Among active 13F managers last quarter, 6 opened and 7 added, while 8 reduced; the largest holder to move was Marshall Wace, LLP (+74%). Over the last 180 days, 5 insiders sold and none bought, a net -$45K in open-market trades.
The legs disagree, or only one of them leans.
66 tracked 13F filers disclose a position in STEM as of the latest SEC 13F filings, a combined $15.3M 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 | Vanguard Capital Management LLC | 361K | $2.8M | ▲+5.1% Added · +17K sh | Q2 2026 | |
| 2 | Marshall Wace, LLP | 291K | $2.6M | ▲+74% Added · +124K sh | Q1 2026 | |
| 3 | Two Sigma Investments, LP | 175K | $1.6M | ▲+106% Added · +90K sh | Q1 2026 | |
| 4 | BlackRock, Inc. | 164K | $1.3M | ▲+22% Added · +30K sh | Q2 2026 | |
| 5 | Trexquant Investment LP | 111K | $864K | ▲+21% Added · +19K sh | Q2 2026 | |
| 6 | Geode Capital Management, LLC | 93K | $727K | ▲+1.0% Added · +962 sh | Q2 2026 | |
| 7 | Bridgeway Capital Management, LLC | 60K | $465K | ▼−14% Reduced · −10K sh | Q2 2026 | |
| 8 | Renaissance Technologies LLC | 59K | $518K | ▲+423% Added · +47K sh | Q1 2026 | |
| 9 | Vanguard Fiduciary Trust Co | 57K | $444K | ▲+14% Added · +7K sh | Q2 2026 | |
| 10 | UBS Group AG | 53K | $471K | ▲+46% Added · +17K sh | Q1 2026 | |
| 11 | BNP Paribas Financial Markets | 53K | $469K | ▲+174% Added · +34K sh | Q1 2026 | |
| 12 | Morgan Stanley | 48K | $425K | ▲+100% Added · +24K sh | Q1 2026 | |
| 13 | State Street Corp | 38K | $299K | ▼~0% Reduced · −1 sh | Q2 2026 | |
| 14 | Citigroup Inc | 37K | $329K | ▼~0% Reduced · −9 sh | Q1 2026 | |
| 15 | HSBC Holdings PLC | 28K | $249K | —Held | Q1 2026 | |
| 16 | Royal Bank Of Canada | 28K | $249K | ▲+8.8% Added · +2K sh | Q1 2026 | |
| 17 | Price T Rowe Associates Inc | 27K | $209K | ▲+92% Added · +13K sh | Q2 2026 | |
| 18 | Citadel Advisors LLC | 24K | $185K | ▲Added Added · +24K sh | Q2 2026 | |
| 19 | Canada Pension Plan Investment Board | 21K | $188K | ▲+32% Added · +5K sh | Q1 2026 | |
| 20 | Northern Trust Corp | 19K | $165K | ▼−0.8% Reduced · −146 sh | Q1 2026 | |
| 21 | HighTower Advisors, LLC | 16K | $143K | ▼−1.0% Reduced · −160 sh | Q1 2026 | |
| 22 | Engineers Gate Manager LP | 13K | $99K | ▲New +13K sh | Q2 2026 | |
| 23 | Susquehanna Portfolio Strategies, LLC | 12K | $106K | ▼−55% Reduced · −15K sh | Q1 2026 | |
| 24 | Bank Of America Corp | 11K | $101K | ▼−8.1% Reduced · −1K sh | Q1 2026 | |
| 25 | XTX Topco Ltd | 10K | $90K | ▼−30% Reduced · −4K 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, 6 funds opened a new position in STEM and 7 added to an existing one, while 8 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 |
|---|---|---|
| Alphabet Inc-CL AGOOGL | 30 funds | $57.6B |
| Meta Platforms Inc-Class AMETA | 30 funds | $29.2B |
| Teradyne IncTER | 30 funds | $2.3B |
| Lumentum Holdings IncLITE | 30 funds | $2.2B |
| Nvidia CorpNVDA | 29 funds | $126.1B |
| Apple IncAAPL | 29 funds | $88.0B |
| Microsoft CorpMSFT | 29 funds | $65.9B |
| Amazon.com IncAMZN | 29 funds | $51.9B |
| Broadcom IncAVGO | 29 funds | $49.8B |
| Advanced Micro DevicesAMD | 29 funds | $27.8B |
| Eli Lilly & CoLLY | 29 funds | $26.6B |
| Micron Technology IncMU | 29 funds | $23.6B |
Ranked by how many of STEM's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in STEM.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 20, 2026 | Musfeldt Brian | Chief Financial Officer | Sell (S) | 996 | $6K |
| Jul 2, 2026 | Carlson Michael James | President, Managed Services | Sell (S) | 1K | $11K |
| Jul 2, 2026 | Narayanan Arun | Chief Executive Officer | Sell (S) | 2K | $16K |
| Jul 2, 2026 | Laureles Saul R. | Chief Legal Officer | Sell (S) | 675 | $5K |
| Jul 2, 2026 | Tappin Matthew | President, Software Products | Sell (S) | 996 | $8K |
| Mar 11, 2026 | Tappin Matthew | President, Software Products | Sell (S) | 402 | $4K |
| Mar 10, 2026 | Laureles Saul R. | Chief Legal Officer | Sell (S) | 942 | $10K |
| Mar 10, 2026 | Narayanan Arun | Chief Executive Officer | Sell (S) | 5K | $57K |
| Mar 10, 2026 | Carlson Michael James | President, Managed Services | Sell (S) | 2K | $23K |
| Mar 10, 2026 | Tappin Matthew | President, Software Products | Sell (S) | 655 | $7K |
| Mar 4, 2026 | Tappin Matthew | President, Software Products | Sell (S) | 185 | $2K |
| Mar 3, 2026 | Tappin Matthew | President, Software Products | Sell (S) | 300 | $3K |
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 | 18 | 23 | – |
Insiders Form 4 open-market | 0 | 5 | -$45K |
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 STEM
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/STEM/capital-change-brief"
Use Arkolith's capital_change_brief for STEM. 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 STEM. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.