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ECO · Okeanis Eco Tankers Corp. · Holdings

Track ECO — free
$90.16 -1.07 (-1.18%)
Market Cap
$3.56B
Shares
39.04M
Volume · Oct 21 604.39K Avg daily vol (3M) 694.22K

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 holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 124
Total Value: $510,801,386
Total Shares: 10,059,810
Showing 1–100 of 130 holdings by value · page 1 of 2

Institutional Ownership Trend

12 quarters

Holder Concentration

Across 118 13F filers
Top Holder
14.4%
Dec 2023 → Jun 2026 · range 14.4% – 47.3%
of institutional value
Top 5
39.7%
Dec 2023 → Jun 2026 · range 36.3% – 83.6%
of institutional value
Top 10
59.7%
Dec 2023 → Jun 2026 · range 54.1% – 94.9%
of institutional value
HHI
506
Dec 2023 → Jun 2026 · range 477 – 2,840
Broadly held

Who 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%

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, 2026

Measured 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.

Conviction holders
2
1.71% of filers hold it in their top 10
Mar 31, 2026: 4
Holders above 5%
0
median weight 0.005%
Mar 31, 2026: 2
Crowding
—
a foreign private issuer reports ordinary shares, a different unit from the listed shares
Private-fund advisers
—
of shares outstanding
Institutional ownership
—
a foreign private issuer reports ordinary shares, a different unit from the listed shares
Top 10 holders
60.1%
of 13F shares, Herfindahl 0.051
Active holders
+2.9%
like-for-like share change of active filers
5% stakes on record
2
0 13D, 2 13G (0 institutional, 0 passive, 2 exempt)
How long holders have held it value-weighted 6.0 quarters
Under 1 year 46.7% 1 to 3 years 53.3% 3 years or more 0.000% Since coverage start 0.000%

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 basis

Estimated, 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 avg cost
$39.83
estimated per share
Mar 31, 2026: $36.50
Quarter-end price
$50.12
implied by 13F values
Estimated gain or loss
+25.8%
price against the estimated cost
Estimated at a loss
5.91%
of costed 13F value

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, 2026
# Company Shared holders
1 CMBT Cmb.Tech NV 7
2 HSHP Himalaya Shipping Ltd. 4
3 HAFN Hafnia Ltd 6
4 FRO Frontline plc 7
5 SBLK Star Bulk Carriers Corp. 6
6 TRMD TORM plc 4
7 INSW International Seaways, Inc. 5
8 DHT DHT Holdings, Inc. 5
9 TNK Teekay Tankers Ltd. 4
10 TGB Trekor Metals Ltd 4

Shareholder Targets

13F filers that own its peers but not ECO, quarter ended Jun 30, 2026

Found 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
1 FMR LLC Holding company, Diversified active $1,965,284,802 19 held
2 STATE STREET CORP Bank, Index-like $1,517,820,560 16 held
3 VANGUARD CAPITAL MANAGEMENT LLC Registered adviser, Index-like $1,104,333,168 14 held
4 VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active $1,060,827,361 15 held
5 AMERICAN CENTURY COMPANIES INC Unknown, Diversified active $903,150,125 14 held
6 GEODE CAPITAL MANAGEMENT, LLC Registered adviser, Index-like $824,379,739 16 held
7 Dodge & Cox Registered adviser, Diversified active $745,913,964 1 held
8 OAKTREE CAPITAL MANAGEMENT LP Adviser, Concentrated $529,796,516 1 held
9 RENAISSANCE TECHNOLOGIES LLC Registered adviser, Diversified active $518,697,642 14 held
10 CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser, Diversified active $333,137,811 15 held

Fund Ownership of ECO by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index 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.

Showing 100 of 130
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Holder Value (USD) % of 13F Shares Open

Showing the top 100 of 130 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 1964954 CUSIP Y64177101 13F (30d) 12 filings 12 filers Visit website Investor relations