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 | |
|---|---|---|---|---|---|---|
5201
PUT
Hartford Financial Services
HIG
$38.9B
| $86K | ﹤0.01% |
700
+100
| +17% | +$11.5K |
|
5202
Home BancShares
HOMB
$6.23B
| $86K | ﹤0.01% |
3,054
-372
| -11% | -$10.9K |
|
5203
Janux Therapeutics
JANX
$925M
| $86K | ﹤0.01% |
+3,187
| New | +$120K |
|
5204
CALL
LSB Industries
LXU
$783M
| $86K | ﹤0.01% |
13,200
-58,200
| -82% | -$454K |
|
5205
N-able
NABL
$882M
| $86K | ﹤0.01% |
+12,175
| New | +$108K |
|
5206
CALL
Nurix Therapeutics
NRIX
$2.41B
| $86K | ﹤0.01% |
7,300
-39,100
| -84% | -$654K |
|
5207
Pegasystems
PEGA
$5.02B
| $86K | ﹤0.01% |
2,484
-1,864
| -43% | -$82.4K |
|
5208
PUT
Schrodinger
SDGR
$1.13B
| $86K | ﹤0.01% |
4,400
-12,500
| -74% | -$281K |
|
5209
PUT
Titan International
TWI
$466M
| $86K | ﹤0.01% |
+10,300
| New | +$85.2K |
|
5210
PUT
Zai Lab
ZLAB
$2.06B
| $86K | ﹤0.01% |
2,400
+1,700
| +243% | +$52.3K |
|
5211
Barings BDC
BBDC
$864M
| $85K | ﹤0.01% |
+9,008
| New | +$88.8K |
|
5212
CALL
BJ's Restaurants
BJRI
$1.42B
| $85K | ﹤0.01% |
2,500
-300
| -11% | -$10.6K |
|
5213
BlackLine
BL
$1.84B
| $85K | ﹤0.01% |
+1,774
| New | +$97.1K |
|
5214
PUT
Blink Charging
BLNK
$74.3M
| $85K | ﹤0.01% |
93,000
-60,600
| -39% | -$70.1K |
|
5215
Corvus Pharmaceuticals
CRVS
$1.12B
| $85K | ﹤0.01% |
26,990
-112,943
| -81% | -$532K |
|
5216
CALL
Crexendo
CXDO
$223M
| $85K | ﹤0.01% |
17,600
+12,300
| +232% | +$72.2K |
|
5217
CALL
Fortrea Holdings
FTRE
$1.82B
| $85K | ﹤0.01% |
11,300
-45,400
| -80% | -$641K |
|
5218
Hawaiian Electric Industries
HE
$2.23B
| $85K | ﹤0.01% |
7,764
-106,485
| -93% | -$1.08M |
|
5219
International Seaways
INSW
$4.76B
| $85K | ﹤0.01% |
2,575
-5,990
| -70% | -$219K |
|
5220
Innoviz Technologies
INVZ
$95M
| $85K | ﹤0.01% |
130,881
-105,304
| -45% | -$122K |
|
5221
CALL
Matrix Service
MTRX
$326M
| $85K | ﹤0.01% |
+6,900
| New | +$92.4K |
|
5222
Old National Bancorp
ONB
$10.2B
| $85K | ﹤0.01% |
4,013
-9,230
| -70% | -$208K |
|
5223
CALL
OptimizeRx
OPRX
$114M
| $85K | ﹤0.01% |
9,900
+6,600
| +200% | +$40.3K |
|
5224
CALL
Primerica
PRI
$9.98B
| $85K | ﹤0.01% |
300
+100
| +50% | +$28.5K |
|
5225
Tradr 2X Long Innovation ETFShort Innovation Daily ETF
SARK
$44.6M
| $85K | ﹤0.01% |
1,649
-3,262
| -66% | -$130K |
|
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.