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 | |
|---|---|---|---|---|---|---|
826
PUT
UiPath
PATH
$5.62B
| $7.66M | 0.01% |
690,200
-182,100
| -21% | -$2.32M |
|
827
CALL
MGM Resorts International
MGM
$11.7B
| $7.64M | 0.01% |
206,300
-254,200
| -55% | -$9.05M |
|
828
PUT
Lyft
LYFT
$5.39B
| $7.63M | 0.01% |
573,900
-701,800
| -55% | -$10.9M |
|
829
Energy Transfer Partners
ET
$70.1B
| $7.61M | 0.01% |
394,233
-338,231
| -46% | -$6.19M |
|
830
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $7.59M | 0.01% |
35,300
-1,200
| -3% | -$268K |
|
831
CALL
Zscaler
ZS
$23B
| $7.58M | 0.01% |
54,000
-79,300
| -59% | -$14.1M |
|
832
CALL
Enviri
NVRI
$621M
| $7.54M | 0.01% |
384,300
+126,900
| +49% | +$2.36M |
|
833
PUT
United Rentals
URI
$71.1B
| $7.5M | 0.01% |
10,300
-1,200
| -10% | -$1.01M |
|
834
Tesla
TSLA
$1.24T
| $7.5M | 0.01% |
20,177
-99,914
| -83% | -$41.2M |
|
|
FIG
835
CALL
Figma
FIG
$11.2B
| $7.5M | 0.01% |
354,600
+70,400
| +25% | +$1.93M |
|
836
CALL
TechnipFMC
FTI
$30.6B
| $7.48M | 0.01% |
108,200
+42,400
| +64% | +$2.55M |
|
|
AXON
837
PUT
Axon Enterprise
AXON
$40.5B
| $7.47M | 0.01% |
17,600
-28,200
| -62% | -$14.7M |
|
838
PUT
Truist Financial
TFC
$63.2B
| $7.46M | 0.01% |
162,200
+47,300
| +41% | +$2.34M |
|
839
PUT
Fluor
FLR
$7.29B
| $7.43M | 0.01% |
159,200
+9,200
| +6% | +$429K |
|
840
PUT
Ulta Beauty
ULTA
$20.4B
| $7.42M | 0.01% |
14,200
+2,400
| +20% | +$1.53M |
|
841
PUT
Boyd Gaming
BYD
$6.47B
| $7.42M | 0.01% |
90,300
+70,800
| +363% | +$5.94M |
|
842
iShares Bitcoin Trust
IBIT
$47.2B
| $7.42M | 0.01% |
193,026
-9,894
| -5% | -$428K |
|
843
PUT
LyondellBasell Industries
LYB
$19.5B
| $7.4M | 0.01% |
91,800
-11,200
| -11% | -$664K |
|
844
PUT
Sarepta Therapeutics
SRPT
$1.66B
| $7.39M | 0.01% |
339,700
-42,100
| -11% | -$815K |
|
845
CALL
Sable Offshore Corp
SOC
$903M
| $7.39M | 0.01% |
447,300
-779,000
| -64% | -$9.1M |
|
846
CALL
SoundHound AI
SOUN
$2.68B
| $7.39M | 0.01% |
1,075,000
-140,400
| -12% | -$1.21M |
|
847
CALL
Copart
CPRT
$25.9B
| $7.37M | ﹤0.01% |
222,000
+28,500
| +15% | +$1.07M |
|
848
CALL
Prologis
PLD
$138B
| $7.36M | ﹤0.01% |
55,700
-36,800
| -40% | -$4.92M |
|
849
CALL
VF Corp
VFC
$6.68B
| $7.36M | ﹤0.01% |
433,200
-293,400
| -40% | -$5.53M |
|
850
PUT
TE Connectivity
TEL
$58.8B
| $7.36M | ﹤0.01% |
35,200
+12,100
| +52% | +$2.67M |
|
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.