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Ambarella
AMBA

329 hedge funds and large institutions have $2.93B invested in Ambarella in 2025 Q3 according to their latest regulatory filings, with 66 funds opening new positions, 113 increasing their positions, 105 reducing their positions, and 39 closing their positions.

New
Increased
Maintained
Reduced
Closed

88% more call options, than puts

Call options by funds: $198M | Put options by funds: $105M

69% more first-time investments, than exits

New positions opened: 66 | Existing positions closed: 39

26% more capital invested

Capital invested by funds: $2.32B → $2.93B (+$613M)

8% more funds holding

Funds holding: 304 → 329 (+25)

8% more repeat investments, than reductions

Existing positions increased: 113 | Existing positions reduced: 105

0.47% more ownership

Funds ownership: 82.84% → 83.3% (+0.47%)

67% less funds holding in top 10

Funds holding in top 10: 6 → 2 (-4)

Holders
329
Holders Change
+25
Holders Change %
+8.22%
% of All Funds
4.32%
Holding in Top 10
2
Holding in Top 10 Change
-4
Holding in Top 10 Change %
-66.67%
% of All Funds
0.03%
New
66
Increased
113
Reduced
105
Closed
39
Calls
$198M
Puts
$105M
Net Calls
+$92.6M
Net Calls Change
+$89.4M

Top Buyers

1
UBS Group
UBS Group
Switzerland
+$47.2M
2
Barclays
Barclays
United Kingdom
+$30.9M
3
DCM
Driehaus Capital Management
Illinois
+$27.7M
4
BNP Paribas Financial Markets
BNP Paribas Financial Markets
France
+$15M
5
Arrowstreet Capital
Arrowstreet Capital
Massachusetts
+$14.8M

Top Sellers

1
Manulife (Manufacturers Life Insurance)
Manulife (Manufacturers Life Insurance)
Ontario, Canada
-$37.6M
2
Citadel Advisors
Citadel Advisors
Florida
-$35.6M
3
Axa
Axa
France
-$23.6M
4
Baillie Gifford & Co
Baillie Gifford & Co
United Kingdom
-$17.1M
5
Assenagon Asset Management
Assenagon Asset Management
Luxembourg
-$17M
Name Holding Trade Value Shares
Change 		Change in
Stake
Asset Management One
226
Asset Management One
Japan
$258K -$166K -2,282 -42%
Principal Financial Group
227
Principal Financial Group
Iowa
$257K +$226K +3,119 New
PCM
228
Polymer Capital Management
New York
$248K -$260K -3,578 -54%
Cetera Investment Advisers
229
Cetera Investment Advisers
Illinois
$241K +$212K +2,924 New
PCA
230
Pallas Capital Advisors
Massachusetts
$241K +$212K +2,919 New
FC
231
Farringdon Capital
United Kingdom
$240K +$211K +2,904 New
HFO
232
Heritage Family Offices
Arizona
$237K +$208K +2,870 New
PD
233
Point72 (DIFC)
United Arab Emirates
$236K +$208K +2,866 New
MCG
234
McCollum Christoferson Group
New York
$227K +$200K +2,750 New
First Manhattan
235
First Manhattan
New York
$227K +$199K +2,745 New
WAM
236
Winslow Asset Management
Ohio
$226K -$93.3K -1,285 -32%
GAM
237
Gotham Asset Management
New York
$220K +$194K +2,672 New
TC
238
TradeLink Capital
Illinois
$217K +$191K +2,630 New
Group One Trading
239
Group One Trading
Illinois
$215K +$190K +2,611 New
Two Sigma Advisers
240
Two Sigma Advisers
New York
$215K +$189K +2,600 New
Commonwealth Equity Services
241
Commonwealth Equity Services
Massachusetts
$214K -$233K -3,205 -55%
SIP
242
Stoneridge Investment Partners
Pennsylvania
$212K +$187K +2,569 New
TGIA
243
Torrey Growth & Income Advisors
California
$206K +$182K +2,500 New
WWM
244
Western Wealth Management
Colorado
$206K +$182K +2,500 New
FPAS
245
Focus Partners Advisor Solutions
Missouri
$201K +$160K +2,209 New
Pacer Advisors
246
Pacer Advisors
Pennsylvania
$192K +$113K +1,553 +202%
TRCT
247
Tower Research Capital (TRC)
New York
$181K -$344K -4,733 -68%
Bank Julius Baer & Co
248
Bank Julius Baer & Co
Switzerland
$177K -$654 -9 -0.4%
PAS
249
Point72 Asia (Singapore)
Singapore
$168K +$148K +2,035 New
FFA
250
Farther Finance Advisors
California
$163K +$1.38K +19 +1%
8 9
10
11 12

AMBA Hedge Fund Activity: Q3 2025 in Review

329 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Ambarella (AMBA) for Q3 2025, worth a combined $2.93B — up 26% from $2.32B a quarter earlier.

Buyers outnumbered sellers: 66 funds opened new AMBA positions and 39 closed out — a net gain of 27 holders — while 113 added to existing stakes and 105 trimmed.

The largest buyer was UBS Group, adding an estimated $47.2M. The largest seller was Manulife (Manufacturers Life Insurance), cutting an estimated $37.6M.

  • 329 institutional investors held Ambarella (AMBA) as of Q3 2025, up from 304 in Q2 2025.
  • Funds reported $2.93B of Ambarella stock for Q3 2025, up 26% quarter-over-quarter.
  • 66 funds opened new Ambarella positions in Q3 2025 and 39 closed out, a net change of +27 holders.
  • The largest Ambarella buyer in Q3 2025 was UBS Group, an estimated $47.2M added.
  • The largest Ambarella seller in Q3 2025 was Manulife (Manufacturers Life Insurance), an estimated $37.6M sold.

Based on aggregated 13F filings for Q3 2025.