David A. Duffield

CIK: 0000938071

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)444 (87.2%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)0 (0.0%)

Compensation grants

Other (G, F, J, C, D, …)65 (12.8%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

WDAY

Workday, Inc.

10% Owner

Discretionary Trading P&L

Holdings

Transaction History (509 total)

WDAY
Workday, Inc.
Oct 9, 2026
Sale(S)
Direct
46.6K shares at avg. $186.36$8.7M
WDAY
Workday, Inc.
Oct 9, 2026
Sale(S)
Direct
14.3K shares at avg. $186.92$2.7M
WDAY
Workday, Inc.
Oct 9, 2026
Sale(S)
Direct
14.2K shares at avg. $188.19$2.7M
WDAY
Workday, Inc.
Oct 9, 2026
Sale(S)
Direct
10.5K shares at avg. $190.13$2.0M
WDAY
Workday, Inc.
Oct 9, 2026
Conversion(C)
Direct
99.8K shares-
WDAY
Workday, Inc.
Oct 9, 2026
Sale(S)
Direct
1.5K shares at avg. $190.96$287K
WDAY
Workday, Inc.
Oct 9, 2026
Sale(S)
Direct
12.7K shares at avg. $189.36$2.4M
WDAY
Workday, Inc.
Oct 6, 2026
Sale(S)
Direct
10.1K shares at avg. $187.77$1.9M
WDAY
Workday, Inc.
Oct 6, 2026
Sale(S)
Direct
19.5K shares at avg. $188.64$3.7M
WDAY
Workday, Inc.
Oct 6, 2026
Sale(S)
Direct
10.3K shares at avg. $185.86$1.9M
WDAY
Workday, Inc.
Oct 6, 2026
Conversion(C)
Direct
99.2K shares-
WDAY
Workday, Inc.
Oct 6, 2026
Sale(S)
Direct
2.8K shares at avg. $184.80$517K
WDAY
Workday, Inc.
Oct 6, 2026
Sale(S)
Direct
10.6K shares at avg. $189.39$2.0M
WDAY
Workday, Inc.
Oct 6, 2026
Sale(S)
Direct
46K shares at avg. $186.66$8.6M
WDAY
Workday, Inc.
Oct 1, 2026
Sale(S)
Direct
14.2K shares at avg. $185.72$2.6M
WDAY
Workday, Inc.
Oct 1, 2026
Sale(S)
Direct
49K shares at avg. $186.55$9.1M
WDAY
Workday, Inc.
Oct 1, 2026
Sale(S)
Direct
1.5K shares at avg. $194.77$292K
WDAY
Workday, Inc.
Oct 1, 2026
Sale(S)
Direct
5.3K shares at avg. $183.86$974K
WDAY
Workday, Inc.
Oct 1, 2026
Sale(S)
Direct
600 shares at avg. $192.26$115K
WDAY
Workday, Inc.
Oct 1, 2026
Sale(S)
Direct
1.8K shares at avg. $188.34$341K
WDAY
Workday, Inc.
Oct 1, 2026
Conversion(C)
Direct
98.4K shares-
WDAY
Workday, Inc.
Oct 1, 2026
Sale(S)
Direct
4.6K shares at avg. $194.03$893K
WDAY
Workday, Inc.
Oct 1, 2026
Sale(S)
Direct
3.8K shares at avg. $190.85$725K
WDAY
Workday, Inc.
Oct 1, 2026
Sale(S)
Direct
9K shares at avg. $184.69$1.7M
WDAY
Workday, Inc.
Oct 1, 2026
Sale(S)
Direct
4.8K shares at avg. $187.50$893K

		Type	Shares	Price		Ownership
Oct 9, 2026	WDAY Workday, Inc.	Sale(S)	46,607	$186.36	$8,685,732	Direct
Oct 9, 2026	WDAY Workday, Inc.	Sale(S)	14,294	$186.92	$2,671,764	Direct
Oct 9, 2026	WDAY Workday, Inc.	Sale(S)	14,228	$188.19	$2,677,594	Direct
Oct 9, 2026	WDAY Workday, Inc.	Sale(S)	10,472	$190.13	$1,991,086	Direct
Oct 9, 2026	WDAY Workday, Inc.	Conversion(C)	99,835	-	$0	Direct
Oct 9, 2026	WDAY Workday, Inc.	Sale(S)	1,502	$190.96	$286,825	Direct
Oct 9, 2026	WDAY Workday, Inc.	Sale(S)	12,732	$189.36	$2,410,974	Direct
Oct 6, 2026	WDAY Workday, Inc.	Sale(S)	10,054	$187.77	$1,887,802	Direct
Oct 6, 2026	WDAY Workday, Inc.	Sale(S)	19,534	$188.64	$3,684,968	Direct
Oct 6, 2026	WDAY Workday, Inc.	Sale(S)	10,284	$185.86	$1,911,388	Direct
Oct 6, 2026	WDAY Workday, Inc.	Conversion(C)	99,228	-	$0	Direct
Oct 6, 2026	WDAY Workday, Inc.	Sale(S)	2,800	$184.80	$517,450	Direct
Oct 6, 2026	WDAY Workday, Inc.	Sale(S)	10,572	$189.39	$2,002,262	Direct
Oct 6, 2026	WDAY Workday, Inc.	Sale(S)	45,984	$186.66	$8,583,245	Direct
Oct 1, 2026	WDAY Workday, Inc.	Sale(S)	14,166	$185.72	$2,630,968	Direct
Oct 1, 2026	WDAY Workday, Inc.	Sale(S)	48,972	$186.55	$9,135,746	Direct
Oct 1, 2026	WDAY Workday, Inc.	Sale(S)	1,500	$194.77	$292,149	Direct
Oct 1, 2026	WDAY Workday, Inc.	Sale(S)	5,300	$183.86	$974,483	Direct
Oct 1, 2026	WDAY Workday, Inc.	Sale(S)	600	$192.26	$115,354	Direct
Oct 1, 2026	WDAY Workday, Inc.	Sale(S)	1,809	$188.34	$340,708	Direct
Oct 1, 2026	WDAY Workday, Inc.	Conversion(C)	98,446	-	$0	Direct
Oct 1, 2026	WDAY Workday, Inc.	Sale(S)	4,600	$194.03	$892,533	Direct
Oct 1, 2026	WDAY Workday, Inc.	Sale(S)	3,800	$190.85	$725,222	Direct
Oct 1, 2026	WDAY Workday, Inc.	Sale(S)	9,035	$184.69	$1,668,647	Direct
Oct 1, 2026	WDAY Workday, Inc.	Sale(S)	4,764	$187.50	$893,230	Direct

1-25 of 509 transactions

…

About DUFFIELD DAVID A

DUFFIELD DAVID A (SEC CIK 0000938071) files insider reports with the SEC as 10% Owner of Workday, Inc. (WDAY).

Signal8 holds 66 ownership filings by DUFFIELD DAVID A, all Form 4s, filed between Sep 5, 2024 and Oct 13, 2026. Those filings report 509 transactions, from Sep 3, 2024 to Oct 9, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on DUFFIELD DAVID A's filings is in PLEASANTON, CA.

Recent filings by DUFFIELD DAVID A

Oct 9, 2026: Open-market sales of WDAY shares (4 lines, Form 4, code S).
Oct 9, 2026: Conversion of WDAY shares (Form 4, code C).
Oct 9, 2026: Open-market sales of WDAY shares (2 lines, Form 4, code S).
Oct 6, 2026: Open-market sales of WDAY shares (3 lines, Form 4, code S).
Oct 6, 2026: Conversion of WDAY shares (Form 4, code C).

Other insiders filing for Workday, Inc. (WDAY)

Garfield Mark S., Chief Accounting Officer
Sauer Richard Harry, Chief Legal Officer & Secty
Enslin Robert, President, CCO
Rowe Zane, Chief Financial Officer
BHUSRI ANEEL, CEO
Kazmaier Gerrit S, President, Prod. and Tech.

How to read Form 4 transaction codes