Pre-seed and seed venture firm
Early-stage venture firm backing outlier founders at pre-seed and seed across AI, crypto, fintech, consumer, enterprise, and infrastructure markets.
San Francisco, United States
548 Market Street, PMB 75231, San Francisco, CA 94104, United States
Haystack's March 2026 Form ADV identifies this as its principal office and place of business, but the PMB designation makes it unsuitable as a visitor-office claim. The map therefore preserves it as a registered regulatory address.
Report correctionMill Valley, United States
16 Miller Avenue, Suite 201, Mill Valley, CA 94941, United States
The same current Form ADV lists this separate office, reports one employee performing investment-advisory functions there, and distinguishes it from the Market Street PMB. That supports an operating-office pin.
Report correctionA quick read based only on the facts recorded in this profile.
Pre-seed and seed venture firm
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Last verified:
Haystack · haystack.vc · primary source
Current earliest-stage strategy, operating model, and firm history.
Accessed
Haystack · haystack.vc · primary source
Current portfolio and direct AI, crypto, fintech, payments, and software relevance.
Accessed
U.S. Securities and Exchange Commission · reports.adviserinfo.sec.gov
Current 2026 legal identity, principal regulatory address, and separate advisory office in Mill Valley.
Accessed
