A PSX IPO has several stages: regulators review the draft prospectus, the offer price is set by the method stated for that issue, the public applies through the public-offer process, and successful applicants receive shares while unsuccessful applicants are refunded. Book building, when used, is a price-discovery process for its allocated portion of the offer; the prospectus sets out how it relates to the retail portion. The issue documents control dates, eligibility, application routes and allocation terms.
First, follow the issue—not a generic IPO calendar
The issuer submits its listing application to PSX and prospectus application to SECP at the same time through PRIDE. PSX posts the draft prospectus for five working days of public comments while both regulators review their applications. After comments are addressed, PSX decides the listing application first; if it approves, SECP then conveys its decision on the prospectus application. The final prospectus and related notices set out the offer terms and dates. This sequence is in SECP Regulation 3A. The PSX PRIDE page shows the stages for a real issue, including public comments, PSX and SECP approvals, book-building dates where applicable, public-subscription dates and listing.
Those dates are issue-specific. A calendar entry is not an invitation to apply: use the current prospectus and PSX notice for the issue you are considering.
Book building is one possible pricing method
In book building, bids from eligible participants show demand at different prices and help determine the price under the offer’s stated terms. The book-building and retail portions are distinct parts of an offer, but they do not always happen at separate times: SECP regulations allow the Commission to permit retail subscription while book building is underway. PSX’s joint procedures notice for book building describes the process for eligible participants and NCCPL’s role in their margin money. Check the specific prospectus for the method, participants, price information and dates.
Do not assume that a retail applicant can join the book-building bid, that a bid guarantees an allocation, or that the discovered price alone answers whether the offer suits them. Check the prospectus for the method, eligible participants, price information and the later public-offer terms.
Apply during the public-subscription window
Once the public-subscription window opens, follow the route and payment instructions printed for that issue. PSX’s Electronic IPO System (PES) accepts applications from registered investors directly, or through their TREC Holder or bank where they hold the required account. PES lists 1Link and NIFT payment options. Availability and instructions can differ by issue, so rely on that issue’s prospectus rather than assuming every channel is available each time.
Before submitting anything, check:
- the final prospectus and any later PSX notice;
- the public-subscription dates and closing time;
- whether the offer is fixed-price or includes book building, and who is eligible for each stage;
- the application and payment route, account details and any issue-specific conditions; and
- the company’s disclosures, risks, use of proceeds and allocation terms.
If you are still setting up the basics, see how to start investing in the PSX and what documents a brokerage account needs. The PSX hub links to company information. After shares begin trading, the position-size calculator handles sizing arithmetic only; it does not assess an IPO, forecast a listing price or recommend an application.
What happens after the window closes
PSX’s Chapter 5 subscription rules distinguish successful applications from unsuccessful ones: shares are allotted to accepted, successful applications, and subscription money for unsuccessful applications is refunded. PES also describes automatic credit of shares and any refund to the investor’s respective account. Oversubscription or the issue’s allocation method can mean an application receives fewer shares than requested—or none. Keep the application record and check the allotment and refund through the stated channel.
For each issue, check PSX’s listing information for the date trading begins. The PRIDE page lists separate dates for book building, public subscription and listing. A prospectus is an offer document, not a promise of a return or a guarantee about how the shares will trade.
Check the primary documents
Sources checked 6 October 2026. Confirm the latest issue documents before relying on dates, eligibility or channels.
- PSX Regulations, updated 23 September 2026 — Chapter 5: listing application, public comments, prospectus approval, public subscription, allotment and refunds.
- SECP Public Offering Regulations, 2017, consolidated text updated 6 August 2025 — Regulation 3A covers the review sequence; see also the S.R.O.903(I)/2026 amendment, dated 25 May 2026.
- PSX/NCCPL Joint Procedures for Book Building, PSX/N-1212 — notice dated 7 November 2025 describing the updated book-building framework.
- PSX Electronic IPO System (PES) — registration and public-subscription application instructions.
- PSX PRIDE: Tasdeeq Information Services Limited — an issue-specific example of the public-comment, approval, offer and listing sequence.
Research, not advice. This explains the public-offering process; it does not recommend applying for any IPO. Dates, eligibility and terms are issue-specific—check the latest approved prospectus and PSX notices.