Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
176
PUT
Freeport-McMoran
FCX
$92.9B
| $94.8M | 0.06% |
1,899,300
-707,200
| -27% | -$31.9M |
|
177
PUT
CVS Health
CVS
$138B
| $93.3M | 0.05% |
1,483,900
+267,600
| +22% | +$15.6M |
|
178
PUT
Lam Research
LRCX
$399B
| $92.2M | 0.05% |
1,130,000
+176,000
| +18% | +$15.3M |
|
179
CALL
NextEra Energy
NEE
$187B
| $92M | 0.05% |
1,088,800
+148,800
| +16% | +$11.6M |
|
180
Alibaba
BABA
$279B
| $91.2M | 0.05% |
859,211
+59,965
| +8% | +$4.91M |
|
181
PUT
Mastercard
MA
$470B
| $91.1M | 0.05% |
184,500
-64,700
| -26% | -$30.1M |
|
182
PUT
Occidental Petroleum
OXY
$57.3B
| $91.1M | 0.05% |
1,767,200
+377,400
| +27% | +$21.5M |
|
183
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $90.9M | 0.05% |
1,209,500
-362,700
| -23% | -$28.7M |
|
184
CALL
Spotify
SPOT
$98B
| $88.6M | 0.05% |
240,400
+84,400
| +54% | +$28.1M |
|
185
PUT
Wells Fargo
WFC
$263B
| $88.5M | 0.05% |
1,565,900
-178,600
| -10% | -$10.1M |
|
186
CALL
Coca-Cola
KO
$355B
| $88.2M | 0.05% |
1,227,000
+30,700
| +3% | +$2.1M |
|
187
CALL
Caterpillar
CAT
$412B
| $87.9M | 0.05% |
224,800
-20,800
| -8% | -$7.18M |
|
|
188
CALL
CVS Health
CVS
$138B
| $87.8M | 0.05% |
1,397,000
-333,300
| -19% | -$19.4M |
|
|
189
CALL
Mastercard
MA
$470B
| $87.8M | 0.05% |
177,800
-18,600
| -9% | -$8.65M |
|
190
PUT
Arista Networks
ANET
$221B
| $87.4M | 0.05% |
1,026,400
-839,600
| -45% | -$73.1M |
|
191
PUT
Bristol-Myers Squibb
BMY
$124B
| $87M | 0.05% |
1,682,300
+51,000
| +3% | +$2.39M |
|
192
PUT
Snowflake
SNOW
$92.8B
| $86.7M | 0.05% |
754,500
-96,400
| -11% | -$11.9M |
|
193
CALL
Morgan Stanley
MS
$344B
| $86.4M | 0.05% |
828,500
-8,400
| -1% | -$846K |
|
194
CALL
Applied Materials
AMAT
$444B
| $85.7M | 0.05% |
424,200
+12,400
| +3% | +$2.54M |
|
195
CALL
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $85.2M | 0.05% |
685,700
-5,300
| -0.8% | -$155K |
|
196
CALL
Baidu
BIDU
$36.6B
| $84.9M | 0.05% |
806,200
-32,900
| -4% | -$2.91M |
|
|
197
PUT
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $84.3M | 0.05% |
649,100
+32,700
| +5% | +$954K |
|
198
CALL
AT&T
T
$159B
| $83.7M | 0.05% |
3,802,900
-813,600
| -18% | -$16.2M |
|
199
CALL
First Solar
FSLR
$22.5B
| $83.6M | 0.05% |
335,200
-137,700
| -29% | -$31M |
|
200
CALL
Target
TGT
$62.6B
| $83.6M | 0.05% |
536,300
-67,100
| -11% | -$9.99M |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.