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 | |
|---|---|---|---|---|---|---|
851
PUT
Chewy
CHWY
$8.54B
| $7.34M | ﹤0.01% |
272,000
-93,700
| -26% | -$2.61M |
|
|
EH
852
CALL
EHang Holdings
EH
$372M
| $7.34M | ﹤0.01% |
755,600
-76,300
| -9% | -$939K |
|
853
CALL
General Mills
GIS
$19.2B
| $7.31M | ﹤0.01% |
196,500
-17,400
| -8% | -$756K |
|
854
PUT
Electronic Arts
EA
$52.4B
| $7.28M | ﹤0.01% |
35,700
-23,600
| -40% | -$4.76M |
|
855
Canadian Pacific Kansas City
CP
$82B
| $7.24M | ﹤0.01% |
+92,018
| New | +$7.27M |
|
856
PUT
Modine Manufacturing
MOD
$12.8B
| $7.24M | ﹤0.01% |
33,400
+17,400
| +109% | +$3.28M |
|
857
CALL
NuScale Power
SMR
$2.8B
| $7.23M | ﹤0.01% |
666,900
+27,000
| +4% | +$411K |
|
858
CALL
Centrus Energy
LEU
$3.22B
| $7.22M | ﹤0.01% |
41,600
+4,800
| +13% | +$1.16M |
|
859
CALL
Upstart Holdings
UPST
$2.58B
| $7.2M | ﹤0.01% |
280,800
-69,000
| -20% | -$2.43M |
|
860
PUT
VF Corp
VFC
$6.68B
| $7.2M | ﹤0.01% |
423,700
-87,100
| -17% | -$1.64M |
|
861
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$746M
| $7.19M | ﹤0.01% |
138,200
-205,400
| -60% | -$3.88M |
|
862
CALL
Ero Copper
ERO
$2.71B
| $7.17M | ﹤0.01% |
268,800
+83,900
| +45% | +$2.52M |
|
863
CALL
AerCap
AER
$23.9B
| $7.15M | ﹤0.01% |
52,100
-16,300
| -24% | -$2.33M |
|
864
CALL
L3Harris
LHX
$55.9B
| $7.14M | ﹤0.01% |
20,700
+14,900
| +257% | +$5.21M |
|
865
PUT
Synopsys
SNPS
$71.5B
| $7.14M | ﹤0.01% |
18,000
-34,900
| -66% | -$15.8M |
|
|
FIGR
866
CALL
Figure Technology Solutions
FIGR
$6.1B
| $7.14M | ﹤0.01% |
210,200
+175,000
| +497% | +$7.54M |
|
867
ProShares UltraPro Short QQQ
SQQQ
$2.21B
| $7.13M | ﹤0.01% |
88,643
-57,834
| -39% | -$4.1M |
|
868
CALL
SolarEdge
SEDG
$2.59B
| $7.13M | ﹤0.01% |
139,700
-85,800
| -38% | -$3.23M |
|
869
Iris Energy
IREN
$13.2B
| $7.12M | ﹤0.01% |
207,840
+15,946
| +8% | +$720K |
|
870
CALL
Redwire
RDW
$2.08B
| $7.11M | ﹤0.01% |
836,400
+179,500
| +27% | +$1.76M |
|
|
FISV
871
PUT
Fiserv Inc
FISV
$27.2B
| $7.1M | ﹤0.01% |
127,200
-36,800
| -22% | -$2.28M |
|
872
CALL
iShares iBonds 2030 Term High Yield and Income ETF
IBHJ
$151M
| $7.08M | ﹤0.01% |
75,000
+52,900
| +239% | +$1.4M |
|
873
PUT
Energy Transfer Partners
ET
$70.1B
| $7.07M | ﹤0.01% |
366,500
-491,000
| -57% | -$8.99M |
|
874
PUT
American Electric Power
AEP
$73.7B
| $7.05M | ﹤0.01% |
53,800
+1,200
| +2% | +$150K |
|
875
CALL
Nucor
NUE
$56.4B
| $7.05M | ﹤0.01% |
41,700
-39,000
| -48% | -$6.8M |
|
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.