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Equibles

KROS

Keros Therapeutics, Inc.

Company with tickers: KROS

CIK
1664710
CUSIP
492327101
Shares Outstanding
19,791,837
13F Activity (30d)
13 filings 9 filers

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.

Holders: 149
Total Value: $201,004,528
Total Shares: 18,206,940
Showing 1–100 of 155 holdings by value · page 1 of 2

Institutional Ownership Trend

34 quarters

Holder Concentration

Across 149 13F filers · Δ vs Dec 31, 2025
Top Holder
13.2%
Jun 2025 → Mar 2026 · range 11.0% – 14.9%
+2.2 pts
Top 5
33.4%
Jun 2025 → Mar 2026 · range 33.4% – 43.5%
−0.5 pts
Top 10
51.5%
Jun 2025 → Mar 2026 · range 51.5% – 62.4%
−0.8 pts
HHI
419
Jun 2025 → Mar 2026 · range 395 – 545
Broadly held+23

Quarterly Activity

vs Dec 31, 2025
New
26
Increased
47
Decreased
55
Sold Out
42
Unchanged
21
Holder count: -16
Institutional value: -54.3%
Shares held: -15.8%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mid Nantahala Capital Management, LLC +750,000 1,360,419
Mega DIMENSIONAL FUND ADVISORS LP +263,347 321,360
Mega AQR CAPITAL MANAGEMENT LLC +226,020 406,563
Mega Nuveen, LLC +198,978 262,075
Large LOS ANGELES CAPITAL MANAGEMENT LLC +138,425 172,196

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mid Madison Avenue Partners, LP −1,020,831 626,583
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP −744,267 590,249
Mega STATE STREET CORP −514,263 561,730
Mega GOLDMAN SACHS GROUP INC −366,038 224,479
Mega D. E. Shaw & Co., Inc. −245,865 509,608

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 831,421 $9,178,887
Large Empowered Funds, LLC 145,517 $1,606,507
Mega VANGUARD FIDUCIARY TRUST CO 127,302 $1,405,414
Large ACADIAN ASSET MANAGEMENT LLC 65,436 $722,413
Mega PRINCIPAL FINANCIAL GROUP INC 59,594 $657,917

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 1,525,355 $31,056,226
Mid Weiss Asset Management LP 254,063 $5,172,722
Mid ALGERT GLOBAL LLC 193,607 $3,941,838
Large TWO SIGMA ADVISERS, LP 171,800 $3,497,848
Large NOMURA HOLDINGS INC 156,753 $3,191,491
Filter: New 26 Increased 47 Reduced 55 Sold out 42 Unchanged 21
Showing 100 of 155
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $26,626,189 13.25% 2,411,793
Mid Nantahala Capital Management, LLC $15,019,025 7.47% 1,360,419
Mega VANGUARD CAPITAL MANAGEMENT LLC $9,178,887 4.57% 831,421
Mid ORBIMED ADVISORS LLC $8,381,071 4.17% 759,155
Large Qube Research & Technologies Ltd $8,003,183 3.98% 724,926
Large JACOBS LEVY EQUITY MANAGEMENT, INC $7,795,023 3.88% 706,071
Large FEDERATED HERMES, INC. $7,609,087 3.79% 689,229
Mega GEODE CAPITAL MANAGEMENT, LLC $7,523,317 3.74% 681,460
Mid Madison Avenue Partners, LP $6,917,476 3.44% 626,583
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $6,516,348 3.24% 590,249
Mega STATE STREET CORP $6,201,499 3.09% 561,730
Mega D. E. Shaw & Co., Inc. $5,626,072 2.80% 509,608
Large RENAISSANCE TECHNOLOGIES LLC $5,006,441 2.49% 453,482
Mega CITADEL ADVISORS LLC $4,489,592 2.23% 406,666
Mega AQR CAPITAL MANAGEMENT LLC $4,488,452 2.23% 406,563
Mega TWO SIGMA INVESTMENTS, LP $4,016,738 2.00% 363,835
Mega DIMENSIONAL FUND ADVISORS LP $3,547,813 1.77% 321,360
Mega Nuveen, LLC $2,893,307 1.44% 262,075
Large Connor, Clark & Lunn Investment Management Ltd. $2,847,039 1.42% 257,884
Mega NORTHERN TRUST CORP Bank $2,806,222 1.40% 254,187
Large Man Group plc $2,634,342 1.31% 238,618
Mega GOLDMAN SACHS GROUP INC $2,478,247 1.23% 224,479
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $2,152,987 1.07% 195,017
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $1,986,670 0.99% 179,952
Large LOS ANGELES CAPITAL MANAGEMENT LLC $1,901,043 0.95% 172,196
Mid Y-Intercept (Hong Kong) Ltd $1,815,892 0.90% 164,483
Large MACKENZIE FINANCIAL CORP $1,683,048 0.84% 152,450
Mega WELLS FARGO & COMPANY/MN $1,667,481 0.83% 151,040
Mega UBS Group AG $1,607,125 0.80% 145,573
Large Empowered Funds, LLC $1,606,507 0.80% 145,517
Large BESSEMER GROUP INC $1,588,137 0.79% 143,853
Mega CITADEL ADVISORS LLC $1,434,096 0.71% 129,900
Mega VANGUARD FIDUCIARY TRUST CO Bank $1,405,414 0.70% 127,302
Mega MORGAN STANLEY $1,370,193 0.68% 124,112
Mega Bank of New York Mellon Corp Bank $1,335,219 0.66% 120,944
Large Point72 Asset Management, L.P. $1,203,525 0.60% 109,015
Mega MILLENNIUM MANAGEMENT LLC $1,179,712 0.59% 106,858
Mega AMERIPRISE FINANCIAL INC $1,131,368 0.56% 102,479
Mid ADAR1 Capital Management, LLC $1,074,390 0.53% 97,318
Mid XTX Topco Ltd $975,074 0.49% 88,322
Mega Invesco Ltd. $969,002 0.48% 87,772
Large Russell Investments Group, Ltd. $897,669 0.45% 81,311
Large HRT FINANCIAL LP $850,102 0.42% 77,002
Large ACADIAN ASSET MANAGEMENT LLC $722,413 0.36% 65,436
Mega AMERICAN CENTURY COMPANIES INC $709,430 0.35% 64,260
Mid RBF Capital, LLC $693,312 0.34% 62,800
Mega PRINCIPAL FINANCIAL GROUP INC $657,917 0.33% 59,594
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $655,776 0.33% 59,400
Small Rangeley Capital, LLC $600,576 0.30% 54,400
Mega HSBC HOLDINGS PLC $596,005 0.30% 53,986
Mega BANK OF AMERICA CORP /DE/ Bank $592,340 0.29% 53,654
Mega DEUTSCHE BANK AG\ Bank $560,445 0.28% 50,765
Large STRS OHIO $558,624 0.28% 50,600
Mid Jump Financial, LLC $556,338 0.28% 50,393
Large PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO Pension $555,576 0.28% 50,324
Mega MASSACHUSETTS FINANCIAL SERVICES CO /MA/ $540,937 0.27% 48,998
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $534,336 0.27% 48,400
Mid MARTINGALE ASSET MANAGEMENT L P $525,459 0.26% 47,596
Mid PRELUDE CAPITAL MANAGEMENT, LLC $508,270 0.25% 46,039
Mega PRICE T ROWE ASSOCIATES INC /MD/ $506,471 0.25% 45,876
Mega JANE STREET GROUP, LLC $490,805 0.24% 44,457
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $486,864 0.24% 44,100
Mega RHUMBLINE ADVISERS $443,543 0.22% 40,176
Small GLOBEFLEX CAPITAL L P $418,117 0.21% 37,873
Mega JPMORGAN CHASE & CO $415,985 0.21% 37,680
Mid WINTON GROUP Ltd $402,220 0.20% 36,433
Large PANAGORA ASSET MANAGEMENT INC $382,602 0.19% 34,656
Large AVIVA PLC $378,749 0.19% 34,307
Mid PDT Partners, LLC $361,493 0.18% 32,744
Mega FMR LLC $360,720 0.18% 32,674
Mega ALLIANCEBERNSTEIN L.P. $340,694 0.17% 30,860
Mid Magnetar Financial LLC $332,138 0.17% 30,085
Large TUDOR INVESTMENT CORP ET AL $309,197 0.15% 28,007
Mega JANE STREET GROUP, LLC $298,080 0.15% 27,000
Large Quantinno Capital Management LP $262,299 0.13% 23,759
Mega BARCLAYS PLC $255,652 0.13% 23,157
Small FOX RUN MANAGEMENT, L.L.C. $251,601 0.13% 22,790
Mid SIMPLEX TRADING, LLC $246,059 0.12% 22,288
Mega FRANKLIN RESOURCES INC $240,185 0.12% 21,756
Large LSV ASSET MANAGEMENT $230,736 0.11% 20,900
Large Creative Planning $196,589 0.10% 17,807
Mega CITADEL ADVISORS LLC $189,888 0.09% 17,200
Large MetLife Investment Management, LLC $184,169 0.09% 16,682
Mid Engineers Gate Manager LP $183,208 0.09% 16,595
Large STATE OF WISCONSIN INVESTMENT BOARD $175,889 0.09% 15,932
Mega Vanguard Global Advisers, LLC $173,935 0.09% 15,755
Small EJF Capital LP $165,600 0.08% 15,000
Mid Brevan Howard Capital Management LP $161,747 0.08% 14,651
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $153,356 0.08% 13,891
Large Mariner, LLC $152,639 0.08% 13,826
Small Virtus Investment Advisers, LLC $139,943 0.07% 12,676
Mega JANE STREET GROUP, LLC $131,376 0.07% 11,900
Large MERCER GLOBAL ADVISORS INC /ADV $129,631 0.06% 11,742
Large LAZARD ASSET MANAGEMENT LLC $129,223 0.06% 11,705
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $124,111 0.06% 11,242
Small OXFORD ASSET MANAGEMENT LLP $123,129 0.06% 11,153
Small AMERICAN FINANCIAL GROUP INC $111,559 0.06% 10,105
Large SG Americas Securities, LLC Broker-Dealer $100,850 0.05% 9,135
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $100,640 0.05% 9,116
Large CWM, LLC $95,142 0.05% 8,618

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