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 | |
|---|---|---|---|---|---|---|
|
BHR
5351
Braemar Hotels & Resorts
BHR
$156M
| $76K | ﹤0.01% |
30,624
+30,277
| +8,725% | +$82.6K |
|
5352
CALL
Cardlytics
CDLX
$21.7M
| $76K | ﹤0.01% |
4,230
-7,790
| -65% | -$223K |
|
5353
PUT
Cognyte Software
CGNT
$659M
| $76K | ﹤0.01% |
9,800
+3,600
| +58% | +$32.8K |
|
5354
iShares GSCI Commodity Dynamic Roll Strategy ETF
COMT
$1.18B
| $76K | ﹤0.01% |
2,880
+450
| +19% | +$11.7K |
|
5355
PUT
First Bancorp
FBP
$4.42B
| $76K | ﹤0.01% |
+4,000
| New | +$77.7K |
|
5356
CALL
Flex
FLEX
$41.7B
| $76K | ﹤0.01% |
2,300
-89,100
| -97% | -$3.49M |
|
|
5357
Flex
FLEX
$41.7B
| $76K | ﹤0.01% |
+2,326
| New | +$91.1K |
|
5358
iShares Floating Rate Bond ETF
FLOT
$10.2B
| $76K | ﹤0.01% |
+1,500
| New | +$76.5K |
|
5359
Fomento Económico Mexicano
FMX
$43.6B
| $76K | ﹤0.01% |
783
+65
| +9% | +$5.88K |
|
|
GRFS
5360
CALL
Grifois
GRFS
$5.36B
| $76K | ﹤0.01% |
10,800
-9,200
| -46% | -$69.4K |
|
5361
CALL
Goldman Sachs ActiveBeta International Equity ETF
GSIE
$6B
| $76K | ﹤0.01% |
+1,000
| New | +$35.3K |
|
5362
Kopin
KOPN
$652M
| $76K | ﹤0.01% |
81,681
+57,001
| +231% | +$83.8K |
|
5363
Post Holdings
POST
$4.14B
| $76K | ﹤0.01% |
654
+386
| +144% | +$42.8K |
|
5364
CALL
PRA Group
PRAA
$663M
| $76K | ﹤0.01% |
3,700
+1,000
| +37% | +$21.2K |
|
5365
PUT
Sinclair Inc
SBGI
$992M
| $76K | ﹤0.01% |
4,800
-15,300
| -76% | -$232K |
|
|
TMQ
5366
CALL
Trilogy Metals
TMQ
$541M
| $76K | ﹤0.01% |
+49,300
| New | +$68K |
|
|
TE
5367
CALL
T1 Energy
TE
$1.16B
| $76K | ﹤0.01% |
60,400
-228,400
| -79% | -$421K |
|
5368
Ardmore Shipping
ASC
$710M
| $75K | ﹤0.01% |
7,683
-52,256
| -87% | -$571K |
|
5369
PUT
Corporacion America
CAAP
$4.21B
| $75K | ﹤0.01% |
4,100
+2,700
| +193% | +$51K |
|
5370
Central Garden & Pet Co
CENT
$2.69B
| $75K | ﹤0.01% |
2,048
-419
| -17% | -$15.3K |
|
5371
Emergent Biosolutions
EBS
$373M
| $75K | ﹤0.01% |
+15,540
| New | +$129K |
|
5372
PUT
Evolus
EOLS
$385M
| $75K | ﹤0.01% |
6,300
+4,100
| +186% | +$53.6K |
|
5373
FirstCash
FCFS
$8.85B
| $75K | ﹤0.01% |
626
-14,351
| -96% | -$1.63M |
|
5374
CALL
Graco
GGG
$12.9B
| $75K | ﹤0.01% |
900
+700
| +350% | +$59.2K |
|
5375
CALL
Granite Construction
GVA
$5.29B
| $75K | ﹤0.01% |
1,000
-200
| -17% | -$16.7K |
|
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.