Kosmos Energy KOS Institutional Ownership

NYSE KOS

$2.68 -0.08 (-2.90%)

As of: Oct 21, 2026 · 11:41 AM EDT

Institutions by Trading Activity

267 Institutions

Increased 168 62.9%

Unchanged 34 12.7%

Reduced 65 24.3%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

72.36%

▼-0.78 pp QoQ

Shares Held by Institutions

430.92Mn

of 595.49Mn outstanding

▼-0.68% QoQ

Shares Outstanding

595.49Mn

164.57Mn held outside 13F filers

Institutional Investors

267

filed 13F for Jun 2026

▲+7 vs prior quarter

Net Shares Added (QoQ)

-2.95Mn

distributed since last quarter

Value of Holdings

$1.15Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Kosmos Energy Ltd. (NYSE:KOS) appeared in the 13F filings of 267 institutional investors for the quarter ended June 30, 2026.

These investors held 72.36% of Kosmos Energy's outstanding shares at the end of Q2 2026, down from 73.14% in Q1 2026.
Total shares held in Kosmos Energy fell 0.68% from Q1 2026, while the number of holders rose 19.20% from Q2 2025.
Looking at the 267 holders of KOS individually, 168 added to their positions, 65 reduced their stakes and 34 left their positions unchanged.
Institutional investors held 430.92Mn shares of Kosmos Energy in total at the end of Q2 2026, down 2.95Mn from the prior quarter and up 30.78Mn from a year earlier.
As of June 30, 2026, the biggest holder of Kosmos Energy was BlackRock, Inc. with 56.02Mn shares, or 9.41% of shares outstanding.
The biggest increases in KOS positions during Q2 2026 came from BlackRock, Inc. (+8.56Mn shares), American Century Companies Inc (+7.94Mn shares), Two Sigma Investments, LP (+6.72Mn shares), Geode Capital Management, LLC (+4.35Mn shares) and D. E. Shaw & Co., Inc. (+4.15Mn shares).
On the other side, among holders that kept a position in Kosmos Energy, the largest reductions in Q2 2026 came from Jane Street Group, LLC (-11.65Mn shares), Grantham, Mayo, Van Otterloo & Co. LLC (-6.46Mn shares), Millennium Management LLC (-5.2Mn shares), Citadel Advisors LLC (-4.26Mn shares) and First Trust Advisors LP (-3.68Mn shares).
According to Business Quant data, the leading holders of KOS for Q2 2026 were BlackRock, Inc. (56.02Mn shares), State Street Corp (29.45Mn shares), Two Sigma Investments, LP (25.4Mn shares), D. E. Shaw & Co., Inc. (24.54Mn shares), Equinox Partners Investment Management LLC (20.68Mn shares), Hotchkis & Wiley Capital Management LLC (18.84Mn shares), Geode Capital Management, LLC (17.07Mn shares), Charles Schwab Investment Management Inc (13.77Mn shares), Vanguard Portfolio Management LLC (12Mn shares) and Grantham, Mayo, Van Otterloo & Co. LLC (11.85Mn shares).

Form 13F Holdings

267 Institutional Holders

Report period 30 Jun, 2026

Total shares held 430.92Mn

Of outstanding 72.36%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	56,023,521	9.41%	▲8,560,427	+18.04%	$118.21Mn
2	State Street Corp	0000093751	29,453,016	4.95%	▲1,205,219	+4.27%	$62.15Mn
3	TWO SIGMA INVESTMENTS, LP	0001179392	25,398,092	4.27%	▲6,717,764	+35.96%	$53.59Mn
4	D. E. Shaw & Co., Inc.	0001009207	24,538,308	4.12%	▲4,152,563	+20.37%	$51.78Mn
5	Equinox Partners Investment Management LLC	0000938552	20,678,033	3.47%	0	0.00%	$43.63Mn
6	HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC	0001164833	18,844,781	3.16%	▼1,206,820	-6.02%	$39.76Mn
7	GEODE CAPITAL MANAGEMENT, LLC	0001214717	17,066,608	2.87%	▲4,352,553	+34.23%	$36.02Mn
8	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	13,769,666	2.31%	▼365,782	-2.59%	$29.05Mn
9	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	12,000,418	2.02%	▲3,381,315	+39.23%	$25.32Mn
10	Grantham, Mayo, Van Otterloo & Co. LLC	0001352662	11,850,124	1.99%	▼6,457,594	-35.27%	$25.00Mn
11	Invesco Ltd.	0000914208	10,949,038	1.84%	▼201,201	-1.80%	$23.10Mn
12	DIMENSIONAL FUND ADVISORS LP	0000354204	9,582,883	1.61%	▲2,499,808	+35.29%	$20.22Mn
13	Goldman Sachs Group Inc	0000886982	8,531,947	1.43%	▼729,749	-7.88%	$18.00Mn
14	AMERICAN CENTURY COMPANIES INC	0000748054	8,036,479	1.35%	▲7,938,277	+8,083.62%	$16.96Mn
15	DAVIDSON KEMPNER CAPITAL MANAGEMENT LP	0001595082	8,000,323	1.34%	▼419,663	-4.98%	$16.88Mn
16	MILLENNIUM MANAGEMENT LLC	0001273087	7,429,695	1.25%	▼5,203,209	-41.19%	$15.68Mn
17	M&G Plc	0001802539	7,409,687	1.24%	▲377,815	+5.37%	$14.82Mn
18	Morgan Stanley	0000895421	7,360,428	1.24%	▲1,523,351	+26.10%	$15.53Mn
19	Nuveen, LLC	0001871926	7,330,487	1.23%	▲4,015,843	+121.15%	$15.47Mn
20	RENAISSANCE TECHNOLOGIES LLC	0001037389	7,008,668	1.18%	▲1,669,030	+31.26%	$14.79Mn

Showing 1 to 20 of 267 holders