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 | |
|---|---|---|---|---|---|---|
|
NXRT
7801
NexPoint Residential Trust
NXRT
$661M
| $5.7K | ﹤0.01% |
228
-24,196
| -99% | -$694K |
|
7802
PUT
Procore
PCOR
$6.2B
| $5.7K | ﹤0.01% |
100
-1,100
| -92% | -$65.1K |
|
7803
PUT
Blue Bird Corp
BLBD
$2.45B
| $5.68K | ﹤0.01% |
100
-1,200
| -92% | -$64.7K |
|
7804
PUT
Federated Hermes
FHI
$4.35B
| $5.67K | ﹤0.01% |
+100
| New | +$5.48K |
|
7805
Montauk Renewables
MNTK
$256M
| $5.65K | ﹤0.01% |
+4,915
| New | +$7.41K |
|
7806
CALL
Haemonetics
HAE
$3.52B
| $5.64K | ﹤0.01% |
100
-5,700
| -98% | -$371K |
|
|
IYRI
7807
NEOS Real Estate High Income ETF
IYRI
$299M
| $5.63K | ﹤0.01% |
119
-151
| -56% | -$7.43K |
|
|
JBIO
7808
CALL
Jade Biosciences
JBIO
$1.19B
| $5.62K | ﹤0.01% |
400
+200
| +100% | +$2.9K |
|
7809
PUT
ARS Pharmaceuticals
SPRY
$596M
| $5.62K | ﹤0.01% |
700
-38,300
| -98% | -$367K |
|
7810
CALL
First Bancorp
FNLC
$383M
| $5.61K | ﹤0.01% |
200
| – | – |
|
7811
Xtrackers MSCI Europe Hedged Equity ETF
DBEU
$758M
| $5.6K | ﹤0.01% |
+115
| New | +$5.7K |
|
7812
Hain Celestial
HAIN
$49.1M
| $5.6K | ﹤0.01% |
8,020
-17,224
| -68% | -$16K |
|
7813
CALL
RadNet
RDNT
$4.8B
| $5.59K | ﹤0.01% |
100
-400
| -80% | -$27.3K |
|
|
7814
PUT
RadNet
RDNT
$4.8B
| $5.59K | ﹤0.01% |
100
-20,800
| -100% | -$1.42M |
|
7815
PUT
The Honest Company
HNST
$409M
| $5.59K | ﹤0.01% |
1,900
-600
| -24% | -$1.54K |
|
7816
PUT
American Homes 4 Rent
AMH
$11.9B
| $5.58K | ﹤0.01% |
200
-11,300
| -98% | -$342K |
|
|
ABK
7817
PUT
DELISTED
Ambac Financial Group
ABK
| $5.58K | ﹤0.01% |
1,200
-5,000
| -81% | -$23.3K |
|
7818
PUT
First Financial Bancorp
FFBC
$3.55B
| $5.58K | ﹤0.01% |
+200
| New | +$5.57K |
|
7819
Limoneira
LMNR
$238M
| $5.57K | ﹤0.01% |
415
-4,666
| -92% | -$64.8K |
|
7820
Compass Minerals
CMP
$1.25B
| $5.56K | ﹤0.01% |
238
+134
| +129% | +$3.16K |
|
7821
Nomura Holdings
NMR
$28.6B
| $5.55K | ﹤0.01% |
704
-4,010
| -85% | -$34.5K |
|
7822
CALL
Assembly Biosciences
ASMB
$500M
| $5.55K | ﹤0.01% |
200
-2,300
| -92% | -$65.6K |
|
7823
PUT
AnaptysBio
ANAB
$1.63B
| $5.55K | ﹤0.01% |
100
-5,000
| -98% | -$269K |
|
7824
National Vision
EYE
$1.6B
| $5.54K | ﹤0.01% |
+214
| New | +$5.82K |
|
7825
Valens Semiconductor
VLN
$186M
| $5.54K | ﹤0.01% |
4,904
-1,378
| -22% | -$2.16K |
|
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.