SEM

Select Medical Holdings Corp
Health CareUSCUSIP 81619Q105◍ Confluence graph
Tracked 13F Holders
215
-184 QoQ
13F Value (tracked)
$1.4B
Insider Net · 180d
$0
0↑ 0↓
Recent Filings
15
Smart-money sentimentBullish
BearishBullish
13F funds (latest Q)38 adding · 16 trimming
Insider net (180d)$0

Who owns SEM?

215 tracked 13F filers

215 tracked 13F filers disclose a position in SEM as of the latest SEC 13F filings, a combined $1.4B in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

All quarters use one ordinary-share-equivalent series. Historical ADS are converted at 2 ADS = 1 ordinary share. Expand a row for the exact calculation; the residual is not classified as a trade.
1 source-reported value row is withheld because the reported units do not agree with same-security peers. Share counts remain visible and unchanged.
#FundPosition valueSharesLast moveAs ofHistory
1BlackRock, Inc.
$281.2M
17.3M
−7.7%
Reduced · −1.4M sh
Q1 2026
2VANGUARD PORTFOLIO MANAGEMENT LLC
$109.5M
6.7M
First observed position
No prior filed position
Q1 2026
3DIMENSIONAL FUND ADVISORS LP
$90.2M
5.5M
+3.8%
Added · +203K sh
Q1 2026
4FIL Ltd
$80.8M
5.0M
New
+5.0M sh
Q1 2026
5VANGUARD CAPITAL MANAGEMENT LLC
$78.5M
4.8M
First observed position
No prior filed position
Q1 2026
6STATE STREET CORP
$70.4M
4.3M
−1.8%
Reduced · −77K sh
Q1 2026
7GEODE CAPITAL MANAGEMENT, LLC
$43.4M
2.7M
−15%
Reduced · −456K sh
Q1 2026
8HSBC HOLDINGS PLC
$36.6M
2.2M
77×
Added · +2.2M sh
Q1 2026
9GOLDMAN SACHS GROUP INC
$33.9M
2.1M
+319%
Added · +1.6M sh
Q1 2026
10T. Rowe Price Investment Management, Inc.
Withheld
2.0M
−28%
Reduced · −795K sh
Q1 2026
11SOROS FUND MANAGEMENT LLC
$29.9M
1.8M
New
+1.8M sh
Q1 2026
12AQR Arbitrage LLC
$29.3M
1.8M
New
+1.8M sh
Q1 2026
13CHARLES SCHWAB INVESTMENT MANAGEMENT INC
$27.8M
1.7M
+1.1%
Added · +18K sh
Q1 2026
14Qube Research & Technologies Ltd
$24.4M
1.5M
+708%
Added · +1.3M sh
Q1 2026
15NEXPOINT ASSET MANAGEMENT, L.P.
$24.1M
1.5M
New
+1.5M sh
Q1 2026
16Polar Asset Management Partners Inc.
$22.8M
1.4M
New
+1.4M sh
Q1 2026
17NORTHERN TRUST CORP
$22.3M
1.4M
+5.7%
Added · +73K sh
Q1 2026
18D. E. Shaw & Co., Inc.
$22.2M
1.4M
−38%
Reduced · −851K sh
Q1 2026
19Woodline Partners LP
$20.0M
1.2M
−8.5%
Reduced · −114K sh
Q1 2026
20ALPINE ASSOCIATES MANAGEMENT INC.
$19.2M
1.2M
New
+1.2M sh
Q1 2026
21TIG Advisors, LLC
$17.4M
1.1M
14×
Added · +996K sh
Q1 2026
22Bank of New York Mellon Corp
$17.4M
1.1M
+0.5%
Added · +5K sh
Q1 2026
23Grantham, Mayo, Van Otterloo & Co. LLC
$16.1M
987K
New
+987K sh
Q1 2026
24BALYASNY ASSET MANAGEMENT L.P.
$14.7M
905K
16×
Added · +848K sh
Q1 2026
25MILLENNIUM MANAGEMENT LLC
$13.9M
853K
+56%
Added · +305K sh
Q1 2026

Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

Is SEM being bought or sold by institutions?

Last quarter, 20 funds opened a new position in SEM and 18 added to an existing one, while 16 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).

Opened (NEW)
20
funds
Added
18
funds
Reduced
16
funds
Exited
0
funds

Funds that own SEM also own

CompanyCo-held byCombined value
MICROSOFT CORPMSFT81 funds$36.8B
AMAZON.COM INCAMZN80 funds$27.3B
ALPHABET INC-CL AGOOGL80 funds$25.6B
META PLATFORMS INC-CLASS AMETA80 funds$17.0B
SALESFORCE INCCRM79 funds$3.9B
NVIDIA CORPNVDA78 funds$50.2B
BROADCOM INCAVGO78 funds$19.0B
TESLA INCTSLA78 funds$10.1B
ELI LILLY & COLLY78 funds$9.3B
APPLE INCAAPL77 funds$39.9B
ADVANCED MICRO DEVICESAMD77 funds$4.3B
APPLIED MATERIALS INCAMAT77 funds$4.2B

Ranked by how many of SEM's institutional holders also hold each name, a cross-fund conviction signal.

Insider activity (Form 4)

Full insider page →
Buys · 180d
$0
0 insiders
Sells · 180d
$0
0 insiders
Net
$0
0 P/S txns
Signal
Mixed
open-market
DateInsiderRoleActionSharesValue
May 5, 2025Khanuja Parvinderjit S.DirectorBuy (P)21K$315K
Apr 28, 2025CHERNOW DAVID SCEO, DirectorSell (S)225K$4.0M
Dec 4, 2024Breighner Robert G. JRVICE PRESIDENT, COMPLIANCESell (S)5K$100K
Nov 26, 2024TAVENNER MARILYN BDirectorSell (S)32K$675K
Nov 26, 2024ORTENZIO ROBERT AEXECUTIVE CHAIRMAN, DirectorSell (S)3.8M$74.4M
Apr 8, 2024ORTENZIO ROBERT AEXECUTIVE CHAIRMAN, DirectorSell (S)50K$1.5M
Mar 8, 2024ORTENZIO ROBERT AEXECUTIVE CHAIRMAN, DirectorSell (S)50K$1.4M
Feb 8, 2024ORTENZIO ROBERT AEXECUTIVE CHAIRMAN, DirectorSell (S)50K$1.3M
Jan 8, 2024ORTENZIO ROBERT AEXECUTIVE CHAIRMAN, DirectorSell (S)100K$2.7M
Dec 14, 2023ORTENZIO ROBERT AEXECUTIVE CHAIRMAN, DirectorSell (S)100K$2.5M
Sep 8, 2023ORTENZIO ROBERT AEXECUTIVE CHAIRMAN, DirectorSell (S)50K$1.3M
Aug 8, 2023ORTENZIO ROBERT AEXECUTIVE CHAIRMAN, DirectorSell (S)50K$1.5M

Institutional ownership over time

35 funds-162 since Q3 2024
0110219Q3 2024Q1 2025Q3 2025Q1 2026Q2 2026
funds holding aggregate valuelatest $11.0M

Recent filings

15 shown

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Ask your agent what changed in SEM

This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.

Copy-paste
curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/stocks/SEM/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for SEM.
Tell me what changed, whether insider activity
corroborates it, and cite the SEC evidence.

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for SEM. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.