Form D · Venture Capital Fund

SPX Fund III, a series of Altra FrontierTech Investments I, LP

New York, NY · CIK 0002105192

Offering snapshot reported Jan 21, 2026 · SEC filing

Reported sold
$5.52M
Offering amount: $5.52M
Investors reported
109
Form D · investor count
Minimum accepted
$0
Reported outside-investor minimum
First sale
Jan 15, 2026
As reported in this filing

What changed?

Latest filing versus its linked predecessor, where available.

No comparable changes in the displayed metrics.

Filing history

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FiledFiling typeReported soldChange vs linked filingInvestorsSource
Jan 21, 2026Initial$5,520,010No comparison109SEC filing

Offering details

Securities
Pooled investment fund
Exemptions
06b, 3C, 3C.7
Duration over one year
No
Business combination
No
Sales commissions
$0
Finders' fees
$0
Form D file number
021-570529

Source: Form D, filed Jan 21, 2026. Minimum accepted may differ from a standard advertised minimum.

Fund connections

No confirmed ADV fund connection is available for this issuer.

People & organizations

Current and past Form D appearances. These existing records do not establish a person's current role or uniquely identify them across issuers.

People and organizations reported in Form D filings
NameReported role
N/A Altra Frontier Tech Investments Gp Llc Director
Jamie Melzer Executive

Issuer details

Industry: Pooled Investment Fund (See others in industry)

Address:
459 Columbus Avenue, Suite #502
New York, NY, 10024