Transaction · 0001438133-26-000136

Twomey Christopher J

TWOMEY CHRISTOPHER J, DIR, reported an open-market or private sale at TANDEM DIABETES CARE INC involving 1700.000000 shares for an estimated $32555.00. Reported holdings after the transaction were 24434.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SDIR
TNDMTANDEM DIABETES CARE INC
Trade date
Oct 27, 2026
Filing date
Oct 29, 2026
View on SEC Insider profile
Disclosed value-$32.5kShares × reported price
Shares traded1.70k$19.15 per share
Holdings after24.4kDirect
% of reported position traded6.5%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 26,134 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.

TNDM price since this filing

Daily closing prices, with the filing date and available return windows
TNDM · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago -20.1%1w ago -16.1%1d ago -4.0%
Returns since7d30d90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001438133-26-000136
Common Stock
Transaction date
Oct 27, 2026
Filed Oct 29, 2026, 08:06 PM · 2d delay
Shares
1,700 sh
$19.15 per share
Estimated value
-$32.5k
Computed from shares × price
Holdings after
24,434 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

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

0 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.
  • timely_filing+4 points

    reporting_delay_days = 2

    Filing reported within two business days of the transaction.
  • 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

No officer title

Officer NoDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    Represents shares of common stock received upon exercise of a stock option award.

  2. F2

    The shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 19, 2026.

  3. F3

    The securities are directly owned by Twomey Family Investments, LLC. The Reporting Person is co-manager of Twomey Family Investments, LLC and shares voting and investment power over

  4. these securities held by Twomey Family Investments, LLC and may be deemed to have indirect beneficial ownership of such shares. The Reporting Person disclaims beneficial ownership of such

  5. securities held by Twomey Family Investments, LLC, except to the extent of his proportionate pecuniary interest therein.

  6. F4

    The securities are held by the Chris J. Twomey and Rebecca J. Twomey Family Trust UTD September 20, 2002.

  7. F5

    Awarded on November 15, 2016 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto.

  8. F6

    Such options became exercisable in 12 equal monthly installments beginning on December 15, 2016.

  9. F7

    Such options expire on November 15, 2026.

Original filing · 0001438133-26-000136
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