Ambarella Inc (AMBA) Institutional Ownership

Ownership Summary

Ambarella Inc (NASDAQ:AMBA) appears in 316 institutional 13F filings for the quarter ending December 2025.

• Their combined ownership stood at 86.3% of outstanding shares in December 2025, up from 86.2% in September 2025.
• Their total shares held in AMBA increased 4.95% quarter over quarter, and separately, investors owning Ambarella increased 7.12% from a year ago.
• Of these 316 funds, 156 grew their exposure to Ambarella, 115 cut back, and 45 maintained positions.
• The aggregate institutional position in Ambarella amounted to 37.0Mn shares as of December 2025, up by 1.74Mn shares quarter on quarter, and up 1.95Mn shares year over year.
• BlackRock, Inc. is the top holder of Ambarella as of December 31, 2025, with 3.79Mn shares representing 8.84% of outstanding stock.
• The most significant purchases of AMBA for the quarter ending December 2025 came from VANGUARD PORTFOLIO MANAGEMENT LLC (3.72Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.81Mn), MILLENNIUM MANAGEMENT LLC (1.34Mn), PRICE T ROWE ASSOCIATES INC /MD/ (952.32K), FIFTHDELTA Ltd (546.54K).
• Top sellers of AMBA stock for the quarter ending December 2025 included Barclays Plc (679.42K), Squarepoint Ops LLC (333.16K), OBERWEIS ASSET MANAGEMENT INC/ (322.68K), UBS Group AG (321.52K), Point72 Asset Management, L.P. (250.82K).
• Business Quant data shows the 10 biggest positions in Ambarella as of December 2025 are held by BlackRock, Inc. (3.79Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (3.72Mn), State Street Corp (1.98Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.81Mn), MANUFACTURERS LIFE INSURANCE COMPANY, THE (1.59Mn), MILLENNIUM MANAGEMENT LLC (1.51Mn), GEODE CAPITAL MANAGEMENT, LLC (1.03Mn), PRICE T ROWE ASSOCIATES INC /MD/ (952.32K), CITADEL ADVISORS LLC (931.86K), Legal & General Group Plc (926.4K).