Workday 10% holder plans $18.8M stock sale

A 10% stockholder’s trust has filed to sell 94,089 Workday common shares under Rule 144, following several recent 10b5-1 plan sales.

Rhea-AI Filing Summary

Workday, Inc. (WDAY) has a notice of proposed sale of common stock filed under Rule 144 on behalf of the David A. Duffield Trust U/T/A 7/14/88, identified as a 10% stockholder. The trust plans to sell 94,089 shares of Workday common stock through Morgan Stanley Smith Barney LLC.

The planned sale has an aggregate market value of $18,750,055.92 with an approximate sale date of September 18, 2026, based on 196,000,000 shares outstanding. The notice also lists recent 10b5-1 plan sales, including 96,545 shares for $18,563,624.33 on September 15, 2026, and 100,780 shares for $18,708,920.14 on September 10, 2026.

Key Figures

Shares to be sold under Rule 144: 94,089 shares Aggregate market value of planned sale: $18,750,055.92 Shares outstanding: 196,000,000 shares +3 more

6 metrics

Shares to be sold under Rule 144 94,089 shares Planned sale of Workday common stock by David A. Duffield Trust

Aggregate market value of planned sale $18,750,055.92 Value of 94,089 Workday shares planned to be sold

Shares outstanding 196,000,000 shares Workday common shares outstanding referenced in the notice

10b5-1 sale on September 15, 2026 96,545 shares for $18,563,624.33 Recent Workday common stock sale by the trust

10b5-1 sale on September 10, 2026 100,780 shares for $18,708,920.14 Recent Workday common stock sale by the trust

10b5-1 sale on June 22, 2026 107,500 shares for $12,281,961.00 Earlier Workday common stock sale by the trust

Key Terms

Rule 144, 10b5-1, aggregate market value, 10% Stockholder

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

10b5-1 regulatory

"10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

aggregate market value financial

"Common | Morgan Stanley Smith Barney LLC ... 94089 | 18750055.92 | 196000000"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

10% Stockholder regulatory

"10% Stockholder 144: Securities Information"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing disclose for Workday (WDAY)?

It discloses that the David A. Duffield Trust U/T/A 7/14/88, a 10% stockholder of Workday, plans to sell 94,089 shares of Workday common stock under Rule 144 through Morgan Stanley Smith Barney LLC.

How many Workday (WDAY) shares are planned to be sold and what is the value?

The trust plans to sell 94,089 shares of Workday common stock with an aggregate market value of $18,750,055.92, as stated in the Form 144 notice.

When is the planned Rule 144 sale for Workday (WDAY) shares expected?

The notice states an approximate sale date of September 18, 2026 for the planned Rule 144 sale of 94,089 Workday common shares.

Who is selling Workday (WDAY) shares in this Form 144 and through which broker?

The seller is the David A. Duffield Trust U/T/A 7/14/88. The planned sales are to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services at 1 New York Plaza, New York.

What recent 10b5-1 plan sales of Workday (WDAY) shares are disclosed?

Recent 10b5-1 sales by the trust include 96,545 shares for $18,563,624.33 on September 15, 2026 and 100,780 shares for $18,708,920.14 on September 10, 2026, among several transactions over the prior three months.

How many Workday (WDAY) shares were outstanding as referenced in the Form 144?

The Form 144 references 196,000,000 shares outstanding of Workday common stock in connection with the planned Rule 144 sale.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/18/2026 - 04:19 PM Accepted by SEC EDGAR 09/18/2026 - 04:18 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0000938071
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	WORKDAY, INC.
SEC File Number	001-35680
Address of Issuer	6110 Stoneridge Mall Road Pleasanton CALIFORNIA 94588
Phone	9259519000
Name of Person for Whose Account the Securities are To Be Sold	DAVID A. DUFFIELD TRUST U/T/A 7/14/88
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	10% Stockholder

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	94089	18750055.92	196000000	09/18/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	12/27/2007	Private Placement	Issuer			94089	12/27/2007	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588	Common	09/15/2026	96545	18563624.33
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588	Common	09/10/2026	100780	18708920.14
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588	Common	09/04/2026	90615	17954365.49
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588	Common	09/01/2026	94961	18924540.29
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588	Common	07/09/2026	107500	14699055.50
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588	Common	07/06/2026	107500	14538267.75
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588	Common	06/30/2026	107500	13119171.00
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588	Common	06/25/2026	107500	12426602.25
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588	Common	06/22/2026	107500	12281961.00

144: Remarks and Signature

Remarks
Date of Notice	09/18/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/02/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ David A. Duffield
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)