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 | |
|---|---|---|---|---|---|---|
5676
CALL
Cineverse
CNVS
$57.6M
| $59.8K | ﹤0.01% |
24,900
+15,100
| +154% | +$36.4K |
|
|
MAZE
5677
CALL
Maze Therapeutics
MAZE
$1.53B
| $59.7K | ﹤0.01% |
2,000
+1,900
| +1,900% | +$83.9K |
|
5678
CALL
Caribou Biosciences
CRBU
$162M
| $59.7K | ﹤0.01% |
31,400
-39,600
| -56% | -$68K |
|
5679
PUT
Pegasystems
PEGA
$4.28B
| $59.6K | ﹤0.01% |
1,400
-1,100
| -44% | -$51.1K |
|
5680
PUT
Ceco Environmental
CECO
$4.65B
| $59.6K | ﹤0.01% |
1,000
+900
| +900% | +$57.9K |
|
5681
PUT
Perdoceo Education
PRDO
$1.93B
| $59.5K | ﹤0.01% |
1,600
+1,500
| +1,500% | +$49.6K |
|
5682
CALL
MarineMax
HZO
$739M
| $59.5K | ﹤0.01% |
2,200
+1,900
| +633% | +$52.7K |
|
5683
Select Water Solutions
WTTR
$2.59B
| $59.5K | ﹤0.01% |
3,890
-712
| -15% | -$9.31K |
|
|
XNET
5684
PUT
Xunlei
XNET
$354M
| $59.5K | ﹤0.01% |
10,700
-18,700
| -64% | -$119K |
|
5685
Alignment Healthcare
ALHC
$4.13B
| $59.4K | ﹤0.01% |
+3,372
| New | +$67.7K |
|
5686
Entravision Communication
EVC
$969M
| $59.4K | ﹤0.01% |
+20,002
| New | +$61.3K |
|
|
LTM
5687
CALL
LATAM Airlines Group S.A.
LTM
$14.3B
| $59.3K | ﹤0.01% |
+1,200
| New | +$67.8K |
|
5688
Amplify Blockchain Technology ETF
BLOK
$1.13B
| $59.3K | ﹤0.01% |
1,190
-366
| -24% | -$20.6K |
|
5689
Clarivate
CLVT
$1.24B
| $59.2K | ﹤0.01% |
23,415
+4,478
| +24% | +$11.5K |
|
5690
Landstar System
LSTR
$7.06B
| $59.2K | ﹤0.01% |
369
+183
| +98% | +$28.1K |
|
5691
Vanguard Health Care ETF
VHT
$18.1B
| $59.1K | ﹤0.01% |
+217
| New | +$62K |
|
5692
CALL
PetMed Express
PETS
$43.8M
| $59.1K | ﹤0.01% |
25,900
-66,700
| -72% | -$194K |
|
5693
PUT
Telus
TU
$15.8B
| $59K | ﹤0.01% |
4,600
-3,800
| -45% | -$51.4K |
|
5694
PUT
Progress Software
PRGS
$1.51B
| $59K | ﹤0.01% |
2,300
+1,900
| +475% | +$72.6K |
|
|
AIOT
5695
CALL
PowerFleet Inc
AIOT
$509M
| $58.8K | ﹤0.01% |
19,100
+600
| +3% | +$2.51K |
|
5696
Alliance Resource Partners
ARLP
$3.19B
| $58.8K | ﹤0.01% |
+2,127
| New | +$55.1K |
|
5697
First Watch Restaurant Group
FWRG
$737M
| $58.7K | ﹤0.01% |
+5,602
| New | +$80.9K |
|
|
AIV
5698
Aimco
AIV
$380M
| $58.6K | ﹤0.01% |
+14,399
| New | +$75.3K |
|
5699
CALL
Moog Inc Class A
MOG.A
$13B
| $58.5K | ﹤0.01% |
+200
| New | +$61.2K |
|
|
5700
PUT
Moog Inc Class A
MOG.A
$13B
| $58.5K | ﹤0.01% |
+200
| New | +$61.2K |
|
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.