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 | |
|---|---|---|---|---|---|---|
8501
Arcosa
ACA
$7.11B
| $1.38K | ﹤0.01% |
+13
| New | +$1.48K |
|
|
NOA
8502
PUT
North American Construction
NOA
$358M
| $1.35K | ﹤0.01% |
+100
| New | +$1.53K |
|
8503
Valaris
VAL
$5.41B
| $1.34K | ﹤0.01% |
84
| – | – |
|
8504
PUT
TaskUs
TASK
$533M
| $1.34K | ﹤0.01% |
+200
| New | +$2.12K |
|
8505
ProShares Ultra MSCI EAFE
EFO
$28.8M
| $1.33K | ﹤0.01% |
+21
| New | +$1.44K |
|
8506
CALL
Allot
ALLT
$398M
| $1.33K | ﹤0.01% |
200
-9,400
| -98% | -$82.8K |
|
|
8507
PUT
Allot
ALLT
$398M
| $1.33K | ﹤0.01% |
200
-200
| -50% | -$1.76K |
|
|
LTCC
8508
CALL
Canary Litecoin ETF
LTCC
$5.4M
| $1.32K | ﹤0.01% |
100
-100
| -50% | -$1.5K |
|
|
TBHC
8509
DELISTED
The Brand House Collective
TBHC
| $1.32K | ﹤0.01% |
+1,418
| New | +$1.57K |
|
8510
Otter Tail
OTTR
$3.83B
| $1.32K | ﹤0.01% |
15
-384
| -96% | -$33.2K |
|
8511
OneWater Marine
ONEW
$222M
| $1.31K | ﹤0.01% |
+139
| New | +$1.62K |
|
8512
MasterBrand
MBC
$1.07B
| $1.31K | ﹤0.01% |
158
-85,520
| -100% | -$924K |
|
8513
PUT
Offerpad Solutions
OPAD
$24.4M
| $1.31K | ﹤0.01% |
200
-230
| -53% | -$2.26K |
|
8514
CALL
Hackett Group
HCKT
$256M
| $1.3K | ﹤0.01% |
+100
| New | +$1.6K |
|
8515
VanEck Bitcoin Trust
HODL
$1.11B
| $1.28K | ﹤0.01% |
67
-211
| -76% | -$4.56K |
|
8516
PUT
Puma Biotechnology
PBYI
$422M
| $1.28K | ﹤0.01% |
200
| – | – |
|
8517
Oramed Pharmaceuticals
ORMP
$168M
| $1.27K | ﹤0.01% |
374
-771
| -67% | -$2.62K |
|
8518
Scansource
SCSC
$1.1B
| $1.27K | ﹤0.01% |
35
-64
| -65% | -$2.45K |
|
8519
State Street SPDR Portfolio Emerging Markets ETF
SPEM
$17.3B
| $1.27K | ﹤0.01% |
+27
| New | +$1.31K |
|
8520
Pacira BioSciences
PCRX
$997M
| $1.26K | ﹤0.01% |
+56
| New | +$1.25K |
|
8521
CALL
Enanta Pharmaceuticals
ENTA
$383M
| $1.26K | ﹤0.01% |
100
| – | – |
|
8522
PUT
Funko
FNKO
$324M
| $1.26K | ﹤0.01% |
400
-280,500
| -100% | -$1.12M |
|
8523
KLX Energy Services
KLXE
$43.1M
| $1.25K | ﹤0.01% |
+483
| New | +$1.22K |
|
|
AIRJ
8524
PUT
Montana Technologies Corp
AIRJ
$273M
| $1.25K | ﹤0.01% |
500
-200
| -29% | -$675 |
|
8525
Atlantic Union Bankshares
AUB
$6.13B
| $1.25K | ﹤0.01% |
+35
| New | +$1.32K |
|
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.