A PIPE is a private placement of newly issued stock (and often warrants) to accredited investors, executed outside a public offering. The company gets cash in days; investors get a discounted block and typically resale registration rights.
Typical structure
Common shares (or convertible preferred) at a 5–15% discount to the recent close, bundled with warrants for 50–100% coverage struck at or above the deal price. A $20M PIPE on a $5 stock might price at $4.50 with full warrant coverage at $5.
The deal is disclosed in an 8-K within four business days and the resale registration is filed shortly after on an S-3 or S-1.
Why they hit the chart
The deal price sets a new reference. The stock typically gaps down to or below the PIPE price the next morning as PIPE investors start hedging — selling the underlying or shorting against the warrant package.
Reading the 8-K
Three numbers: cash raised, share/warrant count issued, and effective price per share including warrants. Effective price = cash raised ÷ (shares + warrants × Black-Scholes value). That's the real cost of capital.
When PIPEs are bullish
Healthcare and tech PIPEs led by recognized institutional funds (Baker Bros, RA Capital, etc.) at small discounts can be net bullish — they signal validation and runway. PIPEs led by specialty finance shops on micro-cap shells almost never are.