The following IPOs are expected to price this week:

Alcobra (ADHD), an Israeli drug company developing a non-stimulant ADHD treatment, plans to raise $25 million by offering 2.3 million shares at a price range of $10.00 to $12.00. At the midpoint of the proposed range, Alcobra would command a market value of $113 million. Alcobra was founded in 2008. The Tel Aviv, Israel-based company plans to list on the Nasdaq under the symbol ADHD. Aegis Capital is the lead bookrunner on the deal.

ChannelAdvisor (ECOM), which provides an e-commerce platform to manage sales across multiple online channels, plans to raise $75 million by offering 5.8 million shares at a price range of $12.00 to $14.00. At the midpoint of the proposed range, ChannelAdvisor would command a market value of $288 million. ChannelAdvisor, which was founded in 2001, booked $56 million in sales over the last 12 months. The Morrisville, N.C.-based company plans to list on the NYSE under the symbol ECOM. Goldman Sachs and Stifel are the joint bookrunners on the deal.

Constellium (CSTM), an Apollo/Rio Tinto-backed manufacturer of semi-fabricated aluminum products, plans to raise $400 million by offering 22.2 million shares at a price range of $17.00 to $19.00. At the midpoint of the proposed range, Constellium would command a market value of $1.8 billion. Constellium, which was founded in 2011, booked $4.6 billion in sales over the last 12 months. The Schiphol-Rijk, Netherlands-based company plans to list on the NYSE under the symbol CSTM. Goldman Sachs, Deutsche Bank and JPMorgan are the joint bookrunners on the deal.

Global Brass and Copper Holdings (BRSS), a fabricator and distributor of brass and copper products for various end markets, plans to raise $150 million by offering 9.4 million shares at a price range of $15.00 to $17.00. At the midpoint of the proposed range, Global Brass and Copper Holdings would command a market value of $342 million. Global Brass and Copper Holdings, which was founded in 2007, booked $1.7 billion in sales over the last 12 months. The Schaumburg, Ill.-based company plans to list on the NYSE under the symbol BRSS. Goldman Sachs and Morgan Stanley are the joint bookrunners on the deal.

Ply Gem Holdings (PGEM), a leading manufacturer of exterior building products in the U.S. and Canada, plans to raise $300 million by offering 15.8 million shares at a price range of $18.00 to $20.00. At the midpoint of the proposed range, Ply Gem Holdings would command a market value of $1.3 billion. Ply Gem Holdings, which was founded in 2004, booked $1.1 billion in sales over the last 12 months. The Cary, N.C.-based company plans to list on the NYSE under the symbol PGEM. JPMorgan, Credit Suisse, Goldman Sachs and UBS Investment Bank are the joint bookrunners on the deal.

Portola Pharmaceuticals (PTLA), which is developing a blood thinner and a novel reversal agent for acutely ill patient, plans to raise $100 million by offering 6.9 million shares at a price range of $13.00 to $16.00. At the midpoint of the proposed range, Portola Pharmaceuticals would command a market value of $469 million. Portola Pharmaceuticals, which was founded in 2003, booked $73 million in sales over the last 12 months. The South San Francisco, CA-based company plans to list on the NASDAQ under the symbol PTLA. Morgan Stanley and Credit Suisse are the joint bookrunners on the deal.

NASDAQ