Workiva WK Insider Ownership

NYSE WK

$86.51 +0.71 (+0.83%)

At close: Oct 26, 2026 · 4:00 PM EDT

Insider Holdings by Owner

3.51Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

5.89%

▼-0.020% pp QoQ

Shares Held by Insiders

3.28Mn

filed for Sep 2026

▼-0.34% QoQ

Shares Outstanding

55.64Mn

55,638,926 shares

Direct Holdings

1.53Mn

Indirect: 1.75Mn

Net Open-Market Trades

-6.57K

net sold · -$499.20K in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Open-Market Insider Trades

Bought Sold

Latest quarter —

Net over range —

Net-buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Across the past 12 months, open-market trades by Workiva insiders were all sales, totaling $943,561 (12.54K shares).

By number of insiders, Workiva saw 3 insiders sell on the open market over the past 12 months and none buy.
Brandon Ziegler (EVP, CLO, CAO & Corporate Secretary) was WK's largest open-market seller in the past 12 months, with $499,199 of sales (6.57K shares); the latest was on August 20, 2026.
In transactions other than open-market trades, Workiva insiders received 385.24K shares in stock awards, gave up 135.5K shares to cover taxes or exercise prices and gave away 2.78K shares as gifts over the past 12 months.
Business Quant data puts insider holdings in WK at 3.28Mn shares across insiders' latest Form 4 filings, or 5.89% of the 55.64Mn shares outstanding; that total is down 0.34% from 3.29Mn shares at the end of Q2 2026 and up 7.90% from 3.04Mn shares at the end of Q3 2025.
Direct holdings account for 1.53Mn shares (46.58%) of WK's insider total, and indirect holdings through trusts, partnerships and family members for 1.75Mn shares (53.42%).
WK's insider total is spread across 14 insiders who have filed a Form 4 in the past two years.
Workiva's top three insider holders by shares held are Martin J. Vanderploeg (Director, 1.93Mn shares), Julie Iskow (President & CEO, 460.53K shares) and David S. Mulcahy (Director, 240.37K shares).
Martin J. Vanderploeg holds 58.88% of the combined insider position in Workiva.
Institutions accounted for 88.93% of WK's outstanding shares in Q2 2026.
Over the past 12 months, 12 insiders reported transactions in Workiva stock in 30 Form 4 filings.
The insider data for WK reflects Form 4 filings through September 16, 2026.

Form 4 Holdings

Insiders Holding WK

Insiders 17

Shares held 3.51Mn

Of outstanding 6.31%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Martin J. Vanderploeg	President Ceo	0	1,578,937	1,578,937	45.0%	16 Sep, 2026
2	Jeff D. Trom	Executive Vp Cto	290,907	220,611	511,518	14.6%	06 Sep, 2022
3	Julie Iskow	President Ceo	460,530	0	460,530	13.1%	06 Apr, 2026
4	David S. Mulcahy	Director	240,373	0	240,373	6.9%	12 Dec, 2025
5	Mithun Banarjee	Chief Customer Officer	160,551	0	160,551	4.6%	06 Sep, 2022
6	Barbara A Larson	Evp, Cfo Treasurer	141,103	0	141,103	4.0%	03 Feb, 2026
7	Brandon Ziegler	Evp, Clo, Cao Corp Secretary	126,216	0	126,216	3.6%	21 Aug, 2026
8	Jill Klindt	Evp, Cfo Treasurer	107,581	0	107,581	3.1%	27 May, 2025
9	Michael D. Hawkins	Evp, Sales	52,306	0	52,306	1.5%	14 Mar, 2025
10	Robert H Herz	Director	37,372	0	37,372	1.1%	08 Jun, 2026
11	Junko Swain	Svp, Chief Accounting Officer	28,830	0	28,830	0.8%	02 Sep, 2026
12	Brigid A. Bonner	Director	21,588	0	21,588	0.6%	03 Jun, 2024
13	Suku V. Radia	Director	15,643	0	15,643	0.4%	03 Jun, 2026
14	Michael M Crow	Director	7,288	0	7,288	0.2%	03 Jun, 2026
15	Astha Malik	Director	7,288	0	7,288	0.2%	03 Jun, 2026
16	Mark S Peek	Director	6,070	0	6,070	0.2%	03 Jun, 2026
17	Richard Scott Herren	Director	4,947	0	4,947	0.1%	03 Jun, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

988 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
15 Sep, 2026	Martin J. Vanderploeg	Director	Disposed G	60,000	$0.00	$0	1,141,832	Indirect
15 Sep, 2026	Martin J. Vanderploeg	Director	Acquired G	60,000	$0.00	$0	60,000	Indirect
01 Sep, 2026	Junko Swain	Svp, Chief Accounting Officer	Disposed F	2,151	$76.70	$164.98K	28,830	Direct
20 Aug, 2026	Brandon Ziegler	Evp, Clo, Cao Corp Secretary	Disposed S	6,571	$75.97	$499.20K	126,216	Direct
18 Aug, 2026	Martin J. Vanderploeg	Director	Disposed G	2,780	$0.00	$0	437,105	Indirect
04 Jun, 2026	Robert H Herz	Director	Disposed S	1,500	$51.23	$76.85K	37,372	Direct
01 Jun, 2026	Richard Scott Herren	Director	Acquired A	4,070	—	—	4,947	Direct
01 Jun, 2026	Martin J. Vanderploeg	Director	Disposed F	28,942	$52.83	$1.53Mn	288,205	Direct
01 Jun, 2026	Astha Malik	Director	Acquired A	4,070	—	—	7,288	Direct
01 Jun, 2026	Robert H Herz	Director	Acquired A	4,070	—	—	38,872	Direct
01 Jun, 2026	Michael M Crow	Director	Acquired A	4,070	—	—	7,288	Direct
01 Jun, 2026	Mark S Peek	Director	Acquired A	4,070	—	—	6,070	Direct
01 Jun, 2026	Suku V. Radia	Director	Acquired A	4,070	—	—	15,643	Direct
01 Jun, 2026	Martin J. Vanderploeg	Director	Acquired A	4,070	—	—	292,275	Direct
29 May, 2026	Robert H Herz	Director	Disposed S	1,000	$49.69	$49.69K	34,802	Direct
03 Apr, 2026	Julie Iskow	President Ceo	Disposed F	7,578	$60.00	$454.68K	460,530	Direct
02 Mar, 2026	Richard Scott Herren	Director	Acquired A	877	—	—	877	Direct
01 Mar, 2026	Julie Iskow	President Ceo	Acquired A	4,092	$0.00	$0	472,893	Direct
01 Mar, 2026	Julie Iskow	President Ceo	Disposed F	2,208	$61.58	$135.97K	470,685	Direct
01 Mar, 2026	Julie Iskow	President Ceo	Disposed F	2,577	$61.58	$158.69K	468,108	Direct

Showing 1 to 20 of 988 transactions