KROS Institutional Ownership & Shareholders
KEROS THERAPEUTICS INC (KROS) is currently held by 135 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $203.54M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of KROS tracked by InsiderSet, reporting ownership valued at approximately $29.90M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $26.15M, representing an estimated loss of -12.52% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 53% of the total disclosed KROS value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Nantahala Capital Management, Llc, Aqr Capital Management Llc, and several other long-term asset managers with concentrated positions in KEROS THERAPEUTICS INC (KROS).
This page ranks the largest institutional KROS shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
135
Total Reported Value
$203.54M
Largest Holder
Blackrock, Inc.
Largest Position
$29.90M
Insider Transactions (90d)
5
Latest Filing Quarter
Q2 2026
New Institutional Positions
72
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 2,794,217 | $29,898,120 | $26,153,871 | -$3,744,249 | -12.52% | |
| Nantahala Capital Management, Llc | 0.91% | 1,410,419 | $15,091,483 | $13,201,522 | -$1,889,961 | -12.52% | |
| Aqr Capital Management Llc | 0.00% | 967,859 | $10,356,092 | $9,059,160 | -$1,296,932 | -12.52% | |
| Vanguard Capital Management Llc | 0.00% | 833,596 | $8,919,477 | $7,802,459 | -$1,117,018 | -12.52% | |
| Mackenzie Financial Corp | 0.01% | 742,837 | $8,468,342 | $6,952,954 | -$1,515,388 | -17.89% | |
| Orbimed Advisors Llc | 0.15% | 759,155 | $8,122,959 | $7,105,691 | -$1,017,268 | -12.52% | |
| Federated Hermes, Inc. | 0.01% | 700,427 | $7,494,569 | $6,555,997 | -$938,572 | -12.52% | |
| Vanguard Portfolio Management Llc | 0.00% | 652,635 | $6,983,195 | $6,108,664 | -$874,531 | -12.52% | |
| Madison Avenue Partners, Lp | 0.29% | 626,583 | $6,704,438 | $5,864,817 | -$839,621 | -12.52% | |
| Qube Research & Technologies Ltd | 0.01% | 608,837 | $6,514,556 | $5,698,714 | -$815,842 | -12.52% | |
| Jacobs Levy Equity Management, Inc | 0.02% | 605,445 | $6,478,262 | $5,666,965 | -$811,297 | -12.52% | |
| State Street Corp | 0.00% | 541,193 | $5,790,765 | $5,065,566 | -$725,199 | -12.52% | |
| Geode Capital Management, Llc | 0.00% | 496,165 | $5,657,973 | $4,644,104 | -$1,013,869 | -17.92% | |
| Dimensional Fund Advisors Lp | 0.00% | 403,603 | $4,600,617 | $3,777,724 | -$822,893 | -17.89% | |
| Fmr Llc | 0.00% | 441,540 | $4,499,293 | $4,132,814 | -$366,479 | -8.15% | |
| Citadel Advisors Llc | 0.00% | 396,098 | $4,238,249 | $3,707,477 | -$530,772 | -12.52% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 359,086 | $3,842,220 | $3,361,045 | -$481,175 | -12.52% |
| D. E. Shaw & Co., Inc. | 0.00% | 267,460 | $2,861,822 | $2,503,426 | -$358,396 | -12.52% | |
| Bridgeway Capital Management, Llc | 0.05% | 265,017 | $2,835,682 | $2,480,559 | -$355,123 | -12.52% | |
| Nuveen, Llc | 0.00% | 247,756 | $2,650,989 | $2,318,996 | -$331,993 | -12.52% | |
| Adar1 Capital Management, Llc | 0.12% | 246,818 | $2,640,953 | $2,310,216 | -$330,737 | -12.52% | |
| Two Sigma Investments, Lp | 0.00% | 246,649 | $2,639,144 | $2,308,635 | -$330,509 | -12.52% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 233,175 | $2,494,973 | $2,182,518 | -$312,455 | -12.52% | |
| Millennium Management Llc | 0.00% | 184,822 | $1,977,595 | $1,729,934 | -$247,661 | -12.52% | |
| Goldman Sachs Group Inc | 0.00% | 177,846 | $1,902,953 | $1,664,639 | -$238,314 | -12.52% | |
| Charles Schwab Investment Management Inc | 0.00% | 158,712 | $1,698,218 | $1,485,544 | -$212,674 | -12.52% | |
| Man Group Plc | 0.00% | 155,541 | $1,664,289 | $1,455,864 | -$208,425 | -12.52% | |
| Wells Fargo & Company/Mn | 0.00% | 155,480 | $1,663,636 | $1,455,293 | -$208,343 | -12.52% | |
| Northern Trust Corp | 0.00% | 153,843 | $1,646,121 | $1,439,970 | -$206,151 | -12.52% | |
| Bessemer Group Inc | 0.00% | 143,853 | $1,539,000 | $1,346,464 | -$192,536 | -12.51% | |
| Empowered Funds, Llc | 0.01% | 142,151 | $1,521,016 | $1,330,533 | -$190,483 | -12.52% | |
| Ubs Group Ag | 0.00% | 137,987 | $1,476,461 | $1,291,558 | -$184,903 | -12.52% | |
| Vanguard Fiduciary Trust Co | 0.00% | 131,314 | $1,405,060 | $1,229,099 | -$175,961 | -12.52% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 127,885 | $1,368,370 | $1,197,004 | -$171,366 | -12.52% | |
| O'Shaughnessy Asset Management, Llc | 0.01% | 126,379 | $1,352,255 | $1,182,907 | -$169,348 | -12.52% | |
| Jane Street Group, Llc | 0.00% | 115,267 | $1,233,357 | $1,078,899 | -$154,458 | -12.52% | |
| Acadian Asset Management Llc | 0.00% | 115,618 | $1,233,000 | $1,082,184 | -$150,816 | -12.23% | |
| Ameriprise Financial Inc | 0.00% | 101,342 | $1,084,360 | $948,561 | -$135,799 | -12.52% | |
| Bank Of New York Mellon Corp | 0.00% | 88,289 | $1,006,494 | $826,385 | -$180,109 | -17.89% | |
| American Century Companies Inc | 0.00% | 84,680 | $906,076 | $792,605 | -$113,471 | -12.52% | |
| Los Angeles Capital Management Llc | 0.00% | 84,372 | $902,781 | $789,722 | -$113,059 | -12.52% | |
| Morgan Stanley | 0.00% | 79,286 | $848,366 | $742,117 | -$106,249 | -12.52% | |
| Invesco Ltd. | 0.00% | 71,563 | $765,724 | $669,830 | -$95,894 | -12.52% | |
| Hsbc Holdings Plc | 0.00% | 69,926 | $761,494 | $654,507 | -$106,987 | -14.05% | |
| Martingale Asset Management L P | 0.02% | 67,796 | $725,418 | $634,571 | -$90,847 | -12.52% | |
| Rbf Capital, Llc | 0.03% | 62,800 | $671,960 | $587,808 | -$84,152 | -12.52% | |
| Xtx Topco Ltd | 0.01% | 59,531 | $636,982 | $557,210 | -$79,772 | -12.52% | |
| Jain Global Llc | 0.01% | 59,209 | $633,536 | $554,196 | -$79,340 | -12.52% | |
| Barclays Plc | 0.00% | 55,405 | $631,616 | $518,591 | -$113,025 | -17.89% | |
| Russell Investments Group, Ltd. | 0.00% | 53,435 | $609,171 | $500,152 | -$109,019 | -17.90% |
Frequently asked questions about KROS
Who are the largest institutional holders of KROS?
The largest institutional holders of KROS reported in the latest SEC Form 13F filings include Blackrock, Inc., Nantahala Capital Management, Llc, Aqr Capital Management Llc, Vanguard Capital Management Llc, and Mackenzie Financial Corp. InsiderSet ranks institutional holders by their latest reported KROS position.
What is KROS institutional ownership?
This page tracks KROS positions reported by institutional investment managers through SEC Form 13F. KEROS THERAPEUTICS INC (KROS) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own KROS?
InsiderSet currently tracks 135 institutional managers reporting KROS holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of KROS shareholders.
How much KROS stock do institutions own?
Institutional investment managers disclosed approximately $203.54M in KROS holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was KROS institutional ownership last updated?
The latest KROS institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional KROS holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its KROS position after the reporting date.
Are institutions buying or selling KROS?
Institutional buying and selling can be analyzed by comparing KROS positions across consecutive 13F reporting periods. InsiderSet's KROS Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View KROS ownership changes.
How has KROS institutional ownership changed over time?
InsiderSet tracks KROS institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.