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 | Held Since | |
|---|---|---|---|---|---|---|---|
6676
CALL
8x8 Inc
EGHT
$334M
| $22.6K | ﹤0.01% |
13,600
+13,000
| +2,167% | +$26.6K |
2024 Q2
7 quarters
|
|
6677
CALL
Clean Energy Fuels
CLNE
$346M
| $22.6K | ﹤0.01% |
9,100
-48,600
| -84% | -$113K |
2021 Q2
19 quarters
|
|
|
XRP
6678
PUT
Bitwise XRP ETF
XRP
$339M
| $22.5K | ﹤0.01% |
+1,500
| New | +$27.1K |
2026 Q1
0 quarters
|
|
6679
PUT
Ingredion
INGR
$5.99B
| $22.5K | ﹤0.01% |
200
-600
| -75% | -$68.9K |
2020 Q1
24 quarters
|
|
|
SEV
6680
PUT
Aptera Motors
SEV
$68.9M
| $22.5K | ﹤0.01% |
8,500
+8,400
| +8,400% | +$22.4K |
2025 Q4
1 quarter
|
|
6681
Astrana Health
ASTH
$1.73B
| $22.5K | ﹤0.01% |
917
+836
| +1,032% | +$19.8K |
2025 Q4
1 quarter
|
|
6682
Twist Bioscience
TWST
$12.5B
| $22.5K | ﹤0.01% |
473
-225
| -32% | -$10.1K |
2025 Q4
1 quarter
|
|
6683
BlackRock TCP Capital
TCPC
$338M
| $22.5K | ﹤0.01% |
+6,223
| New | +$28.9K |
2026 Q1
0 quarters
|
|
|
FPI
6684
PUT
Farmland Partners
FPI
$501M
| $22.5K | ﹤0.01% |
2,000
+1,100
| +122% | +$12.6K |
2018 Q4
29 quarters
|
|
|
RWT
6685
PUT
Redwood Trust
RWT
$458M
| $22.4K | ﹤0.01% |
4,000
-5,200
| -57% | -$30.1K |
2018 Q4
29 quarters
|
|
6686
PUT
Pembina Pipeline
PBA
$26.3B
| $22.4K | ﹤0.01% |
500
-900
| -64% | -$38.2K |
2025 Q4
1 quarter
|
|
6687
MillerKnoll
MLKN
$1.39B
| $22.4K | ﹤0.01% |
1,546
-920
| -37% | -$18.1K |
2025 Q4
1 quarter
|
|
6688
PUT
Taysha Gene Therapies
TSHA
$1.54B
| $22.3K | ﹤0.01% |
5,000
-6,000
| -55% | -$27.9K |
2025 Q4
1 quarter
|
|
|
GAU
6689
Galiano Gold
GAU
$510M
| $22.3K | ﹤0.01% |
8,876
-325,089
| -97% | -$920K |
2025 Q2
3 quarters
|
|
|
ARDT
6690
CALL
Ardent Health
ARDT
$1.45B
| $22.3K | ﹤0.01% |
2,600
+1,800
| +225% | +$16.1K |
2024 Q3
6 quarters
|
|
6691
CALL
Jack in the Box
JACK
$243M
| $22.2K | ﹤0.01% |
2,300
-13,700
| -86% | -$242K |
2014 Q4
45 quarters
|
|
6692
CALL
AnaptysBio
ANAB
$1.45B
| $22.2K | ﹤0.01% |
400
-5,500
| -93% | -$296K |
2024 Q3
6 quarters
|
|
6693
Immersion
IMMR
$243M
| $22.2K | ﹤0.01% |
4,063
-60,701
| -94% | -$383K |
2024 Q3
6 quarters
|
|
6694
Methode Electronics
MEI
$509M
| $22.1K | ﹤0.01% |
+4,009
| New | +$29.3K |
2026 Q1
0 quarters
|
|
|
ASM
6695
CALL
Avino Silver & Gold Mines
ASM
$936M
| $22.1K | ﹤0.01% |
+3,500
| New | +$28K |
2026 Q1
0 quarters
|
|
6696
CALL
Steris
STE
$20.4B
| $22.1K | ﹤0.01% |
100
-400
| -80% | -$97.8K |
2023 Q1
12 quarters
|
|
6697
Tango Therapeutics
TNGX
$4.12B
| $22.1K | ﹤0.01% |
+1,056
| New | +$14.7K |
2026 Q1
0 quarters
|
|
|
BTCZ
6698
T-Rex 2X Inverse Bitcoin Daily Target ETF
BTCZ
$18.3M
| $22.1K | ﹤0.01% |
+4,037
| New | +$20.2K |
2026 Q1
0 quarters
|
|
6699
PUT
Cushman & Wakefield Ltd
CWK
$2.83B
| $22.1K | ﹤0.01% |
+1,800
| New | +$25.8K |
2026 Q1
0 quarters
|
|
6700
Inseego
INSG
$71.8M
| $22.1K | ﹤0.01% |
1,984
-3,944
| -67% | -$44.4K |
2025 Q3
2 quarters
|
|
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'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.