Notice of Proposed Sale · 144

Workday, Inc.

WDAYNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Oct 1, 2026Accepted Oct 1, 2026, 4:25 PM EDTFiling CIK 1327811Accession 0001950047-26-009957

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Structured filing — 144

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: WORKDAY INC
Issuer CIK: 0001327811
SEC file number: 001-35680
Phone: 9259519000
Person for whose account securities are to be sold: DAVID A. DUFFIELD TRUST U/T/A 7/14/88
Relationships to issuer: 10% Stockholder
Street: 6110 Stoneridge Mall Road
City: Pleasanton
State / country code: CA
Postal code: 94588

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
Common	98,446	18,750,025.16	196,000,000	10/01/2026	NASDAQ	Morgan Stanley Smith Barney LLC Executive Financial Services

Broker / market maker — proposed row 1, entry 1

Name: Morgan Stanley Smith Barney LLC Executive Financial Services
Street: 1 New York Plaza
Street (continued): 8th Floor
City: New York
State / country code: NY
Postal code: 10004

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
Common	12/27/2007	Private Placement	Issuer	98,446	N	12/27/2007	Cash

Sales reported in the preceding three months

Sales reported in the preceding three months · 9 reported rows
Seller	Security	Sale date	Amount sold	Gross proceeds
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88	Common	09/28/2026	98,971	18,661,308.65
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88	Common	09/23/2026	99,613	19,139,641.82
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88	Common	09/18/2026	94,089	18,318,300.32
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88	Common	09/15/2026	96,545	18,563,624.33
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88	Common	09/10/2026	100,780	18,708,920.14
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88	Common	09/04/2026	90,615	17,954,365.49
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88	Common	09/01/2026	94,961	18,924,540.29
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88	Common	07/09/2026	107,500	14,699,055.50
10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88	Common	07/06/2026	107,500	14,538,267.75

Seller — prior-sale row 1, entry 1

Name: 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88
Street: 6110 Stoneridge Mall Road
City: Pleasanton
State / country code: CA
Postal code: 94588

Seller — prior-sale row 2, entry 1

Name: 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88
Street: 6110 Stoneridge Mall Road
City: Pleasanton
State / country code: CA
Postal code: 94588

Seller — prior-sale row 3, entry 1

Name: 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88
Street: 6110 Stoneridge Mall Road
City: Pleasanton
State / country code: CA
Postal code: 94588

Seller — prior-sale row 4, entry 1

Name: 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88
Street: 6110 Stoneridge Mall Road
City: Pleasanton
State / country code: CA
Postal code: 94588

Seller — prior-sale row 5, entry 1

Name: 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88
Street: 6110 Stoneridge Mall Road
City: Pleasanton
State / country code: CA
Postal code: 94588

Seller — prior-sale row 6, entry 1

Name: 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88
Street: 6110 Stoneridge Mall Road
City: Pleasanton
State / country code: CA
Postal code: 94588

Seller — prior-sale row 7, entry 1

Name: 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88
Street: 6110 Stoneridge Mall Road
City: Pleasanton
State / country code: CA
Postal code: 94588

Seller — prior-sale row 8, entry 1

Name: 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88
Street: 6110 Stoneridge Mall Road
City: Pleasanton
State / country code: CA
Postal code: 94588

Seller — prior-sale row 9, entry 1

Name: 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88
Street: 6110 Stoneridge Mall Road
City: Pleasanton
State / country code: CA
Postal code: 94588

Prior-sale reporting

Nothing to report for the preceding three months: N

Notice signature

Notice date: 10/01/2026
Signed: /s/ David A. Duffield
Plan adoption dates: 12/02/2025

Company context

Workday is the enterprise AI platform for managing people, money, and agents. Workday unifies HR and finance on one intelligent platform with AI at the core to empower people at every level with the clarity, confidence, and insights they need to adapt quickly, make better decisions, and deliver outcomes that matter. Workday is used by more than 11,000 organizations around the world and across industries - from medium-sized businesses to more than 65% of the Fortune 500. For more information about Workday, visit workday.com.

Current securities

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