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 | |
|---|---|---|---|---|---|---|
6201
Astrana Health
ASTH
$1.81B
| $32K | ﹤0.01% |
1,063
-3,502
| -77% | -$117K |
|
|
LAR
6202
Lithium Argentina AG
LAR
$906M
| $32K | ﹤0.01% |
15,327
-48,728
| -76% | -$123K |
|
6203
CALL
Ameresco
AMRC
$980M
| $31K | ﹤0.01% |
+2,600
| New | +$47.1K |
|
6204
PUT
America Movil
AMX
$74.6B
| $31K | ﹤0.01% |
2,200
+600
| +38% | +$8.6K |
|
|
BHR
6205
PUT
Braemar Hotels & Resorts
BHR
$163M
| $31K | ﹤0.01% |
+12,700
| New | +$34.7K |
|
6206
PUT
BOK Financial
BOKF
$8.58B
| $31K | ﹤0.01% |
+300
| New | +$32.2K |
|
6207
Corbus Pharmaceuticals
CRBP
$165M
| $31K | ﹤0.01% |
5,873
+4,974
| +553% | +$43.9K |
|
6208
Dakota Gold
DC
$617M
| $31K | ﹤0.01% |
+11,889
| New | +$32.6K |
|
|
DMC
6209
Del Monte Corp
DMC
$1.42B
| $31K | ﹤0.01% |
1,006
-792
| -44% | -$24.3K |
|
6210
CALL
Fortis
FTS
$29.3B
| $31K | ﹤0.01% |
+700
| New | +$30.4K |
|
6211
Monte Rosa Therapeutics
GLUE
$1.82B
| $31K | ﹤0.01% |
+6,756
| New | +$41.4K |
|
6212
CALL
Genmab
GMAB
$17.5B
| $31K | ﹤0.01% |
1,600
-4,300
| -73% | -$90.2K |
|
6213
PUT
Insteel Industries
IIIN
$592M
| $31K | ﹤0.01% |
+1,200
| New | +$33.3K |
|
|
LADR
6214
CALL
Ladder Capital
LADR
$1.24B
| $31K | ﹤0.01% |
2,800
-3,300
| -54% | -$37.7K |
|
6215
CALL
Live Oak Bancshares
LOB
$1.98B
| $31K | ﹤0.01% |
1,200
+1,100
| +1,100% | +$36.6K |
|
6216
PUT
Larimar Therapeutics
LRMR
$377M
| $31K | ﹤0.01% |
14,700
+13,900
| +1,738% | +$43.9K |
|
6217
PUT
Mirum Pharmaceuticals
MIRM
$6.56B
| $31K | ﹤0.01% |
+700
| New | +$33K |
|
6218
Amplify Alternative Harvest ETF
MJ
$96.9M
| $31K | ﹤0.01% |
+1,594
| New | +$37.9K |
|
|
MURA
6219
DELISTED
Mural Oncology
MURA
| $31K | ﹤0.01% |
24,952
+24,276
| +3,591% | +$88.5K |
|
|
ORLA
6220
Orla Mining
ORLA
$3.36B
| $31K | ﹤0.01% |
3,394
-12,751
| -79% | -$90.6K |
|
6221
PUT
Par Pacific Holdings
PARR
$4.17B
| $31K | ﹤0.01% |
2,200
+1,400
| +175% | +$22K |
|
6222
Saia
SAIA
$10.5B
| $31K | ﹤0.01% |
+89
| New | +$38.7K |
|
6223
CALL
E.W. Scripps
SSP
$270M
| $31K | ﹤0.01% |
+10,800
| New | +$23.6K |
|
6224
CALL
Telos
TLS
$331M
| $31K | ﹤0.01% |
13,400
-29,100
| -68% | -$89.2K |
|
|
TRTX
6225
CALL
TPG RE Finance Trust
TRTX
$630M
| $31K | ﹤0.01% |
3,900
+1,400
| +56% | +$11.8K |
|
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.