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 | |
|---|---|---|---|---|---|---|
6326
CALL
Stereotaxis
STXS
$126M
| $31K | ﹤0.01% |
+14,000
| New | +$29.3K |
|
6327
CALL
The Bancorp
TBBK
$2.79B
| $31K | ﹤0.01% |
600
-2,900
| -83% | -$159K |
|
6328
PUT
Telos
TLS
$332M
| $31K | ﹤0.01% |
9,100
+3,100
| +52% | +$11.1K |
|
6329
US Gold Corp
USAU
$214M
| $31K | ﹤0.01% |
+5,209
| New | +$34.5K |
|
|
VTYX
6330
PUT
DELISTED
Ventyx Biosciences
VTYX
| $31K | ﹤0.01% |
14,500
-6,400
| -31% | -$14.5K |
|
6331
York Water
YORW
$502M
| $31K | ﹤0.01% |
+974
| New | +$34.7K |
|
|
SPYB
6332
DELISTED
Tradr 2X Long SPY Weekly ETF
SPYB
| $31K | ﹤0.01% |
+1,200
| New | +$32.2K |
|
|
PSTX
6333
CALL
DELISTED
Poseida Therapeutics, Inc. Common Stock
PSTX
| $31K | ﹤0.01% |
13,900
-10,100
| -42% | -$52.7K |
|
6334
PUT
ADT
ADT
$5.58B
| $30K | ﹤0.01% |
4,400
-59,000
| -93% | -$430K |
|
6335
PUT
Alignment Healthcare
ALHC
$3.08B
| $30K | ﹤0.01% |
+2,700
| New | +$31.6K |
|
6336
CALL
AXT Inc
AXTI
$3.95B
| $30K | ﹤0.01% |
13,900
-23,300
| -63% | -$52.9K |
|
6337
PUT
Bread Financial
BFH
$4.37B
| $30K | ﹤0.01% |
500
-59,300
| -99% | -$3.35M |
|
6338
CALL
Brixmor Property Group
BRX
$9.67B
| $30K | ﹤0.01% |
1,100
-4,500
| -80% | -$128K |
|
6339
PUT
Ceragon Networks
CRNT
$197M
| $30K | ﹤0.01% |
6,500
+5,500
| +550% | +$18.5K |
|
6340
PUT
Evolution Petroleum
EPM
$132M
| $30K | ﹤0.01% |
5,800
+3,100
| +115% | +$17K |
|
6341
Fox Factory Holding Corp
FOXF
$755M
| $30K | ﹤0.01% |
1,008
+496
| +97% | +$17.1K |
|
6342
CALL
Gladstone Investment Corp
GAIN
$643M
| $30K | ﹤0.01% |
2,300
-1,800
| -44% | -$24.6K |
|
|
XRN
6343
PUT
Chiron Real Estate Inc
XRN
$514M
| $30K | ﹤0.01% |
780
-2,040
| -72% | -$90.3K |
|
6344
PUT
GrowGeneration
GRWG
$86.5M
| $30K | ﹤0.01% |
17,800
+5,000
| +39% | +$9.57K |
|
|
GTY
6345
PUT
Getty Realty Corp
GTY
$2.11B
| $30K | ﹤0.01% |
+1,000
| New | +$31.7K |
|
6346
CALL
Highwoods Properties
HIW
$3.65B
| $30K | ﹤0.01% |
1,000
-4,500
| -82% | -$147K |
|
6347
Horizon Technology Finance
HRZN
$295M
| $30K | ﹤0.01% |
3,365
-634
| -16% | -$6.09K |
|
6348
CALL
IDEAYA Biosciences
IDYA
$3.42B
| $30K | ﹤0.01% |
1,200
-2,600
| -68% | -$73.6K |
|
6349
PUT
IMAX
IMAX
$2.62B
| $30K | ﹤0.01% |
1,200
-6,800
| -85% | -$160K |
|
6350
PUT
Immunic
IMUX
$190M
| $30K | ﹤0.01% |
3,000
-1,640
| -35% | -$20.7K |
|
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.