DOSSIER · 13F Holders · Q1 2026Cheap mega-capRe-rated
ON 0.5 03/01/29

ON SEMICONDUCTOR CORP

104 institutions still hold ON SEMICONDUCTOR CORP as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 682189AU9·104 13F holders·last filed Mar 31, 2026
Market cap
7.1%
vs prior quarter
13F value held
$875M
73.0% inst. owned
of float
Holders
104
-92 QoQ
filers reporting
Activity
+11 / −85
+980 added · −745 reduced
this quarter
Concentration
11.93%
Calamos Advisors LLC #1
top holder share
AI Holders Summary · Q1 2026

104 institutions reported ON 0.5 03/01/29 in Q1 2026. Calamos Advisors LLC leads at 11.9% of the visible book. -92 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
Calamos Advisors LLC
CIK 0001316507
$104M106.2M0.37%Q1 2026
02
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$102M100.0M0.05%Q1 2026
03
CAMDEN ASSET MANAGEMENT L P /CA
CIK 0000903944
$88M90.4M3.00%Q1 2026
04
AQR Arbitrage LLC
CIK 0001167456
$86M90.4M1.80%Q4 2025
05
WOLVERINE ASSET MANAGEMENT LLC
CIK 0001279891
$82M84.3M0.79%Q1 2026
06
BNP PARIBAS FINANCIAL MARKETS
CIK 0001166588
$51M51.7M0.02%Q1 2026
07
BlackRock, Inc.
CIK 0002012383
$48M49.1M0.00%Q1 2026
08
LMR Partners LLP
CIK 0001578621
$36M37.1M0.08%Q1 2026
09
Point72 Asset Management, L.P.
CIK 0001603466
$34M35.0M0.04%Q1 2026
10
Wellesley Asset Management
CIK 0001533551
$32M32.6M3.36%Q1 2026
11
STATE STREET CORP
CIK 0000093751
$31M31.6M0.00%Q1 2026
12
Empyrean Capital Partners, LP
CIK 0001317195
$24M25.0M0.80%Q1 2026
13
ADVENT CAPITAL MANAGEMENT /DE/
CIK 0001097278
$22M22.7M0.61%Q1 2026
14
SHENKMAN CAPITAL MANAGEMENT INC
CIK 0001275228
$22M21.9M2.62%Q1 2026
15
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$22M22.2M0.00%Q1 2026
16
O'Connor Alternative Investments LLC
CIK 0002081629
$20M20.0M1.69%Q1 2026
17
FMR LLC
CIK 0000315066
$18M18.6M0.00%Q1 2026
18
Brevan Howard Capital Management LP
CIK 0001512857
$17M18.0M0.15%Q1 2026
19
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$17M17.5M0.01%Q1 2026
20
JPMORGAN CHASE & CO
CIK 0000019617
$17M17.5M0.00%Q1 2026
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