---
title: "Middlesex SG Sidecar LLC SEC filings"
url: https://altstreet.investments/edgar/2159552
kind: edgar-entity
updated: 2026-10-16
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.
---

# Middlesex SG Sidecar LLC: SEC filings and what they report

Middlesex SG Sidecar LLC is a Delaware-formed entity that filed a Form D for an equity offering under the Rule 506(b) exemption, reporting $10.7M raised from 40 investors with a $250K minimum investment. The filing lists four executive officers (Brian Milberg, David Friedman, Blake Chroman, Zach McHugh) and has not been matched to a known sponsor platform in the AltStreet database.

| Field | Value |
| --- | --- |
| Entity | Middlesex SG Sidecar LLC |
| CIK | 2159552 |
| Filing family | 506(b) |
| Entity type | co invest |
| Manager (as filed) | Middlesex |
| Newest fact-bearing filing | October 14, 2026, accession 0002159552-26-000001 |
| Total offering amount (as filed) | $10,745,000 |
| Total sold (as reported) | $10,745,000 |
| Investors (as reported) | 40 |
| Minimum investment (as filed) | $250,000 |
| Vintage | 2026 |

## Related persons (Form D Item 3)

| Name | Relationship |
| --- | --- |
| Brian Milberg | Executive Officer |
| David Friedman | Executive Officer |
| Blake Chroman | Executive Officer |
| Zach McHugh | Executive Officer |


## Filings (1 on record, newest first)

| Date | Form | Family | SEC link |
| --- | --- | --- | --- |
| October 14, 2026 | D | Form D | https://www.sec.gov/Archives/edgar/data/2159552/000215955226000001/ |


## More

- Entity page (HTML, with events, parties and the platform record): https://altstreet.investments/edgar/2159552
- SEC EDGAR filing index: https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0002159552&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/2159552
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.