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 | |
|---|---|---|---|---|---|---|
2101
CALL
Pilgrim's Pride
PPC
$6.82B
| $2.21M | ﹤0.01% |
48,700
+4,700
| +11% | +$229K |
|
2102
CALL
Semtech
SMTC
$11.7B
| $2.21M | ﹤0.01% |
35,700
-110,700
| -76% | -$5.84M |
|
2103
PUT
Carpenter Technology
CRS
$30B
| $2.21M | ﹤0.01% |
13,000
-58,500
| -82% | -$10M |
|
|
WCN
2104
Waste Connections
WCN
$42.8B
| $2.2M | ﹤0.01% |
12,837
+12,736
| +12,610% | +$2.31M |
|
2105
PUT
Blue Owl Capital
OWL
$6.39B
| $2.2M | ﹤0.01% |
94,600
-51,800
| -35% | -$1.19M |
|
2106
CALL
Stanley Black & Decker
SWK
$14.2B
| $2.2M | ﹤0.01% |
27,400
-7,900
| -22% | -$733K |
|
2107
PUT
PagerDuty
PD
$700M
| $2.2M | ﹤0.01% |
120,400
+66,000
| +121% | +$1.27M |
|
2108
Invesco
IVZ
$13.3B
| $2.2M | ﹤0.01% |
125,734
-37,901
| -23% | -$675K |
|
2109
CALL
Natural Gas Services Group
NGS
$470M
| $2.2M | ﹤0.01% |
82,000
+81,500
| +16,300% | +$1.91M |
|
|
TEM
2110
PUT
Tempus AI
TEM
$7.69B
| $2.19M | ﹤0.01% |
65,000
+44,800
| +222% | +$2.22M |
|
2111
CALL
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $2.19M | ﹤0.01% |
102,800
+80,100
| +353% | +$2.23M |
|
2112
PUT
Scholar Rock
SRRK
$5.71B
| $2.19M | ﹤0.01% |
50,600
+44,300
| +703% | +$1.44M |
|
2113
Trip.com Group
TCOM
$27.5B
| $2.19M | ﹤0.01% |
31,835
+2,576
| +9% | +$170K |
|
2114
PUT
Eldorado Gold
EGO
$8.31B
| $2.18M | ﹤0.01% |
146,800
+38,700
| +36% | +$639K |
|
2115
Pentair
PNR
$10.2B
| $2.18M | ﹤0.01% |
21,666
+3,228
| +18% | +$331K |
|
|
EDR
2116
PUT
DELISTED
Endeavor Group Holdings, Inc.
EDR
| $2.18M | ﹤0.01% |
69,600
+67,100
| +2,684% | +$2M |
|
2117
CALL
Louisiana-Pacific
LPX
$5.2B
| $2.17M | ﹤0.01% |
21,000
-8,700
| -29% | -$946K |
|
2118
Mobileye
MBLY
$2.03B
| $2.17M | ﹤0.01% |
109,083
-98,702
| -48% | -$1.55M |
|
2119
NextNav
NN
$1.7B
| $2.17M | ﹤0.01% |
139,590
-11,888
| -8% | -$158K |
|
2120
Ciena
CIEN
$55.3B
| $2.17M | ﹤0.01% |
25,600
-37,557
| -59% | -$2.7M |
|
2121
PUT
Red Cat Holdings
RCAT
$1.16B
| $2.17M | ﹤0.01% |
168,700
+136,700
| +427% | +$835K |
|
2122
CALL
Rambus
RMBS
$10.4B
| $2.17M | ﹤0.01% |
41,000
-22,900
| -36% | -$1.17M |
|
2123
PUT
Lantheus
LNTH
$6.82B
| $2.16M | ﹤0.01% |
24,200
-26,500
| -52% | -$2.58M |
|
2124
PUT
Cracker Barrel
CBRL
$1.2B
| $2.16M | ﹤0.01% |
40,900
-80,500
| -66% | -$3.98M |
|
2125
PUT
Wabtec
WAB
$51.1B
| $2.16M | ﹤0.01% |
11,400
-7,200
| -39% | -$1.39M |
|
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.