SEPTInvestingStart Free

CIFR SCHEDULE 13G: SEC filing

Citadel Advisors LLC and affiliated entities

Filed with the SEC on · accession 0001104659-26-117904

CIFR filed a SCHEDULE 13G (schedule 13g) with the SEC on Oct 21, 2026. A report the company filed with the SEC (the US market regulator). The stock moved +2.8% by the first close after the filing.

Summary of the filing

Citadel Advisors LLC and affiliated entities filed a Schedule 13G indicating a passive ownership position in Cipher Digital Inc. (CIFR), with a joint filing agreement executed on October 21, 2026.

For details, click here →

Key details

FilerCitadel Advisors LLC
FilerCitadel Securities LLC
Subject companyCipher Digital Inc.
Founder/principal of citadelKenneth Griffin
Authorized signatorySeth Levy

How CIFR stock reacted

Close before

$8.88

Oct 20, 2026

First close after

+2.82%

$9.13

5 trading days

-4.50%

$8.48

Since filing

-26.30%

$6.54

✦ Ask GOAX AI about this filing — what it means for CIFR, 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 CIFR?

Click here

Frequently asked questions

What did CIFR file with the SEC on Oct 21, 2026?

CIFR filed a SCHEDULE 13G (SEC filing). Citadel Advisors LLC and affiliated entities filed a Schedule 13G indicating a passive ownership position in Cipher Digital Inc. (CIFR), with a joint filing agreement executed on October 21, 2026.

How do I read a SCHEDULE 13G?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

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 SCHEDULE 13G (schedule 13g): A report the company filed with the SEC (the US market regulator).

How did CIFR stock react to this filing?

CIFR closed at $8.88 before the filing and $9.13 on Oct 21, 2026 (+2.82%). Five trading days later: $8.48 (-4.50%).

Other CIFR SEC filings

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

Try SEPT free for 7 days
CIFR overviewCIFR analysisCIFR newsLatest SEC filings