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 | |
|---|---|---|---|---|---|---|
2226
Dollar Tree
DLTR
$23.1B
| $2.12M | ﹤0.01% |
30,079
+28,734
| +2,136% | +$2.62M |
|
2227
State Street Communication Services Select Sector SPDR ETF
XLC
$21.9B
| $2.11M | ﹤0.01% |
23,393
+12,185
| +109% | +$1.05M |
|
|
SA
2228
PUT
Seabridge Gold
SA
$2.8B
| $2.11M | ﹤0.01% |
125,900
+44,400
| +54% | +$722K |
|
2229
CALL
UWM Holdings
UWMC
$621M
| $2.11M | ﹤0.01% |
248,100
+129,700
| +110% | +$1.09M |
|
2230
CALL
Zebra Technologies
ZBRA
$12.4B
| $2.11M | ﹤0.01% |
5,700
+4,400
| +338% | +$1.48M |
|
2231
PUT
Canadian Pacific Kansas City
CP
$82B
| $2.1M | ﹤0.01% |
24,600
-19,800
| -45% | -$1.63M |
|
2232
Rapid7
RPD
$634M
| $2.1M | ﹤0.01% |
52,720
+11,806
| +29% | +$444K |
|
2233
CALL
Incyte
INCY
$23.5B
| $2.1M | ﹤0.01% |
31,700
-2,000
| -6% | -$128K |
|
2234
Signet Jewelers
SIG
$3.55B
| $2.1M | ﹤0.01% |
+20,313
| New | +$1.72M |
|
|
JPGE
2235
PUT
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $2.09M | ﹤0.01% |
35,400
+900
| +3% | +$53.2K |
|
2236
PUT
Enovis
ENOV
$1.56B
| $2.09M | ﹤0.01% |
48,600
+48,500
| +48,500% | +$2.16M |
|
2237
PUT
Perrigo
PRGO
$1.4B
| $2.09M | ﹤0.01% |
79,700
+2,300
| +3% | +$63.3K |
|
2238
CALL
Biomea Fusion
BMEA
$90.4M
| $2.09M | ﹤0.01% |
206,900
-79,100
| -28% | -$514K |
|
2239
PUT
AeroVironment
AVAV
$7.57B
| $2.08M | ﹤0.01% |
10,400
-8,600
| -45% | -$1.55M |
|
2240
PUT
Sabre
SABR
$656M
| $2.08M | ﹤0.01% |
567,600
+101,500
| +22% | +$315K |
|
2241
CALL
Ardelyx
ARDX
$1.24B
| $2.08M | ﹤0.01% |
302,200
-26,800
| -8% | -$158K |
|
2242
Sunrun
RUN
$2.37B
| $2.08M | ﹤0.01% |
115,334
-99,740
| -46% | -$1.77M |
|
2243
PUT
SoundHound AI
SOUN
$2.68B
| $2.08M | ﹤0.01% |
445,900
-239,200
| -35% | -$1.16M |
|
2244
PUT
Beazer Homes USA
BZH
$907M
| $2.07M | ﹤0.01% |
60,700
+3,700
| +6% | +$114K |
|
2245
PUT
Trupanion
TRUP
$1.05B
| $2.07M | ﹤0.01% |
49,400
-1,100
| -2% | -$42.9K |
|
2246
PUT
Targa Resources
TRGP
$60.4B
| $2.07M | ﹤0.01% |
14,000
-12,300
| -47% | -$1.73M |
|
2247
CALL
New Fortress Energy
NFE
$101M
| $2.07M | ﹤0.01% |
227,900
+135,600
| +147% | +$2.09M |
|
2248
PUT
Inspire Medical Systems
INSP
$1.42B
| $2.07M | ﹤0.01% |
9,800
-7,500
| -43% | -$1.3M |
|
2249
CALL
PVH
PVH
$3.71B
| $2.07M | ﹤0.01% |
20,500
-35,500
| -63% | -$3.53M |
|
2250
CALL
Celanese
CE
$5.09B
| $2.07M | ﹤0.01% |
15,200
+8,800
| +138% | +$1.16M |
|
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.