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 | |
|---|---|---|---|---|---|---|
3826
CALL
Vanguard S&P 500 Growth ETF
VOOG
$25.2B
| $380K | ﹤0.01% |
10,200
-1,800
| -15% | -$108K |
|
3827
PUT
Haleon
HLN
$45.2B
| $379K | ﹤0.01% |
39,800
+38,900
| +4,322% | +$381K |
|
3828
PUT
Ero Copper
ERO
$2.67B
| $378K | ﹤0.01% |
28,100
+8,800
| +46% | +$149K |
|
3829
SFL Corp
SFL
$1.61B
| $378K | ﹤0.01% |
37,054
-249
| -0.7% | -$2.66K |
|
|
SPTN
3830
CALL
DELISTED
SpartanNash
SPTN
| $377K | ﹤0.01% |
20,600
+1,300
| +7% | +$26K |
|
3831
CALL
BellRing Brands
BRBR
$1.59B
| $376K | ﹤0.01% |
5,000
-53,000
| -91% | -$3.77M |
|
3832
PUT
Array Technologies
ARRY
$785M
| $375K | ﹤0.01% |
62,100
-71,700
| -54% | -$457K |
|
3833
ICL Group
ICL
$6.76B
| $375K | ﹤0.01% |
76,004
+21,242
| +39% | +$95K |
|
3834
PUT
Pool Corp
POOL
$7B
| $375K | ﹤0.01% |
1,100
-5,000
| -82% | -$1.82M |
|
3835
CALL
Tanger
SKT
$4.84B
| $375K | ﹤0.01% |
11,000
-18,800
| -63% | -$655K |
|
3836
PUT
American Coastal Insurance
ACIC
$526M
| $374K | ﹤0.01% |
27,800
-25,800
| -48% | -$322K |
|
3837
CALL
American Homes 4 Rent
AMH
$12.2B
| $374K | ﹤0.01% |
+10,000
| New | +$374K |
|
3838
CALL
Ambev
ABEV
$48.4B
| $373K | ﹤0.01% |
201,900
+60,000
| +42% | +$133K |
|
3839
PUT
Century Aluminum
CENX
$4.35B
| $373K | ﹤0.01% |
20,500
+3,800
| +23% | +$74.7K |
|
3840
Charles River Laboratories
CRL
$11.6B
| $372K | ﹤0.01% |
2,019
-1,150
| -36% | -$222K |
|
3841
CALL
Globus Medical
GMED
$10.9B
| $372K | ﹤0.01% |
4,500
-2,200
| -33% | -$174K |
|
3842
CALL
Mercer International
MERC
$45.6M
| $372K | ﹤0.01% |
57,300
+41,400
| +260% | +$271K |
|
3843
CALL
Portillo's
PTLO
$339M
| $372K | ﹤0.01% |
39,600
-25,400
| -39% | -$291K |
|
|
SWTX
3844
PUT
DELISTED
SpringWorks Therapeutics
SWTX
| $372K | ﹤0.01% |
10,300
-8,900
| -46% | -$311K |
|
3845
PUT
Tidewater
TDW
$3.71B
| $372K | ﹤0.01% |
6,800
-48,800
| -88% | -$2.78M |
|
3846
Krispy Kreme
DNUT
$564M
| $371K | ﹤0.01% |
37,396
-26,378
| -41% | -$286K |
|
|
SFIX
3847
PUT
Stitch Fix
SFIX
$563M
| $371K | ﹤0.01% |
86,100
+27,800
| +48% | +$102K |
|
3848
Cooper-Standard Automotive
CPS
$526M
| $370K | ﹤0.01% |
27,294
+23,095
| +550% | +$330K |
|
3849
PUT
Hamilton Lane
HLNE
$3.91B
| $370K | ﹤0.01% |
2,500
| – | – |
|
3850
CALL
El Pollo Loco
LOCO
$497M
| $370K | ﹤0.01% |
32,100
+15,600
| +95% | +$197K |
|
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.