283 tracked 13F filers disclose a position in WK as of the latest SEC 13F filings, a combined $2.7B in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $276.5M | 4.6M | ▲+4.3% Added · +193K sh | Q1 2026 | |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | $235.9M | 4.0M | →First observed position No prior filed position | Q1 2026 | |
| 3 | EMINENCE CAPITAL, LP | $150.3M | 2.5M | ▼−32% Reduced · −1.2M sh | Q1 2026 | |
| 4 | Jericho Capital Asset Management L.P. | $147.0M | 2.5M | ▲New +2.5M sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $134.6M | 2.3M | →First observed position No prior filed position | Q1 2026 | |
| 6 | FMR LLC | $106.5M | 1.8M | ▲+29% Added · +396K sh | Q1 2026 | |
| 7 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | $100.2M | 1.7M | ▲+44% Added · +510K sh | Q1 2026 | |
| 8 | STATE STREET CORP | $71.6M | 1.5M | ▲+16% Added · +200K sh | Q2 2026 | |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | $62.8M | 1.3M | ▲+5.4% Added · +67K sh | Q2 2026 | |
| 10 | EDMOND DE ROTHSCHILD HOLDING S.A. | $61.5M | 1.3M | ▲+3.8% Added · +47K sh | Q2 2026 | |
| 11 | UBS Group AG | $67.3M | 1.1M | ▼−49% Reduced · −1.1M sh | Q1 2026 | |
| 12 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $66.2M | 1.1M | ▲+88% Added · +521K sh | Q1 2026 | |
| 13 | HAWK RIDGE CAPITAL MANAGEMENT LP | $65.1M | 1.1M | ▲New +1.1M sh | Q1 2026 | |
| 14 | Topline Capital Management, LLC | $62.6M | 1.1M | ▲+264% Added · +762K sh | Q1 2026 | |
| 15 | FULLER & THALER ASSET MANAGEMENT, INC. | $45.8M | 943K | ▲+2.3% Added · +21K sh | Q2 2026 | |
| 16 | FIRST TRUST ADVISORS LP | $51.5M | 863K | ▲+16% Added · +122K sh | Q1 2026 | |
| 17 | MAIRS & POWER INC | $40.2M | 829K | ▲+16% Added · +114K sh | Q2 2026 | |
| 18 | GOLDMAN SACHS GROUP INC | $48.4M | 812K | ▲+171% Added · +512K sh | Q1 2026 | |
| 19 | CITADEL ADVISORS LLC | $41.3M | 692K | ▲+75% Added · +296K sh | Q1 2026 | |
| 20 | NORGES BANK | $53.4M | 619K | ▲+5.3% Added · +31K sh | Q4 2025 | |
| 21 | Squarepoint Ops LLC | $35.3M | 592K | ▲11× Added · +540K sh | Q1 2026 | |
| 22 | Irenic Capital Management LP | $26.8M | 552K | —Held | Q2 2026 | |
| 23 | PRICE T ROWE ASSOCIATES INC /MD/ | $32.1M | 539K | ▼−49% Reduced · −509K sh | Q1 2026 | |
| 24 | LOOMIS SAYLES & CO L P | $30.7M | 515K | ▲+14% Added · +61K sh | Q1 2026 | |
| 25 | Nuveen, LLC | $29.1M | 488K | ▼−2.4% Reduced · −12K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 7 funds opened a new position in WK and 35 added to an existing one, while 16 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 158 funds | $222.7B |
| AMAZON.COM INCAMZN | 155 funds | $165.5B |
| NVIDIA CORPNVDA | 153 funds | $324.8B |
| ALPHABET INC-CL AGOOGL | 150 funds | $132.5B |
| APPLE INCAAPL | 148 funds | $241.7B |
| META PLATFORMS INC-CLASS AMETA | 148 funds | $93.1B |
| MICRON TECHNOLOGY INCMU | 147 funds | $34.1B |
| ALPHABET INC-CL CGOOG | 146 funds | $107.2B |
| ELI LILLY & COLLY | 146 funds | $63.5B |
| MASTERCARD INC - AMA | 145 funds | $42.0B |
| COSTCO WHOLESALE CORPCOST | 145 funds | $30.0B |
| BROADCOM INCAVGO | 143 funds | $129.6B |
Ranked by how many of WK's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 20, 2026 | Ziegler Brandon | EVP, CLO, CAO & Corp Secretary | Sell (S) | 7K | $499K |
| Jun 4, 2026 | Herz Robert H | Director | Sell (S) | 2K | $77K |
| May 29, 2026 | Herz Robert H | Director | Sell (S) | 1K | $50K |
| Dec 10, 2025 | MULCAHY DAVID S. | Director | Sell (S) | 1K | $106K |
| Dec 10, 2025 | Herz Robert H | Director | Sell (S) | 2K | $137K |
| Nov 26, 2025 | MULCAHY DAVID S. | Director | Sell (S) | 808 | $74K |
| May 23, 2025 | Klindt Jill | EVP, CFO & Treasurer | Sell (S) | 8K | $522K |
| Mar 14, 2025 | Herz Robert H | Director | Sell (S) | 2K | $133K |
| Mar 14, 2025 | Herz Robert H | Director | Sell (S) | 1K | $89K |
| Mar 13, 2025 | Hawkins Michael D. | EVP, Sales | Sell (S) | 9K | $773K |
| Mar 7, 2025 | Klindt Jill | EVP, CFO & Treasurer | Sell (S) | 6K | $476K |
| Mar 7, 2025 | Ziegler Brandon | EVP, CLO, CAO & Corp Secretary | Sell (S) | 4K | $353K |
Connected entities for WK
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/WK/capital-change-brief"
Use Arkolith's capital_change_brief for WK. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for WK. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.