SEPTInvestingStart Free

MOS 424B5: Secondary offering

Filed with the SEC on · accession 0001193125-26-347026

MOS filed a 424B5 (prospectus (offering)) with the SEC on Aug 12, 2026. The final terms of an offering of shares or bonds. The stock moved -2.2% by the first close after the filing.

Summary of the filing

Mosaic Co. is offering $2 billion in senior notes across three tranches: $1 billion of 5.350% notes due 2031, $500 million of 5.650% notes due 2034, and $500 million of 5.900% notes due 2036, with proceeds used for general corporate purposes.

For details, click here →How to read a 424B5 →

Key details

Total offering amount$2.0B
2031 notes principal$1.0B
2034 notes principal$500.0M
2036 notes principal$500.0M
IssuerMosaic Co.
UnderwriterCitigroup
UnderwriterBofA Securities
UnderwriterJ.P. Morgan
UnderwriterWells Fargo Securities

How MOS stock reacted

Close before

$23.10

Aug 11, 2026

First close after

-2.16%

$22.60

5 trading days

-8.48%

$21.14

Since filing

-3.20%

$22.36

✦ Ask GOAX AI about this filing — what it means for MOS, what changed since its last filings and what to watch next.

Try it free for 7 days

🔔 Want to stay updated on new SEC filings for MOS?

Click here

Frequently asked questions

What did MOS file with the SEC on Aug 12, 2026?

MOS filed a 424B5 (Secondary offering). Mosaic Co. is offering $2 billion in senior notes across three tranches: $1 billion of 5.350% notes due 2031, $500 million of 5.650% notes due 2034, and $500 million of 5.900% notes due 2036, with proceeds used for general corporate purposes.

What does a secondary offering mean for MOS stock?

New shares dilute existing holders and are often sold at a discount to the market price.

How do I read a 424B5?

The final terms of an offering of shares or bonds. Look at price, number of shares and the discount to the market price. Large offerings dilute existing shareholders.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 424B5 (prospectus (offering)): The final terms of an offering of shares or bonds.

How did MOS stock react to this filing?

MOS closed at $23.10 before the filing and $22.60 on Aug 12, 2026 (-2.16%). Five trading days later: $21.14 (-8.48%).

Other MOS SEC filings

Get alerts when MOS files with the SEC, plus live charts, key levels and news for 13,000+ stocks.

Try SEPT free for 7 days
MOS overviewMOS analysisMOS newsLatest SEC filings