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 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
4801
Forrester Research
FORR
$215M
| $128K | ﹤0.01% |
+22,550
| New | +$154K |
2026 Q1
0 quarters
|
|
|
CNR
4802
Core Natural Resources Inc
CNR
$4.45B
| $128K | ﹤0.01% |
1,218
-2,100
| -63% | -$200K |
2025 Q4
1 quarter
|
|
4803
Simplify Short Term Treasury Futures Strategy ETF
TUA
$450M
| $127K | ﹤0.01% |
+6,041
| New | +$131K |
2026 Q1
0 quarters
|
|
4804
Direxion Daily 7-10 Year Treasury Bull 3X ETF
TYD
$25.8M
| $127K | ﹤0.01% |
+5,199
| New | +$132K |
2026 Q1
0 quarters
|
|
4805
CALL
Artisan Partners
APAM
$2.51B
| $127K | ﹤0.01% |
3,500
+2,900
| +483% | +$119K |
2019 Q2
27 quarters
|
|
4806
Ameriprise Financial
AMP
$43.3B
| $127K | ﹤0.01% |
286
+229
| +402% | +$110K |
2025 Q2
3 quarters
|
|
|
NAGE
4807
PUT
Niagen Bioscience
NAGE
$214M
| $127K | ﹤0.01% |
28,800
-7,800
| -21% | -$42.1K |
2024 Q1
8 quarters
|
|
4808
Sonic Automotive
SAH
$2.02B
| $127K | ﹤0.01% |
+1,851
| New | +$116K |
2026 Q1
0 quarters
|
|
|
SEMR
4809
DELISTED
Semrush
SEMR
| $127K | ﹤0.01% |
+10,612
| New | +$126K |
2026 Q1
0 quarters
|
|
4810
CALL
New Mountain Finance
NMFC
$654M
| $126K | ﹤0.01% |
+16,300
| New | +$136K |
2026 Q1
0 quarters
|
|
|
NMAX
4811
Newsmax Inc
NMAX
$1.24B
| $126K | ﹤0.01% |
24,161
+8,463
| +54% | +$57.1K |
2025 Q2
3 quarters
|
|
4812
PUT
FormFactor
FORM
$11.7B
| $126K | ﹤0.01% |
1,300
+1,200
| +1,200% | +$103K |
2024 Q4
5 quarters
|
|
4813
Abercrombie & Fitch
ANF
$5.79B
| $126K | ﹤0.01% |
1,379
-71,107
| -98% | -$6.91M |
2025 Q4
1 quarter
|
|
|
ALM
4814
PUT
Almonty Industries
ALM
$3.9B
| $126K | ﹤0.01% |
+8,700
| New | +$124K |
2026 Q1
0 quarters
|
|
4815
PUT
Dine Brands
DIN
$377M
| $126K | ﹤0.01% |
4,800
-18,000
| -79% | -$584K |
2018 Q1
32 quarters
|
|
4816
Nurix Therapeutics
NRIX
$2.4B
| $126K | ﹤0.01% |
8,113
-15,772
| -66% | -$262K |
2025 Q3
2 quarters
|
|
4817
Digital Turbine
APPS
$1.37B
| $126K | ﹤0.01% |
43,611
-37,494
| -46% | -$161K |
2024 Q4
5 quarters
|
|
4818
Macerich
MAC
$6.48B
| $125K | ﹤0.01% |
+6,636
| New | +$126K |
2026 Q1
0 quarters
|
|
4819
CALL
Primerica
PRI
$8.52B
| $125K | ﹤0.01% |
+500
| New | +$129K |
2026 Q1
0 quarters
|
|
4820
PUT
Outset Medical
OM
$75.9M
| $125K | ﹤0.01% |
32,600
+2,300
| +8% | +$9.43K |
2023 Q4
9 quarters
|
|
|
HIVE
4821
PUT
HIVE Digital Technologies
HIVE
$801M
| $125K | ﹤0.01% |
+65,800
| New | +$162K |
2026 Q1
0 quarters
|
|
4822
CALL
Flowserve
FLS
$9.46B
| $125K | ﹤0.01% |
1,700
+500
| +42% | +$39.6K |
2016 Q2
39 quarters
|
|
4823
PUT
Nexa Resources
NEXA
$1.63B
| $125K | ﹤0.01% |
11,800
+11,200
| +1,867% | +$129K |
2025 Q4
1 quarter
|
|
4824
PUT
Wabtec
WAB
$48.6B
| $125K | ﹤0.01% |
+500
| New | +$121K |
2026 Q1
0 quarters
|
|
4825
CALL
Limbach Holdings
LMB
$581M
| $125K | ﹤0.01% |
1,600
-200
| -11% | -$16.8K |
2022 Q1
16 quarters
|
|
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's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- 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 2,157 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.