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 | |
|---|---|---|---|---|---|---|
4101
CALL
Beam Therapeutics
BEAM
$2.63B
| $236K | ﹤0.01% |
9,900
-60,900
| -86% | -$1.69M |
|
|
WLTH
4102
PUT
Wealthfront Corp
WLTH
$1.42B
| $236K | ﹤0.01% |
+25,500
| New | +$233K |
|
|
GRRR
4103
PUT
Gorilla Technology Group
GRRR
$308M
| $236K | ﹤0.01% |
+22,400
| New | +$273K |
|
4104
PUT
OR Royalties Inc
OR
$5.58B
| $236K | ﹤0.01% |
6,200
+1,800
| +41% | +$73.9K |
|
|
ACB
4105
CALL
Aurora Cannabis
ACB
$173M
| $235K | ﹤0.01% |
72,000
-61,400
| -46% | -$232K |
|
4106
PUT
TAL Education Group
TAL
$6.93B
| $235K | ﹤0.01% |
20,700
-57,300
| -73% | -$645K |
|
4107
PUT
California Resources
CRC
$4.67B
| $235K | ﹤0.01% |
3,400
+1,700
| +100% | +$96.2K |
|
4108
PUT
Tiptree Inc
TIPT
$662M
| $235K | ﹤0.01% |
13,900
-87,400
| -86% | -$1.5M |
|
4109
PUT
Globant
GLOB
$1.58B
| $235K | ﹤0.01% |
5,100
-51,000
| -91% | -$2.82M |
|
4110
PUT
Ziff Davis
ZD
$1.96B
| $235K | ﹤0.01% |
5,600
+3,600
| +180% | +$132K |
|
4111
PUT
Camping World
CWH
$639M
| $235K | ﹤0.01% |
34,400
+26,100
| +314% | +$269K |
|
4112
Cellebrite
CLBT
$3.68B
| $235K | ﹤0.01% |
17,035
-24,786
| -59% | -$374K |
|
4113
CALL
Hilton Grand Vacations
HGV
$3.59B
| $235K | ﹤0.01% |
+6,000
| New | +$269K |
|
4114
PUT
Flutter Entertainment
FLUT
$18.1B
| $234K | ﹤0.01% |
2,300
-26,300
| -92% | -$3.79M |
|
4115
Galectin Therapeutics
GALT
$196M
| $234K | ﹤0.01% |
84,000
+78,421
| +1,406% | +$239K |
|
4116
CALL
Alto Ingredients
ALTO
$369M
| $234K | ﹤0.01% |
48,400
-3,300
| -6% | -$10.5K |
|
4117
PUT
Rezolute
RZLT
$454M
| $234K | ﹤0.01% |
76,700
+56,100
| +272% | +$168K |
|
4118
PUT
Fulcrum Therapeutics
FULC
$273M
| $234K | ﹤0.01% |
30,500
+15,600
| +105% | +$145K |
|
4119
CALL
Acadia Healthcare
ACHC
$2.76B
| $234K | ﹤0.01% |
+10,000
| New | +$181K |
|
4120
CALL
Kadant
KAI
$3.63B
| $234K | ﹤0.01% |
800
-700
| -47% | -$225K |
|
|
4121
Alto Ingredients
ALTO
$369M
| $234K | ﹤0.01% |
48,320
+30,053
| +165% | +$95.3K |
|
|
NLOP
4122
CALL
Net Lease Office Properties
NLOP
$173M
| $234K | ﹤0.01% |
20,300
+16,800
| +480% | +$282K |
|
4123
Universal Corp
UVV
$1.31B
| $233K | ﹤0.01% |
+4,428
| New | +$238K |
|
4124
CALL
EyePoint Inc
EYPT
$1.03B
| $233K | ﹤0.01% |
18,100
+4,200
| +30% | +$62.8K |
|
|
ALMU
4125
CALL
Aeluma Inc
ALMU
$297M
| $233K | ﹤0.01% |
17,800
+13,700
| +334% | +$227K |
|
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.