SEIFERT THOMAS J — SEC Form 4 filings
SEC reporting owner CIK 1473289. 63 Form 4 filings on record with FilingPulse; latest filed 2026-09-15.
Transaction summary — filings shown
Covers the 50 most recent of 63 filings on record, filed 2024-06-06 to 2026-09-15. 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): 215 legs across 39 filings — 832,470 shares, $133,259,836 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 196.
- Largest priced transaction: sale of 53,861 shares @ $300.28 ($16,173,446) in Cloudflare, Inc., filed 2026-08-06.
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 |
|---|---|---|---|---|---|
| Cloudflare, Inc. (NET) | Chief Financial Officer | 48 | — | 215 legs · 832,470 sh · $133,259,836 | 194 |
| WOLFSPEED, INC. (WOLF) | Director | 2 | — | — | 2 |
Form 4 filings — SEIFERT THOMAS J
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-15 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 2,944 @ $327.23 | EDGAR |
| 2026-08-19 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 900 @ $305.25 · Sale (S): 2,944 @ $306.24 · Sale (S): 2,456 @ $307.29 · Sale (S): 3,100 @ $308.23 · Sale (S): 300 @ $309.07 · +5 more | EDGAR |
| 2026-08-18 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 2,944 @ $315.78 | EDGAR |
| 2026-08-06 | 4 | Cloudflare, Inc. (NET) | Option exercise (M): 55,000 @ $44.72 · Sale (S): 53,861 @ $300.28 · Sale (S): 1,139 @ $301 · Option exercise (M): 55,000 (derivative) @ $0 | EDGAR |
| 2026-07-17 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 2,943 @ $281.75 · Conversion (C): 10,000 · Sale (S): 200 @ $266.19 · Sale (S): 100 @ $267.76 · Sale (S): 300 @ $270.50 · Sale (S): 500 @ $274.60 · +9 more | EDGAR |
| 2026-06-17 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 2,944 @ $228.48 · Conversion (C): 10,000 · Sale (S): 900 @ $227.74 · Sale (S): 900 @ $228.91 · Sale (S): 515 @ $229.95 · Sale (S): 685 @ $230.90 · +7 more | EDGAR |
| 2026-05-19 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 9,667 @ $199.81 · Conversion (C): 10,000 · Sale (S): 100 @ $193.28 · Sale (S): 300 @ $195.14 · Sale (S): 400 @ $197.81 · Sale (S): 928 @ $199.05 · +7 more | EDGAR |
| 2026-04-17 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 2,944 @ $178.65 · Conversion (C): 10,000 · Sale (S): 2,076 @ $195.09 · Sale (S): 1,724 @ $196.04 · Sale (S): 1,000 @ $196.97 · Sale (S): 600 @ $198.03 · +6 more | EDGAR |
| 2026-03-17 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 2,943 @ $212.45 · Conversion (C): 10,341 · Sale (S): 200 @ $207.68 · Sale (S): 100 @ $208.64 · Sale (S): 3,041 @ $211.69 · Sale (S): 5,000 @ $212.57 · +4 more | EDGAR |
| 2026-03-13 | 4 | Cloudflare, Inc. (NET) | Grant/award (A): 142,116 @ $0 | EDGAR |
| 2026-02-24 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 8,279 @ $177.18 · Sale (S): 4,700 @ $178.53 · Sale (S): 2,400 @ $179.51 · Sale (S): 1,900 @ $180.68 · Sale (S): 1,500 @ $181.82 · +15 more | EDGAR |
| 2026-02-18 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 20,477 @ $195.85 | EDGAR |
| 2026-01-21 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 928 @ $176.27 · Sale (S): 3,472 @ $177.17 · Sale (S): 1,800 @ $178.08 · Sale (S): 1,200 @ $179.41 · Sale (S): 1,900 @ $180.09 · +5 more | EDGAR |
| 2025-12-23 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 353 @ $198.64 · Sale (S): 1,000 @ $200.58 · Sale (S): 4,836 @ $201.52 · Sale (S): 3,328 @ $202.37 · Sale (S): 483 @ $203.35 · +3 more | EDGAR |
| 2025-11-21 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 2,272 @ $190.31 · Sale (S): 13,331 @ $191.45 · Sale (S): 8,666 @ $192.47 · Sale (S): 2,725 @ $193.50 · Sale (S): 1,900 @ $194.34 · +11 more | EDGAR |
| 2025-11-17 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 20,476 @ $210.60 | EDGAR |
| 2025-10-20 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 500 @ $209.62 · Sale (S): 2,600 @ $210.78 · Sale (S): 2,754 @ $211.71 · Sale (S): 3,846 @ $212.75 · Sale (S): 300 @ $213.40 · +3 more | EDGAR |
| 2025-09-22 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 1,000 @ $223.49 · Sale (S): 600 @ $224.47 · Sale (S): 400 @ $226.22 · Sale (S): 1,800 @ $227.15 · Sale (S): 3,022 @ $228.29 · +5 more | EDGAR |
| 2025-08-21 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 1,600 @ $185.34 · Sale (S): 1,100 @ $186.56 · Sale (S): 2,300 @ $187.84 · Sale (S): 3,549 @ $188.67 · Sale (S): 4,073 @ $189.60 · +8 more | EDGAR |
| 2025-08-19 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 20,478 @ $195.38 | EDGAR |
| 2025-07-29 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 400 · Sale (S): 400 @ $200 · Conversion (C): 400 · Sale (S): 400 @ $200 · Conversion (C): 400 · Sale (S): 400 @ $200 · +19 more | EDGAR |
| 2025-07-22 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 500 @ $196.53 · Sale (S): 6,000 @ $197.87 · Sale (S): 3,300 @ $198.72 · Sale (S): 200 @ $200.16 · Conversion (C): 8,689 · +14 more | EDGAR |
| 2025-06-23 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 4,820 @ $179.43 · Sale (S): 1,436 @ $180.44 · Sale (S): 1,400 @ $181.82 · Sale (S): 1,644 @ $182.75 · Sale (S): 600 @ $183.63 · +4 more | EDGAR |
| 2025-05-22 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 8,965 @ $156.13 · Sale (S): 31,175 @ $156.93 · Sale (S): 1,416 @ $157.62 · Option exercise (M): 10,000 (derivative) @ $0 · Option exercise (M): 10,000 (derivative) @ $0 · +1 more | EDGAR |
| 2025-05-16 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 20,476 @ $154.49 | EDGAR |
| 2025-04-28 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 10,000 @ $120.14 · Option exercise (M): 10,000 (derivative) @ $0 · Option exercise (M): 10,000 (derivative) @ $0 · Conversion (C): 10,000 (derivative) @ $0 | EDGAR |
| 2025-03-21 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 10,000 · Sale (S): 10,000 @ $120 · Option exercise (M): 10,000 (derivative) @ $0 · Option exercise (M): 10,000 (derivative) @ $0 · Conversion (C): 10,000 (derivative) @ $0 | EDGAR |
| 2025-03-06 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 300 @ $138.22 · Sale (S): 2,791 @ $139.47 · Sale (S): 2,770 @ $140.54 · Sale (S): 1,700 @ $141.40 · Sale (S): 5,094 @ $143.15 · +4 more | EDGAR |
| 2025-02-19 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 14,898 @ $171.16 · Conversion (C): 15,000 · Sale (S): 9,674 @ $160.39 · Sale (S): 2,970 @ $161.49 · Sale (S): 6,041 @ $162.42 · Sale (S): 8,450 @ $163.37 · +6 more | EDGAR |
| 2025-02-07 | 4 | Cloudflare, Inc. (NET) | Grant/award (A): 69,246 @ $0 | EDGAR |
| 2025-02-05 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 200 @ $131.78 · Sale (S): 1,427 @ $133.18 · Sale (S): 1,100 @ $134.34 · Sale (S): 1,300 @ $135.61 · Sale (S): 1,548 @ $136.47 · +5 more | EDGAR |
| 2025-02-03 | 4 | WOLFSPEED, INC. (WOLF) | Grant/award (A): 1,642 @ $6.09 | EDGAR |
| 2025-01-21 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 33,864 · Sale (S): 5,530 @ $117.40 · Sale (S): 4,500 @ $118.27 · Sale (S): 4,970 @ $119.18 · Sale (S): 18,864 @ $120.32 · Conversion (C): 31,136 · +7 more | EDGAR |
| 2025-01-06 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 2,759 @ $112.99 · Sale (S): 8,362 @ $113.76 · Sale (S): 3,879 @ $114.49 · Option exercise (M): 15,000 (derivative) @ $0 · Option exercise (M): 15,000 (derivative) @ $0 · +1 more | EDGAR |
| 2024-12-19 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 3,207 @ $109.31 · Sale (S): 1,100 @ $110.17 · Sale (S): 1,200 @ $111.47 · Sale (S): 1,349 @ $112.43 · Sale (S): 800 @ $113.19 · +7 more | EDGAR |
| 2024-12-09 | 4 | WOLFSPEED, INC. (WOLF) | Grant/award (A): 18,834 @ $0 | EDGAR |
| 2024-12-05 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 678 @ $107.68 · Sale (S): 756 @ $109.01 · Sale (S): 11,000 @ $109.92 · Sale (S): 2,566 @ $110.64 · Option exercise (M): 15,000 (derivative) @ $0 · +2 more | EDGAR |
| 2024-11-19 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 14,899 @ $89.77 · Conversion (C): 15,000 · Sale (S): 700 @ $91.79 · Sale (S): 3,200 @ $93.42 · Sale (S): 8,018 @ $94.21 · Sale (S): 5,962 @ $95.35 · +4 more | EDGAR |
| 2024-11-04 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 8,618 @ $86.55 · Sale (S): 6,382 @ $87.11 · Option exercise (M): 15,000 (derivative) @ $0 · Option exercise (M): 15,000 (derivative) @ $0 · Conversion (C): 15,000 (derivative) @ $0 | EDGAR |
| 2024-10-21 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 13,358 @ $90.83 · Sale (S): 1,642 @ $91.25 · Option exercise (M): 15,000 (derivative) @ $0 · Option exercise (M): 15,000 (derivative) @ $0 · Conversion (C): 15,000 (derivative) @ $0 | EDGAR |
| 2024-10-04 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 5,932 @ $78.77 · Sale (S): 9,068 @ $79.47 · Option exercise (M): 15,000 (derivative) @ $0 · Option exercise (M): 15,000 (derivative) @ $0 · Conversion (C): 15,000 (derivative) @ $0 | EDGAR |
| 2024-09-19 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 12,900 @ $78.24 · Sale (S): 2,100 @ $79.11 · Option exercise (M): 15,000 (derivative) @ $0 · Option exercise (M): 15,000 (derivative) @ $0 · Conversion (C): 15,000 (derivative) @ $0 | EDGAR |
| 2024-09-05 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 3,931 @ $77.45 · Sale (S): 8,769 @ $78.05 · Sale (S): 2,300 @ $79.10 · Option exercise (M): 15,000 (derivative) @ $0 · Option exercise (M): 15,000 (derivative) @ $0 · +1 more | EDGAR |
| 2024-08-22 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 24,406 @ $82.64 · Sale (S): 2,830 @ $83.74 · Sale (S): 1,400 @ $84.44 · Option exercise (M): 15,000 (derivative) @ $0 · Option exercise (M): 15,000 (derivative) @ $0 · +1 more | EDGAR |
| 2024-08-16 | 4 | Cloudflare, Inc. (NET) | Tax withholding (F): 14,898 @ $82.16 | EDGAR |
| 2024-08-05 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 600 @ $76.08 · Sale (S): 1,803 @ $77.14 · Sale (S): 3,800 @ $78.18 · Sale (S): 6,397 @ $79.20 · Sale (S): 2,400 @ $80.10 · +3 more | EDGAR |
| 2024-07-19 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 8,734 @ $78.31 · Sale (S): 3,679 @ $79.08 · Sale (S): 1,787 @ $80.45 · Sale (S): 800 @ $80.90 · Option exercise (M): 15,000 (derivative) @ $0 · +2 more | EDGAR |
| 2024-07-03 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 14,800 @ $84.96 · Sale (S): 200 @ $85.55 · Option exercise (M): 15,000 (derivative) @ $0 · Option exercise (M): 15,000 (derivative) @ $0 · Conversion (C): 15,000 (derivative) @ $0 | EDGAR |
| 2024-06-24 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 9,643 @ $78.05 · Sale (S): 4,950 @ $79.19 · Sale (S): 407 @ $79.66 · Option exercise (M): 15,000 (derivative) @ $0 · Option exercise (M): 15,000 (derivative) @ $0 · +1 more | EDGAR |
| 2024-06-06 | 4 | Cloudflare, Inc. (NET) | Conversion (C): 15,000 · Sale (S): 7,133 @ $68.70 · Sale (S): 7,867 @ $69.50 · Option exercise (M): 15,000 (derivative) @ $0 · Option exercise (M): 15,000 (derivative) @ $0 · Conversion (C): 15,000 (derivative) @ $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.
Need this as JSON?
GET https://api.filingpulse.io/v1/insider-trades?owner_cik=1473289 returns every filing on this page — normalized, with footnotes and derivative legs — and webhooks push new filings to you in seconds. API docs →