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 | |
|---|---|---|---|---|---|---|
|
K
2826
CALL
DELISTED
Kellanova
K
| $1.02M | ﹤0.01% |
23,100
-239,300
| -91% | -$19.3M |
|
2827
CALL
Comfort Systems
FIX
$61B
| $1.02M | ﹤0.01% |
2,400
-2,700
| -53% | -$1.19M |
|
2828
PUT
Saic
SAIC
$5.03B
| $1.02M | ﹤0.01% |
9,100
+9,000
| +9,000% | +$1.19M |
|
2829
Ingredion
INGR
$6.38B
| $1.02M | ﹤0.01% |
7,392
+5,698
| +336% | +$802K |
|
2830
CALL
Omeros
OMER
$709M
| $1.02M | ﹤0.01% |
102,900
+54,000
| +110% | +$371K |
|
2831
O'Reilly Automotive
ORLY
$72.4B
| $1.01M | ﹤0.01% |
+12,840
| New | +$1.04M |
|
2832
CALL
Arrowhead Research
ARWR
$12.1B
| $1.01M | ﹤0.01% |
53,800
+35,700
| +197% | +$735K |
|
2833
Realty Income
O
$61.2B
| $1.01M | ﹤0.01% |
+18,938
| New | +$1.1M |
|
2834
PUT
Chemours
CC
$2.59B
| $1.01M | ﹤0.01% |
59,600
-12,500
| -17% | -$243K |
|
2835
PUT
B&G Foods
BGS
$285M
| $1M | ﹤0.01% |
146,000
+28,900
| +25% | +$217K |
|
|
OPTU
2836
CALL
Optimum Communications Inc
OPTU
$316M
| $1M | ﹤0.01% |
416,800
-52,700
| -11% | -$132K |
|
2837
CALL
Invesco DB Base Metals Fund
DBB
$306M
| $1M | ﹤0.01% |
38,900
-3,700
| -9% | -$75K |
|
2838
PUT
Tenaris
TS
$29.1B
| $1M | ﹤0.01% |
26,500
-32,300
| -55% | -$1.15M |
|
2839
CALL
iRhythm Holdings
IRTC
$3.59B
| $1M | ﹤0.01% |
11,100
-57,900
| -84% | -$4.55M |
|
2840
ProShares Ultra VIX Short-Term Futures ETF
UVXY
$249M
| $1M | ﹤0.01% |
+9,659
| New | +$1.14M |
|
|
SMLR
2841
PUT
DELISTED
Semler Scientific
SMLR
| $999K | ﹤0.01% |
+18,500
| New | +$850K |
|
2842
PUT
HEICO Corp Class A
HEI.A
$35.4B
| $998K | ﹤0.01% |
4,200
+1,200
| +40% | +$242K |
|
2843
CALL
Evercore
EVR
$13.1B
| $997K | ﹤0.01% |
3,600
+3,200
| +800% | +$906K |
|
2844
CALL
Ramaco Resources Class A
METC
$676M
| $992K | ﹤0.01% |
98,959
+50,690
| +105% | +$563K |
|
2845
PUT
RB Global
RBA
$20.8B
| $992K | ﹤0.01% |
11,000
+7,500
| +214% | +$671K |
|
2846
PUT
SM Energy
SM
$7.96B
| $992K | ﹤0.01% |
25,600
-1,800
| -7% | -$76K |
|
2847
CNX Resources
CNX
$4.85B
| $990K | ﹤0.01% |
27,005
+23,956
| +786% | +$882K |
|
2848
Coeur Mining
CDE
$15.6B
| $988K | ﹤0.01% |
172,788
+63,476
| +58% | +$411K |
|
2849
Global X Copper Miners ETF NEW
COPX
$7.13B
| $987K | ﹤0.01% |
25,872
+12,596
| +95% | +$545K |
|
2850
PUT
Stride
LRN
$3.69B
| $987K | ﹤0.01% |
9,500
-25,100
| -73% | -$2.39M |
|
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.