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 PCB 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/PCB"
Use Arkolith to show who owns PCB, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $17.8M | 791K | ▼−1.0% Reduced · −8K sh | Q1 2026 | |
| 2 | VANGUARD GROUP INC | $14.8M | 684K | ▲+0.9% Added · +6K sh | Q4 2025 | |
| 3 | DIMENSIONAL FUND ADVISORS LP | $13.7M | 611K | ▲+3.6% Added · +21K sh | Q1 2026 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $12.3M | 546K | ▲New +546K sh | Q1 2026 | |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | $5.8M | 258K | ▼−1.7% Reduced · −4K sh | Q1 2026 | |
| 6 | STATE STREET CORP | $4.7M | 211K | ▼−0.2% Reduced · −355 sh | Q1 2026 | |
| 7 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $3.5M | 157K | ▲+1.6% Added · +3K sh | Q1 2026 | |
| 8 | AMERICAN CENTURY COMPANIES INC | $2.8M | 124K | ▼−0.2% Reduced · −237 sh | Q1 2026 | |
| 9 | NORTHERN TRUST CORP | $2.6M | 116K | ▲+1.2% Added · +1K sh | Q1 2026 | |
| 10 | GOLDMAN SACHS GROUP INC | $2.4M | 107K | ▼−15% Reduced · −19K sh | Q1 2026 | |
| 11 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $2.3M | 102K | —Held | Q1 2026 | |
| 12 | Hillsdale Investment Management Inc. | $2.2M | 99K | ▼−2.0% Reduced · −2K sh | Q1 2026 | |
| 13 | SEGALL BRYANT & HAMILL, LLC | $2.1M | 94K | ▼−0.2% Reduced · −167 sh | Q1 2026 | |
| 14 | ALLIANCEBERNSTEIN L.P. | $2.0M | 94K | —Held | Q1 2026 | |
| 15 | Connor, Clark & Lunn Investment Management Ltd. | $2.0M | 90K | ▲+0.2% Added · +182 sh | Q1 2026 | |
| 16 | MORGAN STANLEY | $1.9M | 86K | ▲+25% Added · +17K sh | Q1 2026 | |
| 17 | Empowered Funds, LLC | $1.8M | 79K | ▲+2.5% Added · +2K sh | Q1 2026 | |
| 18 | MARSHALL WACE, LLP | $1.7M | 74K | ▲+2.1% Added · +2K sh | Q1 2026 | |
| 19 | RENAISSANCE TECHNOLOGIES LLC | $1.7M | 74K | ▼−1.2% Reduced · −869 sh | Q1 2026 | |
| 20 | VANGUARD FIDUCIARY TRUST CO | $1.6M | 71K | ▲New +71K sh | Q1 2026 | |
| 21 | VANGUARD PORTFOLIO MANAGEMENT LLC | $1.4M | 62K | ▲New +62K sh | Q1 2026 | |
| 22 | AQR CAPITAL MANAGEMENT LLC | $1.3M | 57K | ▼−3.3% Reduced · −2K sh | Q1 2026 | |
| 23 | Bank of New York Mellon Corp | $1.3M | 57K | ▼−9.5% Reduced · −6K sh | Q1 2026 | |
| 24 | MARTINGALE ASSET MANAGEMENT L P | $913K | 41K | —Held | Q1 2026 | |
| 25 | LOS ANGELES CAPITAL MANAGEMENT LLC | $671K | 30K | ▲+103% Added · +15K 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 6, 2026 | LEE SANG YOUNG | Director, 10% Owner | Buy (P) | 1K | $24K |
| Mar 5, 2026 | LEE SANG YOUNG | Director, 10% Owner | Buy (P) | 8K | $167K |
| Mar 4, 2026 | LEE SANG YOUNG | Director, 10% Owner | Buy (P) | 2K | $46K |
| Mar 3, 2026 | LEE SANG YOUNG | Director, 10% Owner | Buy (P) | 92 | $2K |
| Feb 27, 2026 | LEE SANG YOUNG | Director, 10% Owner | Buy (P) | 27 | $603 |
| Feb 27, 2026 | LEE SANG YOUNG | Director, 10% Owner | Buy (P) | 1K | $22K |
| Feb 27, 2026 | LEE SANG YOUNG | Director, 10% Owner | Buy (P) | 1K | $22K |
| Feb 27, 2026 | LEE SANG YOUNG | Director, 10% Owner | Buy (P) | 1K | $22K |
| Feb 23, 2026 | LEE SANG YOUNG | Director, 10% Owner | Buy (P) | 3K | $68K |
| Feb 23, 2026 | LEE SANG YOUNG | Director, 10% Owner | Buy (P) | 2K | $45K |
| Oct 16, 2025 | CHANG TIMOTHY | EVP & CHIEF FINANCIAL OFFICER | Option exercise (M) | 5K | $49K |
| Oct 16, 2025 | CHANG TIMOTHY | EVP & CHIEF FINANCIAL OFFICER | Option exercise (M) | 5K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 25 funds | $18.1B |
| APPLE INCAAPL | 25 funds | $14.6B |
| MICROSOFT CORPMSFT | 25 funds | $10.5B |
| AMAZON.COM INCAMZN | 25 funds | $7.9B |
| ALPHABET INC-CL CGOOG | 25 funds | $6.0B |
| META PLATFORMS INC-CLASS AMETA | 25 funds | $4.8B |
| JPMORGAN CHASE & COJPM | 25 funds | $3.5B |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 25 funds | $2.6B |
| CHEVRON CORPCVX | 25 funds | $1.9B |
| BRISTOL-MYERS SQUIBB COBMY | 25 funds | $1.1B |
| TJX COMPANIES INCTJX | 25 funds | $929.8M |
| O'REILLY AUTOMOTIVE INCORLY | 25 funds | $900.5M |
Ranked by how many of PCB'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 PCB. 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.