Quanterix CFO exercises RSUs, withholds shares for tax
Quanterix Corp Chief Financial Officer Vandana Sriram reported routine equity compensation activity involving restricted stock units.
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Form Type
4
Rhea-AI Filing Summary
Quanterix Corp Chief Financial Officer Vandana Sriram reported routine equity compensation activity involving restricted stock units. On June 15, 2026, restricted stock units converted into 1,833 shares of common stock, and 548 shares were withheld at $3.10 per share to cover tax obligations.
These transactions reflect RSU vesting and related tax-withholding dispositions, not open-market trades. Following the transactions, Sriram directly owns 31,283 shares of Quanterix common stock. Footnotes state RSUs convert one-for-one into common stock and describe multi-year vesting schedules for prior RSU grants.
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 | $3.10 | $244.90 |
| Exercise | Common Stock | 514 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 154 | $3.10 | $477.40 |
| Exercise | Common Stock | 1,056 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 315 | $3.10 | $976.50 |
Holdings After Transaction:
Restricted Stock Unit — 47,775 contracts (Direct);
Common Stock — 31,283 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
RSU conversions: 1,833 shares
Shares withheld for taxes: 548 shares
Post-transaction holdings: 30,261 shares
+4 more
7 metrics
RSU conversions
1,833 shares
Common stock from RSUs converting on June 15, 2026
Shares withheld for taxes
548 shares
Tax-withholding dispositions at $3.10 per share
Post-transaction holdings
30,261 shares
Quanterix common stock directly owned after transactions
Tax withholding price
$3.10 per share
Price used for F-code tax-withholding dispositions
2023 RSU grant
12,624 units
Granted August 21, 2023 with 25% first-year vesting
2024 RSU grant
24,675 units
Granted February 2, 2024 with staged monthly vesting
2025 RSU grant
50,712 units
Granted February 4, 2025 with 25% cliff then monthly vesting
Key Terms
Restricted stock units, tax-withholding disposition, Exercise or conversion of derivative security, Form 4, +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.
Exercise or conversion of derivative security financial
"Exercise or conversion of derivative security."
Form 4 regulatory
"INSIDER FILING DATA (Form 4):"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
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.
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?
Quanterix CFO Vandana Sriram reported routine equity compensation activity. Restricted stock units vested and converted into common shares, and some shares were withheld to satisfy tax obligations, with no open-market purchases or sales disclosed in these transactions.
What are the CFO’s Quanterix (QTRX) holdings after these transactions?
After the reported transactions, CFO Vandana Sriram directly holds 30,261 shares of Quanterix common stock. This figure reflects the net position after RSU conversions and related share withholding for taxes on the transaction date.
How do Quanterix (QTRX) restricted stock units convert into common stock?
The footnotes state that Quanterix restricted stock units convert into common stock on a one-for-one basis. RSUs from grants in 2023, 2024, and 2025 vest 25% after one year, with the remaining 75% vesting in equal monthly installments thereafter.
Were the Quanterix (QTRX) CFO’s transactions open-market buys or sells?
No open-market buys or sells are shown. The filing reflects RSU conversions coded M and tax-withholding dispositions coded F. These transactions arise from equity compensation and tax obligations rather than discretionary market trading decisions.
AI-generated analysis. How Rhea-AI works. Not financial advice.
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