Company · Ownership research

ECOPETROL S.A. EC

CIK 0001444406 · CUSIP 279158109

Insider tradingInitial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 279158109 (EC), not CUSIP 279158909 (EC), CUSIP 279158959 (EC), and does not merge CUSIPs.

This page lists the top 20 of 165 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$40.92M 2,729,497 shares	0.00%	+1.20M(+78.70%)Added	SEC filing ↗ May 13, 2026	▾
02	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$27.78M 1,853,290 shares	0.02%	+525.29K(+39.60%)Added	SEC filing ↗ May 15, 2026	▾
03	VANGUARD FIDUCIARY TRUST CO CIK 933478 · Amended · View history	$27.19M 1,813,818 shares	0.01%	—	SEC filing ↗ May 8, 2026	▾
04	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$24.95M 1,664,736 shares	0.00%	+256.85K(+18.20%)Added	SEC filing ↗ May 15, 2026	▾
05	Connor, Clark & Lunn Investment Management Ltd. CIK 1596800 · View history	$23.22M 1,548,879 shares	0.05%	+1.55MNew	SEC filing ↗ May 11, 2026	▾
06	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$19.00M 1,267,720 shares	0.01%	+577.15K(+83.60%)Added	SEC filing ↗ May 15, 2026	▾
07	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$18.02M 1,202,093 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
08	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$13.25M 884,068 shares	0.01%	+300.72K(+51.60%)Added	SEC filing ↗ May 15, 2026	▾
09	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$13.22M 881,890 shares	0.00%	-53.75K(-5.70%)Reduced	SEC filing ↗ May 15, 2026	▾
10	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$9.47M 632,268 shares	0.00%	+525.72K(+493.40%)Added	SEC filing ↗ May 13, 2026	▾
11	MARSHALL WACE, LLP CIK 1318757 · View history	$8.55M 570,295 shares	0.01%	+414.38K(+265.80%)Added	SEC filing ↗ May 15, 2026	▾
12	Truffle Hound Capital, LLC CIK 1595862 · View history	$8.24M 550,000 shares	5.05%	0(0.00%)Unchanged	SEC filing ↗ May 7, 2026	▾
13	MORGAN STANLEY CIK 895421 · View history	$8.06M 537,590 shares	0.00%	-107.79K(-16.70%)Reduced	SEC filing ↗ May 15, 2026	▾
14	JANE STREET GROUP, LLC CIK 1595888 · View history	$7.67M 511,390 shares	0.01%	+316.60K(+162.50%)Added	SEC filing ↗ May 12, 2026	▾
15	Aventail Capital Group, LP CIK 1803822 · View history	$6.90M 460,202 shares	0.33%	+460.20KNew	SEC filing ↗ May 15, 2026	▾
16	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$6.54M 436,454 shares	0.00%	+436.45KNew	SEC filing ↗ May 14, 2026	▾
17	STATE STREET CORP CIK 93751 · View history	$5.42M 361,552 shares	0.00%	+38.66K(+12.00%)Added	SEC filing ↗ May 15, 2026	▾
18	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$4.86M 324,058 shares	0.00%	-2.27M(-87.50%)Reduced	SEC filing ↗ May 15, 2026	▾
19	Fisher Asset Management, LLC CIK 850529 · View history	$4.85M 323,521 shares	0.00%	-121.74K(-27.30%)Reduced	SEC filing ↗ May 5, 2026	▾
20	XTX Topco Ltd CIK 1828301 · View history	$4.68M 312,103 shares	0.08%	+184.19K(+144.00%)Added	SEC filing ↗ May 15, 2026	▾

Showing 20 / 165 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

165

Cancelled or null records excluded

Disclosed shares

25,900,044

Not deduplicated across managers

Disclosed value

$388.07M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

ECOPETROL S.A. · Q1 2026

Explore all 165 reporting institutions.

This page includes 20 of 165 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

Download CSV
Earlier quarters
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 165 reporting institutions; totals use the complete disclosed data.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_institutional_holdings
{"action":"holders","cusip":"279158109","quarter":"2026Q1","type":"positions","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.