Stocks › AMBQ
Ambiq Micro, Inc.
AMBQ·NYSE·
United States·USD
United States·USD$61.98
-1.26 (-1.99%)
Close · Oct 7, 2026 · Close Prices from Tiingo.com
AMBQ
Ambiq Micro, Inc. · NYSE
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
AMBQS&P 500 (rebased)
Congress BuyCongress SellInsider BuyInsider SellForm 1448-K ResultsLobbying
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Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
Congressional Trades
Recent trades of AMBQ by members of U.S. Congress · 0 on record
No congressional trades in AMBQ on record.
Whale Activity
Position changes in AMBQ reported for 2026-06-30 by 11 tracked institutional filers
- Increased6
- New3
- Held0
- Decreased0
- Closed0
- No prior filing2
| Filer | Shares | Value | Change |
|---|---|---|---|
| BlackRock, Inc. | 1.4M | $121.9M | increased |
| D. E. Shaw & Co., Inc. | 983.9K | $86.9M | new |
| VANGUARD CAPITAL MANAGEMENT LLC | 768.5K | $67.9M | increased |
| TWO SIGMA INVESTMENTS, LP | 651.8K | $57.6M | increased |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 323.7K | $28.6M | — |
| MILLENNIUM MANAGEMENT LLC | 289.2K | $25.5M | increased |
| RENAISSANCE TECHNOLOGIES LLC | 214.8K | $19.0M | increased |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 169.9K | $15.0M | increased |
| CITADEL ADVISORS LLC | 122.4K | $10.8M | new |
| Point72 Asset Management, L.P. | 77.2K | $6.8M | new |
| ELEMENT CAPITAL MANAGEMENT LLC | 34.3K | $3.0M | — |
KeyVex tracks a curated set of large 13F filers plus the largest positions in recent filings, so this is a sample of institutional activity, not the whole market.
Insider Trading
Net shares bought (+) or sold (−) on the open market by AMBQ insiders, by quarter · Form 4
Recent Insider Transactions
107 transactions on record · newest first
| Insider | Type | Shares | Price | Value | Date | |
|---|---|---|---|---|---|---|
| Chen Sean ChihhsiangPresident and COO | Sale | −800 | $68.08 | $54K | Oct 5, 2026 | Form 4 ↗ |
| Chen Sean ChihhsiangPresident and COO | Sale | −5,508 | $66.38 | $366K | Oct 5, 2026 | Form 4 ↗ |
| Chen Sean ChihhsiangPresident and COO | Sale | −1,797 | $67.29 | $121K | Oct 5, 2026 | Form 4 ↗ |
| Chen Sean ChihhsiangPresident and COO | Sale | −100 | $69.51 | $7K | Oct 5, 2026 | Form 4 ↗ |
| Chen Sean ChihhsiangPresident and COO | Sale | −302 | $71.86 | $22K | Oct 2, 2026 | Form 4 ↗ |
| Chen Sean ChihhsiangPresident and COO | Sale | −3,008 | $69.77 | $210K | Oct 2, 2026 | Form 4 ↗ |
| Chen Sean ChihhsiangPresident and COO | Sale | −2,492 | $69.11 | $172K | Oct 2, 2026 | Form 4 ↗ |
| Esaka FumihideChief Executive Officer · Director | Sale | −862 | $71.86 | $62K | Oct 2, 2026 | Form 4 ↗ |
| Esaka FumihideChief Executive Officer · Director | Sale | −8,585 | $69.77 | $599K | Oct 2, 2026 | Form 4 ↗ |
| Esaka FumihideChief Executive Officer · Director | Sale | −7,113 | $69.11 | $492K | Oct 2, 2026 | Form 4 ↗ |
| Hanson Scott McLeanChief Technology Officer · Director | Sale | −452 | $71.86 | $32K | Oct 2, 2026 | Form 4 ↗ |
| Hanson Scott McLeanChief Technology Officer · Director | Sale | −4,500 | $69.77 | $314K | Oct 2, 2026 | Form 4 ↗ |
| Hanson Scott McLeanChief Technology Officer · Director | Sale | −3,728 | $69.11 | $258K | Oct 2, 2026 | Form 4 ↗ |
| Winzeler Jeffrey GChief Financial Officer | Sale | −284 | $71.86 | $20K | Oct 2, 2026 | Form 4 ↗ |
| Winzeler Jeffrey GChief Financial Officer | Sale | −2,828 | $69.77 | $197K | Oct 2, 2026 | Form 4 ↗ |
| Winzeler Jeffrey GChief Financial Officer | Sale | −2,343 | $69.11 | $162K | Oct 2, 2026 | Form 4 ↗ |
| Hanson Scott McLeanChief Technology Officer · Director | Sale | −4,947 | $60.56 | $300K | Sep 15, 2026 | Form 4 ↗ |
| Hanson Scott McLeanChief Technology Officer · Director | Sale | −1,953 | $59.53 | $116K | Sep 15, 2026 | Form 4 ↗ |
| Hanson Scott McLeanChief Technology Officer · Director | Sale | −100 | $61.00 | $6K | Sep 15, 2026 | Form 4 ↗ |
| Esaka FumihideChief Executive Officer · Director | Sale | −9,615 | $60.55 | $582K | Sep 15, 2026 | Form 4 ↗ |
Fund Holders
Mutual funds and ETFs holding AMBQ · SEC Form N-PORT
| Fund | Shares | Value | % of fund | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS | 643.4K | $56.8M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 ETF iShares Trust | 485.1K | $42.8M | 0.05% | Jun 30, 2026 |
| State Street(R) SPDR(R) S&P(R) Semiconductor ETF SPDR SERIES TRUST | 351.3K | $31.0M | 0.89% | Jun 30, 2026 |
| T. Rowe Price Small-Cap Stock Fund, Inc. | 301.8K | $26.6M | 0.29% | Jun 30, 2026 |
| Needham Aggressive Growth Fund Needham Funds Inc | 279.0K | $24.6M | 0.94% | Jun 30, 2026 |
| AB Small Cap Growth Portfolio AB CAP FUND, INC. | 273.0K | $24.1M | 0.77% | Jun 30, 2026 |
| Templeton Global Smaller Companies Fund | 286.5K | $22.8M | 2.81% | May 31, 2026 |
| T. Rowe Price Small-Cap Value Fund, Inc. | 177.8K | $15.7M | 0.15% | Jun 30, 2026 |
| iShares Russell 2000 Growth ETF iShares Trust | 171.6K | $15.2M | 0.10% | Jun 30, 2026 |
| T. Rowe Price Institutional Small-Cap Stock Fund T. Rowe Price Equity Funds, Inc. | 162.6K | $14.4M | 0.29% | Jun 30, 2026 |
Mutual funds and ETFs whose N-PORT filings list AMBQ's shares (CUSIP 023193105), each fund at its latest report since Mar 8, 2026, largest positions first. Bonds, options and short positions are left out.
Activist & Passive Stakes
Schedule 13D / 13G beneficial-ownership filings
Corporate Lobbying
Estimated quarterly lobbying spending reported under the LDA, filings naming Ambiq Micro, Inc. as client
No lobbying filings found naming Ambiq Micro, Inc. as the client.
Government Contracts
Federal awards to Ambiq Micro, Inc. · USAspending
No federal contract awards found for Ambiq Micro, Inc..
U.S. Patents
Recent USPTO applications naming Ambiq Micro, Inc.
No USPTO patent applications found for Ambiq Micro, Inc..
Annual Financials
From AMBQ's 10-K filings · XBRL
No annual XBRL figures on record for AMBQ. KeyVex's fundamentals cover about 130 large companies so far.
Stock Splits
Every split and reverse split in the price history
No stock splits in AMBQ's price history.
About Ambiq Micro, Inc.
From SEC EDGAR company records
Industry (SIC 3674)Semiconductors & Related Devices
SectorTechnology
HeadquartersAUSTIN, TX
IncorporatedDE
SEC CIK0001500412 ↗