286 | 2 | [2016-05-27](https://www.sec.gov/Archives/edgar/data/1625286/000162528616000001/0001625286-16-000001-index.html) | | SmartAsset | S12 | Financial Insight Technology, Inc. | 0001550430 | 6 | [2021-08-19](https://www.sec.gov/Archives/edgar/data/1550430/000123191921000073/0001231919-21-000073-index.html) | | The Athletic | S16 | Athletic Media Co | 0001758687 | 3 | [2020-01-27](https://www.sec.gov/Archives/edgar/data/1758687/000175868720000002/0001758687-20-000002-index.html) | Machine Zone was confirmed via Addmired Form D related person Gabriel Leydon (Palo Alto; incorporated 2008). HelloSign is JN Projects, Inc. d/b/a HelloSign (Dropbox 8-K; founders Joseph Walla + Neal O'Mara). Codecademy is Ryzac, Inc. d/b/a Codecademy (Skillsoft 8-K; founders Zachary Sims + Ryan Bubinski). Sendwave filed as Chime Inc. with founders Drew Durbin + Lincoln Quirk (not the Chime bank). SmartAsset Form D related-person address is `c/o SmartAsset` (founder Michael Carvin). The Athletic is Athletic Media Co (founders Alex Mather + Adam Hansmann). ### Honest zeros (still no Form D CIK) Mixpanel, Fivetran, Webflow, Scale AI, Brex, Segment (Segment.io / Segment.com / Twilio Segment), Clipboard Health / Twomagnets, MessageBird / Bird, Zepto / KiranaKart — re-queried live via `keysTyped` and `"Name, Inc."` Form D search. **Zero** entity hits and **zero** Form D display-name hits. A zero here is not “not a YC company”; many never file US Form D (foreign HoldCo, no Reg D offering, or they file under a name we do not have). Also still unmatched after this pass: Fivestars, North / Thalmic Labs, Cognito / BlockScore, Go1, Caper / QueueHop, NURX, Proxy, Modern Fertility, Bear Flag Robotics, Newfront / Abe Labs, Sqreen, Honeylove, Nowports. ### Other example extras (pass 3 Active) | YC company | Batch | SEC legal name | CIK | Example | |---|---|---|---|---| | Guide Labs | W24 | Guide Labs Inc. | 0002026937 | [2024-06-21](https://www.sec.gov/Archives/edgar/data/2026937/000202693724000001/0002026937-24-000001-index.html) | | Janet AI | S25 | Janet AI, Inc. | 0002147912 | [2026-07-31](https://www.sec.gov/Archives/edgar/data/2147912/000214791226000001/0002147912-26-000001-index.html) | | Maple Materials | W19 | Maple Materials, Inc. (fka Saratoga Energy) | 0001767915 | [2024](https://www.sec.gov/Archives/edgar/data/1767915/000176791524000002/0001767915-24-000002-index.html) | | Markhor | S15 | Atoms, Inc. | 0001774157 | [2019-09-03](https://www.sec.gov/Archives/edgar/data/1774157/000177415719000001/0001774157-19-000001-index.html) | | Simbie AI | S23 | Peerwise Medical, Corp. | 0002137912 | [2026-06-02](https://www.sec.gov/Archives/edgar/data/2137912/000213791226000001/0002137912-26-000001-index.html) | Browse any of them at `https://www.sec.gov/edgar/browse/?CIK=`. --- ## Coverage (honest) - Matching all **6,191** directory companies one-by-one was not done. Combined passes searched **2,801** names (all remaining tops + Growth + Active team_size ≥ 50 + 1,000 Active in pass 2 + 550 never-searched distinctive Active in pass 3). - **3,365** directory companies remain unsearched (mostly Inactive / Acquired Early-stage, and Active with tiny or generic names skipped as collision-prone, plus remaining Active team_size ≤ 4 not reached this pass). - The related-person sweep **is** complete for the requested phrases + known first-party fund names. - YC as a related person on **portfolio** Form Ds is essentially absent from EDGAR full-text. The useful set is (a) YC’s own 29 fund notices, plus (b) portfolio-issuer Form Ds matched by legal name: 531 extra here and 25 already in the public file. - Short-brand matches that survived year-alignment remain the weakest rows; use the example filing URL before treating them as definitive. - Alias matches that do not share a core with the YC brand (HelloSign → JN Projects; Codecademy → Ryzac; Machine Zone → Addmired; SmartAsset → Financial Insight Technology; Sendwave → Chime Inc.; The Athletic → Athletic Media Co) were kept only after submissions / related-person / former-name confirmation. - Former-name or short-brand hits whose current SEC name / address is a well-known different company were dropped (Unity Biotechnology/Forge; Upstream LLC Texas; CHORUS LLC Massachusetts; Relay Raleigh; Atana Baltimore; EVIDENCE INC Santa Monica; Treeline SF). ## Output files - `yc-form-d-related.json` — 29 related-person filings + 53 document-mention-only rows (unchanged) - `yc-form-d-portfolio.json` — **531** extra directory → Form D CIK matches (492 prior + 39 new; deduped against the public 25) - `yc-edgar-coverage.json` — totals, searched / unsearched, remaining unmatched tops - `yc-form-d-summary.md` — this file