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 | |
|---|---|---|---|---|---|---|
5676
CALL
Andersons Inc
ANDE
$2.41B
| $60K | ﹤0.01% |
1,500
+1,400
| +1,400% | +$65K |
|
5677
Aterian
ATER
$4.45M
| $60K | ﹤0.01% |
25,179
-9,331
| -27% | -$24.8K |
|
5678
CALL
BRC Inc
BRCC
$121M
| $60K | ﹤0.01% |
19,200
-4,600
| -19% | -$14.4K |
|
|
DDL
5679
PUT
Dingdong
DDL
$562M
| $60K | ﹤0.01% |
+18,500
| New | +$71.6K |
|
5680
PUT
First Industrial Realty Trust
FR
$8.73B
| $60K | ﹤0.01% |
1,200
+200
| +20% | +$10.6K |
|
5681
Comstock
LODE
$208M
| $60K | ﹤0.01% |
7,521
+7,494
| +27,756% | +$32K |
|
5682
Penske Automotive Group
PAG
$14.3B
| $60K | ﹤0.01% |
+399
| New | +$63.3K |
|
5683
Pliant Therapeutics
PLRX
$64.4M
| $60K | ﹤0.01% |
4,578
+1,720
| +60% | +$23.5K |
|
5684
CALL
Pulse Biosciences
PLSE
$2.43B
| $60K | ﹤0.01% |
3,500
-7,300
| -68% | -$129K |
|
5685
PUT
Q2 Holdings
QTWO
$3.8B
| $60K | ﹤0.01% |
600
-300
| -33% | -$28.5K |
|
5686
Rekor Systems
REKR
$85.8M
| $60K | ﹤0.01% |
38,599
+37,228
| +2,715% | +$38.6K |
|
5687
CALL
System1
SST
$14.3M
| $60K | ﹤0.01% |
6,720
+970
| +17% | +$9.76K |
|
5688
PUT
UDR
UDR
$12.3B
| $60K | ﹤0.01% |
1,400
-1,000
| -42% | -$44.2K |
|
|
VMEO
5689
CALL
DELISTED
Vimeo
VMEO
| $60K | ﹤0.01% |
9,400
+6,400
| +213% | +$38.5K |
|
|
AVGX
5690
Defiance Daily Target 2X Long AVGO ETF
AVGX
$248M
| $60K | ﹤0.01% |
+1,880
| New | +$42.9K |
|
|
ROIC
5691
PUT
DELISTED
Retail Opportunity Investments Corp.
ROIC
| $60K | ﹤0.01% |
+3,500
| New | +$58.5K |
|
|
ML
5692
CALL
DELISTED
MoneyLion Inc.
ML
| $60K | ﹤0.01% |
700
-4,900
| -88% | -$331K |
|
5693
CALL
Aclaris Therapeutics
ACRS
$726M
| $59K | ﹤0.01% |
23,800
+3,600
| +18% | +$8.96K |
|
5694
Diana Shipping
DSX
$302M
| $59K | ﹤0.01% |
30,106
+10,661
| +55% | +$22.7K |
|
5695
CALL
DXC Technology
DXC
$1.82B
| $59K | ﹤0.01% |
3,000
-63,200
| -95% | -$1.33M |
|
|
DMC
5696
Del Monte Corp
DMC
$1.41B
| $59K | ﹤0.01% |
+1,798
| New | +$57.7K |
|
5697
Gates Industrial Corporation Ltd.
GTES
$7.08B
| $59K | ﹤0.01% |
+2,886
| New | +$58.2K |
|
5698
CALL
Hain Celestial
HAIN
$45M
| $59K | ﹤0.01% |
9,700
+8,800
| +978% | +$70.4K |
|
5699
Herc Holdings
HRI
$5.02B
| $59K | ﹤0.01% |
+315
| New | +$63.5K |
|
5700
IDEX
IEX
$17B
| $59K | ﹤0.01% |
284
+186
| +190% | +$40.7K |
|
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.