Vault-13

STAR BULK CARRIERS CORP. SBLK

SHS PAR · Common Stock · CUSIP Y8162K204 · ISIN MHY8162K2046

244 institutional holders +39 vs Q1 2024
56,226,06856.2m shares reported held*
$1.4bnreported value*
73 new 97 added 45 reduced 33 sold out net bought ≈ $340.3m (+13.9m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($927.9k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $24.39. Options: 9 managers hold calls ($29.8m notional), 8 hold puts ($17.1m).

Trends to Q2 2024

Institutional holders

Managers reporting a position, each quarter

0100200300Q3 22: 164Q4 22: 160Q1 23: 173Q2 23: 160Q3 23: 152Q4 23: 178Q1 24: 205Q2 24: 244244Q3 22Q1 23Q3 23Q1 24Q2 24
Numbers
QuarterHolders
Q3 2022164
Q4 2022160
Q1 2023173
Q2 2023160
Q3 2023152
Q4 2023178
Q1 2024205
Q2 2024244

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
2000200Q4 22: 77 bought or addedQ4 22: 82 cut or sold outQ4 22Q1 23: 94 bought or addedQ1 23: 74 cut or sold outQ2 23: 68 bought or addedQ2 23: 89 cut or sold outQ2 23Q3 23: 72 bought or addedQ3 23: 74 cut or sold outQ4 23: 91 bought or addedQ4 23: 63 cut or sold outQ4 23Q1 24: 117 bought or addedQ1 24: 78 cut or sold outQ2 24: 170 bought or addedQ2 24: 78 cut or sold outQ2 24
Numbers
QuarterBought or addedCut or sold out
Q4 20227782
Q1 20239474
Q2 20236889
Q3 20237274
Q4 20239163
Q1 202411778
Q2 202417078

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$20m$40m$60mQ3 23 calls: $34.5mQ3 23 puts: $56.4mQ3 23P/C 1.63Q4 23 calls: $25.4mQ4 23 puts: $43.1mQ4 23P/C 1.70Q1 24 calls: $23.0mQ1 24 puts: $54.9mQ1 24P/C 2.38Q2 24 calls: $29.8mQ2 24 puts: $17.1mQ2 24P/C 0.57
Numbers
QuarterCallsPutsP/C
Q3 2023$34.5m$56.4m1.63
Q4 2023$25.4m$43.1m1.70
Q1 2024$23.0m$54.9m2.38
Q2 2024$29.8m$17.1m0.57

Biggest buyers

TWO SIGMA ADVISERS, LP Added +1,897,959+1.9m
OAKTREE CAPITAL MANAGEMENT LP Added +1,858,443+1.9m
LAZARD ASSET MANAGEMENT LLC New +1,529,686+1.5m
TWO SIGMA INVESTMENTS, LP Added +1,510,210+1.5m
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Added +1,379,929+1.4m
VOLORIDGE INVESTMENT MANAGEMENT, LLC New +1,052,515+1.1m
GOLDMAN SACHS GROUP INC Added +960,177+960.2k
Bank of New York Mellon Corp New +952,085+952.1k
MARSHALL WACE, LLP Added +903,542+903.5k
MILLENNIUM MANAGEMENT LLC Added +850,845+850.8k

Biggest sellers

ALLIANCEBERNSTEIN L.P. Reduced -5,232,146-5.2m
Ion Asset Management Ltd. Reduced -1,147,018-1.1m
MORGAN STANLEY Reduced -926,641-926.6k
Mirae Asset Global Investments Co., Ltd. Sold out -327,368-327.4k
TUDOR INVESTMENT CORP ET AL Reduced -277,035-277.0k
Scion Asset Management, LLC Sold out -250,000-250.0k
Grand Alliance Asset Management Ltd Reduced -160,000-160.0k
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced -154,751-154.8k
FIFTH LANE CAPITAL, LP Sold out -77,752-77.8k
PREVAIL INNOVATIVE WEALTH ADVISORS, LLC Sold out -77,459-77.5k

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $13.6m557.9k shares
SIMPLEX TRADING, LLC Added $4.3m177.3k shares
GROUP ONE TRADING LLC Added $2.7m112.4k shares
CITADEL ADVISORS LLC Added $2.7m108.9k shares
Walleye Trading LLC Added $2.2m88.9k shares
PEAK6 Investments LLC Added $1.8m75.7k shares
JANE STREET GROUP, LLC Reduced $1.8m72.4k shares
WOLVERINE TRADING, LLC Added $729.0k29.9k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $10.9m445.1k shares
CITADEL ADVISORS LLC Reduced $3.9m158.8k shares
SIMPLEX TRADING, LLC Reduced $953.0k39.1k shares
GROUP ONE TRADING LLC Reduced $672.9k27.6k shares
JANE STREET GROUP, LLC Reduced $480.3k19.7k shares
WOLVERINE TRADING, LLC Reduced $231.6k9.5k shares
Walleye Trading LLC Reduced $4.9k200 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Famatown Finance Ltd 13D · may seek influence +0.4 pts · filed 2025-10-06
Stated purposeOn October 3, 2025, Mr. Mikkel Storm Weum, an investment director of Seatankers Management AS ("Seatankers"), an entity that is related to the Reporting Persons, was appointed as a director of the Issuer (the "Director"). A copy of the Issuer's press release is attached as Exhibit B. The Common Shares that the Reporting Persons may be deemed to beneficially own are held for investment or other purposes, but as the Director is both a director of the Issuer and an investment director of Seatankers, the Reporting Persons may be deemed to have control over the management and policies of the Issuer. In the future, the Reporting Persons may be involved in and may plan for his involvement in any or all of the following: (a) The acquisition of additional Common Shares of the Issuer, or the disp… Full filing
11.8% +0.4 pts 13.6m≈ $338.9m 2025-10-06
Danaos Corp 13G · passive investor new · filed 2025-05-09 5.2% new 6.1m≈ $153.1m 2025-05-09

Insider purchases and sales in Q2 2024

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

None reported in Q2 2024.

Holders, Q2 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 OAKTREE CAPITAL MANAGEMENT LP 3.35% of their portfolio LOS ANGELES, CA 7,966,4268.0m $194.2m $194.2m 3.35% Added +1.9m +1,858,443
2 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.09% of their portfolio BOSTON, MA 4,193,6424.2m $102.2m $102.2m 0.09% Added +1.4m +1,379,929
3 BlackRock Inc. 0.00% of their portfolio New York, NY 4,111,6704.1m $100.2m $100.2m 0.00% Added +597.4k +597,418
4 MORGAN STANLEY 0.01% of their portfolio NEW YORK, NY 3,009,4523.0m $73.4m $73.4m 0.01% Reduced -926.6k -926,641
5 TWO SIGMA ADVISERS, LP 0.13% of their portfolio NEW YORK, NY 2,425,4592.4m $59.1m $59.1m 0.13% Added +1.9m +1,897,959
6 TWO SIGMA INVESTMENTS, LP 0.13% of their portfolio NEW YORK, NY 2,187,0552.2m $53.3m $53.3m 0.13% Added +1.5m +1,510,210
7 Encompass Capital Advisors LLC 2.71% of their portfolio New York, NY 2,052,2622.1m $50.0m $50.0m 2.71% Added +442.9k +442,860
8 MARSHALL WACE, LLP 0.06% of their portfolio LONDON, X0 1,791,4261.8m $43.7m $43.7m 0.06% Added +903.5k +903,542
9 RENAISSANCE TECHNOLOGIES LLC 0.07% of their portfolio NEW YORK, NY 1,746,0701.7m $42.6m $42.6m 0.07% Added +358.9k +358,870
10 LAZARD ASSET MANAGEMENT LLC 0.05% of their portfolio NEW YORK, NY 1,529,6861.5m $37.3m $37.3m 0.05% New
11 MILLENNIUM MANAGEMENT LLC 0.02% of their portfolio NEW YORK, NY 1,221,2551.2m $29.8m $29.8m 0.02% Added +850.8k +850,845
12 GOLDMAN SACHS GROUP INC 0.01% of their portfolio NEW YORK, NY 1,171,5981.2m $28.6m $28.6m 0.01% Added +960.2k +960,177
13 VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.10% of their portfolio JUPITER, FL 1,052,5151.1m $25.7m $25.7m 0.10% New
14 Artemis Investment Management LLP 0.34% of their portfolio EDINBURGH, X0 1,025,8021.0m $25.0m $25.0m 0.34% Added +233.0k +233,000
15 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 952,085952.1k $23.2m $23.2m 0.00% New
16 Walleye Capital LLC 0.21% of their portfolio NEW YORK, NY 829,633829.6k $20.2m $20.2m 0.21% Added +821.3k +821,262
17 Amundi 0.01% of their portfolio Paris, I0 774,067774.1k $19.4m $19.4m 0.01% Added +57.8k +57,817
18 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 731,718731.7k $17.8m $17.8m 0.00% Added +691.6k +691,578
19 Gratus Capital, LLC 0.71% of their portfolio ATLANTA, GA 719,747719.7k $17.5m $17.5m 0.71% Added +21.9k +21,880
20 Qube Research & Technologies Ltd 0.03% of their portfolio LONDON, X0 593,398593.4k $14.5m $14.5m 0.03% Added +591.0k +591,004
21 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 559,935559.9k $13.7m $13.7m 0.00% Reduced -55.1k -55,094
22 Grand Alliance Asset Management Ltd 6.29% of their portfolio HONG KONG, K3 540,000540.0k $13.2m $13.2m 6.29% Reduced -160.0k -160,000
23 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 502,781502.8k $12.3m $12.3m 0.00% Added +259.2k +259,207
24 AMERICAN CENTURY COMPANIES INC 0.01% of their portfolio KANSAS CITY, MO 480,676480.7k $11.7m $11.7m 0.01% New
25 WEXFORD CAPITAL LP 2.83% of their portfolio WEST PALM BEACH, FL 458,462458.5k $11.2m $11.2m 2.83% Added +172.1k +172,131
26 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 402,387402.4k $9.8m $9.8m 0.00% New
27 Gilman Hill Asset Management, LLC 1.76% of their portfolio NEW CANAAN, CT 399,697399.7k $9.7m $9.7m 1.76% Reduced -4.4k -4,413
28 DNB Asset Management AS 0.05% of their portfolio Oslo, Q8 397,635397.6k $9.7m $9.7m 0.05% New
29 FIL Ltd 0.01% of their portfolio HAMILTON, D0 396,882396.9k $9.7m $9.7m 0.01% Added +344.3k +344,309
30 Cubist Systematic Strategies, LLC 0.16% of their portfolio STAMFORD, CT 380,083380.1k $9.3m $9.3m 0.16% Added +25.4k +25,373
31 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 368,511368.5k $9.0m $9.0m 0.00% Added +224.3k +224,348
32 Russell Investments Group, Ltd. 0.01% of their portfolio Seattle, WA 354,955355.0k $8.7m $8.7m 0.01% Added +155.2k +155,195
33 VALUEWORKS LLC 2.68% of their portfolio NEW YORK, NY 353,087353.1k $8.6m $8.6m 2.68% Added +4.6k +4,595
34 CITADEL ADVISORS LLC 0.01% of their portfolio MIAMI, FL 347,813347.8k $8.5m $8.5m 0.01% Added +62.8k +62,790
35 Ramirez Asset Management, Inc. 1.66% of their portfolio NEW YORK, NY 333,651333.7k $8.1m $8.1m 1.66% Reduced -17.2k -17,167
36 CAPITAL FUND MANAGEMENT S.A. 0.09% of their portfolio PARIS, I0 324,189324.2k $7.9m $7.9m 0.09% Added +39.7k +39,671
37 Boston Partners 0.01% of their portfolio BOSTON, MA 312,772312.8k $7.6m $7.6m 0.01% Added +220.8k +220,753
38 Vienna Powszechne Towarzystwo Emerytalne S.A. Vienna Insurance Group 2.82% of their portfolio WARSAW, R9 295,000295.0k $7.2m $7.2m 2.82% Added +75.0k +75,000
39 STIFEL FINANCIAL CORP 0.01% of their portfolio ST. LOUIS, MO 271,630271.6k $6.6m $6.6m 0.01% Added +108.5k +108,539
40 COMMONWEALTH EQUITY SERVICES, LLC 0.01% of their portfolio WALTHAM, MA 261,304261.3k $6.4m $6.4m 0.01% Added +20.4k +20,361
41 Hosking Partners LLP 0.23% of their portfolio LONDON, X0 258,664258.7k $6.3m $6.3m 0.23% Reduced -12.4k -12,353
42 ARMOR ADVISORS, L.L.C. 4.87% of their portfolio NEW YORK, NY 252,143252.1k $6.1m $6.1m 4.87% Unchanged
43 BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio PARIS, I0 251,116251.1k $6.1m $6.1m 0.01% Added +240.4k +240,355
44 Balyasny Asset Management L.P. 0.02% of their portfolio Chicago, IL 249,896249.9k $6.1m $6.1m 0.02% New
45 Jessup Wealth Management, Inc 2.54% of their portfolio DAYTON, OH 243,936243.9k $5.9m $5.9m 2.54% Added +11.5k +11,534
46 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 242,886242.9k $5.9m $5.9m 0.00% Reduced -71.7k -71,688
47 NORGES BANK 0.00% of their portfolio OSLO, Q8 236,138236.1k $5.8m $5.8m 0.00% Unchanged
48 683 Capital Management, LLC 0.60% of their portfolio NEW YORK, NY 235,000235.0k $5.7m $5.7m 0.60% Added +35.0k +35,000
49 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 225,575225.6k $5.5m $5.5m 0.01% New
50 GSA CAPITAL PARTNERS LLP 0.36% of their portfolio LONDON, X0 211,372211.4k $5.2m $5.2m 0.36% Added +127.6k +127,643
51 HRT FINANCIAL LP 0.03% of their portfolio NEW YORK, NY 204,028204.0k $5.0m $5.0m 0.03% New
52 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 197,187197.2k $4.8m $4.8m 0.00% Added +87.6k +87,649
53 Relyea Zuckerberg Hanson LLC 0.65% of their portfolio STAMFORD, CT 159,730159.7k $3.9m $3.9m 0.65% New
54 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 158,843158.8k $3.9m $3.9m 0.00% Added +13.8k +13,797
55 SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.09% of their portfolio BALA CYNWYD, PA 156,888156.9k $3.8m $3.8m 0.09% Added +29.0k +29,042
56 Graham Capital Management, L.P. 0.12% of their portfolio ROWAYTON, CT 147,103147.1k $3.6m $3.6m 0.12% New
57 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio BALA CYNWYD, PA 146,299146.3k $3.6m $3.6m 0.01% Reduced -154.8k -154,751
58 Engineers Gate Manager LP 0.08% of their portfolio NEW YORK, NY 144,038144.0k $3.5m $3.5m 0.08% Added +106.3k +106,282
59 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 138,873138.9k $3.4m $3.4m 0.00% Reduced -9.6k -9,634
60 ExodusPoint Capital Management, LP 0.03% of their portfolio NEW YORK, NY 124,976125.0k $3.0m $3.0m 0.03% Added +34.9k +34,945
61 FMR LLC 0.00% of their portfolio BOSTON, MA 122,644122.6k $3.0m $3.0m 0.00% Added +122.3k +122,338
62 ROYCE & ASSOCIATES LP 0.03% of their portfolio New York, NY 119,143119.1k $2.9m $2.9m 0.03% New
63 Janney Montgomery Scott LLC 0.01% of their portfolio PHILADELPHIA, PA 116,566116.6k $2.8m $2.8m 0.01% Reduced -7.8k -7,824
64 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.07% of their portfolio HOUSTON, TX 114,279114.3k $2.8m $2.8m 0.07% New
65 Aquatic Capital Management LLC 0.10% of their portfolio CHICAGO, IL 113,900113.9k $2.8m $2.8m 0.10% Added +42.3k +42,300
66 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 112,692112.7k $2.7m $2.7m 0.00% Reduced -5.2m -5,232,146
67 Allianz Asset Management GmbH 0.00% of their portfolio MUNICH, 2M 112,497112.5k $2.7m $2.7m 0.00% New
68 Tidal Investments LLC 0.04% of their portfolio Milwaukee, WI 108,851108.9k $2.7m $2.7m 0.04% Added +55.7k +55,712
69 Verition Fund Management LLC 0.02% of their portfolio GREENWICH, CT 106,463106.5k $2.6m $2.6m 0.02% Added +24.2k +24,153
70 Jump Financial, LLC 0.05% of their portfolio Chicago, IL 105,900105.9k $2.6m $2.6m 0.05% Added +53.0k +53,040
71 Manatuck Hill Partners, LLC 1.07% of their portfolio WESTPORT, CT 100,000100.0k $2.4m $2.4m 1.07% Unchanged
72 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 99,55499.6k $2.4m $2.4m 0.00% Added +25.9k +25,903
73 Susquehanna Portfolio Strategies, LLC 0.10% of their portfolio Bala Cynwyd, PA 94,88194.9k $2.3m $2.3m 0.10% Added +9.3k +9,304
74 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 91,12391.1k $2.2m $2.2m 0.00% Added +49.7k +49,694
75 FIRST TRUST ADVISORS LP 0.00% of their portfolio Wheaton, IL 89,53689.5k $2.2m $2.2m 0.00% Reduced -18.4k -18,368
76 CFM WEALTH PARTNERS LLC 0.40% of their portfolio AUSTIN, TX 89,39789.4k $2.2m $2.2m 0.40% Added +6.2k +6,226
77 RBF Capital, LLC 0.13% of their portfolio RENO, NV 88,90088.9k $2.2m $2.2m 0.13% Unchanged
78 Dakota Wealth Management 0.05% of their portfolio PALM BEACH GARDENS, FL 80,15480.2k $2.0m $2.0m 0.05% Added +49.2k +49,244
79 Pathstone Holdings, LLC 0.01% of their portfolio ENGLEWOOD, NJ 77,65577.7k $1.9m $1.9m 0.01% Reduced -2.4k -2,427
80 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 76,95877.0k $1.9m $1.9m 0.00% Added +1.9k +1,889
81 Dynamic Technology Lab Private Ltd 0.21% of their portfolio SINGAPORE, U0 76,82776.8k $1.9m $1.9m 0.21% New
82 Cambridge Investment Research Advisors, Inc. 0.01% of their portfolio FAIRFIELD, IA 74,34174.3k $1.8m $1.8m 0.01% Added +3.2k +3,197
83 UBS Group AG 0.00% of their portfolio ZURICH, V8 69,88669.9k $1.7m $1.7m 0.00% Added +39.2k +39,172
84 IQ EQ FUND MANAGEMENT (SINGAPORE) PRIVATE Ltd 0.90% of their portfolio SINGAPORE, U0 65,00065.0k $1.6m $1.6m 0.90% New
85 O'SHAUGHNESSY ASSET MANAGEMENT, LLC 0.01% of their portfolio Stamford, CT 59,03459.0k $1.4m $1.4m 0.01% Added +3.1k +3,099
86 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 57,42757.4k $1.4m $1.4m 0.00% Reduced -24.5k -24,536
87 RAYMOND JAMES & ASSOCIATES 0.00% of their portfolio ST PETERSBURG, FL 55,88155.9k $1.4m $1.4m 0.00% Added +16.0k +16,022
88 Kestra Advisory Services, LLC 0.01% of their portfolio AUSTIN, TX 52,71752.7k $1.3m $1.3m 0.01% Reduced -1.8k -1,825
89 PRELUDE CAPITAL MANAGEMENT, LLC 0.10% of their portfolio NEW YORK, NY 50,44850.4k $1.2m $1.2m 0.10% Added +21.3k +21,291
90 B. Riley Wealth Advisors, Inc. 0.03% of their portfolio MEMPHIS, TN 49,02249.0k $1.2m $1.2m 0.03% Added +13.9k +13,869
91 LOS ANGELES CAPITAL MANAGEMENT LLC 0.00% of their portfolio LOS ANGELES, CA 48,90848.9k $1.2m $1.2m 0.00% New
92 Campbell & CO Investment Adviser LLC 0.10% of their portfolio BALTIMORE, MD 47,82447.8k $1.2m $1.2m 0.10% New
93 PDT Partners, LLC 0.11% of their portfolio New York, NY 46,25446.3k $1.1m $1.1m 0.11% Reduced -163 -163
94 HARVEY CAPITAL MANAGEMENT INC 0.30% of their portfolio PALM BEACH, FL 46,07046.1k $1.1m $1.1m 0.30% Reduced -7.0k -6,971
95 HORIZON KINETICS ASSET MANAGEMENT LLC 0.02% of their portfolio NEW YORK, NY 44,41744.4k $1.1m $1.1m 0.02% Added +843 +843
96 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 43,44443.4k $1.1m $1.1m 0.00% New
97 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 42,53642.5k $1.0m $1.0m 0.00% Added +10.5k +10,533
98 Quantedge Capital Pte Ltd 0.37% of their portfolio Singapore, U0 41,70041.7k $1.0m $1.0m 0.37% New
99 Global Retirement Partners, LLC 0.03% of their portfolio San Rafael, CA 36,84236.8k $898.2k $898.2k 0.03% Added +34.5k +34,478
100 Headlands Technologies LLC 0.09% of their portfolio CHICAGO, IL 35,34435.3k $861.7k $861.7k 0.09% New