Chang John B. — SEC Form 4 filings
SEC reporting owner CIK 1775672. 17 Form 4 filings on record with FilingPulse; latest filed 2026-01-05.
Transaction summary — filings shown
Covers all 17 filings on record, filed 2024-01-30 to 2026-01-05. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 3 legs across 3 filings — 5,735 shares, $435,736 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 20.
- Largest priced transaction: sale of 2,280 shares @ $80.41 ($183,328) in COGENT COMMUNICATIONS HOLDINGS, INC., filed 2024-11-12.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | VP & CHIEF LEGAL OFFICER | 17 | — | 3 legs · 5,735 sh · $435,736 | 20 |
Form 4 filings — Chang John B.
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-01-05 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Grant/award (A): 9,600 @ $0 · Grant/award (A): 100,000 @ $0 | EDGAR |
| 2025-12-02 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Grant/award (A): 2,400 @ $0 | EDGAR |
| 2025-06-03 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Gift (G): 398 @ $0 | EDGAR |
| 2025-05-15 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Gift (G): 756 @ $0 · Gift (G): 504 @ $0 | EDGAR |
| 2025-04-11 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Gift (G): 357 @ $0 | EDGAR |
| 2025-03-12 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Gift (G): 357 @ $0 | EDGAR |
| 2025-03-07 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Gift (G): 715 @ $0 · Gift (G): 715 @ $0 | EDGAR |
| 2025-01-13 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Grant/award (A): 9,600 @ $0 | EDGAR |
| 2024-12-19 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Gift (G): 970 @ $0 · Gift (G): 485 @ $0 · Gift (G): 485 @ $0 | EDGAR |
| 2024-12-06 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Gift (G): 900 @ $0 | EDGAR |
| 2024-12-03 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Grant/award (A): 2,400 @ $0 | EDGAR |
| 2024-11-12 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Sale (S): 2,280 @ $80.41 | EDGAR |
| 2024-09-13 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Sale (S): 1,400 @ $71.67 | EDGAR |
| 2024-08-26 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Sale (S): 2,055 @ $74 | EDGAR |
| 2024-02-14 | 4/A | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Holdings only — no transactions reported | EDGAR |
| 2024-02-01 | 4 | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Gift (G): 375 @ $0 · Gift (G): 375 @ $0 | EDGAR |
| 2024-01-30 | 4/A | COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) | Grant/award (A): 9,600 @ $0 · Grant/award (A): 30,000 @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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