Quanterix CFO reports RSU vesting, tax share transfers
Quanterix Corp Chief Financial Officer Vandana Sriram reported routine equity compensation activity involving restricted stock units (RSUs).
Rhea-AI Filing Summary
Quanterix Corp Chief Financial Officer Vandana Sriram reported routine equity compensation activity involving restricted stock units (RSUs). On May 15, 2026, RSUs converted into common stock in several tranches, including 1,056, 514, and 263 shares, reflecting scheduled vesting.
To cover tax obligations, the filing shows share dispositions of 315, 154, and 79 shares of common stock at $2.75 per share, characterized as tax-withholding transactions rather than open-market sales. Following these transactions, the CFO directly held 28,897 shares of Quanterix common stock, while additional RSUs remain outstanding and continue to vest over time.
Positive
- None.
Negative
- None.
Insider Trade Summary
1,833 shares exercised/converted
Exercise
9 txns
Insider
Sriram Vandana
Role
Chief Financial Officer
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Restricted Stock Unit | 263 | $0.00 | $0.00 |
| Exercise | Restricted Stock Unit | 514 | $0.00 | $0.00 |
| Exercise | Restricted Stock Unit | 1,056 | $0.00 | $0.00 |
| Exercise | Common Stock | 263 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 79 | $2.75 | $217.25 |
| Exercise | Common Stock | 514 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 154 | $2.75 | $423.50 |
| Exercise | Common Stock | 1,056 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 315 | $2.75 | $866.25 |
Holdings After Transaction:
Restricted Stock Unit — 49,608 contracts (Direct);
Common Stock — 29,998 shares (Direct)
Footnotes (4)
- F1. Restricted stock units convert into common stock on a one-for-one basis.
- F2. On August 21, 2023, the reporting person was granted 12,624 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.
- F3. On February 2, 2024, the reporting person was granted 24,675 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.
- F4. On February 4, 2025, the reporting person was granted 50,712 restricted stock units, vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments on the 15th day of each month thereafter.
Key Figures
Tax-withholding shares: 315 shares
Additional tax-withholding shares: 154 shares
Further tax-withholding shares: 79 shares
+5 more
8 metrics
Tax-withholding shares
315 shares
Common stock disposed at $2.75 on May 15, 2026
Additional tax-withholding shares
154 shares
Common stock disposed at $2.75 on May 15, 2026
Further tax-withholding shares
79 shares
Common stock disposed at $2.75 on May 15, 2026
RSU conversion tranche
1,056 shares
Common stock acquired via RSU conversion on May 15, 2026
RSU conversion tranche
514 shares
Common stock acquired via RSU conversion on May 15, 2026
RSU conversion tranche
263 shares
Common stock acquired via RSU conversion on May 15, 2026
Common shares held after transactions
28,897 shares
Direct ownership after May 15, 2026 transactions
Tax-withholding total
548 shares
Total shares used for tax obligations per summary
Key Terms
Restricted stock units, tax-withholding disposition, derivative security, vesting, +1 more
5 terms
Restricted stock units financial
"Restricted stock units convert into common stock on a one-for-one basis."
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
tax-withholding disposition financial
"Payment of exercise price or tax liability by delivering securities"
A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.
derivative security financial
"Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
vesting financial
"vesting 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
one-for-one basis financial
"Restricted stock units convert into common stock on a one-for-one basis."
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What did Quanterix (QTRX) CFO Vandana Sriram report in this Form 4?
The Form 4 reports routine equity compensation activity for the CFO. Restricted stock units vested and converted into common stock, and some shares were withheld to cover tax liabilities associated with those vestings, rather than being sold in the open market.
Were any of the Quanterix (QTRX) CFO’s transactions open-market sales?
The filing classifies the dispositions as tax-withholding transactions, not open-market sales. Shares totaling 315, 154, and 79 were delivered at $2.75 per share to satisfy tax obligations arising from RSU vesting, rather than representing discretionary stock sales.
What do the Quanterix (QTRX) RSU grants in the footnotes indicate?
The footnotes describe RSU grants on August 21, 2023, February 2, 2024, and February 4, 2025. Each grant vests 25% on the first anniversary of the grant date, with the remaining 75% vesting in 36 equal monthly installments, creating ongoing equity vesting over several years.
AI-generated analysis. How Rhea-AI works. Not financial advice.
