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 | |
|---|---|---|---|---|---|---|
5651
PUT
3D Systems Corp
DDD
$420M
| $60.9K | ﹤0.01% |
32,400
-58,100
| -64% | -$129K |
|
|
SFIX
5652
CALL
Stitch Fix
SFIX
$463M
| $60.9K | ﹤0.01% |
18,400
-66,400
| -78% | -$271K |
|
5653
PUT
Coty
COTY
$2.25B
| $60.9K | ﹤0.01% |
30,300
+25,700
| +559% | +$69.1K |
|
5654
PUT
Priority Technology Holdings
PRTH
$512M
| $60.9K | ﹤0.01% |
+12,900
| New | +$70.6K |
|
5655
CALL
Reliance Steel & Aluminium
RS
$20.1B
| $60.8K | ﹤0.01% |
200
| – | – |
|
5656
CALL
Essential Properties Realty Trust
EPRT
$6.95B
| $60.7K | ﹤0.01% |
2,000
-400
| -17% | -$12.7K |
|
5657
CALL
Camtek
CAMT
$7.19B
| $60.6K | ﹤0.01% |
400
-10,200
| -96% | -$1.55M |
|
5658
Pliant Therapeutics
PLRX
$67.5M
| $60.5K | ﹤0.01% |
48,054
+2,142
| +5% | +$2.7K |
|
5659
PUT
Inhibrx
INBX
$1.25B
| $60.5K | ﹤0.01% |
900
-2,500
| -74% | -$185K |
|
5660
CALL
Teledyne Technologies
TDY
$30.2B
| $60.5K | ﹤0.01% |
+100
| New | +$62.4K |
|
5661
PUT
Insight Enterprises
NSIT
$3.51B
| $60.3K | ﹤0.01% |
+900
| New | +$73.6K |
|
5662
CALL
Agree Realty
ADC
$9.54B
| $60.3K | ﹤0.01% |
800
| – | – |
|
5663
CALL
Xencor
XNCR
$1.44B
| $60.3K | ﹤0.01% |
5,000
+3,600
| +257% | +$44.7K |
|
5664
CALL
Voyager Therapeutics
VYGR
$185M
| $60.2K | ﹤0.01% |
15,600
+11,500
| +280% | +$45.3K |
|
5665
ITT
ITT
$17.5B
| $60.2K | ﹤0.01% |
+316
| New | +$60.1K |
|
5666
VanEck Vietnam ETF
VNM
$497M
| $60.2K | ﹤0.01% |
3,476
-11,097
| -76% | -$204K |
|
5667
CALL
Alkermes
ALKS
$8.82B
| $60.1K | ﹤0.01% |
1,700
-3,200
| -65% | -$99.3K |
|
5668
PUT
Ethan Allen Interiors
ETD
$569M
| $60.1K | ﹤0.01% |
2,700
+1,600
| +145% | +$37.2K |
|
5669
PUT
ClearPoint Neuro
CLPT
$429M
| $60.1K | ﹤0.01% |
6,600
-19,100
| -74% | -$241K |
|
|
HIMX
5670
Himax Technologies
HIMX
$2.3B
| $60K | ﹤0.01% |
7,624
-6,918
| -48% | -$56.8K |
|
5671
CALL
EPR Properties
EPR
$4.73B
| $60K | ﹤0.01% |
1,200
-1,500
| -56% | -$82.5K |
|
5672
Forte Biosciences
FBRX
$1.25B
| $59.9K | ﹤0.01% |
2,312
-3,703
| -62% | -$107K |
|
5673
CALL
Old Republic International
ORI
$9.99B
| $59.8K | ﹤0.01% |
1,500
-7,000
| -82% | -$288K |
|
5674
CALL
Blend Labs
BLND
$412M
| $59.8K | ﹤0.01% |
35,200
-59,100
| -63% | -$126K |
|
5675
CALL
FTAI Infrastructure
FIP
$518M
| $59.8K | ﹤0.01% |
12,100
+9,900
| +450% | +$55.5K |
|
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.