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 | |
|---|---|---|---|---|---|---|
|
GAP
1251
CALL
The Gap Inc
GAP
$6.9B
| $6.9M | ﹤0.01% |
292,000
-14,900
| -5% | -$340K |
|
1252
PUT
Stanley Black & Decker
SWK
$14.2B
| $6.9M | ﹤0.01% |
85,900
-45,300
| -35% | -$4.2M |
|
|
ALTR
1253
PUT
DELISTED
Altair Engineering Inc
ALTR
| $6.88M | ﹤0.01% |
63,100
+10,900
| +21% | +$1.12M |
|
1254
CALL
Procore
PCOR
$6.42B
| $6.87M | ﹤0.01% |
91,700
+33,600
| +58% | +$2.38M |
|
1255
PUT
BioMarin Pharmaceuticals
BMRN
$11.5B
| $6.86M | ﹤0.01% |
104,400
-19,400
| -16% | -$1.3M |
|
1256
PUT
Restaurant Brands International
QSR
$25.3B
| $6.84M | ﹤0.01% |
105,000
+39,500
| +60% | +$2.74M |
|
1257
CALL
Otis Worldwide
OTIS
$27.4B
| $6.83M | ﹤0.01% |
73,800
+40,200
| +120% | +$4.03M |
|
1258
PUT
Cytokinetics
CYTK
$11.1B
| $6.82M | ﹤0.01% |
144,900
-22,400
| -13% | -$1.16M |
|
|
CGC
1259
CALL
Canopy Growth
CGC
$375M
| $6.81M | ﹤0.01% |
2,484,800
-97,200
| -4% | -$386K |
|
1260
PUT
Alnylam Pharmaceuticals
ALNY
$36.7B
| $6.8M | ﹤0.01% |
28,900
-1,700
| -6% | -$447K |
|
1261
PUT
Edison International
EIX
$30.6B
| $6.79M | ﹤0.01% |
85,100
-62,400
| -42% | -$5.22M |
|
1262
PUT
Hewlett Packard
HPE
$64.5B
| $6.75M | ﹤0.01% |
316,400
-253,300
| -44% | -$5.35M |
|
1263
CALL
Amplify Online Retail ETF
IBUY
$106M
| $6.74M | ﹤0.01% |
762,100
-29,600
| -4% | -$1.91M |
|
1264
CALL
United States Natural Gas Fund
UNG
$472M
| $6.73M | ﹤0.01% |
400,600
+21,100
| +6% | +$302K |
|
1265
CALL
BWX Technologies
BWXT
$16.1B
| $6.73M | ﹤0.01% |
60,400
+43,800
| +264% | +$5.35M |
|
1266
Capital One
COF
$124B
| $6.73M | ﹤0.01% |
37,719
+21,251
| +129% | +$3.68M |
|
1267
CALL
Corteva
CTVA
$59.2B
| $6.73M | ﹤0.01% |
118,100
+8,600
| +8% | +$509K |
|
|
FL
1268
CALL
DELISTED
Foot Locker
FL
| $6.73M | ﹤0.01% |
309,100
+80,400
| +35% | +$1.88M |
|
1269
CALL
Align Technology
ALGN
$12.1B
| $6.71M | ﹤0.01% |
32,200
-10,300
| -24% | -$2.3M |
|
1270
PUT
Applied Optoelectronics
AAOI
$8.23B
| $6.71M | ﹤0.01% |
182,000
+100,200
| +122% | +$2.7M |
|
1271
PUT
Viking Therapeutics
VKTX
$4.08B
| $6.7M | ﹤0.01% |
166,500
+14,200
| +9% | +$810K |
|
1272
Eaton
ETN
$158B
| $6.69M | ﹤0.01% |
20,153
-11,109
| -36% | -$3.9M |
|
|
WCC
1273
PUT
WESCO International
WCC
$16.2B
| $6.68M | ﹤0.01% |
36,900
-16,800
| -31% | -$3.18M |
|
1274
PUT
Sherwin-Williams
SHW
$78.4B
| $6.66M | ﹤0.01% |
19,600
+5,300
| +37% | +$1.98M |
|
1275
PUT
TeraWulf
WULF
$9.58B
| $6.65M | ﹤0.01% |
1,175,300
+252,700
| +27% | +$1.63M |
|
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.