$KOS

$2.77 -$0.08 (2.81%) Close

$KOS Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 595.5M shares outstanding

Who owns KOS?

By type of holder

Institutions 71.6% Insiders 2.6% Everyone else 25.8%

Concentration Top 10 holders own 37.8%

BlackRock, Inc. 9.4% · State Street Corp 5.0%

Institutional ownership

71.6%

-1.3 pts vs last qtr

Institutional holders

265

+3 vs last qtr

Net shares bought

−7.7M

by institutions in Q2 2026

New / sold out

51 / 48

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

BlackRock, Inc. +8.6M
American Century Companies Inc +7.9M

Biggest sellers in Q2 2026

Jane Street Group, LLC −11.6M
Grantham, Mayo, Van Otterloo & Co. LLC −6.5M

Who is planning to sell?

Notices of proposed sale, last 12 months

$2.5M

17 notices from 8 people

Shares covered

2.0M

0.34% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Christopher James Ball Former officer $1.43M
Inglis Andrew G Officer $383K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+23.9%

+2.41% a year

Each share's claim on the business

−19.3%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$210M vs $355M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years64% 3–5 years5% 1–3 years18% Under 1 year12%

Quarterly turnover

18.2%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting KOS on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	56.0M	9.41%	+8.6M (+18.0%)	≤2021	0.0%
Shares held by quarter Peak holding68.9M (Q3'25) Change over 8 quarters+5.9M Share of the company9.410% BlackRock, Inc.'s full portfolio →
SS State Street Corp	29.5M	4.95%	+1.2M (+4.3%)	≤2021	0.0%
Shares held by quarter Peak holding29.5M (Q2'26) Change over 8 quarters+10.8M Share of the company4.950% State Street Corp's full portfolio →

BlackRock, Inc.

56.0M

% of company

9.41%

Change vs last qtr

+8.6M (+18.0%)

Held since

≤2021

State Street Corp

29.5M

% of company

4.95%

Change vs last qtr

+1.2M (+4.3%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Kosmos Energy Ltd., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting KOS on Form N-PORT; together they hold 27.8% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
SS State Street(R) SPDR(R) S&P(R) Oil & Gas Exploration & Production ETF SPDR Series Trust	$33.3M	15.8M	2.65%	1.14%	June 30, 2026
IR iShares Russell 2000 ETF iShares Trust	$32.5M	15.4M	2.59%	0.04%	June 30, 2026

State Street(R) SPDR(R) S&P(R) Oil & Gas Exploration & Production ETF

SPDR Series Trust

Position value

$33.3M

% of company

2.65%

% of the fund

1.14%

As of

June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$32.5M

% of company

2.59%

% of the fund

0.04%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Kosmos Energy Ltd. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
OA Ogunlesi Adebayo O. Insider	5.0M	0.85%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.850% Ogunlesi Adebayo O.'s insider activity →
IA Inglis Andrew G Insider	4.7M	0.79%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.790% Inglis Andrew G's insider activity →

Ogunlesi Adebayo O.

Insider

5.0M

% of company

0.85%

Change vs last qtr

—

Held since

—

Inglis Andrew G

Insider

4.7M

% of company

0.79%

Change vs last qtr

—

Held since

—

10 more holders behind a free account

See every insider and 5%+ holder of Kosmos Energy Ltd..

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