TARA Institutional Ownership & Shareholders
PROTARA THERAPEUTIC INC (TARA) is currently held by 117 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $181.96M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Janus Henderson Group Plc is currently the largest disclosed institutional shareholder of TARA tracked by InsiderSet, reporting ownership valued at approximately $27.15M in its March 31, 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 $12.91M, representing an estimated loss of -52.44% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 60% of the total disclosed TARA value among the investors covered in this analysis. Major shareholders include Janus Henderson Group Plc, Blackrock, Inc., Millennium Management Llc, and several other long-term asset managers with concentrated positions in PROTARA THERAPEUTIC INC (TARA).
This page ranks the largest institutional TARA 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
117
Total Reported Value
$181.96M
Largest Holder
Janus Henderson Group Plc
Largest Position
$27.15M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
142
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Janus Henderson Group Plc | 0.01% | 5,207,011 | $27,154,562 | $12,913,387 | -$14,241,175 | -52.44% | |
| Blackrock, Inc. | 0.00% | 3,663,499 | $13,994,565 | $9,085,478 | -$4,909,087 | -35.08% | |
| Millennium Management Llc | 0.01% | 3,101,166 | $11,846,454 | $7,690,892 | -$4,155,562 | -35.08% | |
| Velan Capital Investment Management Lp | 6.66% | 2,844,652 | $10,866,571 | $7,054,737 | -$3,811,834 | -35.08% | |
| Vanguard Capital Management Llc | 0.00% | 2,300,133 | $8,786,508 | $5,704,330 | -$3,082,178 | -35.08% | |
| Orbimed Advisors Llc | 0.16% | 2,220,000 | $8,480,400 | $5,505,600 | -$2,974,800 | -35.08% | |
| Catalio Capital Management, Lp | 1.36% | 1,446,254 | $7,708,534 | $3,586,710 | -$4,121,824 | -53.47% | |
| Sio Capital Management, Llc | 1.26% | 1,921,872 | $7,341,551 | $4,766,243 | -$2,575,308 | -35.08% | |
| Acorn Capital Advisors, Llc | 1.83% | 1,752,115 | $6,693,079 | $4,345,245 | -$2,347,834 | -35.08% | |
| Integral Health Asset Management, Llc | 0.24% | 1,500,000 | $5,730,000 | $3,720,000 | -$2,010,000 | -35.08% | |
| 5Am Venture Management, Llc | 1.82% | 1,369,782 | $5,232,567 | $3,397,059 | -$1,835,508 | -35.08% | |
| Geode Capital Management, Llc | 0.00% | 1,326,246 | $5,067,467 | $3,289,090 | -$1,778,377 | -35.09% | |
| Citadel Advisors Llc | 0.00% | 1,232,365 | $4,707,635 | $3,056,265 | -$1,651,370 | -35.08% | |
| State Street Corp | 0.00% | 1,068,295 | $4,080,887 | $2,649,372 | -$1,431,515 | -35.08% | |
| Qube Research & Technologies Ltd | 0.00% | 1,045,516 | $3,993,871 | $2,592,880 | -$1,400,991 | -35.08% | |
| Balyasny Asset Management L.P. | 0.01% | 1,026,691 | $3,921,960 | $2,546,194 | -$1,375,766 | -35.08% | |
| Baker Bros. Advisors Lp | 0.02% | 971,614 | $3,711,565 | $2,409,603 | -$1,301,962 | -35.08% | |
| Adar1 Capital Management, Llc | 0.17% | 940,512 | $3,592,756 | $2,332,470 | -$1,260,286 | -35.08% | |
| Bank Of America Corp | 0.00% | 882,179 | $3,369,924 | $2,187,804 | -$1,182,120 | -35.08% | |
| Marshall Wace, Llp | 0.00% | 701,021 | $2,677,900 | $1,738,532 | -$939,368 | -35.08% | |
| Dimensional Fund Advisors Lp | 0.00% | 683,230 | $2,611,855 | $1,694,410 | -$917,445 | -35.13% | |
| Northern Trust Corp | 0.00% | 552,306 | $2,109,809 | $1,369,719 | -$740,090 | -35.08% | |
| Point72 Asset Management, L.P. | 0.00% | 548,932 | $2,096,920 | $1,361,351 | -$735,569 | -35.08% | |
| Goldman Sachs Group Inc | 0.00% | 546,227 | $2,086,587 | $1,354,643 | -$731,944 | -35.08% | |
| Morgan Stanley | 0.00% | 508,434 | $1,942,218 | $1,260,916 | -$681,302 | -35.08% | |
| Walleye Capital Llc | 0.01% | 505,432 | $1,930,750 | $1,253,471 | -$677,279 | -35.08% | |
| Vanguard Portfolio Management Llc | 0.00% | 491,657 | $1,878,130 | $1,219,309 | -$658,821 | -35.08% | |
| Ubs Group Ag | 0.00% | 456,773 | $1,744,873 | $1,132,797 | -$612,076 | -35.08% | |
| Vanguard Fiduciary Trust Co | 0.00% | 334,683 | $1,278,489 | $830,014 | -$448,475 | -35.08% | |
| Verdad Advisers, Lp | 1.14% | 312,249 | $1,192,791 | $774,378 | -$418,413 | -35.08% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 295,565 | $1,129,058 | $733,001 | -$396,057 | -35.08% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 251,500 | $960,730 | $623,720 | -$337,010 | -35.08% |
| Aqr Capital Management Llc | 0.00% | 208,969 | $798,262 | $518,243 | -$280,019 | -35.08% | |
| Jump Financial, Llc | 0.01% | 203,100 | $775,842 | $503,688 | -$272,154 | -35.08% | |
| Oppenheimer & Co Inc | 0.01% | 217,631 | $663,775 | $539,725 | -$124,050 | -18.69% | |
| Cibc World Market Inc. | 0.00% | 166,495 | $636,011 | $412,908 | -$223,103 | -35.08% | |
| Charles Schwab Investment Management Inc | 0.00% | 157,971 | $603,449 | $391,768 | -$211,681 | -35.08% | |
| Bank Of New York Mellon Corp | 0.00% | 137,689 | $525,971 | $341,469 | -$184,502 | -35.08% | |
| J. Goldman & Co Lp | 0.02% | 135,000 | $515,700 | $334,800 | -$180,900 | -35.08% | |
| Superstring Capital Management Lp | 0.29% | 121,457 | $463,966 | $301,213 | -$162,753 | -35.08% | |
| Fisher Asset Management, Llc | 0.00% | 99,566 | $380,342 | $246,924 | -$133,418 | -35.08% | |
| American Century Companies Inc | 0.00% | 98,487 | $376,220 | $244,248 | -$131,972 | -35.08% | |
| Bridgeway Capital Management, Llc | 0.01% | 85,330 | $325,961 | $211,618 | -$114,343 | -35.08% | |
| Nuveen, Llc | 0.00% | 72,610 | $277,371 | $180,073 | -$97,298 | -35.08% | |
| Two Sigma Investments, Lp | 0.00% | 69,652 | $266,071 | $172,737 | -$93,334 | -35.08% | |
| Fmr Llc | 0.00% | 68,200 | $260,524 | $169,136 | -$91,388 | -35.08% | |
| Xtx Topco Ltd | 0.00% | 63,948 | $244,281 | $158,591 | -$85,690 | -35.08% | |
| Rhumbline Advisers | 0.00% | 63,245 | $241,589 | $156,848 | -$84,741 | -35.08% | |
| Trexquant Investment Lp | 0.00% | 59,616 | $227,733 | $147,848 | -$79,885 | -35.08% | |
| Deutsche Bank Ag\ | 0.00% | 57,713 | $220,464 | $143,128 | -$77,336 | -35.08% |
Frequently asked questions about TARA
Who are the largest institutional holders of TARA?
The largest institutional holders of TARA reported in the latest SEC Form 13F filings include Janus Henderson Group Plc, Blackrock, Inc., Millennium Management Llc, Velan Capital Investment Management Lp, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported TARA position.
What is TARA institutional ownership?
This page tracks TARA positions reported by institutional investment managers through SEC Form 13F. PROTARA THERAPEUTIC INC (TARA) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own TARA?
InsiderSet currently tracks 117 institutional managers reporting TARA 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 TARA shareholders.
How much TARA stock do institutions own?
Institutional investment managers disclosed approximately $181.96M in TARA holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was TARA institutional ownership last updated?
The latest TARA 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 TARA 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 TARA position after the reporting date.
Are institutions buying or selling TARA?
Institutional buying and selling can be analyzed by comparing TARA positions across consecutive 13F reporting periods. InsiderSet's TARA Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View TARA ownership changes.
How has TARA institutional ownership changed over time?
InsiderSet tracks TARA institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.