Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Amplitude, Inc.

AMPL · Nasdaq · CIK 0001866692 · Technology · Software—Application

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

32 Form 4 transaction lines observed in the same window
9 sales · 23 option, withholding, award, gift or other lines

Last qualifying purchase2025-11-07 · Casey Andrew · $299.7K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesModerate
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Skates SpenserCEO and President
○○○○▼○▼○▼○▼
Liu CurtisChief Technology Officer
▼○▼▼○
Crook Nathaniel GlennChief Commercial Officer
○○▼
Schultz EricaDirector
○○○
Casey AndrewChief Financial Officer
○○
Tzuo TienDirector
○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 5 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-11-07 · Casey Andrew.

Recent Form 4 activity

1Purchases
16Sales
41Other Form 4 lines
47SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING9 sale line(s) · context only
OTHER23 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
+9.3%
3M
+63.0%
6M
+112.3%
12M
—

Volatility & liquidity

Volatility
64.8%
Beta
1.50
Avg daily value
USD 27.7M

Valuation

Market cap
USD 1.8B
P/E
—

Fundamentals

Profit margin
-25.8%
ROE
-36.1%
Industry
Software—Application

Market data

Price data up to: 2026-10-03 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2025-12-31 · From Yahoo Finance: Market cap · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
7,143,138
Previous report
6,494,072
Avg daily volume
1,576,711
Days to cover
4.5

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2025-11-07Casey AndrewPurchase (P)Class A Common Stock30,000USD 9.99USD 299,700SEC filing ↗
2025-03-13Casey AndrewPurchase (P)Class A Common Stock21,000USD 11.42USD 239,820SEC filing ↗
2022-02-23SC U.S. Growth IX Management, L.P.; SC U.S. VENTURE 2010 MANAGEMENT, L.P.; SC US (TTGP), LTD.; SEQUOIA CAPITAL U.S. VENTURE 2010-SEED FUND, L.P.; Sequoia Capital U.S. Growth Fund IX, L.P.; Sequoia Capital U.S. Growth IX Principals Fund, L.P.; Sequoia Capital U.S. Growth Partners Fund IX, L.P.Purchase (P)Class A Common Stock186,217USD 20.51USD 3,819,838SEC filing ↗
2022-02-23Grady Patrick WPurchase (P)Class A Common Stock186,217USD 20.51USD 3,819,838SEC filing ↗
2022-02-22SC U.S. Growth IX Management, L.P.; SC U.S. VENTURE 2010 MANAGEMENT, L.P.; SC US (TTGP), LTD.; SEQUOIA CAPITAL U.S. VENTURE 2010-SEED FUND, L.P.; Sequoia Capital U.S. Growth Fund IX, L.P.; Sequoia Capital U.S. Growth IX Principals Fund, L.P.; Sequoia Capital U.S. Growth Partners Fund IX, L.P.Purchase (P)Class A Common Stock552,532USD 20.30USD 11,216,185SEC filing ↗
2022-02-22Grady Patrick WPurchase (P)Class A Common Stock552,532USD 20.30USD 11,216,185SEC filing ↗
2022-02-18SC U.S. Growth IX Management, L.P.; SC U.S. VENTURE 2010 MANAGEMENT, L.P.; SC US (TTGP), LTD.; SEQUOIA CAPITAL U.S. VENTURE 2010-SEED FUND, L.P.; Sequoia Capital U.S. Growth Fund IX, L.P.; Sequoia Capital U.S. Growth IX Principals Fund, L.P.; Sequoia Capital U.S. Growth Partners Fund IX, L.P.Purchase (P)Class A Common Stock1,824,999USD 19.13USD 34,915,313SEC filing ↗
2022-02-18Grady Patrick WPurchase (P)Class A Common Stock1,824,999USD 19.13USD 34,915,313SEC filing ↗

Form 4 evidence

58 transaction lines in the latest 365-day window; 708 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-15Raji Vijaye GaneshAward / grant (A)Class A Common Stock37,851USD 0.00USD 0SEC filing ↗
2026-10-05Tzuo TienAward / grant (A)Class A Common Stock818USD 0.00USD 0SEC filing ↗
2026-10-05Schultz EricaAward / grant (A)Class A Common Stock892USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-15Raji Vijaye GaneshAward / grant (A)Class A Common Stock37,851USD 0.00USD 0SEC filing ↗
2026-10-05Tzuo TienAward / grant (A)Class A Common Stock818USD 0.00USD 0SEC filing ↗
2026-10-05Schultz EricaAward / grant (A)Class A Common Stock892USD 0.00USD 0SEC filing ↗
2026-10-02Skates SpenserSale (S)Class A Common Stock70,087USD 14.52USD 1,017,684SEC filing ↗
2026-10-02Skates SpenserC (C)Class A Common Stock70,087USD 0.00USD 0SEC filing ↗
2026-10-01Skates SpenserSale (S)Class A Common Stock3,539USD 14.45USD 51,139SEC filing ↗
2026-10-01Skates SpenserC (C)Class A Common Stock3,539USD 0.00USD 0SEC filing ↗
2026-09-30Skates SpenserSale (S)Class A Common Stock1,374USD 14.45USD 19,858SEC filing ↗
2026-09-30Skates SpenserC (C)Class A Common Stock1,374USD 0.00USD 0SEC filing ↗
2026-09-10Skates SpenserSale (S)Class A Common Stock185,000USD 12.30USD 2,275,500SEC filing ↗
2026-09-10Skates SpenserC (C)Class A Common Stock185,000USD 0.00USD 0SEC filing ↗
2026-09-04Crook Nathaniel GlennSale (S)Class A Common Stock300,000USD 12.99USD 3,897,000SEC filing ↗
2026-08-17Skates SpenserTax withholding (F)Class A Common Stock52,369USD 13.03USD 682,368SEC filing ↗
2026-08-17Liu CurtisTax withholding (F)Class A Common Stock53,878USD 13.03USD 702,030SEC filing ↗
2026-08-17Crook Nathaniel GlennTax withholding (F)Class A Common Stock109,368USD 13.03USD 1,425,065SEC filing ↗
2026-08-17Casey AndrewTax withholding (F)Class A Common Stock72,814USD 13.03USD 948,766SEC filing ↗
2026-07-05Tzuo TienAward / grant (A)Class A Common Stock1,521USD 0.00USD 0SEC filing ↗
2026-07-05Schultz EricaAward / grant (A)Class A Common Stock1,659USD 0.00USD 0SEC filing ↗
2026-06-12Wong CatherineSale (S)Class A Common Stock7,453USD 6.79USD 50,606SEC filing ↗
2026-06-09Wong CatherineAward / grant (A)Class A Common Stock24,857USD 0.00USD 0SEC filing ↗
2026-06-09Whitehurst James MAward / grant (A)Class A Common Stock24,857USD 0.00USD 0SEC filing ↗
2026-06-09Schultz EricaAward / grant (A)Class A Common Stock24,857USD 0.00USD 0SEC filing ↗
2026-06-09Grady Patrick WAward / grant (A)Class A Common Stock24,857USD 0.00USD 0SEC filing ↗
2026-06-09Gill Ronald SAward / grant (A)Class A Common Stock24,857USD 0.00USD 0SEC filing ↗
2026-06-01Liu CurtisSale (S)Class A Common Stock22,786USD 8.03USD 182,972SEC filing ↗
2026-06-01Liu CurtisSale (S)Class A Common Stock22,201USD 8.03USD 178,274SEC filing ↗
2026-05-15Skates SpenserTax withholding (F)Class A Common Stock39,562USD 6.06USD 239,746SEC filing ↗
2026-05-15Liu CurtisTax withholding (F)Class A Common Stock40,279USD 6.06USD 244,091SEC filing ↗
2026-05-15Crook Nathaniel GlennTax withholding (F)Class A Common Stock101,292USD 6.06USD 613,830SEC filing ↗
2026-05-15Casey AndrewTax withholding (F)Class A Common Stock64,872USD 6.06USD 393,124SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerAMPL
CIK0001866692
SectorTechnology
IndustrySoftware—Application Yahoo Finance
SEC SIC7372 Services-Prepackaged Software
ExchangeNasdaq

Data coverage

Local Form 4 history708 transaction lines from 2021-09-21 to 2026-10-15
50 P purchase lines · 260 S sale lines · 398 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.