St. Louis Arch Angels is a member-driven angel investor network based in St. Louis, MO, USA that connects accredited investors with early-stage startups primarily in the Midwest, investing capital and mentorship to help ventures scale. 

 Pre-Seed / Seed: Core activity — Arch Angels members back early-stage companies with seed capital (including rounds that traditional VCs often skip).
 Early Institutional: Some members may participate in follow-on financings or co-invest with other institutional capital in later rounds.

 Typical Investment Size (Aggregate): Arch Angels members collectively participate in rounds typically ranging ~$250,000–$750,000 in total for a given startup.
Individual Member Checks: Individual angels within the group usually invest $25,000–$100,000 per transaction, often pooling their participation alongside other members.

• Arch Angels does not publish a fixed equity percentage it always takes — individual ownership is negotiated deal-by-deal between the startup and participating investors.
• In typical angel seed rounds, collective dilution from angel investors in a round (including groups like Arch Angels) frequently falls in the ~10%–25% range of total company equity — shared across all participating investors.
• Individual Arch Angels members’ shares are proportional to their check size relative to total round size; for example, a $50K investor in a $500K total seed round at a given valuation could end up with single-digit percent equity (exact % depends on valuation).
• Because Arch Angels members invest alongside one another under similar terms, they collectively hold a meaningful minority position in the company post-investment (but typically do not control the board unless explicitly negotiated). 

Equity Structure: Investments are negotiated using priced equity or convertible instruments (SAFEs/notes) consistent with early-stage practice; exact terms vary with each deal.

Submission Method: Founders apply via the St. Louis Arch Angels website to bring their startup to the members’ attention; applications are reviewed before being selected for screening and pitch meetings. 
Pitch & Selection: Selected companies present to members at regular meetings; interested angels perform due diligence and negotiate investment terms.

Sector Focus: Broad industry interest including biotech, software, medtech, healthcare IT, life sciences, and emerging technologies.
Geography: Early-stage companies with access or relevance to the St. Louis region ecosystem are prioritized, though compelling opportunities elsewhere may be considered.
Stage: Pre-seed and seed with high growth potential. 
Company Profile: Teams with strong execution ability and potential to scale to $10M+ in annual revenue within several years.

Initial Intake: Startup materials are screened by members or a selection committee. 
 Member Presentation: Founders pitch in front of the angel group. 
 Due Diligence: Interested members form teams to conduct deeper diligence. 
 Investment Terms Negotiation: Equity terms, valuation, and governance rights are negotiated directly between founders and participating members.

Strategic Capital: Angel funding in the $250K–$750K range (collective) to support early growth. 
Mentorship & Network: Active mentoring, board advice, and introductions from experienced business leaders and angels. 
Follow-On Support: Option to participate in later rounds alongside other investors as the company grows.