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 | |
|---|---|---|---|---|---|---|
5926
PUT
Medpace
MEDP
$15.1B
| $48K | ﹤0.01% |
100
| – | – |
|
5927
Direxion Daily Mid Cap Bull 3X ETF
MIDU
$73.6M
| $47.9K | ﹤0.01% |
+923
| New | +$53.4K |
|
5928
CALL
Northwest Natural Holdings
NWN
$2.17B
| $47.9K | ﹤0.01% |
900
-2,100
| -70% | -$104K |
|
5929
Camping World
CWH
$398M
| $47.8K | ﹤0.01% |
+7,003
| New | +$72.2K |
|
5930
CALL
Geron
GERN
$905M
| $47.8K | ﹤0.01% |
32,100
-104,900
| -77% | -$159K |
|
5931
TJX Companies
TJX
$172B
| $47.8K | ﹤0.01% |
299
-47,516
| -99% | -$7.4M |
|
|
GLDB
5932
PUT
IDX Alternative FIAT ETF
GLDB
$34.8M
| $47.7K | ﹤0.01% |
13,800
-37,600
| -73% | -$944K |
|
|
CAI
5933
Caris Life Sciences
CAI
$4.35B
| $47.7K | ﹤0.01% |
2,669
-1,930
| -42% | -$42.2K |
|
5934
Zebra Technologies
ZBRA
$12.5B
| $47.7K | ﹤0.01% |
+228
| New | +$53.5K |
|
5935
PUT
First Trust US Equity Opportunities ETF
FPX
$1.54B
| $47.6K | ﹤0.01% |
+300
| New | +$49.3K |
|
5936
PUT
BCB Bancorp
BCBP
$179M
| $47.6K | ﹤0.01% |
+5,300
| New | +$43.3K |
|
5937
AdvisorShares Ranger Equity Bear ETF
HDGE
$64.2M
| $47.5K | ﹤0.01% |
2,649
+975
| +58% | +$16.5K |
|
5938
LCI Industries
LCII
$2.58B
| $47.5K | ﹤0.01% |
386
-902
| -70% | -$123K |
|
5939
RxSight
RXST
$223M
| $47.3K | ﹤0.01% |
7,673
-12,125
| -61% | -$101K |
|
5940
PUT
American Healthcare REIT
AHR
$11B
| $47.2K | ﹤0.01% |
+1,000
| New | +$49.6K |
|
5941
PUT
Melco Resorts & Entertainment
MLCO
$2.12B
| $47.1K | ﹤0.01% |
+8,300
| New | +$50.3K |
|
5942
Immuneering
IMRX
$289M
| $47.1K | ﹤0.01% |
8,942
-4,008
| -31% | -$20.5K |
|
5943
CALL
Telesat
TSAT
$601M
| $47.1K | ﹤0.01% |
1,300
-1,100
| -46% | -$35.4K |
|
5944
Ocular Therapeutix
OCUL
$1.88B
| $47K | ﹤0.01% |
5,555
-10,647
| -66% | -$101K |
|
5945
Direxion Daily NYSE FANG+ Bull 2X ETF
FNGG
$122M
| $47K | ﹤0.01% |
307
-1,619
| -84% | -$291K |
|
5946
ManpowerGroup
MAN
$2.4B
| $47K | ﹤0.01% |
+1,596
| New | +$47.4K |
|
5947
CALL
Real Brokerage
REAX
$410M
| $47K | ﹤0.01% |
18,800
+3,700
| +25% | +$11.2K |
|
|
CRDL
5948
CALL
Cardiol Therapeutics
CRDL
$148M
| $47K | ﹤0.01% |
+34,800
| New | +$35.7K |
|
5949
Korea Electric Power
KEP
$15.2B
| $47K | ﹤0.01% |
3,296
-6,828
| -67% | -$129K |
|
|
ELVA
5950
CALL
Electrovaya
ELVA
$450M
| $46.9K | ﹤0.01% |
+6,000
| New | +$51.9K |
|
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.