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 | |
|---|---|---|---|---|---|---|
5026
CALL
Byrna Technologies
BYRN
$103M
| $118K | ﹤0.01% |
4,100
-700
| -15% | -$13.7K |
|
|
RPC
5027
CALL
Ridgepost Capital
RPC
$941M
| $118K | ﹤0.01% |
9,400
+8,800
| +1,467% | +$107K |
|
5028
CALL
Tronox
TROX
$999M
| $118K | ﹤0.01% |
11,800
-278,400
| -96% | -$3.39M |
|
5029
VinFast Auto
VFS
$7.25B
| $118K | ﹤0.01% |
29,435
-68,386
| -70% | -$277K |
|
5030
Vitesse Energy
VTS
$636M
| $118K | ﹤0.01% |
4,733
+4,680
| +8,830% | +$122K |
|
5031
PUT
Vuzix
VUZI
$194M
| $118K | ﹤0.01% |
30,100
+11,600
| +63% | +$23.8K |
|
|
CMPS
5032
PUT
Compass Pathways
CMPS
$1.56B
| $117K | ﹤0.01% |
31,200
-227,400
| -88% | -$1.15M |
|
5033
Cardiff Oncology
CRDF
$66.2M
| $117K | ﹤0.01% |
27,064
+14,493
| +115% | +$45.3K |
|
5034
KLX Energy Services
KLXE
$44.4M
| $117K | ﹤0.01% |
23,536
-7,477
| -24% | -$38.9K |
|
5035
CALL
Oceaneering
OII
$4.74B
| $117K | ﹤0.01% |
4,500
+2,100
| +88% | +$55.5K |
|
|
SLI
5036
PUT
Standard Lithium
SLI
$505M
| $117K | ﹤0.01% |
80,600
+73,400
| +1,019% | +$135K |
|
5037
CALL
TD Synnex
SNX
$20.2B
| $117K | ﹤0.01% |
1,000
-26,300
| -96% | -$3.15M |
|
5038
Tenable Holdings
TENB
$3.59B
| $117K | ﹤0.01% |
2,996
+2,449
| +448% | +$102K |
|
|
RVNC
5039
DELISTED
Revance Therapeutics, Inc.
RVNC
| $117K | ﹤0.01% |
38,598
+14,220
| +58% | +$61.9K |
|
5040
Keros Therapeutics
KROS
$202M
| $116K | ﹤0.01% |
+7,387
| New | +$384K |
|
5041
CALL
Dorian LPG
LPG
$1.98B
| $116K | ﹤0.01% |
4,800
-45,200
| -90% | -$1.26M |
|
5042
CALL
ReNew
RNW
$2.25B
| $116K | ﹤0.01% |
17,100
-17,600
| -51% | -$107K |
|
5043
CALL
SPX Corp
SPXC
$9.98B
| $116K | ﹤0.01% |
+800
| New | +$129K |
|
5044
PUT
Simpson Manufacturing
SSD
$7.68B
| $116K | ﹤0.01% |
700
-5,200
| -88% | -$952K |
|
5045
PUT
Telesat
TSAT
$570M
| $116K | ﹤0.01% |
7,100
+1,700
| +31% | +$23.6K |
|
5046
CALL
Arq
ARQ
$88.4M
| $116K | ﹤0.01% |
15,400
-15,200
| -50% | -$100K |
|
5047
CALL
Alta Equipment Group
ALTG
$197M
| $115K | ﹤0.01% |
17,700
-1,100
| -6% | -$7.67K |
|
5048
CALL
Annexon
ANNX
$863M
| $115K | ﹤0.01% |
22,500
-7,500
| -25% | -$46.1K |
|
5049
Appian
APPN
$1.94B
| $115K | ﹤0.01% |
3,517
+2,322
| +194% | +$83K |
|
5050
Charter Communications
CHTR
$16.9B
| $115K | ﹤0.01% |
338
-5,432
| -94% | -$1.96M |
|
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.