CPST

Calamos S&P 500 Alt SeptETF
UnclassifiedUSCUSIP 12811T886◍ Confluence graph
Tracked 13F Holders
10
-9 QoQ
13F Value (tracked)
$19.5M
13F Moves · latest Q
2 added
2 trimmed
Recent Filings
15

Who owns CPST?

10 tracked 13F filers

10 tracked 13F filers disclose a position in CPST as of the latest SEC 13F filings, a combined $19.5M 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.

#FundPosition valueSharesLast moveAs ofHistory
1Calamos Advisors LLC
$11.7M
433K
+51%
Added · +146K sh
Q1 2026
2OSAIC HOLDINGS, INC.
$2.8M
104K
−4.5%
Reduced · −5K sh
Q1 2026
3Calamos Wealth Management LLC
$2.8M
102K
−18%
Reduced · −23K sh
Q1 2026
4OLD MISSION CAPITAL LLC
$770K
29K
+0.1%
Added · +43 sh
Q1 2026
5COMMONWEALTH EQUITY SERVICES, LLC
$553K
20K
Held
Q1 2026
6SUSQUEHANNA INTERNATIONAL GROUP, LLP
$519K
19K
New
+19K sh
Q1 2026
7HARBOUR INVESTMENTS, INC.
$312K
12K
−25%
Reduced · −4K sh
Q1 2026
8BURKETT FINANCIAL SERVICES, LLC
$95K
3K
−53%
Reduced · −4K sh
Q2 2026
9CREATIVE FINANCIAL DESIGNS INC /ADV
$8K
301
Held
Q2 2026
10UBS Group AG
$998
37
−80%
Reduced · −152 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 CPST being bought or sold by institutions?

Last quarter, 0 funds opened a new position in CPST and 2 added to an existing one, while 2 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)
0
funds
Added
2
funds
Reduced
2
funds
Exited
0
funds

Funds that own CPST also own

CompanyCo-held byCombined value
NVIDIA CORPNVDA5 funds$1.7B
APPLE INCAAPL5 funds$1.5B
MICROSOFT CORPMSFT5 funds$1.1B
ALPHABET INC-CL AGOOGL5 funds$898.2M
AMAZON.COM INCAMZN5 funds$875.9M
BROADCOM INCAVGO5 funds$608.2M
SS SPDR S&P 500 ETF TRUST-USSPY5 funds$530.7M
META PLATFORMS INC-CLASS AMETA5 funds$489.1M
ISHARES CORE S&P 500 ETFIVV5 funds$380.3M
ELI LILLY & COLLY5 funds$353.0M
TESLA INCTSLA5 funds$346.8M
ALPHABET INC-CL CGOOG5 funds$340.8M

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

Institutional ownership over time

2 funds-8 since Q3 2024
0714Q3 2024Q1 2025Q3 2025Q1 2026Q2 2026
funds holding aggregate valuelatest $103K

Share classes

Class13F holdersValue held
CAIEmc116 funds$410.3M
CAIQmc42 funds$90.1M
CPSLLADDERED S&P 50026 funds$52.9M
CPNJmc26 funds$9.7M
CPSMmc23 funds$23.9M
CPSDS&P 500 STRUCTU22 funds$25.2M
CPSJS&P 500 STRUCTUR22 funds$22.1M
CPRJmc21 funds$11.2M

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

Recent filings

15 shown

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Ask your agent what changed in CPST

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/CPST/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for CPST.
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 CPST. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.