Rainmaker Securities · Member FINRA / SIPC
Managing Director
Rainmaker Securities, LLC
Specialist in late-stage private securities and pre-IPO secondary market transactions. Helping shareholders, founders, and investors unlock liquidity — without waiting for an IPO.
About
I am a Managing Director at Rainmaker Securities, one of the most experienced firms in the late-stage private and pre-IPO secondary marketplace. I specialize in connecting shareholders who want liquidity with qualified buyers who want access to the most sought-after private companies in the world.
Rainmaker was founded in 2004 and launched its late-stage private practice in 2010. With a global team across Miami, New York, Los Angeles, San Francisco, Chicago, Dubai, Hong Kong, and beyond, we bring unmatched reach and expertise to every transaction.
Whether you are a tech employee holding options in a company that has delayed its IPO, an early investor seeking distributions, or a high net worth individual looking for pre-IPO exposure — I am here to help you navigate the private secondary market with clarity and confidence.
Credentials
Rainmaker Securities, LLC
Member FINRA / SIPC — fully registered broker-dealer
Direct line
561-344-2317 (calls only)
Email
dreinikainen@rainmakersecurities.com
Global presence
Miami · New York · Los Angeles · San Francisco · Chicago · Dubai · Hong Kong
What I do
I work with both buyers and sellers across the full spectrum of late-stage private securities, capital raises, and M&A transactions. Every situation is different — I bring the expertise, relationships, and market data to structure transactions that work for all parties.
Facilitating the purchase and sale of shares in late-stage private companies — from initial buyer and seller matching through to closed transaction.
Helping employees, founders, and early investors unlock value from their private company equity — without waiting years for an IPO or acquisition.
Providing accredited investors, family offices, and institutions with access to pre-IPO shares in the most in-demand late-stage private companies.
Supporting emerging growth companies in raising private capital — from document preparation and enterprise valuation through to investor distribution and closing.
Providing buy-side and sell-side M&A transaction support for mid-market companies — from target identification and valuation through to negotiation and closing.
The opportunity
The median time from startup founding to IPO has nearly doubled — from 6.5 years in the 1990s to 12 years today. Shareholders cannot afford to wait indefinitely.
There are now 1,344 unicorn companies globally — up from just 142 in 2015. The wealth being created in private markets has never been greater, but access remains limited.
Institutional investors, family offices, and high net worth individuals are actively seeking exposure to late-stage private companies. Demand for top names far outpaces supply.
Secondary investors enter after the early negative return period, investing in companies with proven business models and clear paths to liquidity — reducing risk while preserving upside.
Get in touch
Whether you are exploring liquidity options for private company equity, looking for pre-IPO investment opportunities, or simply want to understand what the secondary market looks like right now — I am happy to have a no-obligation conversation.
Direct line
561-344-2317 (calls only)
Send a message
Disclosures
DISCLOSURE: Rainmaker Securities, LLC ("RMS") is a FINRA registered broker-dealer and SIPC member. Find this broker-dealer and its agents on BrokerCheck. Our relationship summary can be found on the RMS website.
RMS is engaged by its clients to make referrals to buyers or sellers of private securities ("Securities"). If such client closes a Securities transaction with a buyer or seller so referred, RMS is entitled to a success fee from the client. Such success fee may be in the form of cash or in warrants to purchase securities of the client or client's affiliate. RMS or RMS representatives may hold equity in its issuer clients or in the issuers of securities purchased or sold by the parties to a transaction.
This communication is confidential and is addressed only to its intended recipient. This communication does not represent an offer or solicitation to buy or sell Securities. Such an offer must be made via definitive legal documentation by the seller of securities.
Investments in the Securities are speculative and involve a high degree of risk. An investor in the Securities should have little to no need for liquidity in the foreseeable future and have sufficient finances to withstand the loss of the entire investment.
RMS does not recommend the purchase or sale of Securities. Potential buyers or sellers of the Securities should seek professional counsel prior to entering into any transaction.