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 | |
|---|---|---|---|---|---|---|
1501
CALL
Franklin Resources
BEN
$16.9B
| $4.82M | ﹤0.01% |
237,800
-380,200
| -62% | -$8.01M |
|
1502
CALL
Equinix
EQIX
$107B
| $4.81M | ﹤0.01% |
5,100
-800
| -14% | -$736K |
|
1503
CALL
DigitalOcean
DOCN
$14.4B
| $4.8M | ﹤0.01% |
141,000
+16,400
| +13% | +$643K |
|
|
DFS
1504
PUT
DELISTED
Discover Financial Services
DFS
| $4.78M | ﹤0.01% |
27,600
-35,300
| -56% | -$5.79M |
|
1505
PUT
Gold Fields
GFI
$29.2B
| $4.78M | ﹤0.01% |
362,000
-92,900
| -20% | -$1.41M |
|
1506
PUT
Iron Mountain
IRM
$38.2B
| $4.76M | ﹤0.01% |
45,300
-299,800
| -87% | -$35.2M |
|
1507
Petrobras
PBR
$121B
| $4.75M | ﹤0.01% |
369,820
+103,017
| +39% | +$1.44M |
|
1508
CALL
Bunge Global
BG
$23.6B
| $4.74M | ﹤0.01% |
61,000
-22,600
| -27% | -$1.98M |
|
1509
PUT
Sarepta Therapeutics
SRPT
$1.66B
| $4.74M | ﹤0.01% |
39,000
-6,700
| -15% | -$821K |
|
1510
PUT
argenx
ARGX
$57.4B
| $4.74M | ﹤0.01% |
7,700
-8,600
| -53% | -$5.04M |
|
1511
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$712M
| $4.74M | ﹤0.01% |
98,400
+5,600
| +6% | +$233K |
|
1512
CALL
Southern Copper
SCCO
$141B
| $4.71M | ﹤0.01% |
54,571
-14,252
| -21% | -$1.42M |
|
1513
CALL
Teladoc Health
TDOC
$1.58B
| $4.71M | ﹤0.01% |
518,100
-231,300
| -31% | -$2.23M |
|
1514
CALL
Hormel Foods
HRL
$13.9B
| $4.71M | ﹤0.01% |
150,100
+93,500
| +165% | +$2.93M |
|
1515
Jabil
JBL
$32.8B
| $4.7M | ﹤0.01% |
32,646
+4,623
| +16% | +$606K |
|
1516
QuantumScape Corp
QS
$3B
| $4.69M | ﹤0.01% |
903,943
+408,472
| +82% | +$2.14M |
|
1517
CALL
Logitech
LOGI
$15.2B
| $4.68M | ﹤0.01% |
56,900
+12,400
| +28% | +$1.03M |
|
1518
PUT
Root
ROOT
$917M
| $4.68M | ﹤0.01% |
64,500
+40,400
| +168% | +$2.79M |
|
1519
CALL
CoreCivic
CXW
$3.1B
| $4.67M | ﹤0.01% |
214,700
+90,300
| +73% | +$1.65M |
|
1520
PUT
International Flavors & Fragrances
IFF
$19.4B
| $4.67M | ﹤0.01% |
55,200
-19,300
| -26% | -$1.81M |
|
|
1521
PUT
CoreCivic
CXW
$3.1B
| $4.66M | ﹤0.01% |
214,500
-11,200
| -5% | -$205K |
|
1522
Teck Resources
TECK
$29.5B
| $4.65M | ﹤0.01% |
114,849
+1,231
| +1% | +$57.5K |
|
|
JWN
1523
CALL
DELISTED
Nordstrom
JWN
| $4.65M | ﹤0.01% |
192,500
+22,900
| +14% | +$529K |
|
1524
PUT
Kinross Gold
KGC
$28.5B
| $4.65M | ﹤0.01% |
501,500
-121,900
| -20% | -$1.2M |
|
1525
Steel Dynamics
STLD
$35.6B
| $4.64M | ﹤0.01% |
40,720
-43,443
| -52% | -$5.77M |
|
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.