LANTHEUS HOLDINGS INC (LNTH) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $5.23B 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 $620.70M 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 $844.42M, representing an estimated gain of +36.04% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 54% of the total disclosed LNTH value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Farallon Capital Management 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
398
Total Reported Value
$5.23B
Largest Holder
Blackrock, Inc.
Largest Position
$620.70M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
61
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% | 8,183,193 | $620,695,194 | $844,423,686 | +$223,728,492 | +36.04% | |
| Farallon Capital Management Llc | 2.76% | 5,583,479 | $423,506,882 | $576,159,198 | +$152,652,316 | +36.04% | |
| Janus Henderson Group Plc | 0.18% | 4,774,841 | $362,171,897 | $492,715,843 | +$130,543,946 | +36.04% | |
| Fmr Llc | 0.02% | 4,626,453 | $350,916,434 | $477,403,685 | +$126,487,251 | +36.04% | |
| Vanguard Portfolio Management Llc | 0.01% | 3,174,274 | $240,768,683 | $327,553,334 | +$86,784,651 | +36.04% | |
| Vanguard Capital Management Llc | 0.01% | 2,914,314 | $221,050,717 | $300,728,062 | +$79,677,345 | +36.04% | |
| State Street Corp | 0.01% | 2,429,803 | $184,300,558 | $250,731,372 | +$66,430,814 | +36.04% | |
| American Century Companies Inc | 0.07% | 1,781,106 | $135,096,890 | $183,792,328 | +$48,695,438 | +36.04% | |
| Geode Capital Management, Llc | 0.01% | 1,765,952 | $133,970,958 | $182,228,587 | +$48,257,629 | +36.02% | |
| Morgan Stanley | 0.01% | 1,646,463 | $124,884,266 | $169,898,517 | +$45,014,251 | +36.04% | |
| Reinhart Partners, Llc. | 3.41% | 1,564,878 | $118,697,159 | $161,479,761 | +$42,782,602 | +36.04% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,379,570 | $104,625,767 | $142,357,828 | +$37,732,061 | +36.06% | |
| Swedbank Ab | 0.10% | 1,228,743 | $93,200,157 | $126,793,990 | +$33,593,833 | +36.04% | |
| Td Asset Management Inc | 0.07% | 1,133,518 | $85,977,340 | $116,967,722 | +$30,990,382 | +36.04% | |
| Point72 Asset Management, L.P. | 0.13% | 974,210 | $73,893,829 | $100,528,730 | +$26,634,901 | +36.04% | |
| Ubs Group Ag | 0.01% | 867,675 | $65,813,149 | $89,535,383 | +$23,722,234 | +36.04% | |
| Nomura Asset Management International Inc. | 0.11% | 840,417 | $63,746,000 | $86,722,630 | +$22,976,630 | +36.04% | |
| Deerfield Management Company, L.P. | 0.74% | 827,999 | $62,803,724 | $85,441,217 | +$22,637,493 | +36.04% | |
| Northern Trust Corp | 0.01% | 804,923 | $61,053,410 | $83,060,004 | +$22,006,594 | +36.04% | |
| Wellington Management Group Llp | 0.01% | 768,850 | $58,317,272 | $79,337,632 | +$21,020,360 | +36.04% | |
| Mackenzie Financial Corp | 0.07% | 714,561 | $54,199,452 | $73,735,550 | +$19,536,098 | +36.04% | |
| Brown Advisory Inc | 0.09% | 687,607 | $52,154,977 | $70,954,166 | +$18,799,189 | +36.04% | |
| Charles Schwab Investment Management Inc | 0.01% | 657,413 | $49,864,776 | $67,838,447 | +$17,973,671 | +36.04% | |
| Epoch Investment Partners, Inc. | 0.30% | 649,751 | $49,283,613 | $67,047,806 | +$17,764,193 | +36.04% | |
| Polaris Capital Management, Llc | 3.83% | 617,000 | $46,799,450 | $63,668,230 | +$16,868,780 | +36.04% | |
| Marshall Wace, Llp | 0.05% | 611,747 | $46,401,012 | $63,126,173 | +$16,725,161 | +36.04% | |
| Healthcare Of Ontario Pension Plan Trust Fund | 0.07% | 598,857 | $45,423,303 | $61,796,054 | +$16,372,751 | +36.04% | |
| Jacobs Levy Equity Management, Inc | 0.18% | 577,645 | $43,814,373 | $59,607,188 | +$15,792,815 | +36.04% | |
| Goldman Sachs Group Inc | 0.01% | 555,577 | $42,140,494 | $57,329,991 | +$15,189,497 | +36.04% | |
| Balyasny Asset Management L.P. | 0.08% | 539,382 | $40,912,125 | $55,658,829 | +$14,746,704 | +36.04% | |
| Bank Of America Corp | 0.00% | 531,646 | $40,325,351 | $54,860,551 | +$14,535,200 | +36.04% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.01% | 486,498 | $36,900,874 | $50,201,729 | +$13,300,855 | +36.04% | |
| Boston Partners | 0.04% | 470,658 | $35,715,970 | $48,567,199 | +$12,851,229 | +35.98% | |
| Bank Of New York Mellon Corp | 0.01% | 463,751 | $35,175,508 | $47,854,466 | +$12,678,958 | +36.04% | |
| Vanguard Fiduciary Trust Co | 0.01% | 458,977 | $34,813,405 | $47,361,837 | +$12,548,432 | +36.04% | |
| Portolan Capital Management, Llc | 1.68% | 417,390 | $31,659,032 | $43,070,474 | +$11,411,442 | +36.04% | |
| Summit Street Capital Management, Llc | 4.46% | 415,474 | $31,513,703 | $42,872,762 | +$11,359,059 | +36.04% | |
| William Blair Investment Management, Llc | 0.10% | 399,551 | $30,305,943 | $41,229,668 | +$10,923,725 | +36.04% | |
| Longaeva Partners L.P. | 1.40% | 383,945 | $29,122,228 | $39,619,285 | +$10,497,057 | +36.04% | |
| Brigade Capital Management, Lp | 19.47% | 363,745 | $27,590,058 | $37,534,847 | +$9,944,789 | +36.04% | |
| Invesco Ltd. | 0.00% | 362,562 | $27,500,328 | $37,412,773 | +$9,912,445 | +36.04% | |
| Private Capital Management, Llc | 2.76% | 357,644 | $27,127,297 | $36,905,284 | +$9,777,987 | +36.04% | |
| Adage Capital Partners Gp, L.L.C. | 0.04% | 346,755 | $26,301,367 | $35,781,648 | +$9,480,281 | +36.04% | |
| Voya Investment Management Llc | 0.03% | 336,987 | $25,560,464 | $34,773,689 | +$9,213,225 | +36.04% | |
| Alyeska Investment Group, L.P. | 0.07% | 305,549 | $23,175,892 | $31,529,601 | +$8,353,709 | +36.04% | |
| Bnp Paribas Financial Markets | 0.01% | 299,705 | $22,732,624 | $30,926,559 | +$8,193,935 | +36.04% | |
| Silvercrest Asset Management Group Llc | 0.16% | 292,806 | $22,209,591 | $30,214,651 | +$8,005,060 | +36.04% | |
| Citadel Advisors Llc | 0.02% | 284,544 | $21,582,662 | $29,362,095 | +$7,779,433 | +36.04% | |
| Ameriprise Financial Inc | 0.00% | 269,945 | $20,475,367 | $27,855,625 | +$7,380,258 | +36.04% | |
| Victory Capital Management Inc | 0.01% | 269,496 | $20,441,272 | $27,809,292 | +$7,368,020 | +36.04% |
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.