John P Calamos Sr
CIK 1248580 · Global CIO · last filed 2026-07-01
John P Calamos Sr is a Global CIO who has filed 277 SEC Form 4 insider transactions across 7 companies since 2007. Across all open-market trades the lifetime net is +$38.1M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $32.0M across reported positions. 342 SEC filings were submitted jointly with Calamos Asset Management, Inc. /DE/.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
CLMS price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
NAPERVILLE, IL 60563
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| CPZ | President and Chairman | 11,017 | $12.86 | $141.7K | $902.1K | 9 | 2025-12-18 |
| CCD | President and Chairman | 1,450,158 | $20.80 | $30.16M | $10.67M | 96 | 2025-04-07 |
| CSQ | President and Global CIO | 0 | $19.57 | $0 | -$414.5K | 1 | 2017-01-25 |
| CHI | President and Global CIO | 22,915 | $10.75 | $246.3K | -$269.5K | 1 | 2017-01-25 |
| Calamos Asset Management, Inc. /DE/ (CLMS) Delisted | Founder, Chairman & Global CIO | 1,414,238 | — | — | $26.62M | 152 | 2016-08-25 |
| CGO | president and chairman | 105,600 | $12.06 | $1.27M | $219.0K | 3 | 2007-08-23 |
| CHW | president and chairman | 19,300 | $7.72 | $149.0K | $376.7K | 2 | 2007-08-22 |
Recent Filings
277 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-07-01 | — | Other (J) | — | $0 | |
| 2026-07-01 | — | Other (J) | — | $0 | |
| 2026-06-02 | — | Mixed | +27,773 | $299.2K | |
| 2026-04-23 | — | Mixed | +27,845 | $299.9K | |
| 2026-03-16 | — | Buy (P) | +741 | $8.0K | |
| 2026-03-11 | — | Mixed | +28,742 | $299.9K | |
| 2026-03-10 | — | Mixed | +28,742 | $299.9K | |
| 2025-12-18 | CPZ | Sell (S) | −13,517 | -$199.3K | EDGAR |
| 2025-12-17 | CPZ | Sell (S) | −25,000 | -$368.1K | EDGAR |
| 2025-12-16 | CPZ | Sell (S) | −35,000 | -$511.3K | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.