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 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$272M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$99M |
| 3 |
NVIDIA
NVDA
|
+$89.9M |
| 4 |
TSMC
TSM
|
+$87.7M |
| 5 |
Amazon
AMZN
|
+$61M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$518M |
| 2 |
Strategy Inc
MSTR
|
+$81.2M |
| 3 |
Alibaba
BABA
|
+$66.7M |
| 4 |
Advanced Micro Devices
AMD
|
+$44.3M |
| 5 |
Uber
UBER
|
+$41.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Consumer Discretionary | 0.22% |
| 3 | Healthcare | 0.17% |
| 4 | Communication Services | 0.15% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1151
PUT
SolarEdge
SEDG
$2.75B
| $6.41M | ﹤0.01% |
396,000
-14,700
| -4% | -$229K |
|
1152
Teva Pharmaceuticals
TEVA
$36.3B
| $6.41M | ﹤0.01% |
+416,763
| New | +$7.44M |
|
1153
CALL
TG Therapeutics
TGTX
$8.5B
| $6.38M | ﹤0.01% |
161,900
-51,900
| -24% | -$1.75M |
|
1154
CALL
Bitdeer Technologies
BTDR
$2.96B
| $6.36M | ﹤0.01% |
720,500
+64,600
| +10% | +$965K |
|
1155
PUT
Cintas
CTAS
$81.3B
| $6.35M | ﹤0.01% |
30,900
-2,300
| -7% | -$458K |
|
1156
PUT
Bank OZK
OZK
$5.47B
| $6.35M | ﹤0.01% |
146,100
-87,000
| -37% | -$4.12M |
|
1157
PUT
Wheaton Precious Metals
WPM
$50B
| $6.34M | ﹤0.01% |
81,700
+5,800
| +8% | +$387K |
|
1158
CALL
Jabil
JBL
$33.7B
| $6.31M | ﹤0.01% |
46,400
-23,800
| -34% | -$3.66M |
|
1159
PUT
Ecolab
ECL
$74.1B
| $6.31M | ﹤0.01% |
24,900
+19,800
| +388% | +$4.99M |
|
|
CMA
1160
PUT
DELISTED
Comerica
CMA
| $6.31M | ﹤0.01% |
106,800
-18,700
| -15% | -$1.17M |
|
1161
CALL
Oscar Health
OSCR
$8.72B
| $6.3M | ﹤0.01% |
480,500
-129,300
| -21% | -$1.92M |
|
1162
CALL
TC Energy
TRP
$72.9B
| $6.28M | ﹤0.01% |
133,000
-108,300
| -45% | -$5.05M |
|
1163
CALL
Blue Owl Capital
OWL
$6.22B
| $6.26M | ﹤0.01% |
312,500
+57,500
| +23% | +$1.29M |
|
1164
PUT
Albertsons Companies
ACI
$5.6B
| $6.25M | ﹤0.01% |
284,300
+152,000
| +115% | +$3.14M |
|
1165
PUT
JetBlue
JBLU
$1.86B
| $6.23M | ﹤0.01% |
1,293,100
-140,000
| -10% | -$920K |
|
1166
PUT
Novartis
NVS
$297B
| $6.21M | ﹤0.01% |
55,800
-60,500
| -52% | -$6.44M |
|
1167
CALL
Monolithic Power Systems
MPWR
$68.6B
| $6.21M | ﹤0.01% |
10,700
+1,500
| +16% | +$945K |
|
1168
Zscaler
ZS
$22.6B
| $6.2M | ﹤0.01% |
+31,247
| New | +$6.23M |
|
1169
PUT
IQVIA
IQV
$34.6B
| $6.19M | ﹤0.01% |
35,100
+23,500
| +203% | +$4.56M |
|
1170
State Street Materials Select Sector SPDR ETF
XLB
$8.35B
| $6.18M | ﹤0.01% |
143,890
-57,860
| -29% | -$2.53M |
|
1171
CALL
Kohl's
KSS
$2.06B
| $6.17M | ﹤0.01% |
754,500
+540,300
| +252% | +$6.27M |
|
1172
CALL
Valaris
VAL
$5.48B
| $6.17M | ﹤0.01% |
157,200
+81,200
| +107% | +$3.48M |
|
1173
PUT
Shift4
FOUR
$3.68B
| $6.17M | ﹤0.01% |
75,500
+7,100
| +10% | +$732K |
|
1174
PUT
Gold Fields
GFI
$28.9B
| $6.14M | ﹤0.01% |
278,100
-83,900
| -23% | -$1.53M |
|
1175
CALL
Brinker International
EAT
$7.93B
| $6.13M | ﹤0.01% |
41,100
+2,900
| +8% | +$446K |
|
Similar funds
Simplex Trading's Q1 2025 Portfolio in Review
As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.
- Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
- Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
- Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
- Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
- Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
- Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
- Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.