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 | |
|---|---|---|---|---|---|---|
1151
PUT
Peabody Energy
BTU
$2.9B
| $8.26M | ﹤0.01% |
394,600
-457,100
| -54% | -$11.3M |
|
1152
CALL
Illumina
ILMN
$29.8B
| $8.21M | ﹤0.01% |
72,900
-400
| -0.5% | -$57K |
|
1153
CALL
McKesson
MCK
$96.5B
| $8.21M | ﹤0.01% |
14,400
-73,500
| -84% | -$41.2M |
|
1154
CALL
Oscar Health
OSCR
$8.72B
| $8.2M | ﹤0.01% |
609,800
+446,000
| +272% | +$7.18M |
|
1155
CALL
Tenet Healthcare
THC
$17.1B
| $8.19M | ﹤0.01% |
64,900
-70,300
| -52% | -$10.5M |
|
1156
PUT
Truist Financial
TFC
$62.5B
| $8.19M | ﹤0.01% |
188,700
-126,200
| -40% | -$5.63M |
|
|
EXAS
1157
CALL
DELISTED
Exact Sciences
EXAS
| $8.18M | ﹤0.01% |
145,600
-57,600
| -28% | -$3.58M |
|
1158
PUT
Veeva Systems
VEEV
$29.2B
| $8.18M | ﹤0.01% |
38,900
-18,900
| -33% | -$4.16M |
|
1159
CALL
Lumen
LUMN
$6.73B
| $8.17M | ﹤0.01% |
1,538,200
-30,400
| -2% | -$210K |
|
1160
CALL
NuScale Power
SMR
$3.05B
| $8.17M | ﹤0.01% |
455,500
+169,300
| +59% | +$3.49M |
|
1161
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $8.16M | ﹤0.01% |
139,200
+82,700
| +146% | +$5.01M |
|
1162
CALL
BigBear.ai
BBAI
$1.37B
| $8.14M | ﹤0.01% |
1,829,500
+1,029,000
| +129% | +$2.33M |
|
1163
PUT
Avis
CAR
$5.62B
| $8.12M | ﹤0.01% |
100,700
+25,900
| +35% | +$2.36M |
|
1164
PUT
HSBC
HSBC
$349B
| $8.12M | ﹤0.01% |
164,100
-68,900
| -30% | -$3.2M |
|
1165
PUT
Archer Aviation
ACHR
$3.9B
| $8.11M | ﹤0.01% |
831,600
+625,600
| +304% | +$3.48M |
|
1166
CALL
PBF Energy
PBF
$7.33B
| $8.07M | ﹤0.01% |
304,100
+210,700
| +226% | +$6.41M |
|
1167
CALL
Seagate
STX
$207B
| $8.07M | ﹤0.01% |
93,500
-61,400
| -40% | -$6.18M |
|
1168
CALL
AES
AES
$10.6B
| $8.06M | ﹤0.01% |
626,600
+340,700
| +119% | +$5.09M |
|
1169
CALL
Whirlpool
WHR
$2.31B
| $8.05M | ﹤0.01% |
70,300
-14,400
| -17% | -$1.59M |
|
1170
Trane Technologies
TT
$106B
| $8.04M | ﹤0.01% |
21,761
+1,130
| +5% | +$449K |
|
1171
CALL
Agilent Technologies
A
$39.5B
| $8.02M | ﹤0.01% |
59,700
+36,600
| +158% | +$5.01M |
|
1172
Direxion Daily FTSE China Bull 3X ETF
YINN
$654M
| $8.01M | ﹤0.01% |
286,661
+35,484
| +14% | +$1.16M |
|
1173
PUT
Becton Dickinson
BDX
$42.1B
| $8.01M | ﹤0.01% |
35,300
+700
| +2% | +$162K |
|
1174
Global Payments
GPN
$21.3B
| $8M | ﹤0.01% |
71,391
+27,446
| +62% | +$3M |
|
1175
PUT
Axos Financial
AX
$5.42B
| $7.98M | ﹤0.01% |
114,200
-20,600
| -15% | -$1.5M |
|
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.