AMBQ
AMBIQ MICRO (AMBQ)
NYSE
$58.60-$0.42 (-0.71%)
Price as of Aug 21, 2026 7:56 PM EDT
  • $1.4B
    Market Cap
  • 53.42%
    1-Year Change
  • Semiconductors
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
MANUFACTURERS LIFE INSURANCE COMPANY, THE
42.67%
10.3M
+10.3M (+100.00%)
Jun 30, 2026
BLACKROCK, INC.
5.72%
1.4M
+367,462 (+26.62%)
Jun 30, 2026
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.
4.17%
1.0M
-261,192 (-25.95%)
Jun 30, 2026
D. E. SHAW & CO., INC.
4.07%
983,916
+983,916 (+100.00%)
Jun 30, 2026
ATREIDES MANAGEMENT, LP
3.63%
877,123
+14,948 (+1.70%)
Jun 30, 2026
STATE STREET CORP
3.57%
861,979
+601,752 (+69.81%)
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
3.18%
768,539
+61,135 (+7.95%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions47.7M (80.09%)
  • Mutual Funds10.7M (17.95%)
  • Insiders1.2M (1.97%)
  • Other0 (0.00%)

Insider Transactions

  • 1.97% (1.2M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 4
    Number of InsiderSelling (last 12 months)
  • $135.7M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Esaka Fumihide
Chief Executive Officer
Exempt
Aug 14, 2026
$0.00
13,500
$0.00
85,507
Hanson Scott McLean
Chief Technology Officer
Exempt
Aug 14, 2026
$0.00
7,000
$0.00
62,279
Esaka Fumihide
Chief Executive Officer
Exempt
Aug 14, 2026
$109,620.00
13,500
$8.12
464,689
Hanson Scott McLean
Chief Technology Officer
Exempt
Aug 14, 2026
$56,840.00
7,000
$8.12
218,226
Esaka Fumihide
Chief Executive Officer
Sell
Aug 14, 2026
$81,132.27
1,282
$63.29
463,407
Hanson Scott McLean
Chief Technology Officer
Sell
Aug 14, 2026
$50,604.96
800
$63.26
217,426
Esaka Fumihide
Chief Executive Officer
Sell
Aug 14, 2026
$690,200.62
10,718
$64.40
452,689
Hanson Scott McLean
Chief Technology Officer
Sell
Aug 14, 2026
$347,792.94
5,400
$64.41
212,026
Esaka Fumihide
Chief Executive Officer
Sell
Aug 14, 2026
$97,893.15
1,500
$65.26
451,189
Hanson Scott McLean
Chief Technology Officer
Sell
Aug 14, 2026
$52,241.04
800
$65.30
211,226
TAUTGES JOSEPH A
Award
Jun 08, 2026
$0.00
4,957
$0.00
53,703
HSIEH Wen Hsuan
Award
Jun 08, 2026
$0.00
4,957
$0.00
4,957
Banks Bernard Bennett
Award
Jun 08, 2026
$0.00
4,957
$0.00
4,957
ZHANG KER
Award
Jun 08, 2026
$0.00
4,957
$0.00
28,766
Connors Michele Kim
General Counsel
Sell
Apr 02, 2026
$17,185.41
660
$26.04
60,705
Connors Michele Kim
General Counsel
Sell
Apr 02, 2026
$4,024.29
151
$26.65
60,554
Chen Sean Chihhsiang
President and COO
Award
Mar 06, 2026
$0.00
64,246
$0.00
120,275
Hanson Scott McLean
Chief Technology Officer
Award
Mar 06, 2026
$0.00
80,308
$0.00
203,126
Winzeler Jeffrey G
Chief Financial Officer
Award
Mar 06, 2026
$0.00
41,728
$0.00
94,395
TAUTGES JOSEPH A
Sell
Jan 26, 2026
$241,800.00
7,800
$31.00
48,746
Hanson Scott McLean
Chief Technology Officer
Sell
Jan 26, 2026
$310,000.00
10,000
$31.00
122,818
Connors Michele Kim
General Counsel
Award
Jan 05, 2026
$0.00
23,759
$0.00
23,759
Connors Michele Kim
General Counsel
Award
Jan 05, 2026
$0.00
5,483
$0.00
29,242
Esaka Fumihide
Chief Executive Officer
Exempt
Oct 07, 2025
$0.00
53,660
$0.00
0
Esaka Fumihide
Chief Executive Officer
Exempt
Oct 07, 2025
$315,520.80
53,660
$5.88
230,573
Esaka Fumihide
Chief Executive Officer
Award
Oct 02, 2025
$0.00
159,907
$0.00
176,913
Hanson Scott McLean
Chief Financial Officer
Award
Oct 02, 2025
$0.00
83,819
$0.00
132,818
KPCB XVI Associates, LLC
Conversion
Jul 31, 2025
$0.00
748,046
$0.00
0
HSIEH Wen Hsuan
Conversion
Jul 31, 2025
$0.00
394,989
$0.00
0
KPCB XVI Associates, LLC
Conversion
Jul 31, 2025
$0.00
98,958
$0.00
0