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 | |
|---|---|---|---|---|---|---|
1026
CALL
MSCI
MSCI
$40.2B
| $10.1M | 0.01% |
16,900
+11,500
| +213% | +$6.9M |
|
1027
CALL
TransDigm Group
TDG
$67.9B
| $10.1M | 0.01% |
8,000
+5,900
| +281% | +$7.77M |
|
1028
CALL
Trane Technologies
TT
$106B
| $10.1M | 0.01% |
27,400
-8,900
| -25% | -$3.53M |
|
1029
CALL
Jabil
JBL
$33.7B
| $10.1M | 0.01% |
70,200
-90,500
| -56% | -$11.9M |
|
1030
CALL
Royal Gold
RGLD
$16.9B
| $10.1M | 0.01% |
76,300
-11,400
| -13% | -$1.65M |
|
1031
PUT
Quantum Computing Inc
QUBT
$1.77B
| $10.1M | 0.01% |
+607,800
| New | +$3.34M |
|
1032
SLB Ltd
SLB
$70.6B
| $10M | 0.01% |
262,092
+169,619
| +183% | +$7.12M |
|
1033
PUT
TG Therapeutics
TGTX
$8.5B
| $9.99M | 0.01% |
332,000
+188,500
| +131% | +$5.41M |
|
1034
CALL
Centrus Energy
LEU
$3.36B
| $9.98M | 0.01% |
149,900
+56,700
| +61% | +$4.42M |
|
1035
CALL
Fair Isaac
FICO
$28B
| $9.95M | 0.01% |
5,000
+1,900
| +61% | +$4.06M |
|
|
XYZ
1036
Block Inc
XYZ
$45.5B
| $9.95M | 0.01% |
+117,078
| New | +$9.6M |
|
1037
PUT
Whirlpool
WHR
$2.31B
| $9.93M | 0.01% |
86,700
-100,600
| -54% | -$11.1M |
|
1038
Freeport-McMoran
FCX
$91.3B
| $9.92M | 0.01% |
260,533
-164,664
| -39% | -$7.37M |
|
1039
CALL
Targa Resources
TRGP
$61.3B
| $9.91M | 0.01% |
55,500
-4,200
| -7% | -$753K |
|
1040
CALL
Builders FirstSource
BLDR
$7.59B
| $9.9M | 0.01% |
69,300
-1,400
| -2% | -$248K |
|
|
GRMN
1041
CALL
Garmin
GRMN
$46.3B
| $9.9M | 0.01% |
48,000
+1,200
| +3% | +$235K |
|
1042
CALL
Check Point Software Technologies
CHKP
$12.9B
| $9.89M | 0.01% |
53,000
+41,600
| +365% | +$7.84M |
|
1043
PUT
Celestica
CLS
$38.5B
| $9.88M | 0.01% |
107,100
-24,100
| -18% | -$1.89M |
|
1044
CALL
Cognizant
CTSH
$20.3B
| $9.88M | 0.01% |
128,500
-102,200
| -44% | -$8M |
|
1045
CALL
Navios Maritime Partners
NMM
$2.18B
| $9.84M | 0.01% |
227,200
| – | – |
|
1046
VF Corp
VFC
$6.49B
| $9.83M | 0.01% |
457,943
+110,569
| +32% | +$2.25M |
|
1047
PUT
Lincoln National
LNC
$7.81B
| $9.81M | 0.01% |
309,500
-51,900
| -14% | -$1.73M |
|
1048
CALL
VanEck Durable High Dividend ETF
DURA
$38.4M
| $9.81M | 0.01% |
39,400
-46,900
| -54% | -$1.61M |
|
1049
CALL
Macy's
M
$6.14B
| $9.8M | 0.01% |
578,900
+367,600
| +174% | +$5.86M |
|
1050
PUT
Cardinal Health
CAH
$52.9B
| $9.77M | 0.01% |
82,600
+32,100
| +64% | +$3.75M |
|
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.