SEC filing record
Primary Source · SEC.gov

ASF IX Sidecar, L.P.

Co-Investment Vehicle2026 vintage506(b), 3(c)

Raised

Pre-open

Investors

—

Min Invest

None stated

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AltStreet Analysis

·

Generated from EDGAR primary sources

ASF IX Sidecar, L.P. is a Delaware-organized pooled investment fund filed as a new Form D by its promoters, ASF IX Sidecar GP, LLC and AlpInvest Secondaries IX Lux GP S.à r.l., indicating it functions as a co-investment/sidecar vehicle alongside AlpInvest's Secondaries Fund IX program. The filing is pre-open with no disclosed capital raised, investor count, or first sale date, and relies on the standard 506(b)/3(c) exemption pairing used for private institutional funds.

This filing sits within the institutional secondaries/private-equity sidecar segment of alternative investments, using the common 506(b) private-placement exemption combined with the 3(c) Investment Company Act exclusion typical of unregistered pooled funds. No minimum investment is disclosed on the form, which is standard for institutional vehicles where subscription terms are set in the LPA rather than the public Form D.

Data Flags

First Sale Date / Total Amount SoldFiling is pre-open with no first sale date or amount raised disclosed, consistent with a newly formed fund vehicle that has not yet closed its initial tranche.

EDGAR Filing Data

Form D — Primary Source

View on SEC.gov
CIK Number0002148828
Entity NameASF IX Sidecar, L.P.
Exemption506(b), 3(c)
Entity Type—
Jurisdiction of OrganizationDelaware
Issuer AddressC/O Alpinvest Us Holdings, LLC, One Vanderbilt Avenue, Suite 3400, New York, NY 10017
Phone(646) 735-4293
Industry / Fund Type—
Securities TypePooled Investment Fund
First Sale Date—
Filing DateOctober 29, 2026
Accession Number0000904454-26-000561
Total Offering Amount—
Total Amount Sold—
Total Investors—
Minimum Investment$0 (no stated minimum)
Offering Duration—
State (Issuer Address)NY
Amendment CountOriginal filing only

Related Persons (Form D)

Executive officers, directors, and promoters listed on the SEC Form D filing. Source: SEC.gov.

N/A ASF IX SIDECAR GP, LLC

Promoter · NEW YORK, NY

N/A ALPINVEST SECONDARIES IX LUX GP S.A R.L.

Promoter · AMSTERDAM, P7

Questions About ASF IX Sidecar, L.P.

Each answer is built from the values on the SEC filing and the AltStreet ledger, not from the issuer's marketing.

What is ASF IX Sidecar, L.P.?

ASF IX Sidecar, L.P. is an issuer that filed a Form D with the SEC on October 29, 2026. The filing claims 506(b), 3(c).

Is ASF IX Sidecar, L.P. legit?

AltStreet does not rate legitimacy; it reports the public record. ASF IX Sidecar, L.P. filed a Form D with the SEC on October 29, 2026 claiming 506(b), 3(c). A Form D is a notice of an exempt offering, not a review or approval of it. AltStreet's enforcement record (SEC, FINRA and state actions) shows no action naming the issuer as of today. Before investing, confirm the filing on EDGAR, check the seller's registration on FINRA BrokerCheck, and read the offering documents, which a Form D does not include.

Is ASF IX Sidecar, L.P. registered with or approved by the SEC?

No. A Form D is a notice that an issuer is selling securities under an exemption from registration, and the SEC does not review, approve, or pass on the merits of the offering. The filing shows that ASF IX Sidecar, L.P. claimed 506(b), 3(c) and disclosed the items the form requires, such as the amount sold, the minimum investment, related persons, and anyone paid to sell the securities. It does not verify the issuer's claims or its business.

How much has ASF IX Sidecar, L.P. raised?

ASF IX Sidecar, L.P. reported no amount sold as of the Form D filed October 29, 2026.

Who is selling ASF IX Sidecar, L.P. and how are they paid?

The Form D names no recipient of sales compensation, which usually means the issuer or its affiliates are placing the securities directly.

Where is ASF IX Sidecar, L.P. located?

The issuer's address on its SEC filings is C/O Alpinvest Us Holdings, LLC, One Vanderbilt Avenue, Suite 3400, New York, NY 10017. Its phone number of record is 646-735-4293. It is organized under the laws of Delaware.

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Data Methodology

Capital raise figures, investor counts, and filing dates are sourced directly from SEC EDGAR Form D primary documents via the SEC EDGAR submissions API and full-text search index. EDGAR entity profiles and deal-level data are reviewed by AltStreet analysts with backgrounds in corporate finance and securities law — cross-referenced against offering circulars, audited financial statements, and primary regulatory filings before publication. Platform-provided information, where present, is clearly labeled and does not affect EDGAR data or AltStreet editorial coverage. Platforms may request factual corrections for demonstrable inaccuracies by contacting [email protected]. This page does not constitute investment advice.