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CPSM · Calamos S&P 500 Structured Alt Protection ETF - May ETF

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$29.58 -0.01 (-0.04%) At close · Sep 4

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →
Holders: 26
Total Value: $27,408,626
Total Shares: 949,842

Institutional Ownership Trend

8 quarters

Holder Concentration

Across 26 13F filers · Δ vs Dec 31, 2025
Top Holder
34.4%
Jun 2024 → Mar 2026 · range 21.3% – 45.7%
+5.6 pts
Top 5
63.7%
Jun 2024 → Mar 2026 · range 59.8% – 91.8%
−2.2 pts
Top 10
82.0%
Jun 2024 → Mar 2026 · range 81.9% – 97.2%
−2.5 pts
HHI
1,515
Jun 2024 → Mar 2026 · range 995 – 3,007
Moderately concentrated+230

Quarterly Activity

vs Dec 31, 2025
New
3
Increased
2
Decreased
10
Sold Out
5
Unchanged
11
Holder count: -2
Institutional value: +1.7%
Shares held: +0.9%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Calamos Advisors LLC +55,887 326,775
OLD MISSION CAPITAL LLC +16,653 23,905

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
COMMONWEALTH EQUITY SERVICES, LLC −50,609 38,800
SUSQUEHANNA INTERNATIONAL GROUP, LLP −20,766 18,515
Amplius Wealth Advisors, LLC −18,368 82,863
OSAIC HOLDINGS, INC. −7,250 9,008
CENTAURUS FINANCIAL, INC. −6,541 97,241

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Cambridge Investment Research Advisors, Inc. 46,915 $1,353,779
LeClair Wealth Partners LLC 15,962 $460,599
LPL Financial LLC 15,806 $456,097

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
CAPITAL ADVISORY GROUP ADVISORY SERVICES, LLC 17,419 $498,618
Motiv8 Investments LLC 1,273 $36,439
Allworth Financial LP 217 $6,211
UBS Group AG 105 $3,005
Camelot Portfolios, LLC 3 $85
Filter: New 3 Increased 2 Reduced 10 Sold out 5 Unchanged 11
Showing 26 of 26
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Calamos Advisors LLC CPSM $9,429,419 34.40% 326,775
CENTAURUS FINANCIAL, INC. CPSM $2,805,986 10.24% 97,241
Amplius Wealth Advisors, LLC CPSM $2,391,094 8.72% 82,863
Advisory Services Network, LLC CPSM $1,489,633 5.43% 51,623
Cambridge Investment Research Advisors, Inc. CPSM $1,353,779 4.94% 46,915
Sugar Maple Asset Management, LLC CPSM $1,125,384 4.11% 39,000
COMMONWEALTH EQUITY SERVICES, LLC CPSM $1,119,612 4.08% 38,800
BCGM Wealth Management, LLC CPSM $1,028,716 3.75% 35,650
Cetera Investment Advisers CPSM $996,426 3.64% 34,531
JPMORGAN CHASE & CO CPSM $729,710 2.66% 25,288
OLD MISSION CAPITAL LLC CPSM $689,802 2.52% 23,905
SUSQUEHANNA INTERNATIONAL GROUP, LLP CPSM $534,268 1.95% 18,515
HARBOUR INVESTMENTS, INC. CPSM $480,510 1.75% 16,652
Blue Water Asset Management CPSM $460,599 1.68% 15,962
LeClair Wealth Partners LLC CPSM $460,599 1.68% 15,962
LPL Financial LLC CPSM $456,097 1.66% 15,806
Calamos Wealth Management LLC CPSM $414,660 1.51% 14,370
NBZ Investment Advisors LLC CPSM $315,857 1.15% 10,946
Mutual Advisors, LLC CPSM $291,070 1.06% 10,087
OSAIC HOLDINGS, INC. CPSM $259,934 0.95% 9,008
Wick Capital Partners, LLC CPSM $257,164 0.94% 8,912
VISTA INVESTMENT PARTNERS LLC CPSM $217,862 0.79% 7,550
Farther Finance Advisors, LLC CPSM $80,796 0.29% 2,800
Pinnacle Wealth Planning Services, Inc. CPSM $11,542 0.04% 400
New England Capital Financial Advisors LLC CPSM $5,222 0.02% 181
IFP Advisors, Inc CPSM $2,885 0.01% 100