Gran Tierra Energy

GTE • AMEX

Gran Tierra Energy is a oil & gas exploration & production company in the energy sector on AMEX, led by Gary S. Guidry, with a market cap of $137.7M. As of Q3 2025, 43% of shares are held by 58 institutional investors, with MASON HILL ADVISORS LLC as the largest holder at 14.44%.

Chief Operating OfficerGary S. Guidry

Market Cap$137.7M

Oil & Gas Exploration & Production

Energy

Employees351.0

Websitegrantierra.com

Country

United States of America

Overview

Overview of institutional ownership in GTE as of Q3 2025 with a market cap of $153.5M

All Institutions

Institutions: 58
Value Held: $66.1M
Shares Held: 15.2M
Avg Position: $1.1M
Median Position: $239.8K

Hedge Funds

Hedge Funds: 9
Value Held: $27.6M
Shares Held: 6.3M
Avg Position: $3.1M
Median Position: $247.3K

Ownership Breakdown

Institutional (non-HF)

25.13%

$38.6M

Hedge Funds

17.95%

$27.6M

Retail & Other

56.92%

$87.4M

Based on market cap of $153.5M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in GTE as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
MASON HILL ADVISORS LLC Hedge Fund•Value	Sean Michael Fieler President	$22.2M 11.97% of portfolio	14.44% 5.1M shares	Q2 2024 Held for 1y 5m	$185.2M
L LM Asset Inc. Institution	-	$12.1M 9.44% of portfolio	7.91% 2.8M shares	Q4 2024 Held for 11 months	$128.6M
A AMERICAN CENTURY COMPANIES INC Institution	-	$6.6M 0.00% of portfolio	4.30% 1.5M shares	Q2 2023 Held for 2y 5m	$195.93B
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	Peter Fitzhugh Brown CEO	$3.5M 0.00% of portfolio	2.27% 799.9K shares	≤ Q2 2013 Held for 12y 5m+	$75.8B
R RWC Asset Management LLP Institution	-	$3.3M 0.19% of portfolio	2.19% 772.5K shares	Q2 2019 Held for 6y 5m	$1.8B
B BRIDGEWAY CAPITAL MANAGEMENT INC Long Only Manager	John Noland Ryan Montgomery CEO	$2.4M 0.05% of portfolio	1.57% 554.3K shares	≤ Q2 2013 Held for 12y 5m+	$4.7B
Connor, Clark & Lunn Investment Management Ltd. Long Only Manager	John Wyatt Ricketts President	$1.6M 0.01% of portfolio	1.06% 375.3K shares	Q4 2015 Held for 9y 11m	$31.7B
B BlackRock, Inc. Institution	-	$1.5M 0.00% of portfolio	1.00% 352.4K shares	Q1 2021 Held for 4y 8m	$5.67T
Empowered Funds, LLC ETF Provider	Wesley Robert Gray CEO	$1.2M 0.01% of portfolio	0.79% 279.2K shares	Q2 2024 Held for 1y 5m	$9.9B
R RWC ASSET ADVISORS LLC Institution	-	$971.9K 0.16% of portfolio	0.64% 226.1K shares	Q3 2018 Held for 7y 2m	$610.9M

Net Capital Flow

Institutional buying and selling activity for GTE in Q3 2025

Traded: −$9.2M
Buyers: 25
Sellers: 32
Total Bought: +$8.7M
Total Sold: −$17.9M
Avg Position: $893.7K

Biggest Buyers

Institution	Net Bought	Current Position
L LM Asset Inc. Institution	+$3.7M +846.0K shares	$12.1M 2.8M shares
B BlackRock, Inc. Institution	+$715.8K +164.5K shares	$1.5M 352.4K shares
GSA CAPITAL PARTNERS LLP Hedge Fund•Quant	+$632.8K +145.5K shares	$632.8K 145.5K shares
A AMERICAN CENTURY COMPANIES INC Institution	+$468.8K +107.8K shares	$6.6M 1.5M shares
J Jump Financial, LLC Institution	+$386.7K +88.9K shares	$386.7K 88.9K shares
Q Quadrature Capital Ltd Institution	+$357.9K +82.9K shares	$409.0K 94.7K shares
Marshall Wace LLP Institution	+$342.3K +78.7K shares	$430.6K 99.0K shares
D D. E. Shaw & Co., Inc. Institution	+$336.6K +77.4K shares	$454.4K 104.5K shares
C Cubist Systematic Strategies, LLC Institution	+$261.7K +60.2K shares	$587.0K 135.0K shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	+$202.9K +46.6K shares	$433.5K 99.7K shares

Biggest Sellers

Institution	Net Sold	Current Position
Encompass Capital Advisors LLC Hedge Fund•Long/Short	−$11.4M −2.4M shares	Sold Off 0 shares
U Universal- Beteiligungs- und Servicegesellschaft mbH Institution	−$2.2M −461.5K shares	Sold Off 0 shares
GMT CAPITAL CORP Hedge Fund•Long/Short	−$1.4M −300.0K shares	Sold Off 0 shares
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	−$484.3K −111.3K shares	$119.4K 27.4K shares
TWO SIGMA ADVISERS, LLC Hedge Fund•Multi-Strategy	−$457.3K −105.1K shares	$239.3K 55.0K shares
Invesco Ltd. ETF Provider	−$394.1K −90.6K shares	$304.2K 69.9K shares
E EXCHANGE TRADED CONCEPTS, LLC Institution	−$200.3K −42.0K shares	Sold Off 0 shares
S SIMPLEX TRADING, LLC Institution	−$187.3K −43.0K shares	$21.8K 5.0K shares
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	−$164.9K −34.6K shares	Sold Off 0 shares
R ROYAL BANK OF CANADA Institution	−$148.7K −34.2K shares	$241.2K 55.5K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited GTE in Q3 2025

New Positions: 1
New Value: $191.8K
Exited Positions: 16
Exited Value: $15.8M

New Positions

Institution	Position Value
Susquehanna Portfolio Strategies, LLC Private Equity	$191.8K 44.1K shares

Exited Positions

Institution	Previous Position
Encompass Capital Advisors LLC Hedge Fund•Long/Short	$11.4M 2.4M shares
U Universal- Beteiligungs- und Servicegesellschaft mbH Institution	$2.2M 461.5K shares
GMT CAPITAL CORP Hedge Fund•Long/Short	$1.4M 300.0K shares
E EXCHANGE TRADED CONCEPTS, LLC Institution	$200.3K 42.0K shares
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$164.9K 34.6K shares
Creative Planning RIA/Wealth	$116.8K 24.5K shares
Engineers Gate Manager LP Hedge Fund•Quant	$94.9K 19.9K shares
X XTX Topco Ltd Institution	$92.3K 19.4K shares
S Skopos Labs, Inc. RIA/Wealth	$36.6K 7.7K shares
P PRIVATE TRUST CO NA Institution	$33.4K 7.0K shares

Options Activity

Institutions with the largest Call and Put options positions in GTE as of Q3 2025

Call Positions: 4
Call Value: $51.8K
Put Positions: 3
Put Value: -

Call Positions

Institution	Position Value
J JANE STREET GROUP, LLC Institution	$51.8K 119.0 contracts
W WOLVERINE TRADING, LLC Institution	- - contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	- - contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	- - contracts

Put Positions

Institution	Position Value
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	- - contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	- - contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	- - contracts

Most Committed Institutions

Institutions with GTE as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
MASON HILL ADVISORS LLC Hedge Fund•Value	Sean Michael Fieler President	11.97% $22.2M	14.44% 5.1M shares	Q2 2024 Held for 1y 5m	$185.2M
L LM Asset Inc. Institution	-	9.44% $12.1M	7.91% 2.8M shares	Q4 2024 Held for 11 months	$128.6M
R RWC Asset Management LLP Institution	-	0.19% $3.3M	2.19% 772.5K shares	Q2 2019 Held for 6y 5m	$1.8B
R RWC ASSET ADVISORS LLC Institution	-	0.16% $971.9K	0.64% 226.1K shares	Q3 2018 Held for 7y 2m	$610.9M
GSA CAPITAL PARTNERS LLP Hedge Fund•Quant	David Khabie-Zeitoune CEO	0.06% $632.8K	0.41% 145.5K shares	≤ Q2 2013 Held for 12y 5m+	$1.1B
R Squared Ltd Private Equity	-	0.05% $126.8K	0.08% 29.2K shares	Q4 2024 Held for 11 months	$232.5M
B BRIDGEWAY CAPITAL MANAGEMENT INC Long Only Manager	John Noland Ryan Montgomery CEO	0.05% $2.4M	1.57% 554.3K shares	≤ Q2 2013 Held for 12y 5m+	$4.7B
VICTORY FINANCIAL GROUP, LLC RIA/Wealth	Jeffrey Wayne Davidson Founder	0.01% $106.5K	0.07% 24.5K shares	Q4 2024 Held for 11 months	$724.8M
Empowered Funds, LLC ETF Provider	Wesley Robert Gray CEO	0.01% $1.2M	0.79% 279.2K shares	Q2 2024 Held for 1y 5m	$9.9B
Centiva Capital, LP Hedge Fund•Multi-Strategy	Timothy Michael Higgins CFO	0.01% $103.1K	0.07% 23.7K shares	Q3 2025 Held for 2 months	$1.1B

Hedge Fund Spotlight

Discover hedge funds investing in GTE

TWO SIGMA INVESTMENTS LLC

Hedge Fund • Multi-Strategy

Portfolio ManagerScott David Hoffman

Portfolio Value: $62.0B
Positions: 3,252
Last Reported: Q3 2025

Sector Allocation

Position in Gran Tierra Energy

Market Value: $447.7K
Shares Held: 102.9K
Portfolio Weight: 0.00%
Owned Since: 2017-Q4

Top Holding	Sector	Market Value	Weight
1 SPDR S&P 500 ETF Trust SPY	ETF ETF	$680.4M	1.10%
2 Financial Select Sector SPDR Fund XLF	ETF ETF	$582.6M	0.94%
3 Consumer Staples Select Sector SPDR Fund XLP	ETF ETF	$489.6M	0.79%