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 | |
|---|---|---|---|---|---|---|
5726
Oxford Industries
OXM
$566M
| $58K | ﹤0.01% |
+748
| New | +$58.7K |
|
5727
PagSeguro Digital
PAGS
$2.69B
| $58K | ﹤0.01% |
+9,277
| New | +$71.3K |
|
|
HTT
5728
PUT
High Templar Tech Ltd
HTT
$379M
| $58K | ﹤0.01% |
+20,600
| New | +$51.9K |
|
5729
CALL
Seadrill
SDRL
$2.8B
| $58K | ﹤0.01% |
1,500
-18,100
| -92% | -$702K |
|
5730
iShares MSCI India Small-Cap ETF
SMIN
$756M
| $58K | ﹤0.01% |
+760
| New | +$62.2K |
|
|
TEN
5731
Tsakos Energy Navigation Ltd
TEN
$1.21B
| $58K | ﹤0.01% |
3,388
-27,854
| -89% | -$581K |
|
|
ONIT
5732
PUT
Onity Group
ONIT
$309M
| $58K | ﹤0.01% |
+1,900
| New | +$58.8K |
|
5733
CALL
AMC Global Media
AMCX
$492M
| $57K | ﹤0.01% |
5,800
-5,600
| -49% | -$49.5K |
|
5734
PUT
Archrock
AROC
$6.27B
| $57K | ﹤0.01% |
2,300
+2,100
| +1,050% | +$48.6K |
|
5735
CALL
Atea Pharmaceuticals
AVIR
$376M
| $57K | ﹤0.01% |
17,300
+1,800
| +12% | +$5.98K |
|
|
CMRC
5736
Commerce.com Inc Series 1
CMRC
$258M
| $57K | ﹤0.01% |
9,384
-9,327
| -50% | -$58.3K |
|
5737
PUT
DXC Technology
DXC
$1.82B
| $57K | ﹤0.01% |
2,900
-3,800
| -57% | -$80.1K |
|
5738
CALL
FTI Consulting
FCN
$4.4B
| $57K | ﹤0.01% |
300
-2,400
| -89% | -$495K |
|
5739
PUT
Cedar Fair
FUN
$1.77B
| $57K | ﹤0.01% |
1,200
-1,100
| -48% | -$48.2K |
|
5740
PUT
Medallion Financial
MFIN
$229M
| $57K | ﹤0.01% |
6,100
| – | – |
|
5741
CALL
Ocugen
OCGN
$416M
| $57K | ﹤0.01% |
71,800
+6,800
| +10% | +$6.23K |
|
|
RPC
5742
Ridgepost Capital
RPC
$949M
| $57K | ﹤0.01% |
4,577
-5,010
| -52% | -$61.1K |
|
5743
Sphere Entertainment
SPHR
$5.14B
| $57K | ﹤0.01% |
1,427
-11,263
| -89% | -$471K |
|
5744
Titan International
TWI
$466M
| $57K | ﹤0.01% |
+8,521
| New | +$61.4K |
|
5745
CALL
10x Genomics
TXG
$6B
| $57K | ﹤0.01% |
4,000
-7,800
| -66% | -$123K |
|
|
UCTT
5746
CALL
Ultra Clean Holdings
UCTT
$3.73B
| $57K | ﹤0.01% |
1,600
+1,300
| +433% | +$48.1K |
|
5747
PUT
United Microelectronic
UMC
$47.7B
| $57K | ﹤0.01% |
8,800
-10,400
| -54% | -$74.5K |
|
5748
PUT
Vanda Pharmaceuticals
VNDA
$307M
| $57K | ﹤0.01% |
11,900
+8,700
| +272% | +$41.8K |
|
5749
Voyager Therapeutics
VYGR
$183M
| $57K | ﹤0.01% |
10,074
+7,170
| +247% | +$46.2K |
|
|
INFN
5750
CALL
DELISTED
Infinera Corporation Common Stock
INFN
| $57K | ﹤0.01% |
8,700
-75,500
| -90% | -$503K |
|
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.