Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

GRAN TIERRA ENERGY INC.

CIK 0001273441GTE· quarter ending 2026-06-30

Shares outstanding

35,380,429

as of 2026-07-31 · 10-Q cover page, filed 2026-08-05

Held by 13F filers

22,930,190

64.8% of shares outstanding

Holders

-2 vs 2026-03-31 · 12 new, 14 exited

Value

$143.3M

shares +4.9% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-05, as of 2026-07-31)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	GTE · NYSEAMER	35,380,429	22,930,190	64.8%	69	38500T200

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	38500T200	COM	69	22,930,190	35,380,429	64.8%	$143.3M	4 call / 4 put	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings. 3 further CUSIPs map to this company (mostly bonds) but no 13F filer held them this quarter.

Top holders (69 of 69 · 38500T200)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	Equinox Partners Investment Management LLC	6,381,471	18.04%	$39.9M	—
2	LM Asset Management Inc.	4,365,420	12.34%	$27.3M	+320,000 (+7.9%)
3	AMERICAN CENTURY COMPANIES INC	1,702,578	4.81%	$10.6M	+93,428 (+5.8%)
4	TWO SIGMA INVESTMENTS, LP	1,385,858	3.92%	$8.7M	+426,944 (+44.5%)
5	D. E. Shaw & Co., Inc.	1,158,224	3.27%	$7.2M	+58,018 (+5.3%)
6	RENAISSANCE TECHNOLOGIES LLC	960,360	2.71%	$6.0M	+183,680 (+23.6%)
7	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	803,763	2.27%	$5.0M	+199,386 (+33.0%)
8	BRIDGEWAY CAPITAL MANAGEMENT, LLC	575,603	1.63%	$3.6M	+19,687 (+3.5%)
9	Connor, Clark & Lunn Investment Management Ltd.	523,877	1.48%	$3.3M	+117,381 (+28.9%)
10	UBS Group AG	505,894	1.43%	$3.2M	+82,950 (+19.6%)
11	BNP PARIBAS FINANCIAL MARKETS	467,826	1.32%	$2.9M	+125,106 (+36.5%)
12	DIMENSIONAL FUND ADVISORS LP	437,209	1.24%	$2.7M	+202,364 (+86.2%)
13	MORGAN STANLEY	411,141	1.16%	$2.6M	+163,039 (+65.7%)
14	CITADEL ADVISORS LLC	404,578	1.14%	$2.5M	+20,847 (+5.4%)
15	Empowered Funds, LLC	360,592	1.02%	$2.3M	+39,000 (+12.1%)
16	MILLENNIUM MANAGEMENT LLC	333,190	0.94%	$2.1M	+83,150 (+33.3%)
17	JPMORGAN CHASE & CO	280,682	0.79%	$1.7M	+3,466 (+1.3%)
18	FIRST TRUST ADVISORS LP	180,984	0.51%	$1.1M	NEW
19	Quadrature Capital Ltd	160,292	0.45%	$1.0M	-15,306 (-8.7%)
20	ACADIAN ASSET MANAGEMENT LLC	143,614	0.41%	$891K	NEW
21	Jump Financial, LLC	126,998	0.36%	$794K	-249,837 (-66.3%)
22	Squarepoint Ops LLC	92,661	0.26%	$579K	NEW
23	BlackRock, Inc.	92,309	0.26%	$577K	-59,840 (-39.3%)
24	JANE STREET GROUP, LLC	89,358	0.25%	$558K	-137,840 (-60.7%)
25	GOLDMAN SACHS GROUP INC	72,144	0.20%	$451K	-3,005 (-4.0%)
26	Susquehanna Portfolio Strategies, LLC	70,461	0.20%	$440K	—
27	BANK OF AMERICA CORP /DE/	69,180	0.20%	$432K	NEW
28	Cresset Asset Management, LLC	65,850	0.19%	$412K	—
29	Point72 Asset Management, L.P.	60,118	0.17%	$375K	-314,269 (-83.9%)
30	XTX Topco Ltd	58,674	0.17%	$367K	+15,044 (+34.5%)
31	Schonfeld Strategic Advisors LLC	51,248	0.14%	$320K	-47,118 (-47.9%)
32	GAM Holding AG	50,000	0.14%	$313K	—
33	GROUP ONE TRADING LLC	44,753	0.13%	$280K	-11,419 (-20.3%)
34	Campbell & CO Investment Adviser LLC	44,575	0.13%	$279K	NEW
35	Graham Capital Management, L.P.	38,260	0.11%	$239K	-885 (-2.3%)
36	EXCHANGE TRADED CONCEPTS, LLC	37,519	0.11%	$234K	+11,163 (+42.4%)
37	BARCLAYS PLC	30,313	0.09%	$189K	-17,315 (-36.4%)
38	Brevan Howard Capital Management LP	30,248	0.09%	$189K	+11,240 (+59.1%)
39	SG Americas Securities, LLC	29,012	0.08%	$181K	+11,853 (+69.1%)
40	BANK OF MONTREAL /CAN/	27,543	0.08%	$172K	+149 (+0.5%)
41	PDT Partners, LLC	27,364	0.08%	$171K	—
42	HSBC HOLDINGS PLC	24,573	0.07%	$154K	-2,210 (-8.3%)
43	Y-Intercept (Hong Kong) Ltd	24,326	0.07%	$152K	NEW
44	OCCUDO QUANTITATIVE STRATEGIES LP	22,358	0.06%	$140K	+11,371 (+103.5%)
45	AXQ CAPITAL, LP	18,835	0.05%	$118K	-20,851 (-52.5%)
46	State of Wyoming	16,795	0.05%	$105K	NEW
47	Engineers Gate Manager LP	12,311	0.03%	$77K	-4,529 (-26.9%)
48	OXFORD ASSET MANAGEMENT LLP	10,912	0.03%	$68K	-21,195 (-66.0%)
49	MARSHALL WACE, LLP	10,600	0.03%	$66K	NEW
50	Walleye Capital LLC	9,648	0.03%	$60K	+3,937 (+68.9%)
51	ROYAL BANK OF CANADA	5,231	0.01%	$32K	-14,461 (-73.4%)
52	Caitong International Asset Management Co., Ltd	4,649	0.01%	$29K	NEW
53	NATIONAL BANK OF CANADA /FI/	4,615	0.01%	$41K	+1,520 (+49.1%)
54	SIMPLEX TRADING, LLC	3,817	0.01%	$24K	+1,178 (+44.6%)
55	OSAIC HOLDINGS, INC.	3,420	0.01%	$21K	+1,500 (+78.1%)
56	US BANCORP \DE\	1,500	0.00%	$9K	NEW
57	SIGNATUREFD, LLC	1,232	0.00%	$8K	+308 (+33.3%)
58	JONES FINANCIAL COMPANIES LLLP	1,091	0.00%	$7K	—
59	TD Waterhouse Canada Inc.	1,000	0.00%	$6K	+900 (+900.0%)
60	CITIGROUP INC	990	0.00%	$6K	-4,041 (-80.3%)
61	Farther Finance Advisors, LLC	176	0.00%	$1K	NEW
62	Federation des caisses Desjardins du Quebec	109	0.00%	$675	+30 (+38.0%)
63	SBI Securities Co., Ltd.	105	0.00%	$656	-2 (-1.9%)
64	WELLS FARGO & COMPANY/MN	72	0.00%	$450	+7 (+10.8%)
65	Activest Wealth Management	61	0.00%	$381	—
66	Optiver Holding B.V.	10	0.00%	$62	—
67	Bogart Wealth, LLC	7	0.00%	$44	—
68	Medallion Wealth Advisors, LLC	2	0.00%	$13	—
69	Evelyn Partners Group Ltd	1	0.00%	$6	NEW

Exited since 2026-03-31 (14 filers; largest 14 shown)

PRELUDE CAPITAL MANAGEMENT, LLC	−202,534
JANUS HENDERSON GROUP PLC	−168,883
Quantbot Technologies LP	−83,734
Cygnus Capital Advisors, LLC	−81,610
SUSQUEHANNA INTERNATIONAL GROUP, LLP	−57,763
HRT FINANCIAL LP	−50,425
Dynamic Technology Lab Private Ltd	−39,944
STIFEL FINANCIAL CORP	−37,008
WINTON GROUP Ltd	−29,536
Virtu Financial LLC	−18,447
NORTHERN TRUST CORP	−18,413
nVerses Capital, LLC	−15,879
Tower Research Capital LLC (TRC)	−2,635
Evelyn Partners Investment Management (Europe) Ltd	−1

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Sean M. Fieler	SCHEDULE 13G/A	2026-09-17	2026-09-11	1,533,793	4.3%
Mason Hill Partners, LP	SCHEDULE 13G/A	2026-09-17	2026-09-11	155,102	0.4%
Equinox Partners Investment Management LLC	SCHEDULE 13G/A	2026-09-17	2026-09-11	1,533,793	4.3%
Equinox Partners, L.P.	SCHEDULE 13G/A	2026-09-17	2026-09-11	611,231	1.7%
Kuroto Fund LP	SCHEDULE 13G/A	2026-09-17	2026-09-11	156,116	0.4%
LM Asset Management Inc.	SCHEDULE 13G/A	2026-08-12	2026-06-30	4,365,420	12.3%
Daniel Lau	SCHEDULE 13G/A	2026-08-12	2026-06-30	4,812,420	13.6%
LM Asset Fund Limited Partnership	SCHEDULE 13G/A	2026-08-12	2026-06-30	2,847,800	8.1%
LM Asset General Partner Ltd.	SCHEDULE 13G/A	2026-08-12	2026-06-30	3,648,020	10.3%
Christine Man	SCHEDULE 13G/A	2026-08-12	2026-06-30	4,637,970	13.1%
LM Asset (IM) Inc.	SCHEDULE 13G/A	2025-12-19	2025-12-17	3,671,200	10.4%
Encompass Capital Partners LLC	SCHEDULE 13G/A	2025-11-14	2025-09-30	0	0%
Encompass Capital Advisors LLC	SCHEDULE 13G/A	2025-11-14	2025-09-30	0	0%
Todd J. Kantor	SCHEDULE 13G/A	2025-11-14	2025-09-30	0	0%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.