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 | |
|---|---|---|---|---|---|---|
1851
CALL
Zions Bancorporation
ZION
$10.1B
| $1.91M | ﹤0.01% |
33,200
-25,500
| -43% | -$1.5M |
|
1852
UiPath
PATH
$5.62B
| $1.91M | ﹤0.01% |
172,305
-230,765
| -57% | -$2.94M |
|
1853
Qiagen
QGEN
$8.53B
| $1.91M | ﹤0.01% |
47,722
+20,948
| +78% | +$991K |
|
1854
Enphase Energy
ENPH
$4.84B
| $1.91M | ﹤0.01% |
50,533
-8,522
| -14% | -$354K |
|
|
PDS
1855
CALL
Precision Drilling
PDS
$1.09B
| $1.91M | ﹤0.01% |
+19,400
| New | +$1.66M |
|
1856
CALL
TMC The Metals Company
TMC
$1.59B
| $1.9M | ﹤0.01% |
407,400
-2,071,700
| -84% | -$13.4M |
|
|
TEN
1857
CALL
Tsakos Energy Navigation Ltd
TEN
$1.19B
| $1.9M | ﹤0.01% |
+48,200
| New | +$1.48M |
|
1858
CALL
Praxis Precision Medicines
PRAX
$9.07B
| $1.9M | ﹤0.01% |
+5,900
| New | +$1.83M |
|
1859
American Airlines Group
AAL
$9.58B
| $1.9M | ﹤0.01% |
176,984
-519,641
| -75% | -$6.89M |
|
1860
PUT
Piper Sandler
PIPR
$5.14B
| $1.9M | ﹤0.01% |
+24,800
| New | +$2.04M |
|
1861
CALL
Elanco Animal Health
ELAN
$12.4B
| $1.9M | ﹤0.01% |
79,300
+18,000
| +29% | +$440K |
|
1862
Direxion Daily Energy Bull 2X ETF
ERX
$239M
| $1.9M | ﹤0.01% |
18,409
+1,462
| +9% | +$117K |
|
1863
CALL
AMC Entertainment Holdings
AMC
$2.03B
| $1.9M | ﹤0.01% |
1,934,000
-888,900
| -31% | -$1.14M |
|
|
DAWN
1864
PUT
DELISTED
Day One Biopharmaceuticals
DAWN
| $1.9M | ﹤0.01% |
+88,400
| New | +$1.25M |
|
1865
CALL
Match Group
MTCH
$8.84B
| $1.89M | ﹤0.01% |
61,700
-153,100
| -71% | -$4.77M |
|
1866
PUT
FMC
FMC
$1.42B
| $1.89M | ﹤0.01% |
109,900
-8,300
| -7% | -$124K |
|
1867
PUT
Ivanhoe Electric
IE
$1.43B
| $1.89M | ﹤0.01% |
159,900
+103,400
| +183% | +$1.62M |
|
|
PR
1868
PUT
Permian Resources
PR
$17.9B
| $1.89M | ﹤0.01% |
88,600
-102,300
| -54% | -$1.77M |
|
1869
PUT
Carlyle Group
CG
$16.3B
| $1.89M | ﹤0.01% |
39,000
+27,100
| +228% | +$1.49M |
|
1870
PUT
BBVA Argentina
BBAR
$3.85B
| $1.89M | ﹤0.01% |
117,500
+39,100
| +50% | +$648K |
|
1871
PUT
Emerson Electric
EMR
$82.9B
| $1.89M | ﹤0.01% |
14,400
-45,300
| -76% | -$6.51M |
|
1872
PUT
NetApp
NTAP
$32.9B
| $1.88M | ﹤0.01% |
18,400
-17,600
| -49% | -$1.79M |
|
1873
Vicor
VICR
$9.62B
| $1.88M | ﹤0.01% |
11,698
+2,102
| +22% | +$347K |
|
1874
PUT
Keurig Dr Pepper
KDP
$40.4B
| $1.88M | ﹤0.01% |
71,500
-204,400
| -74% | -$5.73M |
|
1875
Direxion Daily S&P 500 Bear 3x ETF
SPXS
$348M
| $1.88M | ﹤0.01% |
+46,469
| New | +$1.68M |
|
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.