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 | |
|---|---|---|---|---|---|---|
5526
PUT
Veritone
VERI
$101M
| $70K | ﹤0.01% |
21,400
+6,400
| +43% | +$20.7K |
|
5527
CALL
Atmos Energy
ATO
$28.8B
| $69K | ﹤0.01% |
500
| – | – |
|
|
CCC
5528
CCC Intelligent Solutions
CCC
$3.59B
| $69K | ﹤0.01% |
5,952
+620
| +12% | +$7.18K |
|
5529
Evergy
EVRG
$19.1B
| $69K | ﹤0.01% |
1,123
-2,947
| -72% | -$182K |
|
5530
EyePoint Inc
EYPT
$1.03B
| $69K | ﹤0.01% |
+9,353
| New | +$87.1K |
|
5531
Golub Capital BDC
GBDC
$3.34B
| $69K | ﹤0.01% |
+4,557
| New | +$69.5K |
|
5532
CALL
Disc Medicine
IRON
$2.96B
| $69K | ﹤0.01% |
+1,100
| New | +$63.6K |
|
5533
PUT
ManpowerGroup
MAN
$2.44B
| $69K | ﹤0.01% |
1,200
+1,000
| +500% | +$63.7K |
|
5534
PUT
Insperity
NSP
$1.93B
| $69K | ﹤0.01% |
900
| – | – |
|
5535
CarParts.com
PRTS
$43.7M
| $69K | ﹤0.01% |
6,435
+1,955
| +44% | +$18K |
|
5536
Tenaya Therapeutics
TNYA
$161M
| $69K | ﹤0.01% |
48,268
+47,560
| +6,718% | +$107K |
|
5537
PUT
Trex
TREX
$4.51B
| $69K | ﹤0.01% |
1,000
-2,100
| -68% | -$148K |
|
|
VTYX
5538
CALL
DELISTED
Ventyx Biosciences
VTYX
| $69K | ﹤0.01% |
31,700
-500
| -2% | -$1.13K |
|
5539
Alcon
ALC
$33.6B
| $68K | ﹤0.01% |
+812
| New | +$73.2K |
|
5540
Andersons Inc
ANDE
$2.41B
| $68K | ﹤0.01% |
1,686
+756
| +81% | +$35.1K |
|
5541
BARK
BARK
$81.8M
| $68K | ﹤0.01% |
1,857
+218
| +13% | +$7.64K |
|
5542
PUT
United States Brent Oil Fund
BNO
$781M
| $68K | ﹤0.01% |
2,300
-1,000
| -30% | -$29.5K |
|
5543
Carlisle Companies
CSL
$14.3B
| $68K | ﹤0.01% |
+187
| New | +$81.5K |
|
|
CVGW
5544
DELISTED
Calavo Growers
CVGW
| $68K | ﹤0.01% |
2,688
-998
| -27% | -$27.2K |
|
5545
CALL
Invesco CurrencyShares Canadian Dollar Trust
FXC
$73.2M
| $68K | ﹤0.01% |
1,000
+700
| +233% | +$49K |
|
|
HDSN
5546
CALL
Hudson Technologies
HDSN
$254M
| $68K | ﹤0.01% |
12,200
+9,900
| +430% | +$65.2K |
|
5547
PUT
iShares iBonds 2030 Term High Yield and Income ETF
IBHJ
$151M
| $68K | ﹤0.01% |
8,200
+7,800
| +1,950% | +$206K |
|
5548
CALL
International Money Express
IMXI
$357M
| $68K | ﹤0.01% |
3,300
-38,900
| -92% | -$764K |
|
|
LADR
5549
CALL
Ladder Capital
LADR
$1.21B
| $68K | ﹤0.01% |
6,100
-2,900
| -32% | -$33.3K |
|
|
ORC
5550
CALL
Orchid Island Capital
ORC
$1.3B
| $68K | ﹤0.01% |
8,800
+5,200
| +144% | +$40.9K |
|
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.