13F Insight
DOSSIER · 13F Holders · Q1 2026
ON 0.5 03/01/29

ON SEMICONDUCTOR CORP

101 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 682189AU9·101 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$878M
visible holders
Holders
101
filers reporting
Concentration
11.88%
Calamos Advisors LLC #1
top holder share
AI Holders Summary · Q1 2026

101 institutions reported ON 0.5 03/01/29 in Q1 2026. Calamos Advisors LLC leads at 11.9% of the visible book.

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 202602
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$102M100.0M0.05%Q1 202603
CAMDEN ASSET MANAGEMENT L P /CA
CIK 0000903944
$88M90.4M3.00%Q1 202604
AQR Arbitrage LLC
CIK 0001167456
$86M90.4M1.80%Q4 202505
WOLVERINE ASSET MANAGEMENT LLC
CIK 0001279891
$82M84.3M0.79%Q1 202606
BNP PARIBAS FINANCIAL MARKETS
CIK 0001166588
$51M51.7M0.02%Q1 202607
BlackRock, Inc.
CIK 0002012383
$48M49.1M0.00%Q1 202608
LMR Partners LLP
CIK 0001578621
$36M37.1M0.08%Q1 202609
Point72 Asset Management, L.P.
CIK 0001603466
$34M35.0M0.04%Q1 202610
Wellesley Asset Management
CIK 0001533551
$32M32.6M3.36%Q1 202611
STATE STREET CORP
CIK 0000093751
$31M31.6M0.00%Q1 202612
Empyrean Capital Partners, LP
CIK 0001317195
$24M25.0M0.80%Q1 202613
ADVENT CAPITAL MANAGEMENT /DE/
CIK 0001097278
$22M22.7M0.61%Q1 202614
SHENKMAN CAPITAL MANAGEMENT INC
CIK 0001275228
$22M21.9M2.62%Q1 202615
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$22M22.2M0.00%Q1 202616
THRIVENT FINANCIAL FOR LUTHERANS
CIK 0000314984
$20M20.8M0.04%Q1 202617
O'Connor Alternative Investments LLC
CIK 0002081629
$20M20.0M1.69%Q1 202618
FMR LLC
CIK 0000315066
$18M18.6M0.00%Q1 202619
Brevan Howard Capital Management LP
CIK 0001512857
$17M18.0M0.15%Q1 202620
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$17M17.5M0.01%Q1 2026
Page 1 of 6
81 more holders available. Log in →