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 | |
|---|---|---|---|---|---|---|
1051
PUT
Shake Shack
SHAK
$2.26B
| $9.72M | 0.01% |
74,900
+16,900
| +29% | +$2.07M |
|
1052
CALL
Paychex
PAYX
$39.4B
| $9.72M | 0.01% |
69,300
-97,300
| -58% | -$13.8M |
|
|
NBIS
1053
CALL
Nebius Group N.V.
NBIS
$56.1B
| $9.71M | 0.01% |
+350,600
| New | +$8.55M |
|
1054
PUT
Mondelez International
MDLZ
$77.1B
| $9.68M | 0.01% |
162,000
+700
| +0.4% | +$46.3K |
|
1055
PUT
Nutanix
NTNX
$14.2B
| $9.67M | 0.01% |
158,100
+23,000
| +17% | +$1.5M |
|
1056
PUT
Atmos Energy
ATO
$29.7B
| $9.66M | 0.01% |
69,400
+69,000
| +17,250% | +$9.82M |
|
1057
PUT
MSCI
MSCI
$40.2B
| $9.66M | 0.01% |
16,100
+5,600
| +53% | +$3.36M |
|
1058
PUT
Academy Sports + Outdoors
ASO
$2.92B
| $9.64M | 0.01% |
167,600
+50,400
| +43% | +$2.66M |
|
|
CTRA
1059
CALL
DELISTED
Coterra Energy
CTRA
| $9.64M | 0.01% |
377,400
+100
| +0% | +$2.49K |
|
1060
PUT
Burlington
BURL
$21.4B
| $9.61M | 0.01% |
33,700
+11,900
| +55% | +$3.22M |
|
1061
CALL
CarMax
KMX
$8.29B
| $9.59M | 0.01% |
117,300
-3,100
| -3% | -$243K |
|
1062
PUT
Aon
AON
$76B
| $9.59M | 0.01% |
26,700
-13,900
| -34% | -$5.11M |
|
1063
PUT
WillScot Mobile Mini Holdings
WSC
$4.87B
| $9.55M | 0.01% |
285,600
+188,100
| +193% | +$6.91M |
|
|
1064
PUT
Paychex
PAYX
$39.4B
| $9.48M | 0.01% |
67,600
-138,900
| -67% | -$19.7M |
|
1065
PUT
NetEase
NTES
$76.9B
| $9.47M | 0.01% |
106,200
+6,300
| +6% | +$552K |
|
1066
PUT
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $9.46M | 0.01% |
205,200
+200,800
| +4,564% | +$5.6M |
|
1067
CALL
Stellantis
STLA
$16.7B
| $9.46M | 0.01% |
724,900
+100,900
| +16% | +$1.34M |
|
|
WBA
1068
DELISTED
Walgreens Boots Alliance
WBA
| $9.43M | 0.01% |
1,010,899
-499,958
| -33% | -$4.64M |
|
1069
CALL
Crown Castle
CCI
$32.6B
| $9.43M | 0.01% |
103,900
-6,200
| -6% | -$648K |
|
1070
Salesforce
CRM
$129B
| $9.43M | 0.01% |
28,203
+9,985
| +55% | +$3.19M |
|
1071
CALL
Plains All American Pipeline
PAA
$17.4B
| $9.43M | 0.01% |
551,900
-182,000
| -25% | -$3.17M |
|
1072
PUT
Arthur J. Gallagher & Co
AJG
$62.2B
| $9.39M | 0.01% |
33,100
+30,900
| +1,405% | +$8.99M |
|
1073
CALL
Raymond James Financial
RJF
$31.9B
| $9.38M | 0.01% |
60,400
+51,500
| +579% | +$7.78M |
|
1074
CALL
T. Rowe Price
TROW
$24.6B
| $9.38M | 0.01% |
82,900
-47,400
| -36% | -$5.49M |
|
1075
CALL
State Street
STT
$50.6B
| $9.36M | 0.01% |
95,400
+15,500
| +19% | +$1.47M |
|
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.