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 | |
|---|---|---|---|---|---|---|
2201
PUT
BWX Technologies
BWXT
$16B
| $1.98M | ﹤0.01% |
17,800
+16,700
| +1,518% | +$2.04M |
|
2202
PUT
Perrigo
PRGO
$1.4B
| $1.98M | ﹤0.01% |
77,100
-2,600
| -3% | -$68.3K |
|
2203
Xcel Energy
XEL
$51B
| $1.98M | ﹤0.01% |
29,314
-23,577
| -45% | -$1.58M |
|
2204
Range Resources
RRC
$9.11B
| $1.98M | ﹤0.01% |
+54,999
| New | +$1.82M |
|
2205
PUT
Travelers Companies
TRV
$80.8B
| $1.98M | ﹤0.01% |
8,200
-3,700
| -31% | -$924K |
|
2206
PUT
Campbell Soup
CPB
$6.51B
| $1.97M | ﹤0.01% |
47,100
-19,000
| -29% | -$859K |
|
2207
CALL
Tower Semiconductor
TSEM
$26.4B
| $1.97M | ﹤0.01% |
38,300
-13,800
| -26% | -$646K |
|
2208
CALL
GigaCloud Technology
GCT
$1.35B
| $1.97M | ﹤0.01% |
106,300
-4,200
| -4% | -$97.2K |
|
2209
Newell Brands
NWL
$2.16B
| $1.97M | ﹤0.01% |
+197,554
| New | +$1.79M |
|
|
CYBR
2210
PUT
DELISTED
CyberArk
CYBR
| $1.97M | ﹤0.01% |
5,900
-26,100
| -82% | -$7.93M |
|
2211
Alamos Gold
AGI
$12.4B
| $1.96M | ﹤0.01% |
+106,095
| New | +$2.05M |
|
2212
PUT
Vaxcyte
PCVX
$7.89B
| $1.96M | ﹤0.01% |
23,900
-39,500
| -62% | -$3.92M |
|
2213
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $1.95M | ﹤0.01% |
20,400
-3,100
| -13% | -$305K |
|
2214
CALL
BlackSky Technology
BKSY
$800M
| $1.95M | ﹤0.01% |
180,400
+5,900
| +3% | +$50.5K |
|
2215
PUT
Cal-Maine
CALM
$4.28B
| $1.95M | ﹤0.01% |
18,900
+8,100
| +75% | +$764K |
|
2216
VanEck Junior Gold Miners ETF
GDXJ
$7.06B
| $1.94M | ﹤0.01% |
45,393
-6,439
| -12% | -$312K |
|
2217
Valero Energy
VLO
$89.8B
| $1.94M | ﹤0.01% |
15,798
-70,675
| -82% | -$9.46M |
|
2218
CALL
Cullen/Frost Bankers
CFR
$10.3B
| $1.93M | ﹤0.01% |
14,400
+5,200
| +57% | +$683K |
|
2219
CALL
Vodafone
VOD
$34.9B
| $1.93M | ﹤0.01% |
227,700
-2,100
| -0.9% | -$19.1K |
|
2220
PUT
IES Holdings
IESC
$12.5B
| $1.93M | ﹤0.01% |
9,600
+9,400
| +4,700% | +$2.26M |
|
2221
PUT
Sabre
SABR
$656M
| $1.93M | ﹤0.01% |
528,200
-39,400
| -7% | -$144K |
|
2222
McKesson
MCK
$98.5B
| $1.93M | ﹤0.01% |
+3,381
| New | +$1.89M |
|
2223
CoreCivic
CXW
$3.1B
| $1.92M | ﹤0.01% |
88,457
-26,466
| -23% | -$484K |
|
2224
CALL
Alpha Metallurgical Resources
AMR
$1.82B
| $1.92M | ﹤0.01% |
9,600
-10,600
| -52% | -$2.37M |
|
2225
PUT
DHT Holdings
DHT
$2.97B
| $1.92M | ﹤0.01% |
206,700
+55,900
| +37% | +$574K |
|
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.