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 | |
|---|---|---|---|---|---|---|
7201
CALL
Rogers Corp
ROG
$2.08B
| $10K | ﹤0.01% |
100
| – | – |
|
|
7202
PUT
Rogers Corp
ROG
$2.08B
| $10K | ﹤0.01% |
100
-100
| -50% | -$10.4K |
|
7203
PUT
RxSight
RXST
$254M
| $10K | ﹤0.01% |
300
+100
| +50% | +$4.51K |
|
7204
PUT
Surgery Partners
SGRY
$2.15B
| $10K | ﹤0.01% |
500
-1,000
| -67% | -$26.2K |
|
7205
Shenandoah Telecom
SHEN
$703M
| $10K | ﹤0.01% |
819
+760
| +1,288% | +$10.2K |
|
7206
ProShares Short High Yield
SJB
$51.9M
| $10K | ﹤0.01% |
643
-18
| -3% | -$294 |
|
7207
CALL
Skyward Specialty Insurance
SKWD
$2.53B
| $10K | ﹤0.01% |
200
+100
| +100% | +$4.86K |
|
7208
ProShares UltraShort Real Estate
SRS
$14.8M
| $10K | ﹤0.01% |
193
-400
| -67% | -$19K |
|
7209
TaskUs
TASK
$594M
| $10K | ﹤0.01% |
615
+557
| +960% | +$7.99K |
|
7210
Thryv Holdings
THRY
$184M
| $10K | ﹤0.01% |
679
+409
| +151% | +$6.45K |
|
7211
PUT
Tiptree Inc
TIPT
$694M
| $10K | ﹤0.01% |
500
-16,000
| -97% | -$335K |
|
|
TRML
7212
PUT
DELISTED
Tourmaline Bio
TRML
| $10K | ﹤0.01% |
500
+300
| +150% | +$7.55K |
|
|
TSE
7213
CALL
DELISTED
Trinseo
TSE
| $10K | ﹤0.01% |
2,100
+1,500
| +250% | +$7.4K |
|
|
TUYA
7214
Tuya Inc
TUYA
$1.04B
| $10K | ﹤0.01% |
5,999
-1,739
| -22% | -$2.92K |
|
7215
PUT
VistaGen Therapeutics
VTGN
$9.98M
| $10K | ﹤0.01% |
3,500
-34,500
| -91% | -$97.1K |
|
7216
WidePoint Corp
WYY
$97.4M
| $10K | ﹤0.01% |
+2,134
| New | +$9.22K |
|
7217
PUT
Ziff Davis
ZD
$2B
| $10K | ﹤0.01% |
200
-900
| -82% | -$47.2K |
|
|
ZYXI
7218
DELISTED
Zynex
ZYXI
| $10K | ﹤0.01% |
1,354
-9,776
| -88% | -$80.5K |
|
7219
GraniteShares 2x Long AMZN Daily ETF
AMZZ
$36.8M
| $10K | ﹤0.01% |
303
+215
| +244% | +$6.62K |
|
|
ATYR
7220
CALL
aTyr Pharma
ATYR
$47.4M
| $10K | ﹤0.01% |
+2,800
| New | +$8.48K |
|
|
SILA
7221
DELISTED
Sila Realty Trust
SILA
| $10K | ﹤0.01% |
+452
| New | +$11.4K |
|
|
LUCK
7222
PUT
Lucky Strike Entertainment
LUCK
$959M
| $10K | ﹤0.01% |
1,000
-2,000
| -67% | -$22.9K |
|
|
ONC
7223
CALL
BeOne Medicines Ltd
ONC
$33.9B
| $10K | ﹤0.01% |
1,900
-500
| -21% | -$102K |
|
|
VTNR
7224
CALL
DELISTED
Vertex Energy, Inc
VTNR
| $10K | ﹤0.01% |
300,800
-62,400
| -17% | -$6.65K |
|
|
SBDS
7225
PUT
DELISTED
Solo Brands Inc
SBDS
| $10K | ﹤0.01% |
235
-2,765
| -92% | -$137K |
|
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.