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 | |
|---|---|---|---|---|---|---|
3951
PUT
Essex Property Trust
ESS
$18.3B
| $266K | ﹤0.01% |
1,100
+600
| +120% | +$151K |
|
3952
ANI Pharmaceuticals
ANIP
$1.8B
| $266K | ﹤0.01% |
3,459
-693
| -17% | -$54.1K |
|
3953
PUT
PTC Therapeutics
PTCT
$5.68B
| $266K | ﹤0.01% |
3,900
-1,100
| -22% | -$77.9K |
|
3954
Janus Henderson B-BBB CLO ETF
JBBB
$1.4B
| $265K | ﹤0.01% |
5,695
-20,643
| -78% | -$980K |
|
3955
CALL
Global E Online
GLBE
$6.6B
| $265K | ﹤0.01% |
8,600
-52,300
| -86% | -$1.84M |
|
3956
PUT
Prime Medicine
PRME
$527M
| $265K | ﹤0.01% |
76,200
-68,700
| -47% | -$261K |
|
|
BZUN
3957
Baozun
BZUN
$167M
| $265K | ﹤0.01% |
110,879
+107,115
| +2,846% | +$279K |
|
3958
Equitable Holdings
EQH
$13B
| $265K | ﹤0.01% |
7,138
+6,977
| +4,334% | +$299K |
|
3959
ProShares Ultra Bloomberg Natural Gas
BOIL
$344M
| $265K | ﹤0.01% |
8,211
-29,903
| -78% | -$1.19M |
|
3960
PUT
Sun Communities
SUI
$15.2B
| $265K | ﹤0.01% |
2,100
| – | – |
|
3961
PUT
InfraCap MLP ETF
AMZA
$470M
| $264K | ﹤0.01% |
12,400
-7,700
| -38% | -$337K |
|
3962
CALL
Tenet Healthcare
THC
$20.5B
| $264K | ﹤0.01% |
1,400
-20,100
| -93% | -$4.23M |
|
3963
Invesco DB Base Metals Fund
DBB
$312M
| $264K | ﹤0.01% |
+11,242
| New | +$268K |
|
3964
CALL
Return Stacked Bonds & Managed Futures ETF
RSBT
$135M
| $264K | ﹤0.01% |
17,400
-145,800
| -89% | -$2.76M |
|
3965
CALL
Arbutus Biopharma
ABUS
$857M
| $264K | ﹤0.01% |
58,600
-40,800
| -41% | -$178K |
|
|
NBIS
3966
Nebius Group N.V.
NBIS
$48.3B
| $263K | ﹤0.01% |
+2,537
| New | +$253K |
|
3967
Ares Capital
ARCC
$13.5B
| $263K | ﹤0.01% |
+14,603
| New | +$283K |
|
|
SW
3968
PUT
Smurfit Westrock
SW
$24.1B
| $263K | ﹤0.01% |
6,600
-37,500
| -85% | -$1.62M |
|
3969
Darden Restaurants
DRI
$23.3B
| $263K | ﹤0.01% |
+1,341
| New | +$276K |
|
3970
CALL
Globant
GLOB
$1.58B
| $263K | ﹤0.01% |
5,700
-58,300
| -91% | -$3.22M |
|
|
WAY
3971
PUT
Waystar Holding Corp
WAY
$4.05B
| $263K | ﹤0.01% |
10,900
-4,100
| -27% | -$109K |
|
|
JBIO
3972
PUT
Jade Biosciences
JBIO
$1.2B
| $263K | ﹤0.01% |
18,700
| – | – |
|
3973
PUT
Agilent Technologies
A
$39.1B
| $262K | ﹤0.01% |
2,300
-8,200
| -78% | -$1.04M |
|
|
BOBS
3974
CALL
Bobs Discount Furniture
BOBS
$2.18B
| $262K | ﹤0.01% |
+22,300
| New | +$380K |
|
3975
CALL
ARS Pharmaceuticals
SPRY
$509M
| $262K | ﹤0.01% |
32,600
-18,700
| -36% | -$179K |
|
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.