CPSO

Calamos S&P 500 Alt Prot OctETF$28.24 0.05%
UnclassifiedCUSIP 12811T829· EOD Sep 15, 2026

Among active 13F managers last quarter, 2 opened and 1 added, while 5 reduced; the largest holder to move was Calamos Advisors LLC (−3.3%).

Tracked 13F holders
19
10 in Q2 2026 filings
13F value (tracked)
$14.8M
13F moves · latest Q
3 added
5 reduced

Price & smart-money activity

$28.24 0.05%2Y +11.7%
$24.70$25.65$26.61$27.56$28.52Oct 2024Feb 2025JulDecApr 2026Sep42337454
Hover for who · click for detailEnd-of-day closing prices52w $26.73 – $28.25

Who owns CPSO?

19 tracked 13F filers · ranked by shares held

19 tracked 13F filers disclose a position in CPSO as of the latest SEC 13F filings, a combined $14.8M 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.

#FundSharesPosition valueLast moveAs ofHistory
1Calamos Advisors LLC344K
$9.6M
−3.3%
Reduced · −12K sh
Q2 2026
2Susquehanna International Group, LLP27K
$719K
−8.2%
Reduced · −2K sh
Q1 2026
3Commonwealth Equity Services, LLC24K
$650K
−6.6%
Reduced · −2K sh
Q1 2026
4Blue Water Asset Management20K
$570K
−34%
Reduced · −10K sh
Q2 2026
5Calamos Wealth Management LLC20K
$553K
−22%
Reduced · −6K sh
Q2 2026
6Old Mission Capital LLC19K
$511K
+8.1%
Added · +1K sh
Q1 2026
7Harbour Investments, Inc.14K
$388K
−32%
Reduced · −7K sh
Q1 2026
8Rooted Wealth Advisors, Inc.12K
$348K
Held
Q2 2026
9Grantvest Financial Group LLC12K
$331K
−19%
Reduced · −3K sh
Q2 2026
10Fiduciary Financial Advisors11K
$308K
New
+11K sh
Q2 2026
11Sloy Dahl & Holst, LLC11K
$299K
Held
Q2 2026
12Security Financial Services, INC.10K
$282K
Held
Q2 2026
13Spire Wealth Management2K
$65K
Held
Q1 2026
14Osaic Holdings, Inc.2K
$55K
Held
Q1 2026
15Morgan Stanley2K
$54K
Held
Q1 2026
16Tucker Asset Management LLC2K
$50K
New
+2K sh
Q2 2026
17Advisory Services Network, LLC1K
$32K
New
+1K sh
Q1 2026
18Creative Financial Designs Inc492
$14K
−44%
Reduced · −379 sh
Q2 2026
19New England Capital Financial Advisors LLC408
$11K
Held
Q2 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 CPSO being bought or sold by institutions?

Last quarter, 2 funds opened a new position in CPSO and 1 added to an existing one, while 5 reduced. Based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).

Opened
2
funds took a first position
Added
1
added to an existing position
Reduced
5
reduced, still holding
Biggest moves · ranked by size of the change, positions above a floor

Funds that own CPSO also own

CompanyCo-held byTheir position there
Nvidia CorpNVDA10 funds$1.8B
Vanguard Total Stock MKT ETFVTI10 funds$137.1M
Apple IncAAPL9 funds$1.6B
Microsoft CorpMSFT9 funds$945.5M
Amazon.com IncAMZN9 funds$909.0M
Tesla IncTSLA9 funds$848.6M
SS SPDR S&P 500 ETF Trust-USSPY9 funds$642.0M
JPMorgan Chase & CoJPM9 funds$311.6M
Ishares Core S&P 500 ETFIVV9 funds$256.0M
Johnson & JohnsonJNJ9 funds$211.0M
Coca-Cola CoKO9 funds$103.7M
Vanguard Mid-Cap ETFVO9 funds$42.2M

Ranked by how many of CPSO's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in CPSO.

Institutional ownership over time

10 tracked filers in Q2 2026 filingsstill filing
01019Q4 2024Q2 2025Q4 2025Q2 2026
tracked filers holding their reported valueQ2 2026 filings so far: $12.0M
Each bar counts tracked filers with a position in that quarter's filings, so the newest bar excludes filers still on an earlier quarter. Arkolith's tracked universe has grown over this window; part of any long-run rise is coverage, not new buyers.

Share classes

Class13F holdersValue held
CAIEmc153 funds$516.8M
CAIQmc54 funds$115.9M
CAGEETF31 funds$20.7M
CPSMmc30 funds$27.4M
CPSJS&P 500 STR JULY30 funds$23.5M
CPNJmc30 funds$10.4M
CPSLLADDERED S&P 500 ETF29 funds$56.6M
CPSDS&P 500 STRUCTU29 funds$26.8M

Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.

Recent filings

15 most recent

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Connected entities for CPSO

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Ask your agent what changed in CPSO

This ETF 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/CPSO/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for CPSO.
Tell me what changed, whether insider activity
corroborates it, and cite the SEC evidence.

13F holdings + quarter-over-quarter ownership changes + end-of-day price history + the live filing stream, joined for CPSO. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.