---
title: "ASF IX Sidecar A, L.P. SEC filings"
url: https://altstreet.investments/edgar/2148910
kind: edgar-entity
updated: 2026-11-02
publisher: AltStreet (https://altstreet.investments)
license: Public factual pages may be read, quoted and cited with attribution and a link. Bulk redistribution is not permitted.
---

# ASF IX Sidecar A, L.P.: SEC filings and what they report

ASF IX Sidecar A, L.P. is a Delaware-organized pooled investment fund vehicle filed under Form D exemptions 506(b) and 3(c), with ASF IX Sidecar GP, LLC and AlpInvest Secondaries IX Lux GP S.à r.l. listed as promoters, indicating this is a sidecar co-investment vehicle tied to an AlpInvest-sponsored secondaries fund program. The filing is pre-open, with total amount sold, investor count, first sale date, and minimum investment all undisclosed, consistent with an initial Form D filing ahead of fundraising activity. No parent platform or related entity family has been matched in AltStreet's database at this time.

| Field | Value |
| --- | --- |
| Entity | ASF IX Sidecar A, L.P. |
| CIK | 2148910 |
| Filing family | 506(b), 3(c) |
| Entity type | co invest |
| Manager (as filed) | AlpInvest |
| Newest fact-bearing filing | October 29, 2026, accession 0000904454-26-000560 |
| Total sold (as reported) | $0 |
| Vintage | 2026 |

## Related persons (Form D Item 3)

| Name | Relationship |
| --- | --- |
| N/A ASF IX SIDECAR GP, LLC | Promoter |
| N/A ALPINVEST SECONDARIES IX LUX GP S.A R.L. | Promoter |


## More

- Entity page (HTML, with events, parties and the platform record): https://altstreet.investments/edgar/2148910
- SEC EDGAR filing index: https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0002148910&owner=include&count=40
- Signal history, evidence passages and the entity graph are AltStreet Terminal features: https://altstreet.investments/terminal

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Source page: https://altstreet.investments/edgar/2148910
Machine index: https://altstreet.investments/llms.txt
AltStreet reads what platforms, funds and issuers file with the SEC and what they tell investors, and publishes the difference. Figures are as filed or as captured on the date stated; nothing here is investment advice.