Ossiam Portfolio holdings
Ossiam is a Paris-based Natixis Investment Managers affiliate that builds ETFs and funds on rules-based, research-driven strategies. Its range covers index trackers, long-only funds that weight stocks differently from market-cap indexes, and long/short funds aiming to be market-neutral. Four of its ETFs, listed on several European exchanges in 2011, followed equal-weight and minimum-variance strategies, the latter meant to lower risk. Bruno Poulin, who co-founded the firm, is its chief executive.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Vanguard S&P 500 ETF
VOO
|
+$367M |
| 2 |
State Street SPDR Portfolio S&P 500 ETF
SPYM
|
+$353M |
| 3 |
NVIDIA
NVDA
|
+$184M |
| 4 |
Intel
INTC
|
+$173M |
| 5 |
Microsoft
MSFT
|
+$123M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Advanced Micro Devices
AMD
|
+$1.41B |
| 2 |
Broadcom
AVGO
|
+$283M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$156M |
| 4 |
Tesla
TSLA
|
+$129M |
| 5 |
Amazon
AMZN
|
+$100M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 37.02% |
| 2 | Miscellaneous | 18.72% |
| 3 | Financials | 12.19% |
| 4 | Consumer Discretionary | 12.13% |
| 5 | Healthcare | 7.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
126
EXL Service
EXLS
$6.41B
| $8.43M | 0.11% |
+326,000
| New | +$9.6M |
2026 Q2
0 quarters
|
|
127
Block Inc
XYZ
$45.7B
| $8.25M | 0.11% |
+108,594
| New | +$7.63M |
2026 Q2
0 quarters
|
|
128
Monster Beverage
MNST
$92.4B
| $8.25M | 0.11% |
171,608
-2,740
| -2% | -$115K |
2019 Q4
26 quarters
|
|
129
GE Vernova
GEV
$243B
| $8.09M | 0.11% |
6,890
+5,219
| +312% | +$5.33M |
2025 Q2
4 quarters
|
|
130
NCR Atleos
NATL
$3.45B
| $8.07M | 0.11% |
+185,968
| New | +$8.25M |
2026 Q2
0 quarters
|
|
131
Coherent
COHR
$40.9B
| $7.97M | 0.11% |
20,209
+15,802
| +359% | +$5.59M |
2026 Q1
1 quarter
|
|
132
O'Reilly Automotive
ORLY
$72.4B
| $7.97M | 0.11% |
86,562
+70,802
| +449% | +$6.46M |
2020 Q1
25 quarters
|
|
133
Ross Stores
ROST
$73.7B
| $7.76M | 0.1% |
+36,436
| New | +$8.2M |
2026 Q2
0 quarters
|
|
134
American International
AIG
$43.1B
| $7.63M | 0.1% |
102,375
+101,629
| +13,623% | +$7.72M |
2018 Q4
30 quarters
|
|
135
Charter Communications
CHTR
$13B
| $7.62M | 0.1% |
53,570
-1,866
| -3% | -$311K |
2022 Q3
15 quarters
|
|
136
Capital One
COF
$128B
| $7.6M | 0.1% |
37,896
+5,641
| +17% | +$1.08M |
2023 Q1
13 quarters
|
|
137
Alnylam Pharmaceuticals
ALNY
$21.2B
| $7.47M | 0.1% |
24,821
+638
| +3% | +$192K |
2022 Q3
15 quarters
|
|
138
Fiserv Inc
FISV
$31.1B
| $7.42M | 0.1% |
+151,290
| New | +$8.46M |
2026 Q2
0 quarters
|
|
139
Huntington Ingalls Industries
HII
$12.5B
| $7.4M | 0.1% |
+26,441
| New | +$8.84M |
2026 Q2
0 quarters
|
|
140
Yum! Brands
YUM
$43B
| $7.35M | 0.1% |
+45,957
| New | +$7.12M |
2026 Q2
0 quarters
|
|
141
Constellation Energy
CEG
$93.3B
| $7.34M | 0.1% |
29,544
+27,464
| +1,320% | +$7.73M |
2024 Q2
8 quarters
|
|
142
Snap-on
SNA
$18.9B
| $7.32M | 0.1% |
+18,184
| New | +$6.87M |
2026 Q2
0 quarters
|
|
143
Marriott International
MAR
$109B
| $7.3M | 0.1% |
+19,706
| New | +$7.27M |
2026 Q2
0 quarters
|
|
144
Aurora
AUR
$8.63B
| $6.9M | 0.09% |
1,011,156
| – | – |
2025 Q3
3 quarters
|
|
145
Arch Capital
ACGL
$35.7B
| $6.86M | 0.09% |
70,649
+63,782
| +929% | +$6.02M |
2020 Q1
25 quarters
|
|
146
Shake Shack
SHAK
$2.83B
| $6.68M | 0.09% |
+119,227
| New | +$8.98M |
2026 Q2
0 quarters
|
|
147
Pfizer
PFE
$171B
| $6.64M | 0.09% |
+275,753
| New | +$7.21M |
2026 Q2
0 quarters
|
|
148
Regeneron Pharmaceuticals
REGN
$101B
| $6.45M | 0.09% |
10,350
-1,753
| -14% | -$1.19M |
2018 Q4
30 quarters
|
|
149
SEI Investments
SEIC
$12.6B
| $6.41M | 0.09% |
+73,055
| New | +$6.37M |
2026 Q2
0 quarters
|
|
150
Gilead Sciences
GILD
$208B
| $6.26M | 0.08% |
+49,573
| New | +$6.53M |
2026 Q2
0 quarters
|
|
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Ossiam's Q2 2026 Portfolio in Review
As of Q2 2026, Ossiam held 721 positions worth $7.54B, up 33% from $5.69B the previous quarter. Its ten largest holdings account for 45% of the portfolio.
Ossiam's Q2 2026 filing shows 333 new, 144 increased, 172 reduced and 41 closed positions. Its largest new stake was Vanguard S&P 500 ETF: 550,000 shares worth $378M. The largest sale was Advanced Micro Devices, an estimated $1.41B.
By sector, the portfolio is most concentrated in Technology at 37% of assets, down from 43% a quarter earlier, followed by Miscellaneous and Financials.
- Ossiam's largest Q2 2026 buy was Vanguard S&P 500 ETF: 550,000 shares worth $378M.
- Ossiam added most to State Street SPDR Portfolio S&P 500 ETF in Q2 2026, an estimated $353M increase.
- Ossiam's biggest Q2 2026 reduction was Advanced Micro Devices, cutting an estimated $1.41B.
- Ossiam fully exited Roku in Q2 2026, selling an estimated $43.6M.
- Ossiam's ten largest holdings make up 45% of its $7.54B portfolio in Q2 2026.
- Ossiam opened 333 new positions and closed 41 in Q2 2026.
- Ossiam's portfolio value rose 33% quarter-over-quarter to $7.54B.
Based on Ossiam's 13F filing for Q2 2026, filed 13 Aug 2026.