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 | |
|---|---|---|---|---|---|---|
|
VTLE
1826
PUT
DELISTED
Vital Energy
VTLE
| $3.07M | ﹤0.01% |
99,200
+12,500
| +14% | +$371K |
|
1827
PUT
Grayscale Bitcoin Trust
GBTC
$9.64B
| $3.06M | ﹤0.01% |
+41,400
| New | +$2.73M |
|
1828
CALL
Aurora
AUR
$11.7B
| $3.06M | ﹤0.01% |
485,700
+105,500
| +28% | +$661K |
|
1829
CALL
Box
BOX
$4.02B
| $3.06M | ﹤0.01% |
96,800
-16,300
| -14% | -$535K |
|
1830
CALL
Glaukos
GKOS
$9.02B
| $3.06M | ﹤0.01% |
20,400
+3,700
| +22% | +$510K |
|
|
MRSH
1831
PUT
Marsh
MRSH
$86.3B
| $3.06M | ﹤0.01% |
14,400
-47,700
| -77% | -$10.6M |
|
1832
NextDecade
NEXT
$1.85B
| $3.05M | ﹤0.01% |
395,637
+363,272
| +1,122% | +$2.33M |
|
1833
Seagate
STX
$193B
| $3.05M | ﹤0.01% |
35,339
-925
| -3% | -$93.1K |
|
1834
CALL
Ares Capital
ARCC
$13.5B
| $3.05M | ﹤0.01% |
139,300
+2,400
| +2% | +$51.8K |
|
1835
PUT
Papa John's
PZZA
$999M
| $3.04M | ﹤0.01% |
74,000
-52,000
| -41% | -$2.55M |
|
1836
CALL
RingCentral
RNG
$4.05B
| $3.04M | ﹤0.01% |
86,700
+1,800
| +2% | +$64.7K |
|
1837
CALL
Omnicom Group
OMC
$22.7B
| $3.03M | ﹤0.01% |
35,200
+10,600
| +43% | +$1.05M |
|
1838
PUT
C.H. Robinson
CHRW
$22B
| $3.03M | ﹤0.01% |
29,300
-13,500
| -32% | -$1.45M |
|
1839
Celanese
CE
$5.09B
| $3.02M | ﹤0.01% |
+43,696
| New | +$4.2M |
|
1840
PUT
Valaris
VAL
$5.51B
| $3.02M | ﹤0.01% |
68,300
+12,300
| +22% | +$592K |
|
1841
CALL
Innovative Industrial Properties
IIPR
$1.78B
| $3.02M | ﹤0.01% |
45,300
+3,500
| +8% | +$394K |
|
1842
Invitation Homes
INVH
$17.7B
| $3.02M | ﹤0.01% |
94,410
-73,667
| -44% | -$2.46M |
|
1843
CALL
Ollie's Bargain Outlet
OLLI
$4.01B
| $3.02M | ﹤0.01% |
27,500
-19,400
| -41% | -$1.93M |
|
1844
CALL
Signet Jewelers
SIG
$3.55B
| $3.01M | ﹤0.01% |
37,300
-26,200
| -41% | -$2.44M |
|
1845
PUT
Bitdeer Technologies
BTDR
$2.81B
| $3.01M | ﹤0.01% |
138,900
+64,900
| +88% | +$825K |
|
1846
CALL
Kohl's
KSS
$2.03B
| $3.01M | ﹤0.01% |
214,200
-131,700
| -38% | -$2.27M |
|
1847
PUT
Klaviyo
KVYO
$4.91B
| $3.01M | ﹤0.01% |
72,900
+31,000
| +74% | +$1.18M |
|
1848
PUT
United States Gasoline Fund
UGA
$142M
| $3M | ﹤0.01% |
47,700
+46,800
| +5,200% | +$2.89M |
|
1849
CALL
Vail Resorts
MTN
$5.19B
| $3M | ﹤0.01% |
16,000
-19,200
| -55% | -$3.44M |
|
|
ARR
1850
PUT
Armour Residential REIT
ARR
$2.02B
| $2.99M | ﹤0.01% |
158,400
+500
| +0.3% | +$9.59K |
|
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.