ECO · Okeanis Eco Tankers Corp. · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 118 13F filersWho Holds ECO
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 117 filers, like-for-like change +2.6%; actively managed books +2.9%; index-like books -1.2%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 44.1% | 59 | +2.7% |
| Exempt adviser | 11.3% | 5 | +10.1% |
| Adviser | 0.5% | 2 | -17.6% |
| Bank | 10.6% | 10 | +4.2% |
| Broker-dealer | 0.3% | 1 | +258.5% |
| Benefit plan | 0.0% | 1 | -81.6% |
| Non-US | 10.0% | 4 | +35.3% |
| Holding company | 6.9% | 6 | -1.8% |
| Unknown | 16.2% | 29 | -13.5% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 6.9% | 6 | -1.2% |
| Systematic-like | 23.3% | 18 | +24.4% |
| Concentrated | 21.6% | 12 | -8.0% |
| Diversified active | 48.2% | 81 | -0.2% |
| Unknown | 0.0% | 0 | — |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 33.6% | 47 | -4.1% |
| Medium turnover | 26.3% | 26 | +29.5% |
| High turnover | 36.3% | 36 | -1.4% |
| Unknown | 3.7% | 8 | -29.7% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 7.2% | 21 | -39.1% |
| Medium horizon | 6.9% | 21 | -23.4% |
| Long horizon | 59.5% | 60 | +18.1% |
| Unknown | 26.4% | 15 | +0.3% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 7.2% | 24 | -29.0% |
| $1B to $10B | 28.5% | 35 | -12.8% |
| $10B to $100B | 19.4% | 31 | 0.0% |
| $100B or more | 44.9% | 27 | +27.2% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 3.7% | 29 | +40.0% |
| Pooled investment vehicles | 37.8% | 24 | +0.9% |
| Registered funds and BDCs | 1.1% | 3 | -31.3% |
| Corporations | 0.0% | 1 | new |
| Governments and sovereign funds | 0.0% | 0 | -100.0% |
| Diversified | 0.6% | 1 | new |
| Unknown | 56.9% | 59 | +3.3% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 35.3% | 32 | +9.0% |
| Private equity funds | 0.0% | 2 | new |
| Real estate funds | 0.0% | 2 | new |
| Other private funds | 15.6% | 4 | +6.5% |
| Private funds, type not stated | 1.1% | 1 | -52.7% |
| No private funds | 3.4% | 23 | -11.5% |
| Mixed private funds | 0.0% | 0 | — |
| Unknown | 44.5% | 53 | +0.8% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 66.3% | 94 | -5.9% |
| Outside the US | 33.7% | 23 | +24.7% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 1 holder with no observed 2026-03-31 13F.
Conviction and Crowding
117 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net sellers of $6,497,206 (0 buying, 1 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 96.7% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies ECO's active holders also own, quarter ended Jun 30, 2026Shareholder Targets
13F filers that own its peers but not ECO, quarter ended Jun 30, 2026Found through its holder-overlap peers: CMBT, HSHP, HAFN, FRO, SBLK, TRMD, INSW, DHT, TNK, TGB, ASC, CNR, BORR, PARR, TIGO, STNG, SEZL, SUNC, BTU, CSTM. 1,171 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | FMR LLC Holding company, Diversified active | $1,965,284,802 19 held | DHT, INSW, SUNC |
| 2 | STATE STREET CORP Bank, Index-like | $1,517,820,560 16 held | CNR, BTU, TIGO |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC Registered adviser, Index-like | $1,104,333,168 14 held | CNR, INSW, FRO |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active | $1,060,827,361 15 held | CNR, BTU, INSW |
| 5 | AMERICAN CENTURY COMPANIES INC Unknown, Diversified active | $903,150,125 14 held | INSW, CSTM, PARR |
| 6 | GEODE CAPITAL MANAGEMENT, LLC Registered adviser, Index-like | $824,379,739 16 held | TIGO, CNR, SEZL |
| 7 | Dodge & Cox Registered adviser, Diversified active | $745,913,964 1 held | TIGO |
| 8 | OAKTREE CAPITAL MANAGEMENT LP Adviser, Concentrated | $529,796,516 1 held | TRMD |
| 9 | RENAISSANCE TECHNOLOGIES LLC Registered adviser, Diversified active | $518,697,642 14 held | BTU, STNG, SBLK |
| 10 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser, Diversified active | $333,137,811 15 held | CNR, PARR, INSW |
Fund Ownership of ECO by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 0.18% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 0.00% | 0 |
| Index ETFs | 0.18% | 68,983 |
| Active ETFs | 0.04% | 15,775 |
| Active funds | 0.03% | 10,570 |
| Unclassified | 0.00% | 859 |
| All registered funds | 0.25% | 96,187 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mid QVT Financial LP Registered adviser | $71,370,729 | 13.97% | 1,423,997 | Shares | 2026-08-14 | |
| Mega FIL Ltd Non-US | $41,569,477 | 8.14% | 829,399 | Shares | 2026-08-13 | |
| Mega BARCLAYS PLC Bank | $28,954,374 | 5.67% | 577,701 | Shares | 2026-08-14 | |
| Large MARSHALL WACE, LLP Exempt adviser | $28,349,976 | 5.55% | 565,642 | Shares | 2026-08-13 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $26,415,144 | 5.17% | 527,038 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $24,479,059 | 4.79% | 488,409 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $21,235,442 | 4.16% | 423,692 | Shares | 2026-08-14 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $20,004,094 | 3.92% | 399,124 | Shares | 2026-08-14 | |
| Mid VR Advisory Services Ltd Registered adviser | $17,227,697 | 3.37% | 343,729 | Shares | 2026-08-14 | |
| Large ACADIAN ASSET MANAGEMENT LLC | $14,576,850 | 2.85% | 290,839 | Shares | 2026-08-13 | |
| Mega JPMORGAN CHASE & CO Bank | $14,268,912 | 2.79% | 284,695 | Shares | 2026-08-12 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser | $13,046,737 | 2.55% | 260,310 | Shares | 2026-08-13 | |
| Mid Encompass Capital Advisors LLC Registered adviser | $11,136,513 | 2.18% | 222,197 | Shares | 2026-08-14 | |
| Mid Portolan Capital Management, LLC | $9,823,369 | 1.92% | 195,997 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $9,707,941 | 1.90% | 193,694 | Shares | 2026-08-13 | |
| Small Decker Retirement Planning Inc. Registered adviser | $8,130,381 | 1.59% | 100,524 | Shares | 2026-10-19 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $8,016,794 | 1.57% | 159,952 | Shares | 2026-08-14 | |
| Large VOLORIDGE INVESTMENT MANAGEMENT, LLC Registered adviser | $7,998,199 | 1.57% | 159,581 | Shares | 2026-08-14 | |
| Small Thomist Capital Management, LP | $6,712,170 | 1.31% | 133,922 | Shares | 2026-08-14 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $5,982,473 | 1.17% | 119,363 | Shares | 2026-08-13 | |
| Small FEARNLEY ASSET MANAGEMENT AS Exempt adviser | $5,605,220 | 1.10% | 111,836 | Shares | 2026-08-14 | |
| Large Walleye Capital LLC Registered adviser | $5,568,532 | 1.09% | 111,104 | Shares | 2026-08-03 | |
| Small Marnell Management LLC Registered adviser | $4,826,255 | 0.94% | 96,294 | Shares | 2026-08-13 | |
| Mid CastleKnight Management LP Registered adviser | $4,425,596 | 0.87% | 88,300 | Shares | 2026-08-14 | |
| Mega RAYMOND JAMES FINANCIAL INC | $4,423,490 | 0.87% | 88,258 | Shares | 2026-08-14 | |
| Large Point72 Asset Management, L.P. Registered adviser | $4,388,457 | 0.86% | 87,559 | Shares | 2026-08-14 | |
| Mid XTX Topco Ltd | $4,098,061 | 0.80% | 81,765 | Shares | 2026-08-14 | |
| Mid Militia Capital Management LLC Registered adviser | $4,009,600 | 0.78% | 80,000 | Shares | 2026-08-12 | |
| Mid Y-Intercept (Hong Kong) Ltd Exempt adviser | $3,808,073 | 0.75% | 47,083 | Shares | 2026-10-16 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $3,609,942 | 0.71% | 72,026 | Shares | 2026-08-14 | |
| Small GRAHAM CAPITAL WEALTH MANAGEMENT, LLC Registered adviser | $3,455,673 | 0.68% | 68,948 | Shares | 2026-08-07 | |
| Mid Ruffer LLP Registered adviser | $2,963,946 | 0.58% | 59,137 | Shares | 2026-07-30 | |
| Large CREDIT AGRICOLE S A | $2,856,840 | 0.56% | 57,000 | Shares | 2026-08-14 | |
| Large Quadrature Capital Ltd | $2,556,671 | 0.50% | 51,011 | Shares | 2026-08-07 | |
| Mega JANE STREET GROUP, LLC | $2,420,796 | 0.47% | 48,300 | Put | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $2,260,412 | 0.44% | 45,100 | Put | 2026-08-14 | |
| Mid Energy Income Partners, LLC Registered adviser | $2,238,309 | 0.44% | 44,659 | Shares | 2026-08-07 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $2,212,848 | 0.43% | 44,151 | Shares | 2026-09-02 | |
| Mega Invesco Ltd. Adviser | $2,205,831 | 0.43% | 44,011 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $2,087,146 | 0.41% | 41,643 | Shares | 2026-08-11 | |
| Large Balyasny Asset Management L.P. Registered adviser | $2,027,905 | 0.40% | 40,461 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $1,988,561 | 0.39% | 39,676 | Shares | 2026-08-13 | |
| Mega CITIGROUP INC Bank | $1,697,864 | 0.33% | 33,876 | Shares | 2026-08-03 | |
| Mega BlackRock, Inc. Holding company | $1,649,047 | 0.32% | 32,902 | Shares | 2026-08-07 | |
| Mid BTG Pactual Asset Management US LLC Registered adviser | $1,617,873 | 0.32% | 32,280 | Shares | 2026-08-14 | |
| Mid FOLKETRYGDFONDET | $1,617,572 | 0.32% | 32,274 | Shares | 2026-08-13 | |
| Small Triumph Capital Management Registered adviser | $1,596,732 | 0.31% | 19,742 | Shares | 2026-10-14 | |
| Small CVFG LLC Registered adviser | $1,587,049 | 0.31% | 31,665 | Shares | 2026-08-11 | |
| Large DAVENPORT & Co LLC Registered adviser | $1,581,123 | 0.31% | 19,549 | Shares | 2026-10-14 | |
| Small Precision Wealth Strategies, LLC Registered adviser | $1,569,407 | 0.31% | 31,313 | Shares | 2026-08-10 | |
| Mid Engineers Gate Manager LP | $1,541,791 | 0.30% | 30,762 | Shares | 2026-08-14 | |
| Mega Allianz Asset Management GmbH | $1,527,156 | 0.30% | 30,470 | Shares | 2026-09-02 | |
| Mid Skandinaviska Enskilda Banken AB (publ) Non-US | $1,487,010 | 0.29% | 29,669 | Shares | 2026-08-10 | |
| Mid Glenorchy Capital Ltd Registered adviser | $1,313,043 | 0.26% | 26,198 | Shares | 2026-07-29 | |
| Mega LPL Financial LLC Broker-dealer | $1,293,096 | 0.25% | 25,800 | Shares | 2026-08-07 | |
| Small Redhawk Wealth Advisors, Inc. Registered adviser | $1,261,647 | 0.25% | 15,599 | Shares | 2026-10-14 | |
| Large Jain Global LLC Registered adviser | $1,253,100 | 0.25% | 25,002 | Shares | 2026-08-14 | |
| Mid NAVELLIER & ASSOCIATES INC Registered adviser | $1,243,727 | 0.24% | 24,815 | Shares | 2026-08-04 | |
| Mid Inspire Advisors, LLC Registered adviser | $1,172,206 | 0.23% | 23,388 | Shares | 2026-08-13 | |
| Mid Uniplan Investment Counsel, Inc. Registered adviser | $1,119,931 | 0.22% | 22,345 | Shares | 2026-08-14 | |
| Small Persistent Asset Partners Ltd Exempt adviser | $1,112,011 | 0.22% | 22,187 | Shares | 2026-08-07 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1,087,604 | 0.21% | 21,700 | Call | 2026-08-14 | |
| Large Centiva Capital, LP Registered adviser | $1,080,737 | 0.21% | 21,563 | Shares | 2026-08-13 | |
| Large COMMONWEALTH EQUITY SERVICES, LLC Registered adviser | $1,010,018 | 0.20% | 20,152 | Shares | 2026-07-29 | |
| Small Veracity Capital LLC Registered adviser | $959,236 | 0.19% | 11,860 | Shares | 2026-10-08 | |
| Mid Kovack Advisors, Inc. Registered adviser | $934,537 | 0.18% | 18,646 | Shares | 2026-07-29 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $919,301 | 0.18% | 18,342 | Shares | 2026-08-14 | |
| Mega ENVESTNET ASSET MANAGEMENT INC Registered adviser | $900,305 | 0.18% | 17,963 | Shares | 2026-09-23 | |
| Small Manatuck Hill Partners, LLC Registered adviser | $887,124 | 0.17% | 17,700 | Shares | 2026-08-14 | |
| Large Penserra Capital Management LLC Registered adviser | $822,719 | 0.16% | 16,415 | Shares | 2026-08-13 | |
| Large HRT FINANCIAL LP | $813,998 | 0.16% | 16,241 | Shares | 2026-08-14 | |
| Mid SPROTT INC. Holding company | $791,896 | 0.16% | 15,800 | Shares | 2026-07-28 | |
| Mega NORTHERN TRUST CORP Bank | $615,223 | 0.12% | 12,275 | Shares | 2026-08-13 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $561,344 | 0.11% | 11,200 | Call | 2026-09-02 | |
| Mid Numerai GP LLC Registered adviser | $515,784 | 0.10% | 10,291 | Shares | 2026-08-14 | |
| Micro Regatta Research & Money Management | $509,367 | 0.10% | 10,163 | Shares | 2026-08-12 | |
| Mega Nuveen, LLC | $486,915 | 0.10% | 9,715 | Shares | 2026-08-11 | |
| Small FOX RUN MANAGEMENT, L.L.C. Registered adviser | $486,113 | 0.10% | 9,699 | Shares | 2026-08-04 | |
| Small State of Wyoming | $468,120 | 0.09% | 9,340 | Shares | 2026-08-06 | |
| Mid Aquatic Capital Management LLC Registered adviser | $440,203 | 0.09% | 8,783 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $431,032 | 0.08% | 8,600 | Put | 2026-09-02 | |
| Large Cetera Investment Advisers Registered adviser | $416,898 | 0.08% | 8,318 | Shares | 2026-08-12 | |
| Large Janney Montgomery Scott LLC Adviser | $403,014 | 0.08% | 8,041 | Shares | 2026-08-05 | |
| Small OneAscent Investment Solutions LLC | $401,010 | 0.08% | 8,001 | Shares | 2026-08-11 | |
| Large Cambridge Investment Research Advisors, Inc. | $341,617 | 0.07% | 6,816 | Shares | 2026-07-30 | |
| Mid Massar Capital Management, LP | $320,116 | 0.06% | 6,387 | Shares | 2026-08-14 | |
| Mid Magnetar Financial LLC Registered adviser | $293,051 | 0.06% | 5,847 | Shares | 2026-08-14 | |
| Micro MONTCHANIN ASSET MANAGEMENT, LLC Registered adviser | $269,395 | 0.05% | 5,375 | Shares | 2026-07-30 | |
| Large Marex Group plc | $255,712 | 0.05% | 5,102 | Shares | 2026-08-14 | |
| Large SIH Partners, LLLP | $251,251 | 0.05% | 5,013 | Shares | 2026-08-14 | |
| Large COMMERCE BANK Bank | $250,600 | 0.05% | 5,000 | Shares | 2026-08-12 | |
| Large MML INVESTORS SERVICES, LLC | $242,480 | 0.05% | 4,838 | Shares | 2026-08-07 | |
| Large Mariner, LLC Registered adviser | $235,964 | 0.05% | 4,708 | Shares | 2026-08-13 | |
| Large ExodusPoint Capital Management, LP Registered adviser | $221,480 | 0.04% | 4,419 | Shares | 2026-08-14 | |
| Large Jefferies Financial Group Inc. Holding company | $221,430 | 0.04% | 4,418 | Shares | 2026-08-17 | |
| Large Schonfeld Strategic Advisors LLC Registered adviser | $209,451 | 0.04% | 4,179 | Shares | 2026-08-14 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $172,963 | 0.03% | 3,451 | Shares | 2026-08-14 | |
| Large NewEdge Advisors, LLC Registered adviser | $149,357 | 0.03% | 2,980 | Shares | 2026-08-12 | |
| Large PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO Benefit plan | $139,083 | 0.03% | 2,775 | Shares | 2026-08-17 | |
| Mega ROYAL BANK OF CANADA Bank | $135,073 | 0.03% | 2,695 | Shares | 2026-08-14 |
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