SELECT MEDICAL HOLDINGS CORP (SEM) Top Institutional Shareholders
SELECT MEDICAL HOLDINGS CORP (SEM) 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 $1.47B in SEM holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of SEM tracked by InsiderSet, reporting ownership valued at approximately $281.22M 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 $285.71M, representing an estimated gain of +1.60% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 58% of the total disclosed SEM value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Dimensional Fund Advisors Lp, 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
271
Total Reported Value
$1.47B
Largest Holder
Blackrock, Inc.
Largest Position
$281.22M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
121
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% | 17,263,327 | $281,219,589 | $285,708,062 | +$4,488,473 | +1.60% | |
| Vanguard Portfolio Management Llc | 0.01% | 6,723,557 | $109,526,744 | $111,274,868 | +$1,748,124 | +1.60% | |
| Dimensional Fund Advisors Lp | 0.02% | 5,536,331 | $90,187,518 | $91,626,278 | +$1,438,760 | +1.60% | |
| Fil Ltd | 0.06% | 4,960,732 | $80,810,324 | $82,100,115 | +$1,289,791 | +1.60% | |
| Vanguard Capital Management Llc | 0.00% | 4,819,685 | $78,512,669 | $79,765,787 | +$1,253,118 | +1.60% | |
| State Street Corp | 0.00% | 4,319,877 | $70,370,796 | $71,493,964 | +$1,123,168 | +1.60% | |
| Geode Capital Management, Llc | 0.00% | 2,661,944 | $43,371,322 | $44,055,173 | +$683,851 | +1.58% | |
| Hsbc Holdings Plc | 0.02% | 2,245,163 | $36,596,043 | $37,157,448 | +$561,405 | +1.53% | |
| Goldman Sachs Group Inc | 0.00% | 2,081,883 | $33,913,872 | $34,455,164 | +$541,292 | +1.60% | |
| Soros Fund Management Llc | 0.41% | 1,833,473 | $29,867,275 | $30,343,978 | +$476,703 | +1.60% | |
| Aqr Arbitrage Llc | 0.48% | 1,798,360 | $29,295,284 | $29,762,858 | +$467,574 | +1.60% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,704,603 | $27,767,983 | $28,211,180 | +$443,197 | +1.60% | |
| Qube Research & Technologies Ltd | 0.03% | 1,495,433 | $24,360,604 | $24,749,416 | +$388,812 | +1.60% | |
| Nexpoint Asset Management, L.P. | 1.68% | 1,478,770 | $24,089,163 | $24,473,644 | +$384,481 | +1.60% | |
| Polar Asset Management Partners Inc. | 0.54% | 1,400,000 | $22,806,000 | $23,170,000 | +$364,000 | +1.60% | |
| Northern Trust Corp | 0.00% | 1,366,882 | $22,266,509 | $22,621,897 | +$355,388 | +1.60% | |
| D. E. Shaw & Co., Inc. | 0.02% | 1,360,925 | $22,169,468 | $22,523,309 | +$353,841 | +1.60% | |
| Woodline Partners Lp | 0.08% | 1,226,195 | $19,974,717 | $20,293,527 | +$318,810 | +1.60% | |
| Alpine Associates Management Inc. | 1.13% | 1,176,700 | $19,168,443 | $19,474,385 | +$305,942 | +1.60% | |
| Tig Advisors, Llc | 0.83% | 1,071,046 | $17,447,339 | $17,725,811 | +$278,472 | +1.60% | |
| Bank Of New York Mellon Corp | 0.00% | 1,067,640 | $17,391,852 | $17,669,442 | +$277,590 | +1.60% | |
| Grantham, Mayo, Van Otterloo & Co. Llc | 0.04% | 986,809 | $16,075,119 | $16,331,689 | +$256,570 | +1.60% | |
| Invesco Ltd. | 0.00% | 934,413 | $15,221,587 | $15,464,535 | +$242,948 | +1.60% | |
| Balyasny Asset Management L.P. | 0.03% | 904,737 | $14,738,166 | $14,973,397 | +$235,231 | +1.60% | |
| Millennium Management Llc | 0.01% | 853,442 | $13,902,570 | $14,124,465 | +$221,895 | +1.60% | |
| Morgan Stanley | 0.00% | 851,429 | $13,869,787 | $14,091,150 | +$221,363 | +1.60% | |
| Vanguard Fiduciary Trust Co | 0.00% | 709,077 | $11,550,864 | $11,735,224 | +$184,360 | +1.60% | |
| Dana Investment Advisors, Inc. | 0.33% | 676,987 | $11,028,118 | $11,204,135 | +$176,017 | +1.60% | |
| Adage Capital Partners Gp, L.L.C. | 0.02% | 658,467 | $10,726,427 | $10,897,629 | +$171,202 | +1.60% | |
| Bank Of America Corp | 0.00% | 639,398 | $10,415,791 | $10,582,037 | +$166,246 | +1.60% | |
| Cambria Investment Management, L.P. | 0.50% | 553,728 | $9,020,229 | $9,164,198 | +$143,969 | +1.60% | |
| Gardner Lewis Asset Management L P | 1.95% | 551,920 | $8,990,777 | $9,134,276 | +$143,499 | +1.60% | |
| Principal Financial Group Inc | 0.00% | 535,625 | $8,725,337 | $8,864,594 | +$139,257 | +1.60% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 528,194 | $8,604,280 | $8,741,611 | +$137,331 | +1.60% | |
| Picton Mahoney Asset Management | 0.08% | 500,000 | $8,145,000 | $8,275,000 | +$130,000 | +1.60% | |
| Victory Capital Management Inc | 0.00% | 435,643 | $7,096,624 | $7,209,892 | +$113,268 | +1.60% | |
| Public Sector Pension Investment Board | 0.02% | 394,194 | $6,421,420 | $6,523,911 | +$102,491 | +1.60% | |
| Two Sigma Investments, Lp | 0.01% | 385,804 | $6,284,747 | $6,385,056 | +$100,309 | +1.60% | |
| Caxton Associates Llp | 0.13% | 349,564 | $5,694,398 | $5,785,284 | +$90,886 | +1.60% | |
| Rhumbline Advisers | 0.00% | 316,066 | $5,148,687 | $5,230,892 | +$82,205 | +1.60% | |
| Bridgeway Capital Management, Llc | 0.10% | 312,836 | $5,096,098 | $5,177,436 | +$81,338 | +1.60% | |
| Healthcare Of Ontario Pension Plan Trust Fund | 0.01% | 300,000 | $4,887,000 | $4,965,000 | +$78,000 | +1.60% | |
| Man Group Plc | 0.01% | 300,000 | $4,887,000 | $4,965,000 | +$78,000 | +1.60% | |
| Segall Bryant & Hamill, Llc | 0.07% | 281,857 | $4,566,084 | $4,664,733 | +$98,649 | +2.16% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 271,754 | $4,426,872 | $4,497,529 | +$70,657 | +1.60% | |
| Squarepoint Ops Llc | 0.01% | 270,752 | $4,410,550 | $4,480,946 | +$70,396 | +1.60% | |
| Denali Advisors Llc | 0.48% | 263,100 | $4,285,899 | $4,354,305 | +$68,406 | +1.60% | |
| Legal & General Group Plc | 0.00% | 262,383 | $4,274,219 | $4,342,439 | +$68,220 | +1.60% | |
| Ubs Group Ag | 0.00% | 257,440 | $4,193,698 | $4,260,632 | +$66,934 | +1.60% | |
| Nuveen, Llc | 0.00% | 233,085 | $3,796,955 | $3,857,557 | +$60,602 | +1.60% |
Frequently asked questions about SEM
Who owns the most SEM stock?
The largest holders of SEM 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 SELECT MEDICAL HOLDINGS CORP (SEM).
Is SEM widely held by superinvestors?
Many widely followed stocks like SEM appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly SEM 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.