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 | |
|---|---|---|---|---|---|---|
5176
CALL
International General Insurance
IGIC
$1.19B
| $99K | ﹤0.01% |
4,200
+600
| +17% | +$13.7K |
|
5177
Information Services Group
III
$199M
| $99K | ﹤0.01% |
+29,662
| New | +$99.2K |
|
5178
CALL
Monro
MNRO
$383M
| $99K | ﹤0.01% |
4,000
+1,600
| +67% | +$43.8K |
|
5179
CALL
QuickLogic
QUIK
$232M
| $99K | ﹤0.01% |
8,800
+6,800
| +340% | +$55.2K |
|
5180
PUT
SouthState Bank Corp
SSB
$10.2B
| $99K | ﹤0.01% |
1,000
+600
| +150% | +$61.8K |
|
5181
Simpson Manufacturing
SSD
$7.72B
| $99K | ﹤0.01% |
601
-1,862
| -76% | -$341K |
|
5182
CALL
Tarsus Pharmaceuticals
TARS
$2.58B
| $99K | ﹤0.01% |
1,800
-22,900
| -93% | -$1.04M |
|
5183
Tucows
TCX
$172M
| $99K | ﹤0.01% |
5,819
-10,423
| -64% | -$185K |
|
5184
CALL
BJ's Restaurants
BJRI
$1.42B
| $98K | ﹤0.01% |
2,800
-10,900
| -80% | -$386K |
|
5185
PUT
Broadstone Net Lease
BNL
$4.11B
| $98K | ﹤0.01% |
6,200
-900
| -13% | -$15.7K |
|
5186
CALL
Frontdoor
FTDR
$5.1B
| $98K | ﹤0.01% |
1,800
-88,700
| -98% | -$4.81M |
|
|
OBE
5187
CALL
Obsidian Energy
OBE
$716M
| $98K | ﹤0.01% |
17,000
-29,600
| -64% | -$169K |
|
|
TGB
5188
PUT
Trekor Metals
TGB
$2.48B
| $98K | ﹤0.01% |
50,800
-30,900
| -38% | -$68.1K |
|
5189
Atmos Energy
ATO
$28.8B
| $97K | ﹤0.01% |
+697
| New | +$99.1K |
|
5190
Baytex Energy
BTE
$3.25B
| $97K | ﹤0.01% |
37,753
-56,648
| -60% | -$161K |
|
5191
CALL
Itron
ITRI
$4.36B
| $97K | ﹤0.01% |
900
-600
| -40% | -$67K |
|
5192
Plains GP Holdings
PAGP
$5.21B
| $97K | ﹤0.01% |
+5,307
| New | +$98.6K |
|
5193
CALL
Avita Medical
RCEL
$135M
| $97K | ﹤0.01% |
7,600
+3,600
| +90% | +$42.5K |
|
|
RVPH
5194
PUT
DELISTED
REVIVA PHARMA HLDGS INC
RVPH
| $97K | ﹤0.01% |
2,695
+2,610
| +3,071% | +$72.7K |
|
5195
PUT
Teekay
TK
$1.01B
| $97K | ﹤0.01% |
14,100
-14,900
| -51% | -$115K |
|
5196
PUT
Workhorse Group
WKHS
$33.2M
| $97K | ﹤0.01% |
928
+519
| +127% | +$70.9K |
|
5197
CALL
Zentalis Pharmaceuticals
ZNTL
$337M
| $97K | ﹤0.01% |
32,300
-14,500
| -31% | -$47.5K |
|
5198
PUT
Zumiez
ZUMZ
$332M
| $97K | ﹤0.01% |
5,100
+2,900
| +132% | +$61.9K |
|
5199
CALL
AMES National
ATLO
$271M
| $96K | ﹤0.01% |
5,900
+100
| +2% | +$1.73K |
|
5200
Anavex Life Sciences
AVXL
$255M
| $96K | ﹤0.01% |
8,998
+2,242
| +33% | +$17.2K |
|
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.