LANTHEUS HOLDINGS INC (LNTH) Institutional Shareholders
LANTHEUS HOLDINGS INC (LNTH) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $7.45B in LNTH holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of LNTH tracked by InsiderSet, reporting ownership valued at approximately $931.63M 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 $844.38M, representing an estimated loss of -9.37% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 48% of the total disclosed LNTH value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Fmr Llc, Janus Henderson Group Plc, and several other long-term asset managers with concentrated positions in LANTHEUS HOLDINGS INC (LNTH).
This page ranks the largest institutional LNTH 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
443
Total Reported Value
$7.45B
Largest Holder
Blackrock, Inc.
Largest Position
$931.63M
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
62
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 8,397,642 | $931,634,407 | $844,382,903 | -$87,251,504 | -9.37% | |
| Fmr Llc | 0.02% | 3,879,971 | $430,443,947 | $390,131,084 | -$40,312,863 | -9.37% | |
| Janus Henderson Group Plc | 0.18% | 4,774,841 | $362,171,897 | $480,110,263 | +$117,938,366 | +32.56% | |
| Vanguard Portfolio Management Llc | 0.02% | 3,238,471 | $359,275,973 | $325,628,259 | -$33,647,714 | -9.37% | |
| Vanguard Capital Management Llc | 0.01% | 2,932,214 | $325,299,821 | $294,834,118 | -$30,465,703 | -9.37% | |
| American Century Companies Inc | 0.14% | 2,816,547 | $312,467,724 | $283,203,801 | -$29,263,923 | -9.37% | |
| State Street Corp | 0.01% | 2,500,696 | $277,427,214 | $251,444,983 | -$25,982,231 | -9.37% | |
| Price T Rowe Associates Inc | 0.02% | 1,903,354 | $211,159,000 | $191,382,245 | -$19,776,755 | -9.37% | |
| Geode Capital Management, Llc | 0.01% | 1,841,367 | $204,315,435 | $185,149,452 | -$19,165,983 | -9.38% | |
| Morgan Stanley | 0.01% | 1,726,303 | $191,516,192 | $173,579,767 | -$17,936,425 | -9.37% | |
| Reinhart Partners, Llc. | 4.05% | 1,599,379 | $177,436,919 | $160,817,558 | -$16,619,361 | -9.37% | |
| Dimensional Fund Advisors Lp | 0.03% | 1,466,260 | $162,661,393 | $147,432,443 | -$15,228,950 | -9.36% | |
| Citadel Advisors Llc | 0.09% | 1,376,480 | $152,706,691 | $138,405,064 | -$14,301,627 | -9.37% | |
| Carmignac Gestion | 1.93% | 1,340,100 | $148,670,694 | $134,747,055 | -$13,923,639 | -9.37% | |
| Swedbank Ab | 0.11% | 1,201,243 | $133,265,898 | $120,784,984 | -$12,480,914 | -9.37% | |
| Wellington Management Group Llp | 0.02% | 1,013,063 | $112,389,209 | $101,863,485 | -$10,525,724 | -9.37% | |
| Brown Advisory Inc | 0.16% | 915,683 | $101,585,874 | $92,071,926 | -$9,513,948 | -9.37% | |
| Ubs Group Ag | 0.01% | 835,494 | $92,689,704 | $84,008,922 | -$8,680,782 | -9.37% | |
| Northern Trust Corp | 0.01% | 818,394 | $90,792,631 | $82,289,517 | -$8,503,114 | -9.37% | |
| Goldman Sachs Group Inc | 0.01% | 814,096 | $90,315,778 | $81,857,353 | -$8,458,425 | -9.37% | |
| Marshall Wace, Llp | 0.07% | 773,978 | $85,865,119 | $77,823,488 | -$8,041,631 | -9.37% | |
| Deerfield Management Company, L.P. | 0.87% | 752,999 | $83,537,709 | $75,714,049 | -$7,823,660 | -9.37% | |
| Assenagon Asset Management S.A. | 0.10% | 714,980 | $79,319,881 | $71,891,239 | -$7,428,642 | -9.37% | |
| Jacobs Levy Equity Management, Inc | 0.28% | 699,583 | $77,611,738 | $70,343,071 | -$7,268,667 | -9.37% | |
| Jpmorgan Chase & Co | 0.00% | 699,229 | $76,952,885 | $70,307,476 | -$6,645,409 | -8.64% | |
| Nomura Asset Management International Inc. | 0.11% | 671,042 | $74,445,000 | $67,473,273 | -$6,971,727 | -9.36% | |
| Charles Schwab Investment Management Inc | 0.01% | 665,457 | $73,825,800 | $66,911,701 | -$6,914,099 | -9.37% | |
| Td Asset Management Inc | 0.06% | 653,736 | $72,525,472 | $65,733,155 | -$6,792,317 | -9.37% | |
| Point72 Asset Management, L.P. | 0.11% | 629,806 | $69,870,678 | $63,326,993 | -$6,543,685 | -9.37% | |
| Ameriprise Financial Inc | 0.01% | 619,298 | $68,705,129 | $62,270,414 | -$6,434,715 | -9.37% | |
| Norges Bank | 0.01% | 586,845 | $65,104,584 | $59,007,265 | -$6,097,319 | -9.37% | |
| Holocene Advisors, Lp | 0.14% | 546,961 | $60,679,853 | $54,996,929 | -$5,682,924 | -9.37% | |
| Boston Partners | 0.05% | 500,622 | $55,068,880 | $50,337,542 | -$4,731,338 | -8.59% | |
| Victory Capital Management Inc | 0.03% | 470,051 | $52,147,457 | $47,263,628 | -$4,883,829 | -9.37% | |
| Vanguard Fiduciary Trust Co | 0.01% | 466,076 | $51,706,471 | $46,863,942 | -$4,842,529 | -9.37% | |
| Bank Of New York Mellon Corp | 0.01% | 441,831 | $49,016,754 | $44,426,107 | -$4,590,647 | -9.37% | |
| Polaris Capital Management, Llc | 4.44% | 424,500 | $47,094,030 | $42,683,475 | -$4,410,555 | -9.37% | |
| Summit Street Capital Management, Llc | 6.24% | 400,699 | $44,453,546 | $40,290,284 | -$4,163,262 | -9.37% | |
| Epoch Investment Partners, Inc. | 0.24% | 386,993 | $42,933,003 | $38,912,146 | -$4,020,857 | -9.37% | |
| Voya Investment Management Llc | 0.04% | 370,571 | $41,111,146 | $37,260,914 | -$3,850,232 | -9.37% | |
| Private Capital Management, Llc | 3.60% | 358,224 | $39,741,371 | $36,019,423 | -$3,721,948 | -9.37% | |
| Millennium Management Llc | 0.03% | 336,399 | $37,320,105 | $33,824,919 | -$3,495,186 | -9.37% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.01% | 486,498 | $36,900,874 | $48,917,374 | +$12,016,500 | +32.56% | |
| Bank Of America Corp | 0.00% | 330,268 | $36,639,903 | $33,208,447 | -$3,431,456 | -9.37% | |
| Brigade Capital Management, Lp | 23.86% | 328,745 | $36,484,120 | $33,055,310 | -$3,428,810 | -9.40% | |
| Bnp Paribas Financial Markets | 0.02% | 300,967 | $33,389,279 | $30,262,232 | -$3,127,047 | -9.37% | |
| Portolan Capital Management, Llc | 1.20% | 288,691 | $32,027,380 | $29,027,880 | -$2,999,500 | -9.37% | |
| Balyasny Asset Management L.P. | 0.06% | 277,821 | $30,821,462 | $27,934,902 | -$2,886,560 | -9.37% | |
| Silvercrest Asset Management Group Llc | 0.20% | 270,710 | $30,032,818 | $27,219,891 | -$2,812,928 | -9.37% | |
| Aqr Capital Management Llc | 0.01% | 261,248 | $28,579,225 | $26,268,486 | -$2,310,739 | -8.09% |
Frequently asked questions about LNTH
Who owns the most LNTH stock?
The largest holders of LNTH are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for LANTHEUS HOLDINGS INC (LNTH).
Is LNTH widely held by superinvestors?
Many widely followed stocks like LNTH appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly LNTH is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.