Ticker · CUSIP 13100M509
Holders (tracked)
12
Combined shares
3,587,836
Combined value
$153.51M
Last close
$49.78
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
Price is +16.3% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
20 events
- +124,516 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−19,864 shares · 2025Q413F
- D.E. Shaw & Co. trimmed2026-02-17−3,906 shares · 2025Q413F
- AQR Capital Management trimmed2026-02-17−12,779 shares · 2025Q413F
- Two Sigma Investments added2026-02-17+1,300 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−523,006 shares · 2025Q413F
- T. Rowe Price trimmed2026-02-17−545,040 shares · 2025Q413F
- Wellington Management trimmed2026-02-17−19,734 shares · 2025Q413F
- Ray Dalio (Bridgewater Associates) added2026-02-13+29,642 shares · 2025Q413F
- Renaissance Technologies added2026-02-12+202,800 shares · 2025Q413F
- −210,160 shares · 2025Q313F
- Two Sigma Investments trimmed2025-11-14−6,524 shares · 2025Q313F
- D.E. Shaw & Co. trimmed2025-11-14−159,863 shares · 2025Q313F
- AQR Capital Management added2025-11-14+6,024 shares · 2025Q313F
- Steve Cohen (Point72) exited2025-11-14−162,318 shares · 2025Q313F
- Wellington Management added2025-11-14+139,672 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−282,204 shares · 2025Q313F
- T. Rowe Price added2025-11-14+1,182,878 shares · 2025Q313F
- +35,894 shares · 2025Q313F
- Renaissance Technologies added2025-11-13+23,200 shares · 2025Q313F
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of CALX…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| T. Rowe Price | 2020Q4 | $0.69 | +7074.2% | $34.3M |
| AQR Capital Management | 2016Q1 | $37.70 | +32.0% | $1.8M |
| Paul Tudor Jones (Tudor Investment) | 2018Q4 | $39.11 | +27.3% | $6.2M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $39.61 | +25.7% | $71.8M |
| Two Sigma Investments | 2016Q1 | $42.74 | +16.5% | $974K |
| Renaissance Technologies | 2016Q1 | $48.86 | +1.9% | $23.1M |
| D.E. Shaw & Co. | 2016Q1 | $49.17 | +1.3% | $1.9M |
| Wellington Management | 2018Q3 | $50.71 | -1.8% | $31.8M |
| Ken Griffin (Citadel Advisors) | 2016Q3 | $53.51 | -7.0% | $956K |
| Ken Griffin (Citadel Advisors) | 2016Q3 | $53.51 | -7.0% | $956K |
| Ken Griffin (Citadel Advisors) | 2016Q3 | $53.51 | -7.0% | $956K |
| Ray Dalio (Bridgewater Associates) | 2025Q3 | $57.55 | -13.5% | $3.3M |
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions1
- Paul Tudor Jones (Tudor Investment)+124,516$6.6M
Added to3
- Renaissance Technologies+202,800$10.7M
- Ray Dalio (Bridgewater Associates)+29,642$1.6M
- Two Sigma Investments+1,300$69K
Trimmed6
- Izzy Englander (Millennium Mgmt)−523,006$27.7M
- Ken Griffin (Citadel Advisors)−19,864$1.1M
- Wellington Management−19,734$1.0M
- AQR Capital Management−12,779$675K
- D.E. Shaw & Co.−3,906$207K
- T. Rowe Price−545,040$29K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 15 | $5.60B |
| 2022Q2 | 12 | $8.07B |
| 2022Q3 | 14 | $28.3M |
| 2022Q4 | 15 | $666.1M |
| 2023Q1 | 13 | $534.4M |
| 2023Q2 | 13 | $522.1M |
| 2023Q3 | 13 | $444.5M |
| 2023Q4 | 13 | $423.7M |
| 2024Q1 | 11 | $386.0M |
| 2024Q2 | 12 | $410.5M |
| 2024Q3 | 11 | $75.9M |
| 2024Q4 | 12 | $105.1M |
| 2025Q1 | 12 | $88.3M |
| 2025Q2 | 12 | $211.3M |
| 2025Q3 | 11 | $192.8M |
| 2025Q4 | 12 | $153.5M |
Who owns CALX
12 super-investors · 2025Q4
Tracked stake
3.59M
shares
Combined value
$154M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added3Trim8
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Izzy Englander Millennium Mgmt | 1.44M | $76M |
| 2 | Wellington Management | 639.7K | $34M |
| 3 | Renaissance Technologies | 463.6K | $25M |
| 4 | Paul Tudor Jones Tudor Investment | 124.5K | $7M |
| 5 | Ray Dalio Bridgewater Associates | 65.5K | $3M |
| 6 | Ken Griffin Citadel Advisors | 45.8K | $2M |
| 7 | D.E. Shaw & Co. | 38.7K | $2M |
| 8 | AQR Capital Management | 36.8K | $2M |
| 9 | Two Sigma Investments | 19.6K | $1M |
| 10 | Ken Griffin Citadel Advisors | 19.2K | $1M |
| 11 | Ken Griffin Citadel Advisors | 4.2K | $222K |
| 12 | T. Rowe Price | 688.2K | $36K |
Recent moves
20 transactions
- +1,300 · 2025Q4
- TRIMT. Rowe Price−545,040 · 2025Q4
- −12,779 · 2025Q4
- −19,864 · 2025Q4
- −523,006 · 2025Q4
- TRIMD.E. Shaw & Co.−3,906 · 2025Q4
- +124,516 · 2025Q4
- −19,734 · 2025Q4
- +29,642 · 2025Q4
- +202,800 · 2025Q4
- −210,160 · 2025Q3
- −162,318 · 2025Q3
- TRIMD.E. Shaw & Co.−159,863 · 2025Q3
- +1,182,878 · 2025Q3
- +139,672 · 2025Q3
- −282,204 · 2025Q3
- +6,024 · 2025Q3
- −6,524 · 2025Q3
- +23,200 · 2025Q3
- +35,894 · 2025Q3
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