SEIFERT THOMAS J
Chief Financial Officer · 160 insider transactions on file
All transactions
| Date | Ticker | Company | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-07-17 | NET | Cloudflare, Inc. | Sale | 3,299 | $277.68 | $916,056.09 | filing |
| 2026-07-17 | NET | Cloudflare, Inc. | Sale | 1,741 | $276.63 | $481,618.05 | filing |
| 2026-07-17 | NET | Cloudflare, Inc. | Sale | 1,559 | $275.79 | $429,951.31 | filing |
| 2026-07-17 | NET | Cloudflare, Inc. | Sale | 1,201 | $278.76 | $334,785.60 | filing |
| 2026-07-17 | NET | Cloudflare, Inc. | Sale | 800 | $279.91 | $223,928.72 | filing |
| 2026-07-17 | NET | Cloudflare, Inc. | Sale | 500 | $274.60 | $137,302.00 | filing |
| 2026-07-17 | NET | Cloudflare, Inc. | Sale | 300 | $281.29 | $84,387.99 | filing |
| 2026-07-17 | NET | Cloudflare, Inc. | Sale | 300 | $270.50 | $81,150.99 | filing |
| 2026-07-17 | NET | Cloudflare, Inc. | Sale | 200 | $266.19 | $53,238.00 | filing |
| 2026-07-17 | NET | Cloudflare, Inc. | Sale | 100 | $267.76 | $26,776.00 | filing |
| 2026-07-17 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2026-07-15 | NET | Cloudflare, Inc. | Tax withholding | 2,943 | $281.75 | $829,190.25 | filing |
| 2026-06-17 | NET | Cloudflare, Inc. | Sale | 3,167 | $233.44 | $739,308.60 | filing |
| 2026-06-17 | NET | Cloudflare, Inc. | Sale | 2,633 | $234.18 | $616,599.63 | filing |
| 2026-06-17 | NET | Cloudflare, Inc. | Sale | 900 | $228.91 | $206,020.98 | filing |
| 2026-06-17 | NET | Cloudflare, Inc. | Sale | 900 | $227.74 | $204,963.21 | filing |
| 2026-06-17 | NET | Cloudflare, Inc. | Sale | 685 | $230.90 | $158,164.92 | filing |
| 2026-06-17 | NET | Cloudflare, Inc. | Sale | 600 | $235.34 | $141,202.86 | filing |
| 2026-06-17 | NET | Cloudflare, Inc. | Sale | 600 | $232.00 | $139,201.02 | filing |
| 2026-06-17 | NET | Cloudflare, Inc. | Sale | 515 | $229.95 | $118,426.00 | filing |
| 2026-06-17 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2026-06-15 | NET | Cloudflare, Inc. | Tax withholding | 2,944 | $228.48 | $672,645.12 | filing |
| 2026-05-18 | NET | Cloudflare, Inc. | Sale | 3,570 | $201.21 | $718,310.78 | filing |
| 2026-05-18 | NET | Cloudflare, Inc. | Sale | 2,432 | $200.20 | $486,894.91 | filing |
| 2026-05-18 | NET | Cloudflare, Inc. | Sale | 2,000 | $202.17 | $404,333.40 | filing |
| 2026-05-18 | NET | Cloudflare, Inc. | Sale | 928 | $199.05 | $184,721.65 | filing |
| 2026-05-18 | NET | Cloudflare, Inc. | Sale | 400 | $197.81 | $79,123.48 | filing |
| 2026-05-18 | NET | Cloudflare, Inc. | Sale | 300 | $195.14 | $58,541.01 | filing |
| 2026-05-18 | NET | Cloudflare, Inc. | Sale | 270 | $203.02 | $54,814.29 | filing |
| 2026-05-18 | NET | Cloudflare, Inc. | Sale | 100 | $193.28 | $19,328.00 | filing |
| 2026-05-18 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2026-05-15 | NET | Cloudflare, Inc. | Tax withholding | 9,667 | $199.81 | $1.9M | filing |
| 2026-04-17 | NET | Cloudflare, Inc. | Sale | 2,725 | $200.51 | $546,390.84 | filing |
| 2026-04-17 | NET | Cloudflare, Inc. | Sale | 2,076 | $195.09 | $405,000.61 | filing |
| 2026-04-17 | NET | Cloudflare, Inc. | Sale | 1,724 | $196.04 | $337,968.82 | filing |
| 2026-04-17 | NET | Cloudflare, Inc. | Sale | 1,475 | $199.48 | $294,229.31 | filing |
| 2026-04-17 | NET | Cloudflare, Inc. | Sale | 1,000 | $196.97 | $196,966.60 | filing |
| 2026-04-17 | NET | Cloudflare, Inc. | Sale | 600 | $198.04 | $118,821.00 | filing |
| 2026-04-17 | NET | Cloudflare, Inc. | Sale | 400 | $200.95 | $80,380.00 | filing |
| 2026-04-17 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2026-04-15 | NET | Cloudflare, Inc. | Tax withholding | 2,944 | $178.65 | $525,945.60 | filing |
| 2026-03-17 | NET | Cloudflare, Inc. | Sale | 5,000 | $212.57 | $1.1M | filing |
| 2026-03-17 | NET | Cloudflare, Inc. | Sale | 3,041 | $211.69 | $643,746.25 | filing |
| 2026-03-17 | NET | Cloudflare, Inc. | Sale | 2,000 | $213.23 | $426,464.60 | filing |
| 2026-03-17 | NET | Cloudflare, Inc. | Sale | 200 | $207.68 | $41,536.00 | filing |
| 2026-03-17 | NET | Cloudflare, Inc. | Sale | 100 | $208.64 | $20,864.00 | filing |
| 2026-03-17 | NET | Cloudflare, Inc. | C | 10,341 | — | — | filing |
| 2026-03-15 | NET | Cloudflare, Inc. | Tax withholding | 2,943 | $212.45 | $625,240.35 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 8,133 | $191.13 | $1.6M | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 8,279 | $177.18 | $1.5M | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 4,771 | $192.18 | $916,891.26 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 4,700 | $178.53 | $839,082.07 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 2,766 | $193.12 | $534,179.32 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 2,613 | $190.35 | $497,381.15 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 2,400 | $179.51 | $430,835.04 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 1,900 | $180.68 | $343,291.43 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 1,500 | $181.82 | $272,724.00 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 1,300 | $182.53 | $237,285.36 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 1,000 | $183.78 | $183,778.30 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 700 | $185.09 | $129,563.84 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 500 | $186.10 | $93,048.40 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 395 | $194.05 | $76,648.49 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 300 | $188.77 | $56,631.99 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 200 | $187.39 | $37,477.00 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | Sale | 100 | $195.19 | $19,519.00 | filing |
| 2026-02-20 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2026-02-15 | NET | Cloudflare, Inc. | Tax withholding | 20,477 | $195.85 | $4.0M | filing |
| 2026-02-06 | NET | Cloudflare, Inc. | Award | 142,116 | $0.00 | $0.00 | filing |
| 2026-01-20 | NET | Cloudflare, Inc. | Sale | 3,472 | $177.17 | $615,138.75 | filing |
| 2026-01-20 | NET | Cloudflare, Inc. | Sale | 1,900 | $180.09 | $342,171.19 | filing |
| 2026-01-20 | NET | Cloudflare, Inc. | Sale | 1,800 | $178.08 | $320,537.16 | filing |
| 2026-01-20 | NET | Cloudflare, Inc. | Sale | 1,200 | $179.41 | $215,296.92 | filing |
| 2026-01-20 | NET | Cloudflare, Inc. | Sale | 928 | $176.27 | $163,577.45 | filing |
| 2026-01-20 | NET | Cloudflare, Inc. | Sale | 600 | $181.27 | $108,762.36 | filing |
| 2026-01-20 | NET | Cloudflare, Inc. | Sale | 100 | $181.98 | $18,198.00 | filing |
| 2026-01-20 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2025-12-22 | NET | Cloudflare, Inc. | Sale | 4,836 | $201.52 | $974,542.50 | filing |
| 2025-12-22 | NET | Cloudflare, Inc. | Sale | 3,328 | $202.37 | $673,475.38 | filing |
| 2025-12-22 | NET | Cloudflare, Inc. | Sale | 1,000 | $200.58 | $200,578.20 | filing |
| 2025-12-22 | NET | Cloudflare, Inc. | Sale | 483 | $203.35 | $98,216.55 | filing |
| 2025-12-22 | NET | Cloudflare, Inc. | Sale | 353 | $198.64 | $70,118.58 | filing |
| 2025-12-22 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 13,331 | $191.45 | $2.6M | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 8,666 | $192.47 | $1.7M | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 3,400 | $199.75 | $679,134.70 | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 2,700 | $198.83 | $536,852.61 | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 2,725 | $193.50 | $527,289.14 | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 2,272 | $190.31 | $432,387.27 | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 1,900 | $194.34 | $369,246.00 | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 1,703 | $200.42 | $341,314.75 | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 1,500 | $195.55 | $293,330.85 | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 1,358 | $197.65 | $268,402.59 | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 1,300 | $202.31 | $262,997.02 | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 600 | $196.39 | $117,834.84 | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | Sale | 100 | $202.96 | $20,296.00 | filing |
| 2025-11-20 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2025-11-15 | NET | Cloudflare, Inc. | Tax withholding | 20,476 | $210.60 | $4.3M | filing |
| 2025-10-20 | NET | Cloudflare, Inc. | Sale | 3,846 | $212.75 | $818,232.65 | filing |
| 2025-10-20 | NET | Cloudflare, Inc. | Sale | 2,754 | $211.71 | $583,042.73 | filing |
| 2025-10-20 | NET | Cloudflare, Inc. | Sale | 2,600 | $210.78 | $548,032.16 | filing |
| 2025-10-20 | NET | Cloudflare, Inc. | Sale | 500 | $209.62 | $104,810.10 | filing |
| 2025-10-20 | NET | Cloudflare, Inc. | Sale | 300 | $213.40 | $64,019.01 | filing |
| 2025-10-20 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2025-09-22 | NET | Cloudflare, Inc. | Sale | 3,022 | $228.29 | $689,883.62 | filing |
| 2025-09-22 | NET | Cloudflare, Inc. | Sale | 2,778 | $229.33 | $637,065.13 | filing |
| 2025-09-22 | NET | Cloudflare, Inc. | Sale | 1,800 | $227.15 | $408,863.70 | filing |
| 2025-09-22 | NET | Cloudflare, Inc. | Sale | 1,000 | $223.49 | $223,489.10 | filing |
| 2025-09-22 | NET | Cloudflare, Inc. | Sale | 600 | $224.47 | $134,679.60 | filing |
| 2025-09-22 | NET | Cloudflare, Inc. | Sale | 400 | $229.93 | $91,973.00 | filing |
| 2025-09-22 | NET | Cloudflare, Inc. | Sale | 400 | $226.22 | $90,489.40 | filing |
| 2025-09-22 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2025-08-20 | NET | Cloudflare, Inc. | Sale | 12,762 | $190.59 | $2.4M | filing |
| 2025-08-20 | NET | Cloudflare, Inc. | Sale | 10,711 | $192.71 | $2.1M | filing |
| 2025-08-20 | NET | Cloudflare, Inc. | Sale | 4,073 | $189.60 | $772,258.31 | filing |
| 2025-08-20 | NET | Cloudflare, Inc. | Sale | 4,017 | $191.53 | $769,382.04 | filing |
| 2025-08-20 | NET | Cloudflare, Inc. | Sale | 3,549 | $188.67 | $669,585.57 | filing |
| 2025-08-20 | NET | Cloudflare, Inc. | Sale | 2,300 | $187.84 | $432,023.72 | filing |
| 2025-08-20 | NET | Cloudflare, Inc. | Sale | 1,600 | $185.34 | $296,536.16 | filing |
| 2025-08-20 | NET | Cloudflare, Inc. | Sale | 1,100 | $186.56 | $205,221.28 | filing |
| 2025-08-20 | NET | Cloudflare, Inc. | Sale | 900 | $194.74 | $175,268.97 | filing |
| 2025-08-20 | NET | Cloudflare, Inc. | Sale | 543 | $193.64 | $105,146.14 | filing |
| 2025-08-20 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2025-08-15 | NET | Cloudflare, Inc. | Tax withholding | 20,478 | $195.38 | $4.0M | filing |
| 2025-07-28 | NET | Cloudflare, Inc. | Sale | 36,239 | $200.28 | $7.3M | filing |
| 2025-07-28 | NET | Cloudflare, Inc. | Sale | 6,362 | $200.15 | $1.3M | filing |
| 2025-07-28 | NET | Cloudflare, Inc. | Sale | 6,257 | $200.09 | $1.3M | filing |
| 2025-07-28 | NET | Cloudflare, Inc. | Sale | 5,600 | $200.12 | $1.1M | filing |
| 2025-07-28 | NET | Cloudflare, Inc. | Sale | 4,672 | $201.20 | $939,990.98 | filing |
| 2025-07-28 | NET | Cloudflare, Inc. | C | 40,911 | — | — | filing |
| 2025-07-28 | NET | Cloudflare, Inc. | C | 6,257 | — | — | filing |
| 2025-07-28 | NET | Cloudflare, Inc. | C | 5,600 | — | — | filing |
| 2025-07-28 | NET | Cloudflare, Inc. | C | 6,362 | — | — | filing |
| 2025-07-25 | NET | Cloudflare, Inc. | Sale | 400 | $200.00 | $80,000.00 | filing |
| 2025-07-25 | NET | Cloudflare, Inc. | Sale | 400 | $200.00 | $80,000.00 | filing |
| 2025-07-25 | NET | Cloudflare, Inc. | Sale | 400 | $200.00 | $80,000.00 | filing |
| 2025-07-25 | NET | Cloudflare, Inc. | Sale | 400 | $200.00 | $80,000.00 | filing |
| 2025-07-25 | NET | Cloudflare, Inc. | C | 400 | — | — | filing |
| 2025-07-25 | NET | Cloudflare, Inc. | C | 400 | — | — | filing |
| 2025-07-25 | NET | Cloudflare, Inc. | C | 400 | — | — | filing |
| 2025-07-25 | NET | Cloudflare, Inc. | C | 400 | — | — | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | Sale | 9,000 | $200.16 | $1.8M | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | Sale | 8,689 | $200.18 | $1.7M | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | Sale | 8,343 | $200.18 | $1.7M | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | Sale | 8,238 | $200.18 | $1.6M | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | Sale | 6,000 | $197.87 | $1.2M | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | Sale | 3,300 | $198.72 | $655,773.03 | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | Sale | 500 | $196.53 | $98,267.00 | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | Sale | 200 | $200.16 | $40,032.00 | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | C | 8,689 | — | — | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | C | 8,343 | — | — | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | C | 9,000 | — | — | filing |
| 2025-07-21 | NET | Cloudflare, Inc. | C | 8,238 | — | — | filing |
| 2025-06-20 | NET | Cloudflare, Inc. | Sale | 4,820 | $179.43 | $864,854.05 | filing |
| 2025-06-20 | NET | Cloudflare, Inc. | Sale | 1,644 | $182.75 | $300,443.96 | filing |
| 2025-06-20 | NET | Cloudflare, Inc. | Sale | 1,436 | $180.44 | $259,117.15 | filing |
| 2025-06-20 | NET | Cloudflare, Inc. | Sale | 1,400 | $181.82 | $254,552.76 | filing |
| 2025-06-20 | NET | Cloudflare, Inc. | Sale | 600 | $183.63 | $110,176.02 | filing |
| 2025-06-20 | NET | Cloudflare, Inc. | Sale | 100 | $184.44 | $18,444.00 | filing |
| 2025-06-20 | NET | Cloudflare, Inc. | C | 10,000 | — | — | filing |
Insider transactions from SEC Form 4 filings via EDGAR. Names appear as filed and aren't normalized across issuers.