Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in KOS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 56.0M | $118.2M | +18.0% | 9.408% | 0.00% |
| 2 | STATE STREET CORP | 29.5M | $62.1M | +4.3% | 4.946% | 0.00% |
| 3 | TWO SIGMA INVESTMENTS, LP | 25.4M | $53.6M | +36.0% | 4.265% | 0.04% |
| 4 | D. E. Shaw & Co., Inc. | 24.5M | $51.8M | +20.4% | 4.121% | 0.02% |
| 5 | Equinox Partners Investment Management LLC | 20.7M | $43.6M | 0.0% | 3.473% | 20.54% |
| 6 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 18.8M | $39.8M | -6.0% | 3.165% | 0.12% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 17.1M | $36.0M | +34.2% | 2.866% | 0.00% |
| 8 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 13.8M | $29.1M | -2.6% | 2.312% | 0.00% |
| 9 | VANGUARD PORTFOLIO MANAGEMENT LLC | 12.0M | $25.3M | +39.2% | 2.015% | 0.00% |
| 10 | Grantham, Mayo, Van Otterloo & Co. LLC | 11.9M | $25.0M | -35.3% | 1.990% | 0.06% |
| 11 | Invesco Ltd. | 10.9M | $23.1M | -1.8% | 1.839% | 0.00% |
| 12 | DIMENSIONAL FUND ADVISORS LP | 9.6M | $20.2M | +35.3% | 1.609% | 0.00% |
| 13 | GOLDMAN SACHS GROUP INC | 8.5M | $18.0M | -7.9% | 1.433% | 0.00% |
| 14 | AMERICAN CENTURY COMPANIES INC | 8.0M | $17.0M | +8083.6% | 1.350% | 0.01% |
| 15 | DAVIDSON KEMPNER CAPITAL MANAGEMENT LP | 8.0M | $16.9M | -5.0% | 1.344% | 0.20% |
| 16 | MILLENNIUM MANAGEMENT LLC | 7.4M | $15.7M | -41.2% | 1.248% | 0.01% |
| 17 | MORGAN STANLEY | 7.4M | $15.5M | +26.1% | 1.236% | 0.00% |
| 18 | Nuveen, LLC | 7.3M | $15.5M | +121.2% | 1.231% | 0.00% |
| 19 | M&G Plc | 7.4M | $14.8M | +5.4% | 1.244% | 0.07% |
| 20 | RENAISSANCE TECHNOLOGIES LLC | 7.0M | $14.8M | +31.3% | 1.177% | 0.02% |
| 21 | VANGUARD CAPITAL MANAGEMENT LLC | 6.8M | $14.4M | +6.1% | 1.144% | 0.00% |
| 22 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 6.5M | $13.7M | +10.9% | 1.087% | 0.00% |
| 23 | UBS Group AG | 6.1M | $12.8M | +26.3% | 1.021% | 0.00% |
| 24 | NORTHERN TRUST CORP | 5.3M | $11.2M | +25.6% | 0.892% | 0.00% |
| 25 | Bridgewater Associates, LP | 4.7M | $10.0M | — | 0.793% | 0.04% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in KOS — a direct measure of their conviction.
Filings activity in KOS during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 269 | +1.5% | 73.90% | 0.46 pp | $923M | 24% |
| Q1 2026 | 265 | +26% | 74.36% | +17.17 pp | $1.22B | +288% |
| Q4 2025 | 211 | 9.8% | 57.19% | 9.57 pp | $314M | 52% |
| Q3 2025 | 234 | +4.0% | 66.76% | 2.46 pp | $658M | 5.8% |
| Q2 2025 | 225 | 8.9% | 69.22% | 2.12 pp | $698M | 25% |
| Q1 2025 | 247 | 6.4% | 71.34% | +0.04 pp | $936M | 28% |
| Q4 2024 | 264 | +0.0% | 71.30% | 2.21 pp | $1.30B | 14% |
| Q3 2024 | 264 | — | 73.51% | — | $1.52B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying KOS stock.
Based on Q2 2026 13F filings, institutional ownership of Kosmos Energy Ltd. stands at 73.9%, held across 269 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of KOS, with approximately 56,023,521 shares worth $0.12B as of Q2 2026.
Yes — 5 widely-followed marquee investors appear among the top 25 institutional holders of KOS, including TWO SIGMA INVESTMENTS, LP, MILLENNIUM MANAGEMENT LLC, RENAISSANCE TECHNOLOGIES LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, Bridgewater Associates, LP.
Our composite Smart Money Score for KOS is 63 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
48 institutions opened new positions in KOS during Q2 2026, while 41 fully exited. 68 added to existing positions and 149 trimmed.
KOS institutional ownership fell by 0.46 percentage points quarter-over-quarter, with a net change of +4 holders.
The top 10 institutions account for 52.5% of all reported 13F value in KOS, and the top 25 account for 77.8%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Kosmos Energy Ltd. (KOS) Institutional Ownership