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The Vanguard Group filed Amendment No. 8 to a Schedule 13G/A for Tandem Diabetes Care, reporting 0 shares beneficially owned and 0% of the class as of the filing. The filing explains an internal realignment under SEC Release No. 34-39538 that caused certain subsidiaries or business divisions to report separately. The filing lists The Vanguard Group's address as 100 Vanguard Blvd., Malvern, PA and Tandem's principal executive office as 11075 Roselle Street, San Diego, CA. The form is signed by Ashley Grim, Head of Global Fund Administration on 03/27/2026.
Tandem Diabetes Care EVP & Chief Commercial Officer Mark David Novara reported several equity transactions. He exercised 7,414 Restricted Stock Units into the same number of common shares at a $0.00 conversion price, reflecting RSU vesting under the company’s 2023 Long-Term Incentive Plan.
To cover taxes on this vesting, 5,540 shares of common stock were withheld by Tandem Diabetes Care Inc. at $21.59 per share; the footnotes clarify that no shares were sold for this tax-withholding disposition. Novara then executed a separate open‑market sale of 187 common shares at $23.05 per share on the following day.
After these transactions, he directly holds 37,656 shares of common stock. The filing notes that the open‑market sale was carried out under a Rule 10b5‑1 trading plan that Novara adopted on December 4, 2025, indicating the sale was pre‑scheduled rather than a discretionary trade.
Tandem Diabetes Care (TNDM) filing reports a proposed sale of 187 shares of Common Stock tied to Restricted Stock Units with an effective date of 03/15/2026. The filing also records a 10b5-1 sale of 2 shares of Common Stock executed on 03/05/2026 at $45.62.
The broker listed is Morgan Stanley Smith Barney LLC Executive Financial Services, and the reporting individual is Mark Novara. This Form 144 is a routine notice of intended resale and an executed small 10b5-1 disposition.
Tandem Diabetes Care executive Mark David Novara, EVP & Chief Commercial Officer, sold 2 shares of the company’s common stock in an open-market transaction. The sale occurred at a price of $22.81 per share. After this small sale, he directly holds 35,969 shares of Tandem Diabetes Care common stock.
The transaction was executed under a pre-arranged Rule 10b5-1 trading plan that Mr. Novara adopted on December 4, 2025, which is designed to allow insiders to sell shares according to a predetermined schedule.
Tandem Diabetes Care completed a private offering of $300.0 million aggregate principal amount of 0.00% Convertible Senior Notes due 2032. The notes are senior unsecured, pay no regular interest, and mature on March 15, 2032, unless earlier converted, redeemed or repurchased.
Holders can convert under specified stock price and trading conditions before December 15, 2031, and at any time thereafter until shortly before maturity. The initial conversion rate is 27.0362 shares per $1,000 principal amount, implying a conversion price of about $36.99 per share, a premium of roughly 37.5% to the $26.90 share price on February 24, 2026.
Net proceeds were about $290.7 million, with $15.3 million used to purchase capped call transactions that are designed to reduce potential dilution or offset cash payments above principal on conversion. The remaining proceeds are earmarked for general corporate purposes, including possible acquisitions, investments, working capital, operating expenses and capital expenditure.
Tandem Diabetes Care Inc.'s Chief Technology Officer Rick Carpenter reported equity transactions tied to restricted stock units on February 17, 2026. He acquired 1,437 and 897 shares of common stock through exercises of restricted stock units at a price of $0.00 per share.
To cover tax withholding on these vestings, 808 and 504 shares of common stock were disposed of at $18.95 per share. According to the company’s disclosure, these shares were withheld by Tandem Diabetes Care Inc. to satisfy tax obligations and no shares were sold in the open market.
Tandem Diabetes Care executive Elizabeth Anne Gasser reported routine equity compensation activity. On February 17, 2026, she acquired 1,503 and 1,097 shares of common stock upon vesting and conversion of restricted stock units at a stated price of $0.00 per share.
To cover tax withholding on these vestings, 887 and 647 shares of common stock were withheld by the company at $18.95 per share; the footnotes state that no shares were sold in the market. After these transactions, she holds additional common stock indirectly, including 25,949 shares held by The Gasser Family Trust dated September 1, 2011, where she is a co‑trustee.
Tandem Diabetes Care executive Susan Morrison reported routine equity transactions related to restricted stock units. On February 17, 2026, she acquired a total of 2,600 shares of common stock through the exercise and vesting of RSUs, at no cash exercise price.
To cover tax withholding on these vestings, 882 shares of common stock were withheld by the company at $18.95 per share, and the footnotes state that no shares were sold on the market. After these transactions, she directly holds 42,635 shares of common stock.
Tandem Diabetes Care executive Mark David Novara reported equity award activity involving restricted stock units (RSUs) and common shares. On February 17, he exercised 77 RSUs, converting them into 77 shares of common stock at no exercise price under the company’s long-term incentive plan.
Of the resulting shares, 62 common shares were withheld by Tandem Diabetes Care to cover tax withholding obligations upon vesting of the RSUs, as disclosed in the footnotes, and no shares were sold on the open market. After these transactions, Novara directly held 35,971 shares of common stock and 380 RSUs.