Leaving Neutron Holdings, Inc.? Plan your 90-day ISO window
Calculator · free · no signup · pre-IPONeutron Holdings, Inc. is pre-IPO. Left with vested ISOs? Model the 90-day exercise-or-forfeit decision and its AMT cost at any valuation: current 409A or an expected exit price.
Beta · invite-only · AlphaLatitude Inc. · Free Tools
Your grant
Seeded from secondary-market data, as of Aug 9, 2026
Tax inputs
Grant timeline
Recommended exercise quantity
Exercise all 10,000
With 10%/yr expected growth over the 3-yr hold, every share's expected after-tax gain exceeds its marginal AMT cost. Net value: $145,148 at horizon.
Net after-tax value vs. shares exercised
Each point is the expected after-tax NPV at your hold horizon if you exercise that many shares now and let the rest expire.
Year-by-year tax breakdown
You pay the higher of Regular tax and Tentative AMT per jurisdiction, then subtract Credit recovered. The result is Net tax. Hover any number for the bracket-by-bracket breakdown.
| 1 | 10,000 | |||
| 2 | 0 | |||
| 3 | 0 |
Federal AMT credit
Earned
$85,052
Recovered
$29,764
Remaining
$55,288
The AMT credit only recovers in years where regular tax exceeds AMT — typically a year with no ISO exercise. It carries forward indefinitely (Form 8801) and applies in any future tax year where regular tax exceeds AMT.
Estimates only. Excludes disqualifying dispositions, NSOs, multi-state moves, and AMT preferences other than ISO bargain elements. Long-term capital gains tax assumes a qualifying disposition (ISO held ≥1 yr from exercise and ≥2 yr from grant); state LTCG follows ordinary brackets except where the state grants preferential treatment (HI, ND, SC, WI, AR, NM) or has a dedicated LTCG-only tax (WA). Assumes you are within the $100K ISO limit (any portion of an annual ISO grant whose FMV at grant exceeds $100K is treated as NSO from the start, §422(d)). State AMT figures are 2025 (next-year values published in late 2026). Not financial advice.
QSBS note. If your shares qualify (typically pre-IPO C-corp grants held 5+ years), a federal rule lets you exclude up to $10M of gain on a future sale from federal tax. That single rule shifts exercise-timing math more than AMT does. (This is §1202 “qualified small-business stock”.) Modeled in beta, not here.
You solved the exercise window. The beta plans what comes after it: the new shares, your remaining equity, hedges, and taxes in one multi-year plan.
Request beta access →Related calculators: Multi-Year ISO Exercise Schedule Calculator · Stock Concentration Calculator
About Neutron Holdings, Inc.
Neutron Holdings, Inc. is a privately held Cloud/SaaS company, incorporated in Delaware and headquartered in San Francisco, CA. S-1 filed Jun 22, 2026.
Last reported secondary-market price: $37.53 per share (as of 2026-08-09). Your own 409A may differ.
Equity grants at Neutron Holdings, Inc. typically include incentive stock options (ISOs) and non-qualified stock options (NSOs).
Neutron Holdings, Inc., which operates under the Lime brand, was co-founded in 2017 by Brad Bao and Toby Sun in San Francisco. The company runs a shared micromobility platform, renting electric scooters and e-bikes through a mobile app across roughly 230 cities in 29 countries. Revenue reached $886.7 million in 2025, up 29% from the prior year, against a net loss of $59.3 million. Uber is a major investor after leading a $170 million round in 2020. Neutron Holdings filed an S-1 with the SEC in June 2026 to list on Nasdaq as LIME.
Sources: bloomberg.com
Equity comp at Neutron Holdings, Inc.
- Executive RSU awards granted March 2025 carry an explicit liquidity event requirement (satisfied by IPO completion as the second trigger), in addition to time-based vesting. Until the IPO closes, RSUs do not begin to settle regardless of how much time has passed since the grant date.
- Vesting schedule: 1/12th of RSUs vest on each quarterly anniversary of the grant date over three years; some awards cliff vest after one year then vest monthly over the remaining two years.
Sources: sec.gov
Researched 2026-06-27.
OptionsAhoy is an independent tool and is not affiliated with, endorsed by, or sponsored by Neutron Holdings, Inc..
If you are leaving Neutron Holdings, Inc. with vested incentive stock options (ISOs), most stock plans give you 90 days from departure to exercise or forfeit them. The calculator works at any valuation: enter your strike and the current 409A fair market value (FMV) or an expected exit price. It computes your window deadline, the alternative minimum tax (AMT) cost of exercising in full, and the partial-exercise share count that maximizes expected after-tax value.
Example: leaving Neutron Holdings, Inc. with 5,000 vested ISOs at a $11.26 strike, with the last reported price at $37.53, exercising all of them inside the 90-day window puts a $131,350 bargain element into one tax year. Above the 2026 federal AMT exemption ($88,100 single, $137,000 married joint), the 28% AMT rate adds roughly $36,778 on top of regular tax before any state AMT (CA, CO, CT, MN). Exercising fewer shares lowers that bill at the cost of forfeiting the rest; the calculator above finds the count that maximizes expected after-tax value for your exact figures.
All Neutron Holdings, Inc. tools → · Use the generic Post-Termination ISO Exercise Calculator for any company.
Neutron Holdings, Inc. equity questions
- I left Neutron Holdings, Inc.. How long do I have to exercise my ISOs?
- Most stock plans give you 90 days from your departure date to exercise vested incentive stock options (ISOs); unexercised options are forfeited when the window closes. Tax law is slightly wider: ISO treatment requires you to have been an employee within 3 months of exercise (Internal Revenue Code Section 422(a)(2)), so options exercised under an employer-extended window are taxed as non-qualified stock options (NSOs). Check your grant agreement for Neutron Holdings, Inc.'s exact terms. The calculator above computes your deadline from your departure date, the alternative minimum tax (AMT) cost of exercising, and the share count that maximizes after-tax value.
- Does Neutron Holdings, Inc. grant ISOs, NSOs, or RSUs?
- Equity compensation at Neutron Holdings, Inc. typically takes the form of incentive stock options (ISOs) and non-qualified stock options (NSOs). Incentive stock options can trigger the alternative minimum tax (AMT) when you exercise.
- Are Neutron Holdings, Inc. shares eligible for QSBS?
- They might be. Qualified small business stock (QSBS) under Internal Revenue Code Section 1202 can exclude federal tax on much of the gain when shares were acquired at original issuance from a C-corporation while its gross assets were under $50 million, and held at least five years. Whether your Neutron Holdings, Inc. shares qualify turns on when you acquired them and the company's asset size at that time.
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OptionsAhoy plans your Neutron Holdings, Inc. equity alongside hedging, vesting, and de-concentration, across bullish, neutral, and bearish market scenarios. Free during beta.