Compute · Assess & Decide · Analysis & Finance

Compute Founder Vesting Acceleration Payout on Change of Control

A precise breakdown of how many founder shares vest at a change-of-control event under the grant's acceleration terms, so the founder knows their stake before signing.

You receive: A pure function: given total grant, vesting term/cliff, time elapsed at the event, the acceleration type (single/double trigger), the acceleration percentage of remaining unvested shares, and whether the founder is also terminated, it returns sharesVestedBeforeEvent, sharesAcceleratedAtEvent, sharesStillUnvested, and totalVestedAfterEvent.

Part of Choose Business Model

What's verified: STUD verifies the acceleration arithmetic against the grant terms supplied. It does NOT decide whether single- or double-trigger is the right deal, whether the acceleration terms will be accepted by an acquirer or investors, or interpret the actual legal stock agreement; it computes the share counts implied by the parameters the buyer froze.

Opens soon

Cost20 credits

AcceptanceAutomated check against your inputs

ProtectionHeld until verified delivery

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Deliverable interface

The exact vocabulary the automated check enforces: keys, tokens, entry points, and worked examples. Generated from the verification source.

{
 "constants": {},
 "entryName": "compute_vesting_acceleration",
 "expectNote": "expect is the comparison-space value (your return value goes through normalize first when one is published)",
 "hiddenCaseCount": 18,
 "hiddenCaseNames": [
  "cover_single_no",
  "cover_single_yes",
  "cover_double_no",
  "cover_double_yes",
  "cover_precliff",
  "cover_zero_accel",
  "gen0",
  "gen1",
  "gen2",
  "gen3",
  "gen4",
  "gen5",
  "gen6",
  "gen7",
  "gen8",
  "gen9",
  "gen10",
  "gen11"
 ],
 "inputKeys": [
  "accelerationPctOfRemaining",
  "cliffMonths",
  "founderTerminated",
  "monthsElapsedAtEvent",
  "totalGrantShares",
  "triggerType",
  "vestingMonths"
 ],
 "normalizeSource": "def _normalize_founder_vesting_acceleration_payout(r):\n    if not isinstance(r, dict): return r\n    def i(x): return None if x is None else int(round(float(x)))\n    return {\"sharesVestedBeforeEvent\": i(r.get(\"sharesVestedBeforeEvent\")), \"sharesAcceleratedAtEvent\": i(r.get(\"sharesAcceleratedAtEvent\")),\n            \"sharesStillUnvested\": i(r.get(\"sharesStillUnvested\")), \"totalVestedAfterEvent\": i(r.get(\"totalVestedAfterEvent\"))}\n",
 "returnShapes": [
  [
   "sharesAcceleratedAtEvent",
   "sharesStillUnvested",
   "sharesVestedBeforeEvent",
   "totalVestedAfterEvent"
  ]
 ],
 "signature": "def compute_vesting_acceleration(inp):",
 "submission": "python exposing the entry function; inp is one input object; graded on held-out cases",
 "tier": "calculator",
 "visibleCases": [
  {
   "expect": {
    "sharesAcceleratedAtEvent": 250000,
    "sharesStillUnvested": 250000,
    "sharesVestedBeforeEvent": 500000,
    "totalVestedAfterEvent": 750000
   },
   "input": {
    "accelerationPctOfRemaining": 50,
    "cliffMonths": 12,
    "founderTerminated": "no",
    "monthsElapsedAtEvent": 24,
    "totalGrantShares": 1000000,
    "triggerType": "single",
    "vestingMonths": 48
   },
   "name": "single_50pct"
  },
  {
   "expect": {
    "sharesAcceleratedAtEvent": 0,
    "sharesStillUnvested": 500000,
    "sharesVestedBeforeEvent": 500000,
    "totalVestedAfterEvent": 500000
   },
   "input": {
    "accelerationPctOfRemaining": 100,
    "cliffMonths": 12,
    "founderTerminated": "no",
    "monthsElapsedAtEvent": 24,
    "totalGrantShares": 1000000,
    "triggerType": "double",
    "vestingMonths": 48
   },
   "name": "double_notfired"
  },
  {
   "expect": {
    "sharesAcceleratedAtEvent": 500000,
    "sharesStillUnvested": 0,
    "sharesVestedBeforeEvent": 500000,
    "totalVestedAfterEvent": 1000000
   },
   "input": {
    "accelerationPctOfRemaining": 100,
    "cliffMonths": 12,
    "founderTerminated": "yes",
    "monthsElapsedAtEvent": 24,
    "totalGrantShares": 1000000,
    "triggerType": "double",
    "vestingMonths": 48
   },
   "name": "double_fired"
  },
  {
   "expect": {
    "sharesAcceleratedAtEvent": 200000,
    "sharesStillUnvested": 200000,
    "sharesVestedBeforeEvent": 0,
    "totalVestedAfterEvent": 200000
   },
   "input": {
    "accelerationPctOfRemaining": 50,
    "cliffMonths": 12,
    "founderTerminated": "no",
    "monthsElapsedAtEvent": 6,
    "totalGrantShares": 400000,
    "triggerType": "single",
    "vestingMonths": 48
   },
   "name": "precliff_single"
  }
 ],
 "vocabulary": [
  "1",
  "accelerationPctOfRemaining",
  "cliffMonths",
  "double",
  "founderTerminated",
  "monthsElapsedAtEvent",
  "sharesAcceleratedAtEvent",
  "sharesStillUnvested",
  "sharesVestedBeforeEvent",
  "single",
  "totalGrantShares",
  "totalVestedAfterEvent",
  "triggerType",
  "true",
  "vestingMonths",
  "y",
  "yes"
 ]
}

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