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 | |
|---|---|---|---|---|---|---|
901
PUT
Oscar Health
OSCR
$8.5B
| $6.81M | ﹤0.01% |
593,600
-406,300
| -41% | -$5.72M |
|
902
CALL
D.R. Horton
DHI
$41.2B
| $6.78M | ﹤0.01% |
49,400
-64,900
| -57% | -$9.8M |
|
903
PUT
Kinder Morgan
KMI
$73.1B
| $6.77M | ﹤0.01% |
202,000
-91,700
| -31% | -$2.87M |
|
904
PUT
L3Harris
LHX
$55.9B
| $6.76M | ﹤0.01% |
19,600
+18,200
| +1,300% | +$6.36M |
|
905
PUT
S&P Global
SPGI
$126B
| $6.76M | ﹤0.01% |
15,900
+1,400
| +10% | +$650K |
|
|
PR
906
CALL
Permian Resources
PR
$17.9B
| $6.76M | ﹤0.01% |
317,100
-58,700
| -16% | -$1.01M |
|
907
CALL
Sunrun
RUN
$2.37B
| $6.73M | ﹤0.01% |
496,100
-555,400
| -53% | -$9.25M |
|
908
PUT
Celsius Holdings
CELH
$6.93B
| $6.73M | ﹤0.01% |
189,600
-175,700
| -48% | -$8.33M |
|
909
CALL
Stryker
SYK
$127B
| $6.7M | ﹤0.01% |
20,400
-6,500
| -24% | -$2.33M |
|
910
PUT
Alaska Air
ALK
$5.15B
| $6.7M | ﹤0.01% |
182,200
+102,400
| +128% | +$4.94M |
|
911
CALL
StoneCo
STNE
$2.62B
| $6.7M | ﹤0.01% |
474,200
-293,600
| -38% | -$4.51M |
|
912
CALL
Grayscale Bitcoin Trust
GBTC
$9.64B
| $6.68M | ﹤0.01% |
126,700
-98,200
| -44% | -$5.85M |
|
913
CALL
NextDecade
NEXT
$1.85B
| $6.68M | ﹤0.01% |
872,000
-289,300
| -25% | -$1.65M |
|
914
PUT
PVH
PVH
$3.71B
| $6.66M | ﹤0.01% |
95,500
+91,500
| +2,288% | +$6.01M |
|
915
CALL
AB InBev
BUD
$158B
| $6.66M | ﹤0.01% |
96,000
-251,700
| -72% | -$18.2M |
|
916
CALL
Green Plains
GPRE
$1.19B
| $6.62M | ﹤0.01% |
402,500
-54,700
| -12% | -$743K |
|
917
CALL
Intuitive Machines
LUNR
$2.07B
| $6.62M | ﹤0.01% |
356,700
-236,300
| -40% | -$4.36M |
|
918
PUT
Peabody Energy
BTU
$2.78B
| $6.62M | ﹤0.01% |
200,800
-79,000
| -28% | -$2.76M |
|
919
CALL
Rockwell Automation
ROK
$51.4B
| $6.6M | ﹤0.01% |
18,400
+5,400
| +42% | +$2.13M |
|
920
CALL
Fox Class B
FOX
$20.7B
| $6.6M | ﹤0.01% |
113,100
+99,700
| +744% | +$5.76M |
|
921
CALL
Enphase Energy
ENPH
$4.84B
| $6.58M | ﹤0.01% |
174,100
-289,700
| -62% | -$12M |
|
|
FLG
922
PUT
Flagstar Bank National Association
FLG
$5.77B
| $6.58M | ﹤0.01% |
+499,400
| New | +$6.55M |
|
923
PUT
TTM Technologies
TTMI
$13.6B
| $6.58M | ﹤0.01% |
67,500
+47,300
| +234% | +$4.5M |
|
924
Camtek
CAMT
$6.9B
| $6.55M | ﹤0.01% |
+43,213
| New | +$6.55M |
|
925
Apogee Therapeutics
APGE
$10.2B
| $6.55M | ﹤0.01% |
77,808
+15,009
| +24% | +$1.09M |
|
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.