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 | |
|---|---|---|---|---|---|---|
8176
CALL
Kemper
KMPR
$1.61B
| $3.06K | ﹤0.01% |
+100
| New | +$3.42K |
|
8177
Vertex
VERX
$1.79B
| $3.06K | ﹤0.01% |
+257
| New | +$4K |
|
8178
PUT
Pennant Group
PNTG
$1.41B
| $3.05K | ﹤0.01% |
+100
| New | +$3.09K |
|
8179
CALL
York Water
YORW
$505M
| $3.04K | ﹤0.01% |
100
| – | – |
|
|
TEF
8180
CALL
DELISTED
Telefonica
TEF
| $3.04K | ﹤0.01% |
700
-500
| -42% | -$1.96K |
|
8181
Hanmi Financial
HAFC
$934M
| $3.03K | ﹤0.01% |
115
+110
| +2,200% | +$2.96K |
|
|
SMC
8182
PUT
Summit Midstream
SMC
$418M
| $3.02K | ﹤0.01% |
+100
| New | +$2.92K |
|
|
DOGD
8183
DELISTED
Tradr 2X Long DDOG Daily ETF
DOGD
| $3.02K | ﹤0.01% |
+188
| New | +$3.56K |
|
8184
PUT
Extreme Networks
EXTR
$3.98B
| $3.02K | ﹤0.01% |
200
-2,800
| -93% | -$41.8K |
|
8185
CALL
iMGP DBi Managed Futures Strategy ETF
DBMF
$3.95B
| $3.02K | ﹤0.01% |
+100
| New | +$3K |
|
8186
PIMCO 15+ Year US TIPS Index Exchange-Traded Fund
LTPZ
$699M
| $3.01K | ﹤0.01% |
59
-1,631
| -97% | -$85.1K |
|
8187
CALL
Haleon
HLN
$43.5B
| $3K | ﹤0.01% |
300
-5,400
| -95% | -$56.2K |
|
8188
PUT
Key Tronic
KTCC
$42.2M
| $3K | ﹤0.01% |
1,100
-2,800
| -72% | -$7.97K |
|
8189
Sportsman's Warehouse
SPWH
$46M
| $2.97K | ﹤0.01% |
2,109
+1,419
| +206% | +$1.92K |
|
8190
CALL
BayCom
BCML
$363M
| $2.97K | ﹤0.01% |
+100
| New | +$2.94K |
|
|
MTLS
8191
PUT
Materialise
MTLS
$377M
| $2.96K | ﹤0.01% |
600
+400
| +200% | +$2.16K |
|
8192
Korn Ferry
KFY
$3.96B
| $2.96K | ﹤0.01% |
47
-287
| -86% | -$18.5K |
|
8193
PUT
Greystone Housing Impact Investors LP
GHI
$121M
| $2.95K | ﹤0.01% |
+600
| New | +$4.35K |
|
8194
CALL
Zedge
ZDGE
$39.5M
| $2.93K | ﹤0.01% |
1,000
-8,400
| -89% | -$27.1K |
|
|
FSP
8195
CALL
Franklin Street Properties
FSP
$46.8M
| $2.93K | ﹤0.01% |
4,400
-700
| -14% | -$542 |
|
8196
CALL
Centuri Holdings
CTRI
$2.81B
| $2.92K | ﹤0.01% |
100
-3,600
| -97% | -$105K |
|
|
8197
PUT
Centuri Holdings
CTRI
$2.81B
| $2.92K | ﹤0.01% |
+100
| New | +$2.91K |
|
|
XRPZ
8198
PUT
Franklin XRP ETF
XRPZ
$178M
| $2.92K | ﹤0.01% |
+200
| New | +$3.5K |
|
|
GPMT
8199
PUT
Granite Point Mortgage Trust
GPMT
$67.1M
| $2.9K | ﹤0.01% |
2,000
+1,900
| +1,900% | +$3.66K |
|
8200
PUT
Neuronetics
STIM
$129M
| $2.9K | ﹤0.01% |
2,000
-5,100
| -72% | -$8.08K |
|
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.