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SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•71 filings

TNDM

TANDEM DIABETES CARE INC

Net sales of $32.6K over the last 3 months

1 seller account for the net balance. There is no cluster of three distinct buyers within 30 days. We found no CEO/CFO purchases over 12 months.

How to read this signal

Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.

JSON example

3-month balance

−$32,555

0 buyers · 1 sellers

12-month purchases

$0.00

0 distinct insiders

12-month sales

$36,911

2 distinct insiders

Highlighted alerts

2

3 Rule 10b5-1 trades treated as informational

Buying cluster · 30 days

Fewer than three distinct buyers

CEO/CFO purchases · 12 months

No executive purchases found

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Form 4 raw → Raspberry

The value is in what we do not call a signal.

The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.

100
Raw transactions
Everything returned by the filing
5
Voluntary view
P/S trades after deterministic checks
99
Administrative noise
Stored, never alerted
3
10b5-1
Shown as informational
SEC ownership XML facts
Code
M
Shares
1,700
Price
$19.00
Footnotes
7

Represents shares of common stock received upon exercise of a stock option award. The shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 19, 2026. 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 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 securities held by Twomey Family Investments, LLC, except to the extent of his proportionate pecuniary interest therein. The securities are held by the Chris J. Twomey and Rebecca J. Twomey Family Trust UTD September 20, 2002. Awarded on November 15, 2016 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto. Such options became exercisable in 12 equal monthly installments beginning on December 15, 2016. Such options expire on November 15, 2026.

Raspberry interpretation
Informational — no alert

Reason: administrative_code. The trade is reported under a Rule 10b5-1 plan.

Verify in SEC EDGAR

Recent transactions

Voluntary purchases and sales; administrative noise stays hidden.

5 transactions

TWOMEY CHRISTOPHER J

Director

Sale 10b5-1
Shares
1,700
Price
$19.15
Value
$32,555
Open SEC filing

Novara Mark David

EVP & CHIEF COMMERCIAL OFFICER

Sale 10b5-1
Shares
187
Price
$23.05
Value
$4,310
Open SEC filing

Novara Mark David

EVP & CHIEF COMMERCIAL OFFICER

Sale 10b5-1
Shares
2
Price
$22.81
Value
$45.62
Open SEC filing

Sheridan John F

PRESIDENT & CEO

PurchaseAlert
Shares
10,000
Price
$10.23
Value
$102,318
Open SEC filing

Vosseller Leigh

EVP & CHIEF FINANCIAL OFFICER

PurchaseAlert
Shares
13,720
Price
$10.89
Value
$149,404
Open SEC filing

“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.