ALKS Institutional Ownership & Shareholders
ALKERMES PLC (ALKS) is currently held by 408 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $9.20B 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 ALKS tracked by InsiderSet, reporting ownership valued at approximately $1.53B 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 $1.33B, representing an estimated loss of -13.47% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 52% of the total disclosed ALKS value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Baker Bros. Advisors Lp, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in ALKERMES PLC (ALKS).
This page ranks the largest institutional ALKS 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
408
Total Reported Value
$9.20B
Largest Holder
Blackrock, Inc.
Largest Position
$1.53B
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
65
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.02% | 29,235,739 | $1,531,806,565 | $1,325,548,406 | -$206,258,159 | -13.47% | |
| Baker Bros. Advisors Lp | 2.63% | 10,012,267 | $524,592,729 | $453,956,186 | -$70,636,543 | -13.47% | |
| Vanguard Portfolio Management Llc | 0.02% | 9,490,818 | $497,271,409 | $430,313,688 | -$66,957,721 | -13.47% | |
| State Street Corp | 0.01% | 9,160,575 | $479,968,327 | $415,340,471 | -$64,627,856 | -13.47% | |
| Vanguard Capital Management Llc | 0.01% | 7,515,025 | $393,749,735 | $340,731,234 | -$53,018,502 | -13.47% | |
| Price T Rowe Associates Inc | 0.04% | 6,737,328 | $353,003,000 | $305,470,452 | -$47,532,548 | -13.47% | |
| Renaissance Technologies LLC | Jim Simons | 0.47% | 6,460,928 | $338,520,325 | $292,938,476 | -$45,581,849 | -13.47% |
| Geode Capital Management, Llc | 0.01% | 4,477,876 | $234,660,916 | $203,026,898 | -$31,634,018 | -13.48% | |
| Dimensional Fund Advisors Lp | 0.04% | 4,194,873 | $219,794,330 | $190,195,542 | -$29,598,788 | -13.47% | |
| Deep Track Capital, Lp | 3.09% | 4,000,000 | $209,580,000 | $181,360,000 | -$28,220,000 | -13.47% | |
| American Century Companies Inc | 0.09% | 3,954,239 | $207,182,449 | $179,285,196 | -$27,897,253 | -13.47% | |
| Holocene Advisors, Lp | 0.43% | 3,601,472 | $188,699,125 | $163,290,740 | -$25,408,385 | -13.47% | |
| Commodore Capital Lp | 9.36% | 3,000,000 | $157,185,000 | $136,020,000 | -$21,165,000 | -13.47% | |
| Wellington Management Group Llp | 0.03% | 2,814,804 | $147,481,656 | $127,623,213 | -$19,858,443 | -13.47% | |
| Primecap Management Co/Ca/ | 0.08% | 2,528,680 | $132,490,188 | $114,650,351 | -$17,839,837 | -13.47% | |
| First Trust Advisors Lp | 0.07% | 2,421,016 | $126,849,134 | $109,768,865 | -$17,080,269 | -13.47% | |
| Charles Schwab Investment Management Inc | 0.02% | 2,335,117 | $122,348,496 | $105,874,205 | -$16,474,291 | -13.47% | |
| Nuveen, Llc | 0.03% | 2,324,197 | $121,776,303 | $105,379,092 | -$16,397,211 | -13.47% | |
| Norges Bank | 0.01% | 2,156,814 | $113,006,270 | $97,789,947 | -$15,216,323 | -13.47% | |
| Bvf Inc/Il | 2.89% | 2,154,704 | $112,895,716 | $97,694,279 | -$15,201,437 | -13.47% | |
| Goldman Sachs Group Inc | 0.01% | 2,023,984 | $106,046,642 | $91,767,435 | -$14,279,207 | -13.47% | |
| Bain Capital Life Sciences Investors, Llc | 6.04% | 1,937,938 | $101,538,262 | $87,866,109 | -$13,672,153 | -13.47% | |
| Northern Trust Corp | 0.01% | 1,831,619 | $95,967,679 | $83,045,605 | -$12,922,074 | -13.47% | |
| Morgan Stanley | 0.00% | 1,751,882 | $91,789,896 | $79,430,330 | -$12,359,566 | -13.47% | |
| Rtw Investments, Lp | 0.75% | 1,672,356 | $87,623,093 | $75,824,621 | -$11,798,472 | -13.47% | |
| Citadel Advisors Llc | 0.05% | 1,645,101 | $86,195,067 | $74,588,879 | -$11,606,188 | -13.47% | |
| Loomis Sayles & Co L P | 0.10% | 1,585,518 | $83,073,216 | $71,887,386 | -$11,185,830 | -13.47% | |
| Adage Capital Partners Gp, L.L.C. | 0.10% | 1,368,000 | $71,676,360 | $62,025,120 | -$9,651,240 | -13.47% | |
| D. E. Shaw & Co., Inc. | 0.04% | 1,312,031 | $68,743,864 | $59,487,486 | -$9,256,378 | -13.47% | |
| Driehaus Capital Management Llc | 0.38% | 1,238,809 | $64,907,398 | $56,167,600 | -$8,739,798 | -13.47% | |
| Vanguard Fiduciary Trust Co | 0.01% | 1,177,945 | $61,718,428 | $53,408,026 | -$8,310,402 | -13.47% | |
| Bnp Paribas Asset Management Holding S.A. | 0.06% | 1,159,216 | $60,737,122 | $52,558,853 | -$8,178,269 | -13.47% | |
| Fmr Llc | 0.00% | 1,134,410 | $59,437,416 | $51,434,149 | -$8,003,267 | -13.47% | |
| Affinity Asset Advisors, Llc | 2.88% | 1,125,000 | $58,944,375 | $51,007,500 | -$7,936,875 | -13.47% | |
| Bank Of New York Mellon Corp | 0.01% | 1,097,282 | $57,492,084 | $49,750,766 | -$7,741,318 | -13.47% | |
| T. Rowe Price Investment Management, Inc. | 0.04% | 1,090,947 | $57,161,000 | $49,463,537 | -$7,697,463 | -13.47% | |
| Two Sigma Investments, Lp | 0.04% | 1,038,311 | $54,402,305 | $47,077,021 | -$7,325,284 | -13.47% | |
| Soleus Capital Management, L.P. | 1.86% | 1,029,252 | $53,927,659 | $46,666,286 | -$7,261,373 | -13.47% | |
| Principal Financial Group Inc | 0.03% | 983,822 | $51,547,355 | $44,606,489 | -$6,940,866 | -13.47% | |
| Marshall Wace, Llp | 0.04% | 969,954 | $50,825,589 | $43,977,714 | -$6,847,875 | -13.47% | |
| Summit Partners Public Asset Management, Llc | 1.29% | 950,234 | $49,787,510 | $43,083,610 | -$6,703,900 | -13.47% | |
| Bank Of America Corp | 0.00% | 918,303 | $48,114,486 | $41,635,858 | -$6,478,628 | -13.47% | |
| Victory Capital Management Inc | 0.03% | 916,709 | $48,030,968 | $41,563,586 | -$6,467,382 | -13.47% | |
| Pictet Asset Management Holding Sa | 0.04% | 838,026 | $43,975,787 | $37,996,099 | -$5,979,688 | -13.60% | |
| Artisan Partners Limited Partnership | 0.07% | 831,006 | $43,540,559 | $37,677,812 | -$5,862,747 | -13.47% | |
| Panagora Asset Management Inc | 0.12% | 765,543 | $40,110,625 | $34,709,720 | -$5,400,905 | -13.47% | |
| Frazier Life Sciences Management, L.P. | 0.80% | 700,647 | $36,710,400 | $31,767,335 | -$4,943,065 | -13.47% | |
| Public Sector Pension Investment Board | 0.09% | 677,405 | $35,492,635 | $30,713,543 | -$4,779,092 | -13.47% | |
| Frontier Capital Management Co Llc | 0.32% | 659,562 | $34,557,740 | $29,904,541 | -$4,653,199 | -13.46% | |
| Bnp Paribas Financial Markets | 0.02% | 655,140 | $34,326,060 | $29,704,048 | -$4,622,012 | -13.47% |
Frequently asked questions about ALKS
Who are the largest institutional holders of ALKS?
The largest institutional holders of ALKS reported in the latest SEC Form 13F filings include Blackrock, Inc., Baker Bros. Advisors Lp, Vanguard Portfolio Management Llc, State Street Corp, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported ALKS position.
What is ALKS institutional ownership?
This page tracks ALKS positions reported by institutional investment managers through SEC Form 13F. ALKERMES PLC (ALKS) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ALKS?
InsiderSet currently tracks 408 institutional managers reporting ALKS 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 ALKS shareholders.
How much ALKS stock do institutions own?
Institutional investment managers disclosed approximately $9.20B in ALKS holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ALKS institutional ownership last updated?
The latest ALKS 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 ALKS 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 ALKS position after the reporting date.
Are institutions buying or selling ALKS?
Institutional buying and selling can be analyzed by comparing ALKS positions across consecutive 13F reporting periods. InsiderSet's ALKS Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ALKS ownership changes.
How has ALKS institutional ownership changed over time?
InsiderSet tracks ALKS institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.