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 | |
|---|---|---|---|---|---|---|
8301
PUT
Appian
APPN
$2.52B
| $2.41K | ﹤0.01% |
100
-2,000
| -95% | -$54.3K |
|
|
PPBT
8302
Purple Biotech
PPBT
$2.39M
| $2.41K | ﹤0.01% |
597
-326
| -35% | -$1.76K |
|
8303
Fulton Financial
FULT
$4.3B
| $2.4K | ﹤0.01% |
+118
| New | +$2.43K |
|
8304
PUT
Prelude Therapeutics
PRLD
$314M
| $2.39K | ﹤0.01% |
700
-300
| -30% | -$787 |
|
|
HBR
8305
Canary HBAR ETF
HBR
$75.4M
| $2.39K | ﹤0.01% |
201
+154
| +328% | +$2.13K |
|
8306
iShares MSCI Pacific ex Japan ETF
EPP
$2.22B
| $2.39K | ﹤0.01% |
+45
| New | +$2.42K |
|
8307
CALL
West Bancorporation
WTBA
$486M
| $2.38K | ﹤0.01% |
100
| – | – |
|
8308
NeoVolta
NEOV
$155M
| $2.38K | ﹤0.01% |
+772
| New | +$3.01K |
|
8309
CALL
Consensus Cloud Solutions
CCSI
$648M
| $2.37K | ﹤0.01% |
+100
| New | +$2.57K |
|
|
VWAV
8310
PUT
VisionWave Holdings
VWAV
$10.6M
| $2.37K | ﹤0.01% |
25
-15
| -38% | -$2.68K |
|
8311
PUT
Nomura Holdings
NMR
$28.6B
| $2.37K | ﹤0.01% |
300
-1,800
| -86% | -$15.5K |
|
8312
PUT
Four Corners Property Trust
FCPT
$2.38B
| $2.37K | ﹤0.01% |
100
| – | – |
|
8313
Franklin FTSE Brazil ETF
FLBR
$638M
| $2.37K | ﹤0.01% |
+99
| New | +$2.21K |
|
8314
NMI Holdings
NMIH
$2.76B
| $2.36K | ﹤0.01% |
+63
| New | +$2.44K |
|
|
FIRY
8315
CALL
Firy Inc
FIRY
$204M
| $2.33K | ﹤0.01% |
900
-7,200
| -89% | -$25.7K |
|
8316
CALL
Oil States International
OIS
$484M
| $2.33K | ﹤0.01% |
+200
| New | +$2.06K |
|
8317
CALL
TechTarget
TTGT
$271M
| $2.33K | ﹤0.01% |
+600
| New | +$2.76K |
|
8318
First Bancorp
FNLC
$377M
| $2.33K | ﹤0.01% |
83
+45
| +118% | +$1.25K |
|
|
GMEU
8319
T-REX 2X Long GME Daily Target ETF
GMEU
$28.2M
| $2.31K | ﹤0.01% |
227
+148
| +187% | +$1.62K |
|
8320
CALL
A10 Networks
ATEN
$2B
| $2.31K | ﹤0.01% |
100
-800
| -89% | -$15.6K |
|
|
TOUR
8321
PUT
Tuniu
TOUR
$54.2M
| $2.31K | ﹤0.01% |
300
+200
| +200% | +$1.36K |
|
8322
CALL
OneSpaWorld
OSW
$2.3B
| $2.29K | ﹤0.01% |
+100
| New | +$2.13K |
|
8323
CALL
Grid Dynamics Holdings
GDYN
$638M
| $2.28K | ﹤0.01% |
400
+300
| +300% | +$2.21K |
|
8324
PUT
Enovis
ENOV
$1.05B
| $2.27K | ﹤0.01% |
100
-5,700
| -98% | -$135K |
|
8325
Titan Machinery
TITN
$545M
| $2.27K | ﹤0.01% |
136
-869
| -86% | -$15.1K |
|
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.