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 | |
|---|---|---|---|---|---|---|
4151
CALL
Teledyne Technologies
TDY
$30.1B
| $278K | ﹤0.01% |
600
+500
| +500% | +$233K |
|
4152
PUT
Diodes
DIOD
$3.69B
| $277K | ﹤0.01% |
4,500
+300
| +7% | +$18.7K |
|
|
EVRI
4153
PUT
DELISTED
Everi Holdings
EVRI
| $276K | ﹤0.01% |
20,500
-100
| -0.5% | -$1.34K |
|
4154
CALL
Henry Schein
HSIC
$9.76B
| $276K | ﹤0.01% |
4,000
-43,300
| -92% | -$3.11M |
|
4155
Lantronix
LTRX
$238M
| $276K | ﹤0.01% |
67,082
+46,267
| +222% | +$165K |
|
4156
CALL
Medifast
MED
$108M
| $276K | ﹤0.01% |
15,700
-900
| -5% | -$16.7K |
|
4157
CALL
Ocean Power Technologies
OPTT
$40.6M
| $276K | ﹤0.01% |
270,900
+243,100
| +874% | +$60.9K |
|
4158
PUT
AMN Healthcare
AMN
$1.35B
| $275K | ﹤0.01% |
11,500
+6,700
| +140% | +$213K |
|
4159
PUT
Ryan Specialty Holdings
RYAN
$5.96B
| $275K | ﹤0.01% |
4,300
+3,200
| +291% | +$223K |
|
|
TMHC
4160
CALL
DELISTED
Taylor Morrison
TMHC
| $275K | ﹤0.01% |
4,500
+2,800
| +165% | +$191K |
|
4161
CALL
American Battery Technology Co
ABAT
$297M
| $274K | ﹤0.01% |
111,600
+100,600
| +915% | +$113K |
|
4162
PUT
Rhythm Pharmaceuticals
RYTM
$7.41B
| $274K | ﹤0.01% |
4,900
-1,100
| -18% | -$60.8K |
|
|
AZPN
4163
PUT
DELISTED
Aspen Technology Inc
AZPN
| $274K | ﹤0.01% |
1,100
+1,000
| +1,000% | +$244K |
|
4164
Cars.com
CARS
$705M
| $273K | ﹤0.01% |
15,762
+11,760
| +294% | +$206K |
|
4165
CALL
Daktronics
DAKT
$953M
| $273K | ﹤0.01% |
16,200
-5,700
| -26% | -$86K |
|
4166
DXP Enterprises
DXPE
$2.49B
| $273K | ﹤0.01% |
3,305
+2,374
| +255% | +$156K |
|
4167
CALL
Insight Enterprises
NSIT
$3.77B
| $273K | ﹤0.01% |
1,800
-100
| -5% | -$17.9K |
|
|
TGNA
4168
DELISTED
TEGNA Inc
TGNA
| $273K | ﹤0.01% |
+14,962
| New | +$262K |
|
4169
CALL
Adeia
ADEA
$2.77B
| $272K | ﹤0.01% |
19,500
-11,600
| -37% | -$147K |
|
4170
CALL
Bloomin' Brands
BLMN
$736M
| $272K | ﹤0.01% |
22,300
-39,000
| -64% | -$559K |
|
4171
PUT
Concentrix
CNXC
$1.55B
| $272K | ﹤0.01% |
6,300
-21,800
| -78% | -$970K |
|
4172
CALL
Equity Residential
EQR
$25.5B
| $272K | ﹤0.01% |
3,800
-39,800
| -91% | -$2.92M |
|
4173
Elbit Systems
ESLT
$38.4B
| $272K | ﹤0.01% |
1,056
+1,049
| +14,986% | +$246K |
|
4174
PUT
Qfin Holdings
QFIN
$1.66B
| $272K | ﹤0.01% |
7,100
-38,200
| -84% | -$1.32M |
|
4175
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$426M
| $272K | ﹤0.01% |
9,400
-17,800
| -65% | -$526K |
|
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.