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 | |
|---|---|---|---|---|---|---|
6876
PUT
Eastern Bankshares
EBC
$4.93B
| $17.6K | ﹤0.01% |
900
+600
| +200% | +$12K |
|
|
PSTL
6877
Postal Realty Trust
PSTL
$716M
| $17.6K | ﹤0.01% |
+947
| New | +$17.6K |
|
6878
GraniteShares 2x Long AMZN Daily ETF
AMZZ
$45.2M
| $17.6K | ﹤0.01% |
+718
| New | +$20.2K |
|
6879
PUT
Qualys
QLYS
$5.06B
| $17.6K | ﹤0.01% |
200
| – | – |
|
6880
PUT
SES AI
SES
$232M
| $17.5K | ﹤0.01% |
18,200
-20,900
| -53% | -$35.5K |
|
|
ONDG
6881
PUT
Leverage Shares 2X Long ONDS Daily ETF
ONDG
$21.8M
| $17.5K | ﹤0.01% |
+2,100
| New | +$18.1K |
|
|
BTQ
6882
BTQ Technologies Corp
BTQ
$497M
| $17.5K | ﹤0.01% |
+6,554
| New | +$23.1K |
|
6883
PUT
Amplify Energy
AMPY
$162M
| $17.5K | ﹤0.01% |
2,800
-170,100
| -98% | -$925K |
|
6884
PUT
Arbe Robotics
ARBE
$95.5M
| $17.4K | ﹤0.01% |
28,600
+15,300
| +115% | +$15.9K |
|
6885
PUT
Rhythm Pharmaceuticals
RYTM
$7.31B
| $17.4K | ﹤0.01% |
200
-4,700
| -96% | -$457K |
|
6886
CALL
MiMedx Group
MDXG
$643M
| $17.4K | ﹤0.01% |
4,400
-2,100
| -32% | -$10.6K |
|
|
KDK
6887
PUT
Kodiak AI
KDK
$844M
| $17.4K | ﹤0.01% |
2,500
-20,400
| -89% | -$178K |
|
6888
Idaho Strategic Resources
IDR
$469M
| $17.3K | ﹤0.01% |
+539
| New | +$20.9K |
|
6889
iShares MSCI UAE ETF
UAE
$307M
| $17.3K | ﹤0.01% |
+928
| New | +$18.6K |
|
6890
Health Catalyst
HCAT
$160M
| $17.3K | ﹤0.01% |
+13,621
| New | +$25.6K |
|
6891
Odyssey Marine Exploration
OMEX
$42.9M
| $17.3K | ﹤0.01% |
20,737
-157,817
| -88% | -$268K |
|
6892
CALL
Fate Therapeutics
FATE
$330M
| $17.3K | ﹤0.01% |
14,400
+10,500
| +269% | +$12.8K |
|
6893
PUT
Gaotu Techedu
GOTU
$405M
| $17.2K | ﹤0.01% |
8,800
-15,200
| -63% | -$33.3K |
|
6894
CALL
Univest Financial
UVSP
$1.23B
| $17.1K | ﹤0.01% |
+500
| New | +$16.9K |
|
6895
Oric Pharmaceuticals
ORIC
$1.12B
| $17.1K | ﹤0.01% |
1,348
+852
| +172% | +$9.67K |
|
|
BCIC
6896
BCP Investment Corp
BCIC
$88.5M
| $17K | ﹤0.01% |
2,264
+1,901
| +524% | +$20.6K |
|
6897
CALL
Coherus Oncology
CHRS
$227M
| $16.9K | ﹤0.01% |
10,000
-51,300
| -84% | -$91.1K |
|
6898
PUT
UDR
UDR
$12.9B
| $16.9K | ﹤0.01% |
500
-700
| -58% | -$25.7K |
|
|
BITY
6899
Amplify Bitcoin 2% Monthly Option Income ETF
BITY
$12.9M
| $16.9K | ﹤0.01% |
564
+492
| +683% | +$16.8K |
|
6900
CALL
National Beverage
FIZZ
$2.92B
| $16.8K | ﹤0.01% |
500
+200
| +67% | +$6.93K |
|
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.