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 | |
|---|---|---|---|---|---|---|
8151
PUT
Black Diamond Therapeutics
BDTX
$105M
| $3.19K | ﹤0.01% |
+1,500
| New | +$3.57K |
|
8152
CALL
Telefônica Brasil
VIV
$22.4B
| $3.18K | ﹤0.01% |
200
-2,700
| -93% | -$39.9K |
|
8153
PUT
Fulgent Genetics
FLGT
$555M
| $3.18K | ﹤0.01% |
200
-11,300
| -98% | -$245K |
|
8154
iShares MSCI Saudi Arabia ETF
KSA
$648M
| $3.18K | ﹤0.01% |
80
-610
| -88% | -$23.3K |
|
8155
PUT
MacroGenics
MGNX
$273M
| $3.18K | ﹤0.01% |
1,100
+200
| +22% | +$427 |
|
8156
PUT
FT Vest Gold Strategy Target Income ETF
IGLD
$515M
| $3.17K | ﹤0.01% |
100
-6,200
| -98% | -$167K |
|
8157
CALL
Caleres
CAL
$422M
| $3.16K | ﹤0.01% |
300
-10,800
| -97% | -$129K |
|
8158
CALL
OneSpan
OSPN
$562M
| $3.16K | ﹤0.01% |
300
-2,100
| -88% | -$23.8K |
|
8159
PUT
James River Group Holdings
JRVR
$209M
| $3.15K | ﹤0.01% |
+500
| New | +$3.29K |
|
|
VOXR
8160
PUT
Vox Royalty Corp
VOXR
$305M
| $3.14K | ﹤0.01% |
+600
| New | +$3.21K |
|
8161
PUT
WaFd
WAFD
$2.72B
| $3.14K | ﹤0.01% |
+100
| New | +$3.22K |
|
8162
Riskified
RSKD
$673M
| $3.14K | ﹤0.01% |
800
-10,364
| -93% | -$45.9K |
|
|
HOII
8163
DELISTED
REX HOOD Growth & Income ETF
HOII
| $3.13K | ﹤0.01% |
302
+301
| +30,100% | +$4K |
|
8164
Xtrackers MSCI EAFE Hedged Equity ETF
DBEF
$9.17B
| $3.11K | ﹤0.01% |
63
+4
| +7% | +$200 |
|
8165
CALL
Myomo
MYO
$40.2M
| $3.11K | ﹤0.01% |
4,600
+4,400
| +2,200% | +$3.61K |
|
|
FWDI
8166
PUT
Forward Industries Inc
FWDI
$319M
| $3.1K | ﹤0.01% |
700
-3,000
| -81% | -$17.2K |
|
8167
CALL
EverQuote
EVER
$880M
| $3.08K | ﹤0.01% |
200
-1,300
| -87% | -$24.6K |
|
8168
CALL
Shenandoah Telecom
SHEN
$651M
| $3.08K | ﹤0.01% |
+200
| New | +$2.62K |
|
|
8169
PUT
Shenandoah Telecom
SHEN
$651M
| $3.08K | ﹤0.01% |
+200
| New | +$2.62K |
|
8170
PUT
Cartesian Therapeutics
RNAC
$239M
| $3.08K | ﹤0.01% |
500
| – | – |
|
8171
First Trust Nasdaq Bank ETF
FTXO
$305M
| $3.07K | ﹤0.01% |
+85
| New | +$3.21K |
|
8172
CALL
Holley
HLLY
$307M
| $3.07K | ﹤0.01% |
1,000
-24,500
| -96% | -$92.8K |
|
8173
Essential Properties Realty Trust
EPRT
$7.06B
| $3.07K | ﹤0.01% |
+101
| New | +$3.2K |
|
8174
PLAYSTUDIOS Inc
MYPS
$87.6M
| $3.06K | ﹤0.01% |
6,516
+2,014
| +45% | +$1.09K |
|
8175
Cadence Design Systems
CDNS
$93B
| $3.06K | ﹤0.01% |
11
-2,632
| -100% | -$785K |
|
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.