Among active 13F managers last quarter, 16 opened and 22 added, while 17 reduced; the largest holder to move was D. E. Shaw & Co., Inc. (+242%). Over the last 180 days, 4 insiders bought and 7 insiders sold, a net +$6.3M in open-market trades.
Funds lean in and no leg opposes.
230 tracked 13F filers disclose a position in KOS as of the latest SEC 13F filings, a combined $797.3M 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 | State Street Corp | 29.5M | $62.1M | ▲+4.3% Added · +1.2M sh | Q2 2026 | |
| 2 | Equinox Partners Investment Management LLC | 20.7M | $43.6M | —Held | Q2 2026 | |
| 3 | D. E. Shaw & Co., Inc. | 20.4M | $56.7M | ▲+242% Added · +14.4M sh | Q1 2026 | |
| 4 | Two Sigma Investments, LP | 18.7M | $51.9M | ▲+385% Added · +14.8M sh | Q1 2026 | |
| 5 | Geode Capital Management, LLC | 17.1M | $36.0M | ▲+34% Added · +4.4M sh | Q2 2026 | |
| 6 | Charles Schwab Investment Management Inc | 14.1M | $39.3M | ▲+17% Added · +2.1M sh | Q1 2026 | |
| 7 | Millennium Management LLC | 12.6M | $35.1M | ▼−15% Reduced · −2.2M sh | Q1 2026 | |
| 8 | Grantham, Mayo, Van Otterloo & Co. LLC | 11.9M | $25.0M | ▼−35% Reduced · −6.5M sh | Q2 2026 | |
| 9 | Jane Street Group, LLC | 11.7M | $32.6M | ▲+27% Added · +2.5M sh | Q1 2026 | |
| 10 | Goldman Sachs Group Inc | 9.3M | $25.7M | ▲+37% Added · +2.5M sh | Q1 2026 | |
| 11 | Davidson Kempner Capital Management LP | 8.0M | $16.9M | ▼−5.0% Reduced · −420K sh | Q2 2026 | |
| 12 | First Trust Advisors LP | 7.7M | $21.4M | ▲+9.2% Added · +646K sh | Q1 2026 | |
| 13 | Dimensional Fund Advisors LP | 7.1M | $19.7M | ▲+20% Added · +1.2M sh | Q1 2026 | |
| 14 | M&G Plc | 7.0M | $21.1M | ▼−20% Reduced · −1.7M sh | Q1 2026 | |
| 15 | Russell Investments Group, Ltd. | 5.9M | $16.3M | ▼−0.5% Reduced · −28K sh | Q1 2026 | |
| 16 | Morgan Stanley | 5.8M | $16.2M | ▲+24% Added · +1.1M sh | Q1 2026 | |
| 17 | Bank Of America Corp | 5.5M | $15.4M | ▲+44% Added · +1.7M sh | Q1 2026 | |
| 18 | Renaissance Technologies LLC | 5.3M | $14.8M | ▲+224% Added · +3.7M sh | Q1 2026 | |
| 19 | UBS Group AG | 4.8M | $13.4M | ▼−22% Reduced · −1.3M sh | Q1 2026 | |
| 20 | Boston Partners | 4.8M | $13.3M | ▲New +4.8M sh | Q1 2026 | |
| 21 | Bridgewater Associates, LP | 4.7M | $10.0M | ▲New +4.7M sh | Q2 2026 | |
| 22 | Northern Trust Corp | 4.2M | $11.8M | ▲+15% Added · +561K sh | Q1 2026 | |
| 23 | UBS AM, a distinct business unit of UBS Asset Management Americas LLC | 4.2M | $11.5M | ▲+6.7% Added · +260K sh | Q1 2026 | |
| 24 | Ostrum Asset Management | 4.0M | $11.1M | —Held | Q1 2026 | |
| 25 | Vaughan Nelson Investment Management, L.P. | 4.0M | $8.5M | —Held | Q2 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. 2 value rows are withheld because the reported units disagree with same-security peers; share counts are unchanged.
Last quarter, 16 funds opened a new position in KOS and 22 added to an existing one, while 17 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 |
|---|---|---|
| Nvidia CorpNVDA | 134 funds | $318.7B |
| Microsoft CorpMSFT | 132 funds | $220.9B |
| Amazon.com IncAMZN | 130 funds | $164.7B |
| Apple IncAAPL | 128 funds | $239.4B |
| Meta Platforms Inc-Class AMETA | 128 funds | $92.1B |
| Broadcom IncAVGO | 127 funds | $130.4B |
| Alphabet Inc-CL AGOOGL | 127 funds | $128.3B |
| Eli Lilly & CoLLY | 127 funds | $64.4B |
| Micron Technology IncMU | 127 funds | $32.9B |
| JPMorgan Chase & CoJPM | 124 funds | $48.8B |
| Costco Wholesale CorpCOST | 123 funds | $31.0B |
| Berkshire Hathaway Inc-CL BBRK/B | 123 funds | $30.3B |
Ranked by how many of KOS's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in KOS.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 2, 2026 | Shah Nealesh D. | SVP and CFO | Sell (S) | 46K | $94K |
| Jul 2, 2026 | Marion Josh R. | SVP and General Counsel | Sell (S) | 25K | $51K |
| Jul 2, 2026 | Glass Ronald W. | VP & Chief Accounting Officer | Sell (S) | 12K | $25K |
| Jul 2, 2026 | Inglis Andrew G | Chairman and CEO, Director | Sell (S) | 86K | $176K |
| May 28, 2026 | Franklin Roy A. | Director | Sell (S) | 43K | $119K |
| May 27, 2026 | Sterin Steven | Director | Sell (S) | 39K | $105K |
| May 27, 2026 | Grant John Douglas Kelso | Director | Sell (S) | 43K | $119K |
| Mar 10, 2026 | Ogunlesi Adebayo O. | Director | Buy (P) | 3.2M | $6.0M |
| Mar 10, 2026 | Stice J Michael | Director | Buy (P) | 53K | $100K |
| Mar 10, 2026 | Inglis Andrew G | Chairman and CEO, Director | Buy (P) | 316K | $600K |
| Mar 10, 2026 | Shah Nealesh D. | SVP and CFO | Buy (P) | 158K | $300K |
| Feb 4, 2026 | Shah Nealesh D. | SVP and CFO | Sell (S) | 25K | $35K |
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 | 45 | 22 | – |
Insiders Form 4 open-market | 4 | 7 | +$6.3M |
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.
| Class | 13F holders | Value held |
|---|---|---|
| KOSthis pagecs | 249 funds | $1.0B |
| KOS 3.125 03/15/30NOTE 3.125% 3/1 | 19 funds | $241.9M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
Connected entities for KOS
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/KOS/capital-change-brief"
Use Arkolith's capital_change_brief for KOS. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + the live filing stream, joined for KOS. Filings are public domain, sourced to SEC EDGAR.