SEM Institutional Ownership & Shareholders
SELECT MEDICAL HOLDINGS CORP (SEM) is currently held by 176 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $1.43B 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 SEM tracked by InsiderSet, reporting ownership valued at approximately $215.85M 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 $215.85M, representing an estimated gain of +0.00% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 71% of the total disclosed SEM value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Verition Fund Management Llc, Glazer Capital, Llc, and several other long-term asset managers with concentrated positions in SELECT MEDICAL HOLDINGS CORP (SEM).
This page ranks the largest institutional SEM 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
176
Total Reported Value
$1.43B
Largest Holder
Blackrock, Inc.
Largest Position
$215.85M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 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. | 0.00% | 13,073,640 | $215,845,792 | $215,845,796 | +$4 | +0.00% | |
| Verition Fund Management Llc | 1.40% | 12,025,235 | $198,536,630 | $198,536,630 | -$0 | -0.00% | |
| Glazer Capital, Llc | 4.37% | 10,744,069 | $177,277,000 | $177,384,579 | +$107,579 | +0.06% | |
| Dimensional Fund Advisors Lp | 0.02% | 5,518,861 | $91,116,601 | $91,116,395 | -$206 | -0.00% | |
| Two Sigma Investments, Lp | 0.06% | 4,943,691 | $81,620,338 | $81,620,338 | +$0 | +0.00% | |
| Wells Fargo & Company/Mn | 0.01% | 4,506,456 | $74,401,592 | $74,401,589 | -$3 | -0.00% | |
| Aqr Arbitrage Llc | 0.68% | 2,880,889 | $47,563,477 | $47,563,477 | +$0 | +0.00% | |
| Millennium Management Llc | 0.03% | 2,754,016 | $45,468,804 | $45,468,804 | +$0 | +0.00% | |
| Decagon Asset Management Llp | 8.95% | 2,715,536 | $44,833,499 | $44,833,499 | +$0 | +0.00% | |
| Polar Asset Management Partners Inc. | 0.71% | 2,362,979 | $39,012,783 | $39,012,783 | +$0 | +0.00% | |
| Hsbc Holdings Plc | 0.02% | 2,246,658 | $37,136,999 | $37,092,324 | -$44,675 | -0.12% | |
| Balyasny Asset Management L.P. | 0.05% | 1,623,940 | $26,811,249 | $26,811,249 | +$0 | +0.00% | |
| State Street Corp | 0.00% | 1,493,609 | $24,659,485 | $24,659,485 | -$0 | -0.00% | |
| Geode Capital Management, Llc | 0.00% | 1,450,063 | $23,978,636 | $23,940,540 | -$38,096 | -0.16% | |
| Alpine Associates Management Inc. | 1.35% | 1,304,404 | $21,535,710 | $21,535,710 | +$0 | +0.00% | |
| Arrowstreet Capital, Limited Partnership | 0.01% | 1,289,169 | $21,284,180 | $21,284,180 | +$0 | +0.00% | |
| Northern Trust Corp | 0.00% | 1,093,051 | $18,046,272 | $18,046,272 | +$0 | +0.00% | |
| Westchester Capital Management, Llc | 0.82% | 983,315 | $16,234,531 | $16,234,531 | -$0 | -0.00% | |
| Goldman Sachs Group Inc | 0.00% | 871,540 | $14,389,129 | $14,389,125 | -$4 | -0.00% | |
| Woodline Partners Lp | 0.04% | 860,622 | $14,208,869 | $14,208,869 | +$0 | +0.00% | |
| D. E. Shaw & Co., Inc. | 0.01% | 798,290 | $13,179,768 | $13,179,768 | -$0 | -0.00% | |
| Qube Research & Technologies Ltd | 0.01% | 772,843 | $12,759,638 | $12,759,638 | -$0 | -0.00% | |
| Morgan Stanley | 0.00% | 511,408 | $8,443,391 | $8,443,346 | -$45 | -0.00% | |
| Hrt Financial Lp | 0.01% | 478,462 | $7,899,000 | $7,899,408 | +$408 | +0.01% | |
| Nuveen, Llc | 0.00% | 411,906 | $6,800,563 | $6,800,568 | +$5 | +0.00% | |
| Susquehanna International Group, Llp | 0.01% | 399,224 | $6,591,188 | $6,591,188 | +$0 | +0.00% | |
| Public Sector Pension Investment Board | 0.02% | 379,176 | $6,260,196 | $6,260,196 | -$0 | -0.00% | |
| Meteora Capital, Llc | 0.51% | 375,328 | $6,196,665 | $6,196,665 | +$0 | +0.00% | |
| Healthcare Of Ontario Pension Plan Trust Fund | 0.01% | 300,000 | $4,953,000 | $4,953,000 | +$0 | +0.00% | |
| Groupe La Francaise | 0.06% | 282,497 | $4,664,025 | $4,664,025 | +$0 | +0.00% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 271,754 | $4,426,872 | $4,486,659 | +$59,787 | +1.35% | |
| Bank Of America Corp | 0.00% | 242,992 | $4,011,805 | $4,011,798 | -$7 | -0.00% | |
| Legal & General Group Plc | 0.00% | 214,193 | $3,536,326 | $3,536,326 | +$0 | +0.00% | |
| Swiss National Bank | 0.00% | 211,600 | $3,493,516 | $3,493,516 | +$0 | +0.00% | |
| Man Group Plc | 0.01% | 210,395 | $3,473,622 | $3,473,621 | -$1 | -0.00% | |
| Maven Securities Ltd | 0.23% | 203,300 | $3,356,483 | $3,356,483 | +$0 | +0.00% | |
| Tudor Investment Corp Et Al | 0.01% | 201,568 | $3,327,888 | $3,327,888 | -$0 | -0.00% | |
| Bluefin Capital Management, Llc | 0.95% | 200,000 | $3,302,000 | $3,302,000 | +$0 | +0.00% | |
| Jpmorgan Chase & Co | 0.00% | 191,396 | $3,242,326 | $3,159,948 | -$82,378 | -2.54% | |
| Boothbay Fund Management, Llc | 0.06% | 182,907 | $3,019,795 | $3,019,795 | -$0 | -0.00% | |
| Ameriprise Financial Inc | 0.00% | 182,077 | $3,006,090 | $3,006,091 | +$1 | +0.00% | |
| Sg Americas Securities, Llc | 0.00% | 177,220 | $2,926,000 | $2,925,902 | -$98 | -0.00% | |
| State Board Of Administration Of Florida Retirement System | 0.00% | 177,000 | $2,922,270 | $2,922,270 | +$0 | +0.00% | |
| Omers Administration Corp | 0.02% | 175,800 | $2,905,974 | $2,902,458 | -$3,516 | -0.12% | |
| Carmignac Gestion | 0.04% | 174,516 | $2,881,259 | $2,881,259 | +$0 | +0.00% | |
| Credit Industriel Et Commercial | 0.30% | 167,503 | $2,765,475 | $2,765,475 | -$0 | -0.00% | |
| Norges Bank | 0.00% | 167,058 | $2,758,128 | $2,758,128 | -$0 | -0.00% | |
| Aqr Capital Management Llc | 0.00% | 166,669 | $2,751,707 | $2,751,705 | -$2 | -0.00% | |
| Charles Schwab Investment Management Inc | 0.00% | 161,356 | $2,663,988 | $2,663,988 | -$0 | -0.00% | |
| Ubs Group Ag | 0.00% | 154,804 | $2,555,814 | $2,555,814 | +$0 | +0.00% |
Frequently asked questions about SEM
Who are the largest institutional holders of SEM?
The largest institutional holders of SEM reported in the latest SEC Form 13F filings include Blackrock, Inc., Verition Fund Management Llc, Glazer Capital, Llc, Dimensional Fund Advisors Lp, and Two Sigma Investments, Lp. InsiderSet ranks institutional holders by their latest reported SEM position.
What is SEM institutional ownership?
This page tracks SEM positions reported by institutional investment managers through SEC Form 13F. SELECT MEDICAL HOLDINGS CORP (SEM) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own SEM?
InsiderSet currently tracks 176 institutional managers reporting SEM 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 SEM shareholders.
How much SEM stock do institutions own?
Institutional investment managers disclosed approximately $1.43B in SEM holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was SEM institutional ownership last updated?
The latest SEM 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 SEM 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 SEM position after the reporting date.
Are institutions buying or selling SEM?
Institutional buying and selling can be analyzed by comparing SEM positions across consecutive 13F reporting periods. InsiderSet's SEM Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View SEM ownership changes.
How has SEM institutional ownership changed over time?
InsiderSet tracks SEM institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.