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 | |
|---|---|---|---|---|---|---|
1301
PUT
ICICI Bank
IBN
$106B
| $6.4M | ﹤0.01% |
214,500
+157,300
| +275% | +$4.75M |
|
1302
CALL
Magna International
MGA
$18B
| $6.39M | ﹤0.01% |
152,900
-35,000
| -19% | -$1.5M |
|
1303
CALL
Novartis
NVS
$294B
| $6.39M | ﹤0.01% |
70,300
-26,500
| -27% | -$2.83M |
|
1304
PUT
Canadian Pacific Kansas City
CP
$81.9B
| $6.37M | ﹤0.01% |
88,000
+63,400
| +258% | +$4.88M |
|
1305
CALL
Magnite
MGNI
$2.67B
| $6.35M | ﹤0.01% |
398,700
-46,600
| -10% | -$684K |
|
1306
PUT
Credo Technology Group
CRDO
$40.5B
| $6.34M | ﹤0.01% |
94,400
+80,300
| +570% | +$3.99M |
|
1307
CALL
Insmed
INSM
$23.2B
| $6.34M | ﹤0.01% |
91,900
+25,100
| +38% | +$1.81M |
|
1308
CALL
Applied Digital
APLD
$7.92B
| $6.34M | ﹤0.01% |
830,200
-407,400
| -33% | -$3.39M |
|
1309
CALL
Pan American Silver
PAAS
$18.6B
| $6.32M | ﹤0.01% |
313,400
-900
| -0.3% | -$20.1K |
|
1310
PUT
Welltower
WELL
$177B
| $6.31M | ﹤0.01% |
50,100
+7,100
| +17% | +$932K |
|
1311
PENN Entertainment
PENN
$2.76B
| $6.29M | ﹤0.01% |
317,286
+126,274
| +66% | +$2.48M |
|
1312
Amgen
AMGN
$203B
| $6.27M | ﹤0.01% |
+24,073
| New | +$7.14M |
|
1313
CALL
Golar LNG
GLNG
$5B
| $6.27M | ﹤0.01% |
148,100
-39,000
| -21% | -$1.52M |
|
|
UCD
1314
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $6.25M | ﹤0.01% |
154,900
-19,300
| -11% | -$779K |
|
1315
PUT
Ralph Lauren
RL
$22.3B
| $6.24M | ﹤0.01% |
27,000
-31,500
| -54% | -$6.71M |
|
1316
PUT
Dutch Bros
BROS
$8.83B
| $6.23M | ﹤0.01% |
119,000
-114,100
| -49% | -$5.03M |
|
1317
CALL
Huntington Bancshares
HBAN
$35B
| $6.23M | ﹤0.01% |
382,900
+172,200
| +82% | +$2.83M |
|
|
MRSH
1318
CALL
Marsh
MRSH
$85.6B
| $6.22M | ﹤0.01% |
29,300
-18,900
| -39% | -$4.19M |
|
1319
CALL
Cenovus Energy
CVE
$54.6B
| $6.21M | ﹤0.01% |
409,600
+15,700
| +4% | +$253K |
|
1320
PUT
Unilever
UL
$131B
| $6.19M | ﹤0.01% |
97,067
-21,422
| -18% | -$1.45M |
|
1321
CALL
Freshpet
FRPT
$2.82B
| $6.18M | ﹤0.01% |
41,700
-6,700
| -14% | -$976K |
|
1322
PUT
Coupang
CPNG
$27.9B
| $6.17M | ﹤0.01% |
280,500
-159,500
| -36% | -$3.91M |
|
1323
PUT
Duolingo
DUOL
$5.74B
| $6.16M | ﹤0.01% |
19,000
-63,800
| -77% | -$20.3M |
|
1324
CALL
Arthur J. Gallagher & Co
AJG
$63.3B
| $6.16M | ﹤0.01% |
21,700
+17,400
| +405% | +$5.06M |
|
1325
PUT
Match Group
MTCH
$8.92B
| $6.16M | ﹤0.01% |
188,300
+125,100
| +198% | +$4.29M |
|
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.