🕵️ Workiva Inc. ($WK)
SEC insider & ownership activity, last 12 months · CIK 1445305 · every row links its SEC filing
Over the last 12 months insiders sold $944K with no open-market buying against it. Brandon Zielger sold $499K in discretionary trades (Aug). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 3 sellers, $944K (6 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Brandon Zielger | 0 | – | 1 | $499K | Aug 20, 2026 |
| Robert H. Herz | 0 | – | 3 | $264K | Jun 4, 2026 |
| David S. Mulcahy | 0 | – | 2 | $181K | Dec 10, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8.1% | 13G | Apr 24, 2025 | filing ↗ | |
| Vanguard Portfolio Management | 7.5% | 13G | Apr 29, 2026 | filing ↗ | |
| Jericho Capital Asset Management L.P. | 6.6% | Class A | 13G | Aug 14, 2026 | filing ↗ |
| Josh Resnick | 6.6% | Class A | 13G | Aug 14, 2026 | filing ↗ |
| Vanguard Capital Management | 5.1% | 13G | Jul 31, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Brandon Ziegler | $499K | Aug 20, 2026 | filing ↗ |
| Matthew Rizai | $1.2M | Aug 5, 2026 | filing ↗ |
| Matthew Rizai | $1.7M | Jul 16, 2026 | filing ↗ |
| Matthew Rizai | $6.0M | Jul 1, 2026 | filing ↗ |
| Matthew Rizai | $987K | Jun 17, 2026 | filing ↗ |
| Robert Herz | $50K | May 29, 2026 | filing ↗ |
| Matthew Rizai | $4.6M | Mar 5, 2026 | filing ↗ |
| Jill Klindt | $942K | Feb 24, 2026 | filing ↗ |
| Matthew Rizai | $3.0M | Feb 20, 2026 | filing ↗ |
| Matthew Rizai | $2.4M | Jan 21, 2026 | filing ↗ |
| Matthew Rizai | $2.2M | Jan 2, 2026 | filing ↗ |
| Matthew Rizai | $5.3M | Dec 17, 2025 | filing ↗ |
| Robert Herz | $137K | Dec 10, 2025 | filing ↗ |
| Michael Hawkins | $1.1M | Dec 4, 2025 | filing ↗ |
| David S. Mulcahy | $11.1M | Nov 25, 2025 | filing ↗ |
| Matthew Rizai | $7.3M | Nov 12, 2025 | filing ↗ |
| Michael Hawkins | $1.1M | Nov 11, 2025 | filing ↗ |
| Matthew Rizai | $4.4M | Oct 13, 2025 | filing ↗ |
| Matthew Rizai | $3.5M | Oct 3, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Aug 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 4, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 28, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 28, 2026 | filing ↗ |
| Earnings (2.02) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Auditor change (4.01) | Apr 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 30, 2026 | filing ↗ |
| Earnings (2.02) | Feb 19, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 19, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 27, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 27, 2026 | filing ↗ |
| Officer/director changes (5.02) | Dec 3, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 3, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 3, 2025 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |