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 | |
|---|---|---|---|---|---|---|
1776
Sportradar
SRAD
$4.23B
| $2.65M | ﹤0.01% |
122,431
+110,693
| +943% | +$2.31M |
|
1777
PUT
AMC Entertainment Holdings
AMC
$2.03B
| $2.64M | ﹤0.01% |
921,300
-3,586,800
| -80% | -$11.8M |
|
|
AKRO
1778
CALL
DELISTED
Akero Therapeutics
AKRO
| $2.63M | ﹤0.01% |
65,100
+16,000
| +33% | +$678K |
|
1779
PUT
Agilent Technologies
A
$39.1B
| $2.63M | ﹤0.01% |
22,500
-5,200
| -19% | -$701K |
|
1780
CALL
GigaCloud Technology
GCT
$1.35B
| $2.63M | ﹤0.01% |
185,200
+78,900
| +74% | +$1.44M |
|
1781
PUT
TE Connectivity
TEL
$58.8B
| $2.63M | ﹤0.01% |
18,600
+15,900
| +589% | +$2.35M |
|
1782
CALL
W.P. Carey
WPC
$17.1B
| $2.62M | ﹤0.01% |
41,800
-10,700
| -20% | -$633K |
|
|
ARI
1783
PUT
Apollo Commercial Real Estate
ARI
$887M
| $2.62M | ﹤0.01% |
273,400
+268,700
| +5,717% | +$2.55M |
|
1784
PUT
Comstock Resources
CRK
$3.97B
| $2.62M | ﹤0.01% |
128,600
+29,000
| +29% | +$556K |
|
1785
PUT
Enlight Renewable Energy
ENLT
$12.2B
| $2.61M | ﹤0.01% |
161,700
| – | – |
|
1786
QuantumScape Corp
QS
$3B
| $2.61M | ﹤0.01% |
627,249
-276,694
| -31% | -$1.37M |
|
1787
PUT
PagerDuty
PD
$700M
| $2.61M | ﹤0.01% |
142,800
+22,400
| +19% | +$411K |
|
1788
PUT
Ralph Lauren
RL
$22.2B
| $2.6M | ﹤0.01% |
11,800
-15,200
| -56% | -$3.77M |
|
1789
CALL
Parsons
PSN
$6.28B
| $2.6M | ﹤0.01% |
43,900
+18,500
| +73% | +$1.34M |
|
1790
Banc of California
BANC
$3.28B
| $2.6M | ﹤0.01% |
+183,055
| New | +$2.77M |
|
1791
PUT
WIX.com
WIX
$2.15B
| $2.6M | ﹤0.01% |
15,900
-16,300
| -51% | -$3.39M |
|
1792
CALL
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $2.6M | ﹤0.01% |
17,800
-13,100
| -42% | -$818K |
|
1793
CALL
Oxford Industries
OXM
$577M
| $2.59M | ﹤0.01% |
44,200
+44,000
| +22,000% | +$3.16M |
|
1794
Direxion Daily TSLA Bull 2X ETF
TSLL
$2.44B
| $2.59M | ﹤0.01% |
272,379
-192,755
| -41% | -$3.56M |
|
|
1795
Enlight Renewable Energy
ENLT
$12.2B
| $2.59M | ﹤0.01% |
160,319
-3,289
| -2% | -$55.1K |
|
1796
PUT
Jackson Financial
JXN
$8.32B
| $2.59M | ﹤0.01% |
30,900
-3,000
| -9% | -$266K |
|
1797
PUT
United Natural Foods
UNFI
$3.01B
| $2.59M | ﹤0.01% |
94,500
+7,000
| +8% | +$203K |
|
1798
PUT
EPR Properties
EPR
$4.86B
| $2.58M | ﹤0.01% |
49,100
-11,600
| -19% | -$569K |
|
1799
CALL
Polaris
PII
$4.15B
| $2.58M | ﹤0.01% |
63,100
+59,300
| +1,561% | +$2.82M |
|
1800
PUT
Cboe Global Markets
CBOE
$29.8B
| $2.58M | ﹤0.01% |
11,400
-16,800
| -60% | -$3.48M |
|
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.