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 | |
|---|---|---|---|---|---|---|
|
WW
6626
DELISTED
WW International
WW
| $22K | ﹤0.01% |
+17,502
| New | +$21K |
|
6627
Yext
YEXT
$552M
| $22K | ﹤0.01% |
+3,533
| New | +$25.7K |
|
|
MRX
6628
Marex Group Limited Ordinary Shares
MRX
$4.79B
| $22K | ﹤0.01% |
+706
| New | +$19.8K |
|
|
BCAX
6629
CALL
Bicara Therapeutics
BCAX
$1.68B
| $22K | ﹤0.01% |
+1,300
| New | +$27.1K |
|
6630
CALL
BOK Financial
BOKF
$8.57B
| $21K | ﹤0.01% |
200
-400
| -67% | -$44.7K |
|
6631
Commercial Metals
CMC
$7.56B
| $21K | ﹤0.01% |
+441
| New | +$24.9K |
|
6632
Collegium Pharmaceutical
COLL
$1.13B
| $21K | ﹤0.01% |
+765
| New | +$25.3K |
|
6633
PUT
Dime Commercial Bancshares
DCOM
$1.8B
| $21K | ﹤0.01% |
700
-10,700
| -94% | -$345K |
|
6634
PUT
Dyne Therapeutics
DYN
$4.61B
| $21K | ﹤0.01% |
900
+500
| +125% | +$14.8K |
|
6635
CALL
Fate Therapeutics
FATE
$289M
| $21K | ﹤0.01% |
13,000
+11,900
| +1,082% | +$30K |
|
6636
CALL
Fox Factory Holding Corp
FOXF
$744M
| $21K | ﹤0.01% |
700
-1,800
| -72% | -$62K |
|
6637
CALL
CGI
GIB
$15.2B
| $21K | ﹤0.01% |
200
-3,900
| -95% | -$438K |
|
6638
Hagerty
HGTY
$1.18B
| $21K | ﹤0.01% |
2,240
-1,553
| -41% | -$16.9K |
|
6639
PUT
Independence Realty Trust
IRT
$3.88B
| $21K | ﹤0.01% |
1,100
+100
| +10% | +$2.04K |
|
|
MTLS
6640
CALL
Materialise
MTLS
$374M
| $21K | ﹤0.01% |
3,000
+2,500
| +500% | +$16.5K |
|
|
NSA
6641
DELISTED
National Storage Affiliates Trust
NSA
| $21K | ﹤0.01% |
565
-3,340
| -86% | -$143K |
|
6642
Navigator Holdings
NVGS
$1.37B
| $21K | ﹤0.01% |
1,373
-1,557
| -53% | -$24.5K |
|
6643
Pennant Group
PNTG
$1.39B
| $21K | ﹤0.01% |
+810
| New | +$25.5K |
|
6644
CALL
Outdoor Holding Co
POWW
$246M
| $21K | ﹤0.01% |
19,900
-50,000
| -72% | -$59.5K |
|
6645
PUT
Ring Energy
REI
$322M
| $21K | ﹤0.01% |
15,500
+300
| +2% | +$450 |
|
6646
PUT
Reinsurance Group of America
RGA
$15.6B
| $21K | ﹤0.01% |
100
-200
| -67% | -$43.6K |
|
6647
Regenxbio
RGNX
$654M
| $21K | ﹤0.01% |
2,819
+1,532
| +119% | +$14.4K |
|
6648
VanEck Retail ETF
RTH
$257M
| $21K | ﹤0.01% |
96
-353
| -79% | -$79.4K |
|
6649
PUT
Stem
STEM
$49.2M
| $21K | ﹤0.01% |
1,820
+690
| +61% | +$5.94K |
|
6650
TFS Financial
TFSL
$5.31B
| $21K | ﹤0.01% |
+1,700
| New | +$22.6K |
|
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.