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 | |
|---|---|---|---|---|---|---|
|
EXK
4101
PUT
Endeavour Silver
EXK
$2.29B
| $288K | ﹤0.01% |
78,900
-9,400
| -11% | -$41.5K |
|
4102
PUT
Inseego
INSG
$111M
| $288K | ﹤0.01% |
28,100
+14,800
| +111% | +$217K |
|
4103
CALL
Prospect Capital
PSEC
$1.12B
| $288K | ﹤0.01% |
66,900
+27,600
| +70% | +$132K |
|
4104
CALL
SEI Investments
SEIC
$12.4B
| $288K | ﹤0.01% |
+3,500
| New | +$275K |
|
4105
CALL
Tyler Technologies
TYL
$13.7B
| $288K | ﹤0.01% |
500
+200
| +67% | +$121K |
|
|
4106
PUT
Tyler Technologies
TYL
$13.7B
| $288K | ﹤0.01% |
+500
| New | +$302K |
|
4107
State Street Real Estate Select Sector SPDR ETF
XLRE
$8.73B
| $288K | ﹤0.01% |
7,090
-78,006
| -92% | -$3.38M |
|
4108
Ezcorp Inc
EZPW
$1.85B
| $287K | ﹤0.01% |
23,488
+18,039
| +331% | +$214K |
|
4109
PUT
NGL Energy Partners
NGL
$1.87B
| $287K | ﹤0.01% |
57,700
+39,200
| +212% | +$175K |
|
4110
Old National Bancorp
ONB
$10.3B
| $287K | ﹤0.01% |
13,243
+1,517
| +13% | +$31.6K |
|
4111
Tennant Co
TNC
$1.5B
| $287K | ﹤0.01% |
3,523
+2,498
| +244% | +$220K |
|
4112
PUT
Full Truck Alliance
YMM
$9.64B
| $287K | ﹤0.01% |
26,600
+14,200
| +115% | +$138K |
|
|
TEN
4113
PUT
Tsakos Energy Navigation Ltd
TEN
$1.18B
| $287K | ﹤0.01% |
16,600
-7,800
| -32% | -$163K |
|
4114
Lemonade
LMND
$4.77B
| $286K | ﹤0.01% |
7,817
-40,675
| -84% | -$1.3M |
|
|
OPTU
4115
PUT
Optimum Communications Inc
OPTU
$298M
| $285K | ﹤0.01% |
118,500
-349,200
| -75% | -$872K |
|
4116
CALL
AvalonBay Communities
AVB
$27.2B
| $285K | ﹤0.01% |
1,300
-4,400
| -77% | -$993K |
|
4117
CALL
Flowers Foods
FLO
$1.6B
| $285K | ﹤0.01% |
13,800
+7,000
| +103% | +$154K |
|
4118
CALL
Silicon Laboratories
SLAB
$7.17B
| $285K | ﹤0.01% |
2,300
-5,800
| -72% | -$665K |
|
4119
Valmont Industries
VMI
$9.33B
| $285K | ﹤0.01% |
932
+381
| +69% | +$123K |
|
4120
Bitwise Bitcoin ETF
BITB
$2.45B
| $284K | ﹤0.01% |
+5,589
| New | +$253K |
|
|
BZUN
4121
PUT
Baozun
BZUN
$168M
| $284K | ﹤0.01% |
104,700
+3,400
| +3% | +$10.3K |
|
4122
eHealth
EHTH
$43.2M
| $284K | ﹤0.01% |
30,216
+29,097
| +2,600% | +$162K |
|
4123
PUT
Innodata
INOD
$1.88B
| $284K | ﹤0.01% |
7,200
-2,400
| -25% | -$75.6K |
|
|
LAZR
4124
DELISTED
Luminar Technologies
LAZR
| $284K | ﹤0.01% |
+52,941
| New | +$559K |
|
4125
Ryanair
RYAAY
$31.1B
| $283K | ﹤0.01% |
+6,498
| New | +$290K |
|
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.