After much delay, it finally go-time for one of the most-anticipated ASX IPOs this quarter, while an Afterpay-backed investment house will also be vying for attention after securing $100 million.

Li-S Energy (ASX: LIS), due to list Tuesday, is expected to headline this week class of IPO debutants, with the company having developed the Li-S Energy Battery, a lithium-sulphur battery incorporating boron nitride nanotubes (BNNT) as nano-insulators. The company has touted the development as one that overcomes previous problems associated with development in this space. Among the advancements, LIS claims its batteries have higher energy density, thus lasting longer between charges, while The Faraday Institution argues lithium sulphur batteries are safer' than lithium-ion batteries.The company has been spun-off from PPK Group (ASX: PPK), and on the back of $34 million in funding, it is looking to commercialise its patent-pending lithium-sulphur battery technology as a high-performance alternative to lithium-ion batteries. As part of this process, LIS will build a pilot battery production plant and retrofit its technology into products.Elsewhere, a usual chorus of junior explorers will make the ASX their home, including previously-delayed floats from Dalaroo Metals (ASX: DAL) and Koonenberry Gold (ASX: KNB), while Activeport (ASX: ATV) breaks up that theme as the software-defined networking tool provider completes its $15 million IPO.

Upcoming IPOs

MarketCompanyFocusIPO sizeExpected debutASXPacific Edge (PEB)Cancer diagnostics firmDual-listing27 SepASXDalaroo Metals (DAL)Metals explorer$5m28 SepASXKoonenberry Gold (KNB)Gold explorer $10m28 SepASXLi-S Energy (LIS)Lithium-sulphur battery development$34m28 SepASXTouch Ventures (TVL)Investment entity$100m29 SepASXActiveport Group (ATV)Software-defined networking tool$15m30 SepASXMitre Mining (MMC)Gold and base metals explorer$5m30 SepASXC29 Metals (C29)Copper, gold and base metals explorer$5m1 OctASXWest Cobar Metals (WC1)Copper, gold and base metals explorer$5.5m1 OctASXAlvo Minerals (ALV)Copper, zinc, precious metals & lead explorer$10mTBA

USAmplitude (AMPL)Customer behaviour analytics US$1.25bSep 28USWarby Parker (WRBY)Low-cost prescription glasses retailerUS$1.91bSep 29USAllvue Systems (ALVU)Cloud-based software solutions providerUS$275mSep 29USOlaplex (OLPX)Hair-care products supplierUS$1.01bSep 30USFirst Watch (FWRG)Casual-dining restaurant franchiseUS$175mTBC

*All dates are subject to change and should be treated as an indicative guide only

Future Listings

Loyalty and rewards-based platform My Rewards is looking to raise $5 million to $7 million, as it prepares for life as a public company in the coming months. The company, which has been around 25 years and offers white-label rewards programs to a host of blue-chip names, is expected to open its IPO from October, seeking a valuation of up to $40 million.From ashore, US-based company EBR Systems is hoping to list on the ASX if it can secure $110 million and make it to the boards by November. The company produces heart-pacing devices, and has the backing of a number of Australian super funds including Hesta, HostPlus and Australian Super.These developments come as big-name floats loom on the horizon from Ventia, Vocus NZ, which is set to rebrand as Orcon Group, as well as digital bank Judo Bank. They are likely to be joined by competition from New Zealand dairy processing business Fonterra, which is tipped to spin-off its Australian operations into a separate listing, Fonterra Australia, that could command a valuation as high as $2 billion.Meanwhile, just the seven companies submitted initial filings for US IPOs last week. The biggest of these was Hong Kong insurance business FWD Group Holdings, which has more than US$60 billion in assets, and could raise between US$2 billion to US$3 billion. The company operates across 10 markets in Asia and has the backing of billionaire Richard Li.Other hopeful names include payments company Xplor Technologies, water pipeline operator Aris Water Solutions, diagnostic test manufacturer Lucid Diagnostics and air-purification device-maker AeroClean Technologies.