Latest Period
Q1 2026
Security Snapshot
Kosmos Energy Ltd. - Common Stock (KOS) Institutional Ownership
CUSIP: 500688106
13F Institutional Holders and Ownership History from Q3 2018 to Q1 2026
Institutions Reporting
258
Shares (Excl. Options)
433,552,356
Price
$2.78
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- Security type / class
- Equity / Common Stock
- Symbol
- KOS on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 433,552,356
- Total 13F value
- $1,207,550,621
- Portfolio coverage rank
- 0%
- Share change
- +88,201,710
- Value change
- +$253,890,609
- Number of holders
- 258
- Shares outstanding
- 579,358,165
- SEC-reported price per share
- $2.99
- Insider filing price
- $2.99
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- KOS - Kosmos Energy Ltd. - Common Stock is tracked under CUSIP 500688106.
- 258 institutions reported positions in Q1 2026.
- 8 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 207 to 258 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $310,785,907 to $1,207,550,621.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 258 institutions filings for Q1 2026.
Security key
500688106
Latest holder period
Q1 2026
13F holders
258
13D/G owners
8
CIK / CUSIP context first
Open Q1 2026 holders
KOS full holder history
Kosmos Energy Ltd. SEC filings
Kosmos Energy Ltd. company facts
Kosmos Energy Ltd. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 500688106:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
8
Security
KOS
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 6.7% | -15% | $110,663,888 | +$5,696,868 | 39,807,154 | +5.4% | BlackRock, Inc. | 31 Mar 2026 |
| cobas asset management, sgiic, s.a. | 5.2% | $42,620,828 | 24,779,551 | cobas asset management, sgiic, s.a. | 10 Apr 2025 | |||
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 4.4% | -18% | $45,390,842 | -$9,237,154 | 21,210,674 | -17% | Hotchkis and Wiley Capital Management, LLC | 30 Jun 2025 |
| Grantham, Mayo, Van Otterloo & Co. LLC | 3.2% | -59% | $50,712,379 | -$45,630,900 | 18,307,718 | -47% | Grantham, Mayo, Van Otterloo & Co. LLC | 31 Mar 2026 |
| AMERICAN CENTURY INVESTMENT MANAGEMENT INC | 2.4% | -66% | $14,012,882 | -$27,416,815 | 11,300,711 | -66% | American Century Investment Management, Inc. | 31 Dec 2025 |
| FMR LLC | 2.1% | $16,907,343 | 9,829,851 | FMR LLC | 29 Nov 2024 | |||
| BlackRock Portfolio Management LLC | 1.7% | -77% | $7,523,689 | -$19,976,061 | 8,291,480 | -73% | BlackRock Portfolio Management LLC | 31 Dec 2025 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. | 0.84% | -90% | $6,933,604 | -$36,259,955 | 4,031,165 | -84% | Vaughan Nelson Investment Management, L.P. | 31 Mar 2025 |
As of 31 Mar 2026, 258 institutional investors reported holding 433,552,356 shares of Kosmos Energy Ltd. - Common Stock (KOS). This represents 75% of the company’s total 579,358,165 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
56%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8.2% | 47,463,094 | +1.3% | 0% | $131,947,401 |
| STATE STREET CORP | 4.9% | 28,247,797 | +38% | 0% | $78,528,876 |
| Equinox Partners Investment Management LLC | 3.6% | 20,678,033 | +6.2% | 23% | $57,484,932 |
| D. E. Shaw & Co., Inc. | 3.5% | 20,385,745 | +242% | 0.04% | $56,672,372 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 3.5% | 20,051,601 | -0.29% | 0.17% | $55,743,451 |
| TWO SIGMA INVESTMENTS, LP | 3.2% | 18,680,328 | +385% | 0.04% | $51,931,312 |
| Grantham, Mayo, Van Otterloo & Co. LLC | 3.2% | 18,307,718 | -47% | 0.13% | $50,895,456 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 2.4% | 14,135,448 | +17% | 0.01% | $39,296,545 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.2% | 12,714,055 | +13% | 0% | $35,352,863 |
| MILLENNIUM MANAGEMENT LLC | 2.2% | 12,632,904 | -15% | 0.03% | $35,119,473 |
| JANE STREET GROUP, LLC | 2% | 11,743,115 | +27% | 0.04% | $32,645,859 |
| Invesco Ltd. | 1.9% | 11,150,239 | +496% | 0% | $30,997,665 |
| GOLDMAN SACHS GROUP INC | 1.6% | 9,261,696 | +37% | 0% | $25,747,514 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.5% | 8,619,103 | 0% | 0% | $23,961,106 |
| Davidson Kempner Capital Management LP | 1.5% | 8,419,986 | 0.5% | $23,407,561 | |
| FIRST TRUST ADVISORS LP | 1.3% | 7,694,248 | +9.2% | 0.02% | $21,390,009 |
| DIMENSIONAL FUND ADVISORS LP | 1.2% | 7,083,075 | +20% | 0% | $19,699,423 |
| M&G PLC | 1.2% | 7,031,872 | -20% | 0.11% | $21,095,616 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.1% | 6,422,390 | 0% | 0% | $17,854,244 |
| Russell Investments Group, Ltd. | 1% | 5,857,655 | -0.48% | 0.02% | $16,284,280 |
| MORGAN STANLEY | 1% | 5,837,077 | +24% | 0% | $16,227,075 |
| BANK OF AMERICA CORP /DE/ | 0.96% | 5,541,020 | +44% | 0% | $15,404,036 |
| RENAISSANCE TECHNOLOGIES LLC | 0.92% | 5,339,638 | +224% | 0.02% | $14,844,194 |
| UBS Group AG | 0.83% | 4,812,090 | -22% | 0% | $13,377,610 |
| Boston Partners | 0.82% | 4,756,571 | 0.01% | $13,346,008 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
31
Latest
Q1 2026
Rows shown
1-25 of 31
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 433,552,356 | $1,207,550,621 | +$253,890,609 | $2.78 | 258 |
| 2025 Q4 | 341,624,965 | $310,785,907 | -$58,814,526 | $0.91 | 207 |
| 2025 Q3 | 397,567,149 | $662,697,681 | -$27,310,559 | $1.66 | 232 |
| 2025 Q2 | 414,211,641 | $714,259,765 | -$53,936,011 | $1.72 | 222 |
| 2025 Q1 | 435,420,001 | $990,831,898 | -$24,178,044 | $2.28 | 247 |
| 2024 Q4 | 434,467,418 | $1,483,228,559 | -$41,595,189 | $3.42 | 266 |
| 2024 Q3 | 445,143,829 | $1,793,908,427 | -$35,616,618 | $4.03 | 264 |
| 2024 Q2 | 446,530,055 | $2,476,397,361 | -$48,197,743 | $5.54 | 267 |
| 2024 Q1 | 455,144,754 | $2,712,853,408 | +$129,674,838 | $5.96 | 242 |
| 2023 Q4 | 432,591,755 | $2,903,078,114 | -$14,250,348 | $6.71 | 243 |
| 2023 Q3 | 431,942,937 | $3,529,846,448 | +$111,284,980 | $8.18 | 221 |
| 2023 Q2 | 420,903,235 | $2,522,367,786 | -$29,709,707 | $5.99 | 235 |
| 2023 Q1 | 424,739,511 | $3,157,589,069 | +$162,486,630 | $7.44 | 230 |
| 2022 Q4 | 403,898,858 | $2,569,050,464 | +$18,268,299 | $6.36 | 233 |
| 2022 Q3 | 398,851,012 | $2,063,155,651 | +$16,879,335 | $5.17 | 214 |
| 2022 Q2 | 394,546,108 | $2,441,878,683 | -$2,958,258 | $6.19 | 220 |
| 2022 Q1 | 394,415,075 | $2,834,637,427 | +$148,440,024 | $7.19 | 195 |
| 2021 Q4 | 375,249,027 | $1,298,202,086 | +$192,827,880 | $3.46 | 163 |
| 2021 Q3 | 319,646,092 | $943,564,890 | -$17,871,692 | $2.96 | 151 |
| 2021 Q2 | 324,685,181 | $1,117,940,409 | -$10,284,939 | $3.46 | 162 |
| 2021 Q1 | 328,137,069 | $1,006,040,087 | +$13,891,889 | $3.07 | 133 |
| 2020 Q4 | 323,688,887 | $756,831,249 | -$2,539,903 | $2.35 | 125 |
| 2020 Q3 | 326,413,372 | $320,421,360 | -$20,793,540 | $0.98 | 121 |
| 2020 Q2 | 341,416,082 | $574,126,979 | +$15,634,738 | $1.66 | 143 |
| 2020 Q1 | 338,225,456 | $304,731,750 | -$203,393,161 | $0.90 | 148 |