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 |
Amazon
AMZN
|
+$168M |
| 2 |
NVIDIA
NVDA
|
+$141M |
| 3 |
TSMC
TSM
|
+$121M |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$174M |
| 2 |
Western Digital
WDC
|
+$87.7M |
| 3 |
Broadcom
AVGO
|
+$62.2M |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.62% |
| 2 | Communication Services | 0.22% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Healthcare | 0.2% |
| 5 | Industrials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5076
Algonquin Power & Utilities
AQN
$4.69B
| $101K | ﹤0.01% |
16,428
-140,927
| -90% | -$914K |
|
5077
PUT
Newell Brands
NWL
$2.16B
| $101K | ﹤0.01% |
29,400
-25,600
| -47% | -$108K |
|
|
PLG
5078
Platinum Group Metals
PLG
$164M
| $101K | ﹤0.01% |
56,925
+29,836
| +110% | +$72.2K |
|
5079
Loar Holdings
LOAR
$6.64B
| $101K | ﹤0.01% |
1,758
+775
| +79% | +$52.3K |
|
5080
FTAI Infrastructure
FIP
$500M
| $101K | ﹤0.01% |
20,385
-150,570
| -88% | -$843K |
|
5081
PUT
WillScot Mobile Mini Holdings
WSC
$4.8B
| $101K | ﹤0.01% |
5,800
-800
| -12% | -$16.3K |
|
|
AUTL
5082
CALL
Autolus Therapeutics
AUTL
$386M
| $101K | ﹤0.01% |
72,900
+57,800
| +383% | +$87.8K |
|
5083
CALL
TETRA Technologies
TTI
$1.23B
| $101K | ﹤0.01% |
11,800
-170,500
| -94% | -$1.71M |
|
|
DYNC
5084
CALL
Dynamix Corp
DYNC
$239M
| $101K | ﹤0.01% |
9,600
-12,400
| -56% | -$129K |
|
5085
Idacorp
IDA
$8.23B
| $100K | ﹤0.01% |
702
-2,847
| -80% | -$390K |
|
|
CWBC
5086
PUT
Community West Bancshares
CWBC
$678M
| $100K | ﹤0.01% |
+4,300
| New | +$101K |
|
5087
Madison Square Garden
MSGE
$3.61B
| $100K | ﹤0.01% |
+1,699
| New | +$100K |
|
5088
CALL
Carlisle Companies
CSL
$13.6B
| $100K | ﹤0.01% |
+300
| New | +$109K |
|
5089
iShares Core MSCI Total International Stock ETF
IXUS
$57.5B
| $100K | ﹤0.01% |
1,155
+988
| +592% | +$88K |
|
5090
Neogen
NEOG
$2.05B
| $100K | ﹤0.01% |
+10,767
| New | +$106K |
|
|
ESPR
5091
DELISTED
Esperion Therapeutics
ESPR
| $99.9K | ﹤0.01% |
+36,467
| New | +$115K |
|
5092
CALL
Ligand Pharmaceuticals
LGND
$6.02B
| $99.8K | ﹤0.01% |
+500
| New | +$98.9K |
|
|
AIRO
5093
AIRO Group Holdings
AIRO
$214M
| $99.6K | ﹤0.01% |
13,098
+12,310
| +1,562% | +$128K |
|
5094
PUT
Brookfield Renewable
BEPC
$6.12B
| $99.6K | ﹤0.01% |
2,500
+200
| +9% | +$8.15K |
|
5095
PUT
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $99.5K | ﹤0.01% |
600
-9,800
| -94% | -$623K |
|
5096
CALL
RPM International
RPM
$13.7B
| $99.4K | ﹤0.01% |
1,000
+600
| +150% | +$64.8K |
|
5097
ARKO Corp
ARKO
$890M
| $99.4K | ﹤0.01% |
17,876
+9,883
| +124% | +$55.1K |
|
5098
CALL
Spire Global
SPIR
$425M
| $99.4K | ﹤0.01% |
7,900
-14,000
| -64% | -$150K |
|
|
XRN
5099
PUT
Chiron Real Estate Inc
XRN
$544M
| $99.2K | ﹤0.01% |
3,000
-42,300
| -93% | -$1.49M |
|
5100
Alta Equipment Group
ALTG
$210M
| $99.2K | ﹤0.01% |
18,472
-11,561
| -38% | -$73.4K |
|
Similar funds
Simplex Trading's Q1 2026 Portfolio in Review
As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amazon worth $159M.
- Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
- Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
- Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
- Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
- Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
- Simplex Trading opened 2,156 new positions and closed 1,574 in Q1 2026.
- Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.