Company · Ownership research

Star Bulk Carriers Corp. SBLK

CIK 0001386716 · CUSIP Y8162K204

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP Y8162K204 (SBLK), not CUSIP Y8162K904 (SBLK), CUSIP Y8162K954 (SBLK), and does not merge CUSIPs.

This page lists the top 20 of 189 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

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	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$69.21M 3,012,963 shares	0.06%	+2.45M(+435.70%)Added	SEC filing ↗ May 15, 2026	▾
02	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$47.49M 2,067,637 shares	0.07%	+237.25K(+13.00%)Added	SEC filing ↗ May 14, 2026	▾
03	VICTORY CAPITAL MANAGEMENT INC CIK 1040188 · View history	$44.11M 1,920,289 shares	0.03%	+1.92MNew	SEC filing ↗ May 15, 2026	▾
04	Philosophy Capital Management LLC CIK 1869199 · View history	$43.06M 1,874,418 shares	5.02%	+224.42K(+13.60%)Added	SEC filing ↗ May 15, 2026	▾
05	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$39.92M 1,737,933 shares	0.01%	+1.10M(+173.50%)Added	SEC filing ↗ May 15, 2026	▾
06	Boston Partners CIK 1386060 · View history	$37.37M 1,626,444 shares	0.04%	+783.35K(+92.90%)Added	SEC filing ↗ May 11, 2026	▾
07	MORGAN STANLEY CIK 895421 · View history	$35.25M 1,534,705 shares	0.00%	+440.30K(+40.20%)Added	SEC filing ↗ May 15, 2026	▾
08	MARSHALL WACE, LLP CIK 1318757 · View history	$27.95M 1,216,937 shares	0.03%	+1.12M(+1,168.90%)Added	SEC filing ↗ May 15, 2026	▾
09	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$26.96M 1,173,877 shares	0.02%	+1.07M(+1,084.00%)Added	SEC filing ↗ May 15, 2026	▾
10	Focus Partners Wealth CIK 1542153 · View history	$26.18M 1,139,823 shares	0.03%	+98.57K(+9.50%)Added	SEC filing ↗ May 15, 2026	▾
11	Qube Research & Technologies Ltd CIK 1729829 · View history	$24.96M 1,086,842 shares	0.04%	+1.09MNew	SEC filing ↗ May 15, 2026	▾
12	FEARNLEY ASSET MANAGEMENT AS CIK 2056821 · View history	$21.85M 951,206 shares	7.14%	+373.89K(+64.80%)Added	SEC filing ↗ May 15, 2026	▾
13	COOPER CREEK PARTNERS MANAGEMENT LLC CIK 1512162 · View history	$19.89M 866,033 shares	0.96%	+866.03KNew	SEC filing ↗ May 15, 2026	▾
14	Allianz Asset Management GmbH CIK 1535323 · View history	$18.36M 799,441 shares	0.02%	+32.67K(+4.30%)Added	SEC filing ↗ May 11, 2026	▾
15	Point72 Asset Management, L.P. CIK 1603466 · View history	$18.14M 789,935 shares	0.03%	-17.22K(-2.10%)Reduced	SEC filing ↗ May 15, 2026	▾
16	HRT FINANCIAL LP CIK 1475597 · View history	$17.71M 771,227 shares	0.04%	+726.53K(+1,625.50%)Added	SEC filing ↗ May 14, 2026	▾
17	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$17.40M 757,426 shares	0.01%	+757.43KNew	SEC filing ↗ May 14, 2026	▾
18	DNB Asset Management AS CIK 1456670 · View history	$17.08M 743,785 shares	0.06%	-73.31K(-9.00%)Reduced	SEC filing ↗ May 14, 2026	▾
19	TUDOR INVESTMENT CORP ET AL CIK 923093 · View history	$16.88M 735,010 shares	0.09%	+735.01KNew	SEC filing ↗ May 15, 2026	▾
20	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$16.53M 719,501 shares	0.01%	-167.56K(-18.90%)Reduced	SEC filing ↗ May 15, 2026	▾

Showing 20 / 189 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

189

Cancelled or null records excluded

Disclosed shares

38,100,041

Not deduplicated across managers

Disclosed value

$874.44M

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.

Star Bulk Carriers Corp. · Q1 2026

Explore all 189 reporting institutions.

This page includes 20 of 189 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.

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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.