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 | |
|---|---|---|---|---|---|---|
726
PUT
Take-Two Interactive
TTWO
$43.3B
| $9.4M | 0.01% |
+47,600
| New | +$10.4M |
|
727
PUT
Dollar Tree
DLTR
$23B
| $9.39M | 0.01% |
85,700
-72,300
| -46% | -$8.83M |
|
728
Elbit Systems
ESLT
$38.6B
| $9.38M | 0.01% |
11,042
+10,222
| +1,247% | +$7.87M |
|
729
CALL
Cigna
CI
$76.1B
| $9.36M | 0.01% |
35,100
+6,000
| +21% | +$1.66M |
|
730
PUT
Under Armour Class C
UA
$2.89B
| $9.35M | 0.01% |
1,583,000
-73,600
| -4% | -$464K |
|
731
PUT
Canadian Natural Resources
CNQ
$97.5B
| $9.35M | 0.01% |
191,800
-58,700
| -23% | -$2.41M |
|
732
PUT
Phillips 66
PSX
$83.2B
| $9.31M | 0.01% |
51,100
-90,500
| -64% | -$14.2M |
|
733
CALL
XPeng
XPEV
$11.9B
| $9.24M | 0.01% |
540,100
-1,418,800
| -72% | -$26.3M |
|
734
CALL
United States Copper Index Fund
CPER
$743M
| $9.22M | 0.01% |
+267,900
| New | +$9.57M |
|
735
CALL
POET Technologies
POET
$1.2B
| $9.13M | 0.01% |
1,537,000
-117,000
| -7% | -$759K |
|
736
CALL
Planet Labs
PL
$7.35B
| $9.12M | 0.01% |
326,300
-287,400
| -47% | -$7.35M |
|
737
PUT
CSX Corp
CSX
$98.4B
| $9.12M | 0.01% |
222,100
+22,900
| +11% | +$897K |
|
738
PUT
Rigetti Computing
RGTI
$4.81B
| $9.07M | 0.01% |
645,800
-1,546,800
| -71% | -$29M |
|
739
CALL
AeroVironment
AVAV
$7.65B
| $9.04M | 0.01% |
49,400
+24,400
| +98% | +$6.43M |
|
740
PUT
Datadog
DDOG
$87.4B
| $9.03M | 0.01% |
76,500
-106,900
| -58% | -$13.2M |
|
741
PUT
CleanSpark
CLSK
$3.83B
| $9.02M | 0.01% |
1,059,700
-1,003,900
| -49% | -$10.7M |
|
742
PUT
Kinross Gold
KGC
$28.5B
| $9.01M | 0.01% |
295,300
-69,100
| -19% | -$2.26M |
|
743
CALL
Quanta Services
PWR
$94.7B
| $9M | 0.01% |
16,400
+2,100
| +15% | +$1.08M |
|
|
744
PUT
Cigna
CI
$76.1B
| $8.99M | 0.01% |
33,700
-84,100
| -71% | -$23.3M |
|
745
PUT
Five Below
FIVE
$11.3B
| $8.98M | 0.01% |
39,300
-59,300
| -60% | -$12.4M |
|
746
CALL
Viking Therapeutics
VKTX
$4.04B
| $8.97M | 0.01% |
275,600
-370,600
| -57% | -$11.9M |
|
747
PUT
Colgate-Palmolive
CL
$72.4B
| $8.96M | 0.01% |
105,100
-58,300
| -36% | -$5.2M |
|
748
CALL
Joby Aviation
JOBY
$7B
| $8.95M | 0.01% |
1,084,100
+192,800
| +22% | +$2.17M |
|
749
PUT
Rockwell Automation
ROK
$51.5B
| $8.86M | 0.01% |
24,700
+20,800
| +533% | +$8.21M |
|
750
CALL
The Mosaic Company
MOS
$7.15B
| $8.86M | 0.01% |
347,600
+30,800
| +10% | +$845K |
|
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.