S-4MEF registration statements under Rule 462(b)
S-4MEF: a Rule 462(b) registration adding securities to an effective Form S-4 in a merger or exchange offer.
curl -H "Authorization: Bearer $SECFEED_KEY" \ "https://secfeedapi.com/v1/filings?query=formType:%22S-4MEF%22&size=2"
import os, requests
r = requests.get(
"https://secfeedapi.com/v1/filings",
params={'query': 'formType:"S-4MEF"', 'size': '2'},
headers={"Authorization": f"Bearer {os.environ['SECFEED_KEY']}"},
)
print(r.json())What is S-4MEF?
S-4MEF is the Form S-4 version of the Rule 462(b) short form registration, used to register a limited additional amount of securities for a business combination or exchange offer already registered on S-4.
It often appears when an exchange offer is extended or more securities are needed because of share count changes.
Issuers with an effective Form S-4.
Before the additional securities are issued; effective on filing.
Filings per year
Every S-4MEF filing on EDGAR, counted from the SecFeed index. Updated daily.
What is inside
| Section | Contents |
|---|---|
| Reference to earlier S-4 | Incorporated by reference. |
| Fee table | Fees for the additional securities. |
Get S-4MEF data with SecFeed
Search the filings with formType:"S-4MEF", read any document as text or PDF, and use these APIs for structured data:
Latest S-4MEF filings
| Company | Form | Filed | |
|---|---|---|---|
| Sysco Holdings Corp | S-4MEF | 2026-10-06 | EDGAR ↗ |
| SOUNDHOUND AI, INC. | S-4MEF | 2026-09-04 | EDGAR ↗ |
| BLACKBOXSTOCKS INC. | S-4MEF | 2026-02-24 | EDGAR ↗ |
| atai Life Sciences Luxembourg S.A. | S-4MEF | 2025-12-29 | EDGAR ↗ |
| COMMERCE BANCSHARES INC /MO/ | S-4MEF | 2025-12-03 | EDGAR ↗ |
| Apollo Global Management, Inc. | S-4MEF | 2025-09-02 | EDGAR ↗ |
| SEE ID, Inc. | S-4MEF | 2025-03-27 | EDGAR ↗ |
| CHOICEONE FINANCIAL SERVICES INC | S-4MEF | 2025-02-21 | EDGAR ↗ |
Use cases
- Track exchange offers and mergers needing more registered shares
Related forms
Every Form S-4 since 1994: registration of securities issued in mergers, acquisitions and exchange offers, often a joint proxy statement prospectus.
S-1MEFS-1 upsize (Rule 462(b))S-1MEF: a short registration statement filed under Rule 462(b) to add securities to an effective Form S-1, usually to upsize an IPO at pricing.
FAQ
Why file an S-4MEF?
To register a limited amount of extra securities for a merger or exchange offer already registered on S-4.
Is it effective immediately?
Yes, Rule 462(b) registrations are effective on filing.
Every S-4MEF filing, one API call away
500 free calls a month. JSON, CSV, PDF and a Python SDK.