Transaction · 0001473289-26-000029

Seifert Thomas J

SEIFERT THOMAS J, CFO, reported an open-market or private sale at Cloudflare, Inc. involving 1604.000000 shares for an estimated $533330.32. Reported holdings after the transaction were 113102.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SCFO
NETCloudflare, Inc.
Trade date
Sep 17, 2026
Filing date
Sep 21, 2026
View on SEC Insider profile
Estimated value-$533kShares × reported price
Shares traded1.60k$332.50 per share
Holdings after113kDirect
% of reported position traded1.4%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 114,706 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

NET price since this filing

Daily closing prices, with the filing date and available return windows
NET · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago -14.3%1w ago -11.5%1d ago -7.7%
Returns since7d +0.7%30d90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001473289-26-000029
Class A Common Stock
Transaction date
Sep 17, 2026
Filed Sep 21, 2026, 08:50 PM · 4d delay
Shares
1,604 sh
$332.50 per share
Estimated value
-$533k
Computed from shares × price
Holdings after
113,102 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Selling Direct Ownership Repeat Seller 10b5-1 Detected
Filing-only score

-4 points

Compact filing score computed from stored Form 4 facts. Version v1.

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • tenb5_1_detected-10 points

    is_10b5_1 = true

    Stored filing content includes detected 10b5-1 language.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Financial Officer

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    Each share of Class B Common Stock is convertible at any time into Class A Common Stock on a one-to-one basis at the reporting person's election and has no expiration date.

  2. F2

    The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 20, 2025.

  3. F3

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.80 to $328.16, inclusive. The reporting person undertakes to pro…

  4. F4

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.81 to $329.69, inclusive.

  5. F5

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.85 to $330.73, inclusive.

  6. F6

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.09 to $332.07, inclusive.

  7. F7

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.09 to $333.06, inclusive.

  8. F8

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.11 to $334.10, inclusive.

  9. F9

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $334.14 to $335.12, inclusive.

  10. F10

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $335.16 to $335.53, inclusive.

  11. F11

    The shares are held of record by the 2026 Seifert Grantor Retained Annuity Trust dated May 27, 2026, for which the reporting person serves as trustee.

  12. F12

    Shares subject to the option are fully vested and immediately exercisable.

  13. F13

    The shares are held of record by Center Court Partners Ltd., for which the reporting person serves as a partner.

  14. F14

    The shares are held of record by Center Court 2020 Trust 1 dated December 11, 2020, for which the reporting person serves as trustee.

  15. F15

    The shares are held of record by Center Court 2020 Trust 2 dated December 11, 2020, for which the reporting person serves as trustee.

  16. F16

    The shares are held of record by Center Court 2020 Trust 3 dated December 11, 2020, for which the reporting person serves as trustee.

Original filing · 0001473289-26-000029
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