Among active 13F managers last quarter, 7 opened and 27 added, while 21 reduced; the largest holder to move was Disciplined Growth Investors Inc (−4.7%). Over the last 180 days, 2 insiders sold and none bought, a net -$1.8M in open-market trades.
The legs disagree, or only one of them leans.
239 tracked 13F filers disclose a position in PRLB as of the latest SEC 13F filings, a combined $1.5B 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 | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 3.9M | $317.6M | ▲+5.9% Added · +218K sh | Q2 2026 | |
| 2 | Disciplined Growth Investors Inc | 2.4M | $194.0M | ▼−4.7% Reduced · −117K sh | Q2 2026 | |
| 3 | Vanguard Portfolio Management LLC | 1.6M | $130.4M | ▲+4.0% Added · +61K sh | Q2 2026 | |
| 4 | Dimensional Fund Advisors LP | 1.3M | $72.5M | ▼−0.3% Reduced · −4K sh | Q1 2026 | |
| 5 | State Street Corp | 1.1M | $92.8M | ▲+4.3% Added · +46K sh | Q2 2026 | |
| 6 | Vanguard Capital Management LLC | 1.1M | $86.0M | ▲+1.4% Added · +15K sh | Q2 2026 | |
| 7 | American Capital Management Inc | 620K | $50.5M | ▼−1.3% Reduced · −8K sh | Q2 2026 | |
| 8 | Geode Capital Management, LLC | 614K | $50.1M | ▲+5.8% Added · +34K sh | Q2 2026 | |
| 9 | Renaissance Technologies LLC | 520K | $29.7M | ▲+5.4% Added · +27K sh | Q1 2026 | |
| 10 | Arrowstreet Capital, Limited Partnership | 464K | $26.4M | ▲+0.7% Added · +3K sh | Q1 2026 | |
| 11 | FMR LLC | 443K | $36.1M | ▲+4.8% Added · +20K sh | Q2 2026 | |
| 12 | Prudential Financial Inc | 400K | $22.8M | ▲+119% Added · +217K sh | Q1 2026 | |
| 13 | Charles Schwab Investment Management Inc | 360K | $20.5M | ▼−0.8% Reduced · −3K sh | Q1 2026 | |
| 14 | Nuveen, LLC | 317K | $18.1M | ▼−2.7% Reduced · −9K sh | Q1 2026 | |
| 15 | Morgan Stanley | 294K | $16.7M | ▼−3.9% Reduced · −12K sh | Q1 2026 | |
| 16 | S Squared Technology, LLC | 288K | $23.5M | ▼−2.7% Reduced · −8K sh | Q2 2026 | |
| 17 | Northern Trust Corp | 267K | $15.2M | ▲+4.2% Added · +11K sh | Q1 2026 | |
| 18 | D. E. Shaw & Co., Inc. | 226K | $12.9M | ▲+6.0% Added · +13K sh | Q1 2026 | |
| 19 | Nordea Investment Management AB | 214K | $12.0M | ▼−4.5% Reduced · −10K sh | Q1 2026 | |
| 20 | Panagora Asset Management Inc | 181K | $14.7M | ▲+3.4% Added · +6K sh | Q2 2026 | |
| 21 | Hillsdale Investment Management Inc. | 174K | $9.9M | ▲+3.6% Added · +6K sh | Q1 2026 | |
| 22 | UBS Group AG | 169K | $9.6M | ▼−3.8% Reduced · −7K sh | Q1 2026 | |
| 23 | Vanguard Fiduciary Trust Co | 158K | $12.9M | ▲+2.9% Added · +4K sh | Q2 2026 | |
| 24 | Qube Research & Technologies Ltd | 149K | $8.5M | ▲+894% Added · +134K sh | Q1 2026 | |
| 25 | Goldman Sachs Group Inc | 141K | $8.0M | ▼−12% Reduced · −20K 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 PRLB and 27 added to an existing one, while 21 reduced. 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 | Their position there |
|---|---|---|
| Microsoft CorpMSFT | 125 funds | $203.0B |
| Nvidia CorpNVDA | 123 funds | $318.7B |
| Amazon.com IncAMZN | 121 funds | $158.8B |
| Meta Platforms Inc-Class AMETA | 120 funds | $84.0B |
| Alphabet Inc-CL AGOOGL | 119 funds | $136.7B |
| Broadcom IncAVGO | 119 funds | $132.9B |
| Apple IncAAPL | 118 funds | $230.7B |
| Visa Inc-Class A SharesV | 118 funds | $46.0B |
| Eli Lilly & CoLLY | 116 funds | $67.5B |
| JPMorgan Chase & CoJPM | 115 funds | $45.8B |
| Alphabet Inc-CL CGOOG | 114 funds | $105.7B |
| Advanced Micro DevicesAMD | 114 funds | $45.5B |
Ranked by how many of PRLB's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in PRLB.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 2, 2026 | Wehrwein Sven | Director | Sell (S) 2 lots, same day | 2K | $155K |
| May 12, 2026 | Kenison Michael R. | Chief Operations Officer | Sell (S) 4 lots, same day | 16K | $1.1M |
| May 11, 2026 | Kenison Michael R. | Chief Operations Officer | Sell (S) | 7K | $522K |
| May 7, 2026 | Kenison Michael R. | Chief Operations Officer | Sell (S) | 200 | $14K |
| Feb 17, 2026 | Kenison Michael R. | Chief Operations Officer | Sell (S) | 5K | $332K |
| Feb 6, 2026 | Kenison Michael R. | Chief Operations Officer | Sell (S) | 3K | $150K |
| Nov 25, 2025 | Kenison Michael R. | Chief Operations Officer | Sell (S) | 3K | $153K |
| Aug 5, 2025 | Gawlick Rainer | Director | Buy (P) | 2K | $75K |
| Aug 4, 2025 | Krishna Suresh | President and CEO, Director | Buy (P) | 2K | $75K |
| Sep 6, 2024 | Bodor Robert | President and CEO | Buy (P) | 3K | $100K |
| Dec 3, 2021 | Bodor Robert | President and CEO | Buy (P) | 3K | $150K |
| Dec 1, 2021 | Baker Arthur R. III | Chief Technology Officer | Buy (P) | 10K | $492K |
One row per insider, day and transaction code; shares and value are summed across the lots. Every lot is on the full insider page and in the filing.
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 46 | 39 | – |
Insiders Form 4 open-market | 0 | 2 | -$1.8M |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
Connected entities for PRLB
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/PRLB/capital-change-brief"
Use Arkolith's capital_change_brief for PRLB. 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 PRLB. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.