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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4801
PUT
ARS Pharmaceuticals
SPRY
$579M
| $147K | ﹤0.01% |
14,000
-11,000
| -44% | -$154K |
|
|
THS
4802
CALL
DELISTED
Treehouse Foods
THS
| $147K | ﹤0.01% |
4,200
+2,700
| +180% | +$98.4K |
|
|
TSSI
4803
CALL
TSS Inc
TSSI
$243M
| $147K | ﹤0.01% |
+12,400
| New | +$120K |
|
4804
PUT
Acuity Brands
AYI
$9.99B
| $146K | ﹤0.01% |
500
-4,300
| -90% | -$1.34M |
|
4805
CALL
Belden
BDC
$3.97B
| $146K | ﹤0.01% |
1,300
| – | – |
|
4806
Beam Therapeutics
BEAM
$2.68B
| $146K | ﹤0.01% |
+5,896
| New | +$150K |
|
|
CGAU
4807
PUT
Centerra Gold
CGAU
$3.33B
| $146K | ﹤0.01% |
25,800
+17,400
| +207% | +$112K |
|
4808
CALL
Energizer
ENR
$1.47B
| $146K | ﹤0.01% |
4,200
+100
| +2% | +$3.46K |
|
4809
PUT
Green Brick Partners
GRBK
$3.09B
| $146K | ﹤0.01% |
2,600
+600
| +30% | +$42.6K |
|
4810
iShares International Developed Real Estate ETF
IFGL
$82.8M
| $146K | ﹤0.01% |
+7,601
| New | +$157K |
|
4811
Lithia Motors
LAD
$9.75B
| $146K | ﹤0.01% |
+410
| New | +$144K |
|
|
ML
4812
PUT
DELISTED
MoneyLion Inc.
ML
| $146K | ﹤0.01% |
1,700
+1,200
| +240% | +$80.9K |
|
4813
Allogene Therapeutics
ALLO
$625M
| $145K | ﹤0.01% |
68,311
+41,181
| +152% | +$102K |
|
4814
Clearway Energy Class C
CWEN
$4.79B
| $145K | ﹤0.01% |
5,581
-819
| -13% | -$22.6K |
|
4815
PUT
Endava
DAVA
$165M
| $145K | ﹤0.01% |
4,700
+2,900
| +161% | +$79.4K |
|
4816
Manhattan Associates
MANH
$11.9B
| $145K | ﹤0.01% |
540
-2,912
| -84% | -$830K |
|
4817
PUT
Sabra Healthcare REIT
SBRA
$5.56B
| $145K | ﹤0.01% |
8,400
+3,500
| +71% | +$63.9K |
|
|
TEF
4818
CALL
DELISTED
Telefonica
TEF
| $145K | ﹤0.01% |
36,100
+2,000
| +6% | +$9.01K |
|
4819
CALL
Telos
TLS
$331M
| $145K | ﹤0.01% |
42,500
-19,500
| -31% | -$69.7K |
|
|
TSLW
4820
DELISTED
Tradr 1.5X Long TSLA Weekly ETF
TSLW
| $145K | ﹤0.01% |
+2,445
| New | +$109K |
|
4821
CALL
Everest Group
EG
$15.6B
| $144K | ﹤0.01% |
400
-8,800
| -96% | -$3.3M |
|
4822
Gartner
IT
$11.1B
| $144K | ﹤0.01% |
298
+254
| +577% | +$131K |
|
|
TBHC
4823
PUT
DELISTED
The Brand House Collective
TBHC
| $144K | ﹤0.01% |
88,900
+76,000
| +589% | +$137K |
|
4824
State Street SPDR Portfolio S&P 600 Small Cap ETF
SPSM
$16.9B
| $144K | ﹤0.01% |
3,216
+2,925
| +1,005% | +$136K |
|
4825
CALL
Turning Point Brands
TPB
$1.48B
| $144K | ﹤0.01% |
2,400
+2,100
| +700% | +$112K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.