John B. Chang
Insider
First SEC filing: Aug. 7, 2019 · Latest: Aug. 7, 2019
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Dec. 31, 2025 | CCOI | A | 9,600 | · | · | 88,847 Direct | +12.11% | Acquired | (price as of 2026-10-06) |
| Dec. 31, 2025 | CCOI | A | 100,000 | · | · | 188,847 Direct | +112.55% | Acquired | (price as of 2026-10-06) |
| Dec. 1, 2025 | CCOI | A | 2,400 | · | · | 79,247 Direct | +3.12% | Acquired | (price as of 2026-10-06) |
| June 2, 2025 | CCOI | G | 398 | · | · | 76,847 Direct | -0.52% | Disposed | (price as of 2026-10-06) |
| May 13, 2025 | CCOI | G | 756 | · | · | 77,245 Direct | -0.97% | Disposed | (price as of 2026-10-06) |
| May 13, 2025 | CCOI | G | 504 | · | · | 3,089 Indirect | +19.50% | Acquired | (price as of 2026-10-06) |
| April 10, 2025 | CCOI | G | 357 | · | · | 78,001 Direct | -0.46% | Disposed | (price as of 2026-10-06) |
| March 10, 2025 | CCOI | G | 357 | · | · | 78,358 Direct | -0.45% | Disposed | (price as of 2026-10-06) |
| March 5, 2025 | CCOI | G | 715 | · | · | 78,715 Direct | -0.90% | Disposed | (price as of 2026-10-06) |
| March 5, 2025 | CCOI | G | 715 | · | · | 2,585 Indirect | +38.24% | Acquired | (price as of 2026-10-06) |
| Jan. 9, 2025 | CCOI | A | 9,600 | · | · | 79,430 Direct | +13.75% | Acquired | (price as of 2026-10-06) |
| Dec. 18, 2024 | CCOI | G | 970 | · | · | 69,830 Direct | -1.37% | Disposed | (price as of 2026-10-06) |
| Dec. 18, 2024 | CCOI | G | 485 | · | · | 935 Indirect | +107.78% | Acquired | (price as of 2026-10-06) |
| Dec. 18, 2024 | CCOI | G | 485 | · | · | 935 Indirect | +107.78% | Acquired | (price as of 2026-10-06) |
| Dec. 4, 2024 | CCOI | G | 900 | · | · | 70,800 Direct | -1.26% | Disposed | (price as of 2026-10-06) |
| Dec. 1, 2024 | CCOI | A | 2,400 | · | · | 71,700 Direct | +3.46% | Acquired | (price as of 2026-10-06) |
| Nov. 12, 2024 | CCOI | S | 2,280 | $80.41 | $183,335 | 69,300 Direct | -3.19% | Disposed | -88.4% (price as of 2026-10-06) |
| Sept. 12, 2024 | CCOI | S | 1,400 | $71.67 | $100,338 | 71,580 Direct | -1.92% | Disposed | -87.0% (price as of 2026-10-06) |
| Aug. 23, 2024 | CCOI | S | 2,055 | $74.00 | $152,070 | 72,980 Direct | -2.74% | Disposed | -87.4% (price as of 2026-10-06) |
| Feb. 1, 2024 | CCOI | G | 375 | · | · | 75,035 Direct | -0.50% | Disposed | (price as of 2026-10-06) |
| Feb. 1, 2024 | CCOI | G | 375 | · | · | 375 Indirect | · | Acquired | (price as of 2026-10-06) |
| Jan. 3, 2024 | CCOI | A | 9,600 | · | · | 45,410 Direct | +26.81% | Acquired | (price as of 2026-10-06) |
| Jan. 3, 2024 | CCOI | A | 30,000 | · | · | 75,410 Direct | +66.06% | Acquired | (price as of 2026-10-06) |
| Jan. 3, 2024 | CCOI | A | 9,600 | · | · | 47,910 Direct | +25.06% | Acquired | (price as of 2026-10-06) |
| Jan. 3, 2024 | CCOI | A | 30,000 | · | · | 77,910 Direct | +62.62% | Acquired | (price as of 2026-10-06) |
| Dec. 26, 2023 | CCOI | S 10b5-1 | 3,550 | $76.00 | $269,800 | 38,310 Direct | -8.48% | Disposed | -87.8% (price as of 2026-10-06) |
| Dec. 21, 2023 | CCOI | S 10b5-1 | 1,000 | $74.00 | $74,000 | 41,860 Direct | -2.33% | Disposed | -87.4% (price as of 2026-10-06) |
| Dec. 20, 2023 | CCOI | G | 900 | · | · | 42,860 Direct | -2.06% | Disposed | (price as of 2026-10-06) |
| Dec. 20, 2023 | CCOI | G | 450 | · | · | 450 Indirect | · | Acquired | (price as of 2026-10-06) |
| Dec. 20, 2023 | CCOI | G | 450 | · | · | 450 Indirect | · | Acquired | (price as of 2026-10-06) |
| Dec. 14, 2023 | CCOI | S 10b5-1 | 500 | $72.00 | $36,000 | 43,760 Direct | -1.13% | Disposed | -87.1% (price as of 2026-10-06) |
| Dec. 11, 2023 | CCOI | D | 3,000 | $69.00 | $207,000 | 44,260 Direct | -6.35% | Disposed | -86.5% (price as of 2026-10-06) |
| Dec. 1, 2023 | CCOI | A 10b5-1 | 2,400 | · | · | 47,260 Direct | +5.35% | Acquired | (price as of 2026-10-06) |
| May 3, 2023 | CCOI | S 10b5-1 | 2,500 | $72.00 | $180,000 | 44,860 Direct | -5.28% | Disposed | -87.1% (price as of 2026-10-06) |
| May 3, 2023 | CCOI | S 10b5-1 | 2,500 | $74.00 | $185,000 | 42,360 Direct | -5.57% | Disposed | -87.4% (price as of 2026-10-06) |
| April 17, 2023 | CCOI | S 10b5-1 | 500 | $70.00 | $35,000 | 47,360 Direct | -1.04% | Disposed | -86.7% (price as of 2026-10-06) |
| Feb. 1, 2023 | CCOI | S 10b5-1 | 2,000 | $70.00 | $140,000 | 47,860 Direct | -4.01% | Disposed | -86.7% (price as of 2026-10-06) |
| Jan. 26, 2023 | CCOI | S 10b5-1 | 500 | $68.00 | $34,000 | 49,860 Direct | -0.99% | Disposed | -86.3% (price as of 2026-10-06) |
| Jan. 17, 2023 | CCOI | S 10b5-1 | 1,000 | $66.00 | $66,000 | 50,360 Direct | -1.95% | Disposed | -85.9% (price as of 2026-10-06) |
| Jan. 12, 2023 | CCOI | S 10b5-1 | 1,500 | $64.00 | $96,000 | 51,360 Direct | -2.84% | Disposed | -85.5% (price as of 2026-10-06) |
| Jan. 3, 2023 | CCOI | A | 9,600 | · | · | 52,860 Direct | +22.19% | Acquired | (price as of 2026-10-06) |
| Dec. 1, 2022 | CCOI | A | 2,400 | · | · | 43,260 Direct | +5.87% | Acquired | (price as of 2026-10-06) |
| April 6, 2022 | CCOI | S 10b5-1 | 250 | $72.00 | $18,000 | 40,860 Direct | -0.61% | Disposed | -87.1% (price as of 2026-10-06) |
| April 5, 2022 | CCOI | S 10b5-1 | 250 | $70.00 | $17,500 | 41,110 Direct | -0.60% | Disposed | -86.7% (price as of 2026-10-06) |
| April 1, 2022 | CCOI | S 10b5-1 | 150 | $68.00 | $10,200 | 41,360 Direct | -0.36% | Disposed | -86.3% (price as of 2026-10-06) |
| March 31, 2022 | CCOI | S 10b5-1 | 150 | $66.00 | $9,900 | 41,510 Direct | -0.36% | Disposed | -85.9% (price as of 2026-10-06) |
| March 17, 2022 | CCOI | S 10b5-1 | 600 | $62.96 | $37,776 | 41,660 Direct | -1.42% | Disposed | -85.2% (price as of 2026-10-06) |
| Jan. 3, 2022 | CCOI | A | 9,600 | · | · | 42,260 Direct | +29.39% | Acquired | (price as of 2026-10-06) |
| May 10, 2021 | CCOI | S 10b5-1 | 558 | $80.00 | $44,640 | 32,660 Direct | -1.68% | Disposed | -88.4% (price as of 2026-10-06) |
| April 30, 2021 | CCOI | S 10b5-1 | 558 | $75.00 | $41,850 | 33,218 Direct | -1.65% | Disposed | -87.6% (price as of 2026-10-06) |
| April 5, 2021 | CCOI | S 10b5-1 | 558 | $70.00 | $39,060 | 33,776 Direct | -1.63% | Disposed | -86.7% (price as of 2026-10-06) |
| March 15, 2021 | CCOI | S 10b5-1 | 558 | $65.00 | $36,270 | 34,334 Direct | -1.60% | Disposed | -85.7% (price as of 2026-10-06) |
| Feb. 24, 2021 | CCOI | A | 9,600 | · | · | 34,892 Direct | +37.96% | Acquired | (price as of 2026-10-06) |
| Jan. 4, 2021 | CCOI | S 10b5-1 | 558 | $60.00 | $33,480 | 25,292 Direct | -2.16% | Disposed | -84.5% (price as of 2026-10-06) |
| Sept. 1, 2020 | CCOI | S 10b5-1 | 150 | $67.53 | $10,130 | 25,850 Direct | -0.58% | Disposed | -86.2% (price as of 2026-10-06) |
| July 31, 2020 | CCOI | S 10b5-1 | 500 | $90.00 | $45,000 | 26,000 Direct | -1.89% | Disposed | -89.7% (price as of 2026-10-06) |
| July 21, 2020 | CCOI | S 10b5-1 | 500 | $85.00 | $42,500 | 26,500 Direct | -1.85% | Disposed | -89.0% (price as of 2026-10-06) |
| March 3, 2020 | CCOI | S 10b5-1 | 600 | $81.39 | $48,834 | 27,000 Direct | -2.17% | Disposed | -88.6% (price as of 2026-10-06) |
| March 2, 2020 | CCOI | S 10b5-1 | 300 | $76.66 | $22,998 | 27,600 Direct | -1.08% | Disposed | -87.9% (price as of 2026-10-06) |
| Feb. 14, 2020 | CCOI | A | 9,600 | · | · | 27,900 Direct | +52.46% | Acquired | (price as of 2026-10-06) |
| Jan. 2, 2020 | CCOI | S 10b5-1 | 534 | $65.46 | $34,956 | 18,300 Direct | -2.84% | Disposed | -85.8% (price as of 2026-10-06) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Aug. 7, 2019 | CCOI | common stock | 18,834 | Direct |