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 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1101
PUT
AstraZeneca
AZN
$255B
| $5.09M | ﹤0.01% |
25,800
-27,850
| -52% | -$5.37M |
|
1102
CALL
Logitech
LOGI
$14.4B
| $5.08M | ﹤0.01% |
55,700
+4,100
| +8% | +$378K |
|
1103
PUT
Tower Semiconductor
TSEM
$26.5B
| $5.07M | ﹤0.01% |
28,900
+3,000
| +12% | +$403K |
|
1104
CALL
Rush Street Interactive
RSI
$2.27B
| $5.07M | ﹤0.01% |
232,900
+90,100
| +63% | +$1.73M |
|
|
VG
1105
PUT
Venture Global Inc
VG
$31.4B
| $5.04M | ﹤0.01% |
319,700
-179,900
| -36% | -$1.93M |
|
1106
CALL
Braze
BRZE
$2.63B
| $5.03M | ﹤0.01% |
213,100
+170,200
| +397% | +$3.68M |
|
1107
CALL
American Conservative Values ETF
ACVF
$153M
| $5.01M | ﹤0.01% |
897,100
+15,400
| +2% | +$762K |
|
1108
PUT
Abercrombie & Fitch
ANF
$5.67B
| $5M | ﹤0.01% |
54,700
-101,200
| -65% | -$9.84M |
|
1109
CALL
Baker Hughes
BKR
$55.5B
| $4.99M | ﹤0.01% |
81,800
-71,300
| -47% | -$4.12M |
|
1110
CALL
Intercontinental Exchange
ICE
$85.4B
| $4.99M | ﹤0.01% |
+31,700
| New | +$5.17M |
|
|
TPH
1111
CALL
DELISTED
Tri Pointe Homes
TPH
| $4.98M | ﹤0.01% |
106,600
+106,500
| +106,500% | +$4.33M |
|
1112
CALL
ATI
ATI
$25.7B
| $4.97M | ﹤0.01% |
34,200
-14,700
| -30% | -$2.05M |
|
|
AXON
1113
CALL
Axon Enterprise
AXON
$34.1B
| $4.97M | ﹤0.01% |
11,700
-35,800
| -75% | -$18.6M |
|
1114
CALL
HEICO Corp Class A
HEI.A
$32.3B
| $4.96M | ﹤0.01% |
18,100
+17,100
| +1,710% | +$4.21M |
|
1115
CALL
Bilibili
BILI
$6.11B
| $4.96M | ﹤0.01% |
219,900
-141,500
| -39% | -$4.08M |
|
1116
CALL
SEALSQ Corp
LAES
$522M
| $4.96M | ﹤0.01% |
1,892,600
-149,800
| -7% | -$585K |
|
1117
PUT
Hertz
HTZ
$599M
| $4.95M | ﹤0.01% |
1,074,300
+104,200
| +11% | +$504K |
|
|
GRMN
1118
PUT
Garmin
GRMN
$56B
| $4.94M | ﹤0.01% |
21,300
+16,900
| +384% | +$3.78M |
|
1119
PUT
Rocket Companies
RKT
$33.1B
| $4.94M | ﹤0.01% |
346,600
-816,600
| -70% | -$14.9M |
|
1120
PUT
Align Technology
ALGN
$10.2B
| $4.94M | ﹤0.01% |
28,800
-32,000
| -53% | -$5.61M |
|
1121
PUT
CAVA Group
CAVA
$6.21B
| $4.93M | ﹤0.01% |
61,000
-22,300
| -27% | -$1.63M |
|
|
LAC
1122
CALL
Lithium Americas
LAC
$955M
| $4.92M | ﹤0.01% |
1,246,400
-217,200
| -15% | -$1.07M |
|
|
ZVOL
1123
PUT
Volatility Premium Plus ETF
ZVOL
$19.1M
| $4.92M | ﹤0.01% |
324,200
-43,000
| -12% | -$424K |
|
1124
PUT
CRH
CRH
$56.2B
| $4.91M | ﹤0.01% |
46,700
-55,700
| -54% | -$6.54M |
|
1125
CALL
Liquidia Corp
LQDA
$6.33B
| $4.9M | ﹤0.01% |
129,900
-252,200
| -66% | -$9.36M |
|
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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's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- 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 2,157 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.