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 | |
|---|---|---|---|---|---|---|
|
VRNA
3776
DELISTED
Verona Pharma
VRNA
| $399K | ﹤0.01% |
8,601
-23,629
| -73% | -$887K |
|
3777
FTAI Infrastructure
FIP
$474M
| $398K | ﹤0.01% |
+54,922
| New | +$471K |
|
3778
CALL
Moelis & Co
MC
$5.1B
| $398K | ﹤0.01% |
5,400
-5,100
| -49% | -$369K |
|
|
NVMI
3779
Nova
NVMI
$13B
| $398K | ﹤0.01% |
+2,024
| New | +$389K |
|
3780
CALL
Paylocity
PCTY
$7.37B
| $398K | ﹤0.01% |
2,000
| – | – |
|
|
VNET
3781
VNET Group
VNET
$1.9B
| $398K | ﹤0.01% |
84,145
-7,077
| -8% | -$26.9K |
|
3782
CALL
Herc Holdings
HRI
$4.89B
| $397K | ﹤0.01% |
2,100
-900
| -30% | -$182K |
|
3783
McEwen Inc
MUX
$1.02B
| $397K | ﹤0.01% |
51,049
-76,872
| -60% | -$695K |
|
3784
Weibo
WB
$1.95B
| $397K | ﹤0.01% |
+41,596
| New | +$398K |
|
3785
Woodside Energy
WDS
$42.2B
| $397K | ﹤0.01% |
+25,465
| New | +$408K |
|
3786
CALL
Bread Financial
BFH
$4.29B
| $396K | ﹤0.01% |
6,500
+3,800
| +141% | +$215K |
|
3787
PUT
Dorchester Minerals
DMLP
$1.3B
| $396K | ﹤0.01% |
11,900
+5,400
| +83% | +$176K |
|
3788
Innoviz Technologies
INVZ
$98.7M
| $396K | ﹤0.01% |
236,185
+48,321
| +26% | +$39.9K |
|
|
KNGS
3789
PUT
DELISTED
Roundhill S&P Dividend Monarchs ETF
KNGS
| $396K | ﹤0.01% |
9,200
+5,000
| +119% | +$144K |
|
3790
CALL
Appian
APPN
$2.03B
| $395K | ﹤0.01% |
12,000
-3,000
| -20% | -$107K |
|
3791
CALL
Paysafe
PSFE
$464M
| $395K | ﹤0.01% |
25,400
-2,100
| -8% | -$42.5K |
|
3792
CALL
Personalis
PSNL
$1.25B
| $394K | ﹤0.01% |
68,200
+63,200
| +1,264% | +$292K |
|
3793
CALL
Grand Canyon Education
LOPE
$4B
| $393K | ﹤0.01% |
2,400
+2,300
| +2,300% | +$352K |
|
3794
Silicon Motion
SIMO
$7.59B
| $393K | ﹤0.01% |
+7,272
| New | +$407K |
|
|
RVNC
3795
PUT
DELISTED
Revance Therapeutics, Inc.
RVNC
| $393K | ﹤0.01% |
129,600
+82,600
| +176% | +$360K |
|
3796
PUT
Eastman Chemical
EMN
$7.81B
| $392K | ﹤0.01% |
4,300
+300
| +8% | +$30.8K |
|
3797
VanEck ChiNext Innovators ETF
CNXT
$105M
| $391K | ﹤0.01% |
14,220
+9,857
| +226% | +$294K |
|
3798
CALL
Casella Waste Systems
CWST
$5.76B
| $391K | ﹤0.01% |
+3,700
| New | +$391K |
|
3799
CALL
PagSeguro Digital
PAGS
$2.67B
| $391K | ﹤0.01% |
62,600
-58,000
| -48% | -$446K |
|
3800
Red Cat Holdings
RCAT
$1.12B
| $391K | ﹤0.01% |
30,483
-43,806
| -59% | -$268K |
|
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.