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 | |
|---|---|---|---|---|---|---|
5276
CPI Aerostructures
CVU
$62.2M
| $85.7K | ﹤0.01% |
21,869
+18,265
| +507% | +$75.7K |
|
5277
CMS Energy
CMS
$23.1B
| $85.6K | ﹤0.01% |
1,104
-3,772
| -77% | -$280K |
|
5278
PUT
Colliers International
CIGI
$4.98B
| $85.5K | ﹤0.01% |
+800
| New | +$99.7K |
|
5279
CALL
ManpowerGroup
MAN
$2.39B
| $85.4K | ﹤0.01% |
2,900
-2,800
| -49% | -$83.2K |
|
5280
CALL
Ducommun
DCO
$2.68B
| $85.4K | ﹤0.01% |
+700
| New | +$83.7K |
|
5281
CALL
Aspen Aerogels
ASPN
$387M
| $85.2K | ﹤0.01% |
24,900
-65,600
| -72% | -$221K |
|
5282
GSI Technology
GSIT
$216M
| $85.2K | ﹤0.01% |
16,567
-70,747
| -81% | -$513K |
|
5283
PUT
Qorvo
QRVO
$7.63B
| $85.1K | ﹤0.01% |
1,100
-1,700
| -61% | -$138K |
|
5284
PUT
Avalo Therapeutics
AVTX
$976M
| $85.1K | ﹤0.01% |
+5,700
| New | +$89.1K |
|
5285
CALL
Arcosa
ACA
$7.12B
| $84.9K | ﹤0.01% |
800
+600
| +300% | +$68.2K |
|
5286
PRA Group
PRAA
$648M
| $84.8K | ﹤0.01% |
+4,846
| New | +$73.7K |
|
5287
PUT
MYR Group
MYRG
$5.9B
| $84.7K | ﹤0.01% |
+300
| New | +$78K |
|
5288
PUT
Evolus
EOLS
$394M
| $84.7K | ﹤0.01% |
20,600
+20,100
| +4,020% | +$97.4K |
|
5289
Dime Commercial Bancshares
DCOM
$1.75B
| $84.6K | ﹤0.01% |
+2,502
| New | +$82.2K |
|
5290
O-I Glass
OI
$1.39B
| $84.6K | ﹤0.01% |
8,050
-22,281
| -73% | -$307K |
|
5291
PUT
Driven Brands
DRVN
$2.25B
| $84.5K | ﹤0.01% |
6,700
+2,700
| +68% | +$38K |
|
5292
PUT
Global X S&P 500 Covered Call ETF
XYLD
$3.2B
| $84.4K | ﹤0.01% |
1,600
+1,500
| +1,500% | +$60.6K |
|
|
WLAC
5293
PUT
DELISTED
Willow Lane Acquisition Corp
WLAC
| $84.1K | ﹤0.01% |
+7,900
| New | +$89.8K |
|
5294
CALL
Acuity Brands
AYI
$9.88B
| $84.1K | ﹤0.01% |
300
-3,400
| -92% | -$1.03M |
|
5295
FTAI Aviation
FTAI
$22.2B
| $84K | ﹤0.01% |
+343
| New | +$90.8K |
|
5296
PUT
Dorchester Minerals
DMLP
$1.34B
| $84K | ﹤0.01% |
3,100
+200
| +7% | +$5.09K |
|
5297
CALL
Stem
STEM
$49.2M
| $84K | ﹤0.01% |
9,500
-641,000
| -99% | -$8.61M |
|
5298
Federated Hermes
FHI
$4.4B
| $83.9K | ﹤0.01% |
+1,479
| New | +$81K |
|
5299
PUT
Zebra Technologies
ZBRA
$12.4B
| $83.6K | ﹤0.01% |
+400
| New | +$93.9K |
|
5300
Seanergy Maritime Holdings
SHIP
$351M
| $83.2K | ﹤0.01% |
+6,442
| New | +$75.6K |
|
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.