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 | |
|---|---|---|---|---|---|---|
576
PUT
RH
RH
$3.31B
| $22.4M | 0.01% |
56,900
-62,700
| -52% | -$22.3M |
|
577
PUT
Mobileye
MBLY
$7.39B
| $22.4M | 0.01% |
1,123,000
+436,300
| +64% | +$6.87M |
|
578
PUT
Nucor
NUE
$53.7B
| $22.3M | 0.01% |
191,300
+18,900
| +11% | +$2.72M |
|
579
CALL
Caesars Entertainment
CZR
$6.1B
| $22.2M | 0.01% |
664,900
-101,500
| -13% | -$4.02M |
|
580
PUT
ResMed
RMD
$28B
| $22.2M | 0.01% |
97,100
+35,100
| +57% | +$8.45M |
|
581
CALL
The GEO Group
GEO
$4.19B
| $22.2M | 0.01% |
793,200
+27,200
| +4% | +$603K |
|
582
PUT
XPO
XPO
$25.1B
| $22.2M | 0.01% |
169,200
+18,900
| +13% | +$2.55M |
|
583
Baidu
BIDU
$36.6B
| $22.2M | 0.01% |
263,179
+58,389
| +29% | +$5.33M |
|
584
PUT
GraniteShares Bloomberg Commodity Broad Strategy No K-1 ETF
COMB
$135M
| $22.1M | 0.01% |
396,100
+182,300
| +85% | +$3.7M |
|
585
CALL
LyondellBasell Industries
LYB
$20.1B
| $22.1M | 0.01% |
297,900
+77,000
| +35% | +$6.47M |
|
586
PUT
Lyft
LYFT
$5.57B
| $22.1M | 0.01% |
1,713,400
+99,700
| +6% | +$1.48M |
|
587
CALL
D.R. Horton
DHI
$40.4B
| $22M | 0.01% |
157,700
-11,800
| -7% | -$1.97M |
|
588
CALL
IonQ
IONQ
$12.9B
| $22M | 0.01% |
526,100
-161,400
| -23% | -$4.05M |
|
589
PUT
Eaton
ETN
$158B
| $21.9M | 0.01% |
66,100
-16,200
| -20% | -$5.69M |
|
|
GAP
590
PUT
The Gap Inc
GAP
$7.07B
| $21.9M | 0.01% |
928,100
+280,800
| +43% | +$6.4M |
|
591
PUT
3M
MMM
$89.1B
| $21.9M | 0.01% |
296,400
-87,700
| -23% | -$11.5M |
|
592
PUT
Ross Stores
ROST
$76.4B
| $21.8M | 0.01% |
144,000
+37,400
| +35% | +$5.5M |
|
593
PUT
Lamb Weston
LW
$6.63B
| $21.7M | 0.01% |
325,400
-117,400
| -27% | -$8.76M |
|
594
CALL
Kraft Heinz
KHC
$30.8B
| $21.7M | 0.01% |
706,100
-230,000
| -25% | -$7.54M |
|
595
CALL
Bilibili
BILI
$7.4B
| $21.6M | 0.01% |
1,194,600
-163,700
| -12% | -$3.43M |
|
596
PUT
Brinker International
EAT
$8.03B
| $21.6M | 0.01% |
163,300
+123,400
| +309% | +$13.9M |
|
597
PUT
Zillow
Z
$7.18B
| $21.6M | 0.01% |
291,500
+4,000
| +1% | +$286K |
|
598
PUT
GameStop
GME
$9.69B
| $21.5M | 0.01% |
687,600
-670,300
| -49% | -$17.2M |
|
599
PUT
iShares Core MSCI Emerging Markets ETF
IEMG
$153B
| $21.5M | 0.01% |
405,200
-205,100
| -34% | -$11.4M |
|
|
ZVOL
600
PUT
Volatility Premium Plus ETF
ZVOL
$13.1M
| $21.5M | 0.01% |
644,800
+559,500
| +656% | +$11.1M |
|
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.