The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query PLAB owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/PLAB"
Use Arkolith to show who owns PLAB, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | VANGUARD PORTFOLIO MANAGEMENT LLC | $115.0M | 2.8M | ▲New +2.8M sh | Q1 2026 | |
| 2 | STATE STREET CORP | $90.5M | 2.2M | ▼−0.2% Reduced · −4K sh | Q1 2026 | |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | $75.0M | 1.9M | ▲+1.4% Added · +25K sh | Q1 2026 | |
| 4 | VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. | $47.9M | 1.2M | ▲New +1.2M sh | Q1 2026 | |
| 5 | NEEDHAM INVESTMENT MANAGEMENT LLC | $24.4M | 605K | ▼−22% Reduced · −170K sh | Q1 2026 | |
| 6 | Polar Capital Holdings Plc | $20.7M | 513K | ▲New +513K sh | Q1 2026 | |
| 7 | Clark Capital Management Group, Inc. | $16.4M | 406K | ▲+50% Added · +136K sh | Q1 2026 | |
| 8 | VANGUARD FIDUCIARY TRUST CO | $15.3M | 379K | ▲New +379K sh | Q1 2026 | |
| 9 | HEARTLAND ADVISORS INC | $15.0M | 371K | ▼−3.8% Reduced · −14K sh | Q1 2026 | |
| 10 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $14.7M | 363K | —Held | Q1 2026 | |
| 11 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | $14.2M | 352K | ▼−34% Reduced · −178K sh | Q1 2026 | |
| 12 | Universal- Beteiligungs- und Servicegesellschaft mbH | $11.7M | 289K | ▲+1.4% Added · +4K sh | Q1 2026 | |
| 13 | Cambria Investment Management, L.P. | $9.5M | 234K | ▼−2.8% Reduced · −7K sh | Q1 2026 | |
| 14 | MEEDER ASSET MANAGEMENT INC | $8.9M | 221K | ▼−22% Reduced · −61K sh | Q1 2026 | |
| 15 | PUBLIC SECTOR PENSION INVESTMENT BOARD | $8.5M | 211K | ▲+3.5% Added · +7K sh | Q1 2026 | |
| 16 | Allspring Global Investments Holdings, LLC | $6.5M | 159K | ▲+829% Added · +142K sh | Q1 2026 | |
| 17 | O'SHAUGHNESSY ASSET MANAGEMENT, LLC | $5.5M | 136K | ▼−4.8% Reduced · −7K sh | Q1 2026 | |
| 18 | Cresset Asset Management, LLC | $3.7M | 92K | ▲+3.4% Added · +3K sh | Q1 2026 | |
| 19 | New Age Alpha Advisors, LLC | $3.3M | 82K | ▼−3.8% Reduced · −3K sh | Q1 2026 | |
| 20 | STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM | $3.2M | 80K | —Held | Q1 2026 | |
| 21 | INTECH INVESTMENT MANAGEMENT LLC | $3.2M | 79K | ▲+215% Added · +54K sh | Q1 2026 | |
| 22 | WEDGE CAPITAL MANAGEMENT L L P/NC | $3.1M | 76K | ▼−6.9% Reduced · −6K sh | Q1 2026 | |
| 23 | Man Group plc | $3.0M | 74K | ▲+22% Added · +13K sh | Q1 2026 | |
| 24 | NorthCrest Asset Manangement, LLC | $2.8M | 68K | ▲+0.2% Added · +129 sh | Q1 2026 | |
| 25 | SEGALL BRYANT & HAMILL, LLC | $2.5M | 62K | ▼−0.3% Reduced · −190 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.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Mar 26, 2026 | Lee Kang Jyh | Director | Sell (S) | 5K | $204K |
| Mar 26, 2026 | Lee Kang Jyh | Director | Option exercise (M) | 5K | $54K |
| Mar 26, 2026 | Lee Kang Jyh | Director | Option exercise (M) | 5K | $0 |
| Mar 23, 2026 | Lee Kang Jyh | Director | Sell (S) | 10K | $390K |
| Mar 19, 2026 | Lee Kang Jyh | Director | Sell (S) | 10K | $358K |
| Feb 9, 2026 | ZHANG RUI | VP, CAO & Corporate Controller | Grant (A) | 1K | $0 |
| Feb 9, 2026 | Rivera Eric | President, CFO | Grant (A) | 23K | $0 |
| Feb 9, 2026 | Alesio Todd Anthony | SVP, CAO | Grant (A) | 983 | $0 |
| Jan 20, 2026 | Almeida Michelle | Director | Grant (A) | 1K | $0 |
| Jan 20, 2026 | Liao Daniel JL | Director | Grant (A) | 1K | $0 |
| Jan 16, 2026 | Park Han Kyung | SVP & GM of FPD Ops | Sell (S) | 6K | $218K |
| Jan 16, 2026 | Lee Kang Jyh | Director | Sell (S) | 10K | $345K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 108 funds | $46.4B |
| ALPHABET INC-CL AGOOGL | 108 funds | $31.9B |
| AMAZON.COM INCAMZN | 107 funds | $36.3B |
| APPLIED MATERIALS INCAMAT | 107 funds | $6.2B |
| APPLE INCAAPL | 105 funds | $54.7B |
| META PLATFORMS INC-CLASS AMETA | 105 funds | $22.3B |
| JPMORGAN CHASE & COJPM | 105 funds | $14.6B |
| ELI LILLY & COLLY | 104 funds | $13.0B |
| VISA INC-CLASS A SHARESV | 104 funds | $11.0B |
| LAM RESEARCH CORPLRCX | 104 funds | $6.8B |
| BANK OF AMERICA CORPBAC | 104 funds | $5.2B |
| UNITEDHEALTH GROUP INCUNH | 104 funds | $5.1B |
Ranked by how many of PLAB's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for PLAB. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.