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 | |
|---|---|---|---|---|---|---|
1126
CALL
Fluor
FLR
$7.44B
| $6.57M | ﹤0.01% |
183,500
-191,700
| -51% | -$8.28M |
|
1127
PUT
Match Group
MTCH
$8.72B
| $6.56M | ﹤0.01% |
210,400
+22,100
| +12% | +$722K |
|
1128
PUT
EPAM Systems
EPAM
$4.5B
| $6.55M | ﹤0.01% |
38,800
+10,500
| +37% | +$2.32M |
|
1129
PUT
Gartner
IT
$8.95B
| $6.55M | ﹤0.01% |
+15,600
| New | +$7.69M |
|
1130
PUT
Ventas
VTR
$47.6B
| $6.54M | ﹤0.01% |
95,200
+200
| +0.2% | +$12.8K |
|
1131
Canadian Pacific Kansas City
CP
$82B
| $6.54M | ﹤0.01% |
93,219
+32,650
| +54% | +$2.48M |
|
1132
CALL
Vanguard FTSE Europe ETF
VGK
$29.8B
| $6.53M | ﹤0.01% |
111,700
+72,400
| +184% | +$4.99M |
|
1133
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$1.37B
| $6.53M | ﹤0.01% |
+245,737
| New | +$6.51M |
|
1134
Direxion Daily FTSE China Bear 3X ETF
YANG
$87.6M
| $6.52M | ﹤0.01% |
164,639
+157,240
| +2,125% | +$8.12M |
|
1135
Crown Castle
CCI
$32.5B
| $6.52M | ﹤0.01% |
+62,532
| New | +$5.84M |
|
1136
PUT
HF Sinclair
DINO
$16.1B
| $6.52M | ﹤0.01% |
198,200
+68,400
| +53% | +$2.4M |
|
|
LAZR
1137
CALL
DELISTED
Luminar Technologies
LAZR
| $6.51M | ﹤0.01% |
1,208,200
+69,300
| +6% | +$419K |
|
1138
CALL
Ball Corp
BALL
$16.6B
| $6.51M | ﹤0.01% |
125,000
+49,200
| +65% | +$2.58M |
|
1139
PUT
Steel Dynamics
STLD
$34.7B
| $6.49M | ﹤0.01% |
51,900
-23,200
| -31% | -$2.94M |
|
1140
CALL
Scotiabank
BNS
$106B
| $6.47M | ﹤0.01% |
136,400
+67,100
| +97% | +$3.37M |
|
1141
PUT
Elastic
ESTC
$5.96B
| $6.47M | ﹤0.01% |
72,600
-12,900
| -15% | -$1.34M |
|
1142
CALL
Telephone and Data Systems
TDS
$3.83B
| $6.46M | ﹤0.01% |
166,700
+98,400
| +144% | +$3.54M |
|
|
ECHO
1143
PUT
EchoStar
ECHO
$26.5B
| $6.45M | ﹤0.01% |
252,300
-3,700
| -1% | -$101K |
|
1144
PUT
Quantum Computing Inc
QUBT
$1.77B
| $6.45M | ﹤0.01% |
806,400
+198,600
| +33% | +$1.75M |
|
1145
CALL
Tyson Foods
TSN
$20B
| $6.45M | ﹤0.01% |
101,100
-36,400
| -26% | -$2.14M |
|
1146
Twilio
TWLO
$28.1B
| $6.45M | ﹤0.01% |
65,891
-55,657
| -46% | -$6.6M |
|
1147
PUT
First Majestic Silver
AG
$8.12B
| $6.45M | ﹤0.01% |
963,700
+13,700
| +1% | +$81.6K |
|
1148
PUT
Fox Class B
FOX
$20.7B
| $6.43M | ﹤0.01% |
113,700
+101,900
| +864% | +$5.06M |
|
1149
PUT
Matador Resources
MTDR
$6.42B
| $6.43M | ﹤0.01% |
125,800
+59,500
| +90% | +$3.29M |
|
1150
PUT
UGI
UGI
$7.92B
| $6.42M | ﹤0.01% |
194,100
+73,000
| +60% | +$2.31M |
|
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.