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 | |
|---|---|---|---|---|---|---|
|
NAPA
6226
CALL
DELISTED
The Duckhorn Portfolio, Inc.
NAPA
| $35K | ﹤0.01% |
12,300
+10,200
| +486% | +$108K |
|
|
CTXRW
6227
CALL
DELISTED
Citius Pharmaceuticals, Inc. Warrant
CTXRW
| $35K | ﹤0.01% |
+8,800
| New | +$35K |
|
|
ACRE
6228
PUT
Ares Commercial Real Estate
ACRE
$236M
| $34K | ﹤0.01% |
5,800
-5,000
| -46% | -$33.7K |
|
6229
CALL
A10 Networks
ATEN
$2.13B
| $34K | ﹤0.01% |
1,900
-28,500
| -94% | -$465K |
|
6230
CALL
Camden Property Trust
CPT
$11B
| $34K | ﹤0.01% |
300
+100
| +50% | +$12K |
|
6231
CALL
Crane NXT
CXT
$2.99B
| $34K | ﹤0.01% |
+600
| New | +$34.5K |
|
6232
PUT
Harmony Biosciences
HRMY
$2.04B
| $34K | ﹤0.01% |
1,000
+400
| +67% | +$13.7K |
|
6233
CALL
Ituran Location and Control
ITRN
$1.09B
| $34K | ﹤0.01% |
1,100
-3,200
| -74% | -$90.9K |
|
6234
PUT
JELD-WEN Holding
JELD
$122M
| $34K | ﹤0.01% |
4,200
-4,000
| -49% | -$48.1K |
|
6235
PUT
Landstar System
LSTR
$5.93B
| $34K | ﹤0.01% |
200
-1,200
| -86% | -$219K |
|
|
MODV
6236
DELISTED
ModivCare
MODV
| $34K | ﹤0.01% |
+2,886
| New | +$45.7K |
|
|
NVEE
6237
DELISTED
NV5 Global
NVEE
| $34K | ﹤0.01% |
1,808
+1,596
| +753% | +$35K |
|
6238
PUT
ONE Gas
OGS
$4.87B
| $34K | ﹤0.01% |
500
-6,300
| -93% | -$460K |
|
|
RDFN
6239
DELISTED
Redfin
RDFN
| $34K | ﹤0.01% |
+4,385
| New | +$42.5K |
|
6240
CALL
Siebert Financial
SIEB
$66.7M
| $34K | ﹤0.01% |
11,000
| – | – |
|
|
SLI
6241
CALL
Standard Lithium
SLI
$502M
| $34K | ﹤0.01% |
+23,300
| New | +$42.8K |
|
6242
CALL
Savers
SVV
$1.58B
| $34K | ﹤0.01% |
+3,400
| New | +$33.8K |
|
6243
PUT
Voya Financial
VOYA
$9.01B
| $34K | ﹤0.01% |
500
-55,600
| -99% | -$4.34M |
|
6244
CALL
Verastem
VSTM
$510M
| $34K | ﹤0.01% |
6,600
+2,400
| +57% | +$9.45K |
|
6245
PUT
Advanced Drainage Systems
WMS
$10.6B
| $34K | ﹤0.01% |
300
-1,400
| -82% | -$194K |
|
|
WOW
6246
PUT
DELISTED
WideOpenWest
WOW
| $34K | ﹤0.01% |
7,000
| – | – |
|
6247
CALL
Zumiez
ZUMZ
$332M
| $34K | ﹤0.01% |
1,800
-600
| -25% | -$12.8K |
|
|
BRDG
6248
DELISTED
Bridge Investment Group
BRDG
| $33K | ﹤0.01% |
+4,031
| New | +$39.6K |
|
6249
DoubleVerify
DV
$1.73B
| $33K | ﹤0.01% |
1,737
-9,273
| -84% | -$175K |
|
6250
CALL
eHealth
EHTH
$42.2M
| $33K | ﹤0.01% |
3,600
+2,900
| +414% | +$16.1K |
|
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.