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 | |
|---|---|---|---|---|---|---|
5126
CALL
Torrid Holdings
CURV
$247M
| $97K | ﹤0.01% |
+54,500
| New | +$67.4K |
|
5127
CALL
NatWest
NWG
$71.5B
| $96.8K | ﹤0.01% |
6,500
+2,200
| +51% | +$36.6K |
|
5128
PUT
Bit Digital
BTBT
$484M
| $96.4K | ﹤0.01% |
73,600
-243,300
| -77% | -$447K |
|
|
PEW
5129
GrabAGun Digital Holdings
PEW
$68.5M
| $96.4K | ﹤0.01% |
+32,027
| New | +$97K |
|
5130
Critical Metals Corp
CRML
$853M
| $96.4K | ﹤0.01% |
12,136
-85,780
| -88% | -$988K |
|
5131
CALL
NETGEAR
NTGR
$669M
| $96.1K | ﹤0.01% |
4,400
+1,800
| +69% | +$38.8K |
|
5132
Hamilton Insurance Group
HG
$3.59B
| $96.1K | ﹤0.01% |
+3,220
| New | +$92.7K |
|
5133
PUT
Zai Lab
ZLAB
$2.17B
| $95.9K | ﹤0.01% |
5,100
+600
| +13% | +$11.1K |
|
|
TDAY
5134
CALL
USA Today Co
TDAY
$1.23B
| $95.9K | ﹤0.01% |
13,600
-8,100
| -37% | -$49.6K |
|
5135
Vanguard Small-Cap Growth ETF
VBK
$23.2B
| $95.8K | ﹤0.01% |
317
+228
| +256% | +$71.7K |
|
|
ABK
5136
CALL
DELISTED
Ambac Financial Group
ABK
| $95.8K | ﹤0.01% |
20,600
-258,100
| -93% | -$1.2M |
|
5137
PUT
Children's Place
PLCE
$53.6M
| $95.8K | ﹤0.01% |
28,500
-152,300
| -84% | -$618K |
|
5138
Nomad Foods
NOMD
$1.64B
| $95.5K | ﹤0.01% |
9,936
+1,003
| +11% | +$11.5K |
|
5139
Takeda Pharmaceutical
TAK
$55.1B
| $95.3K | ﹤0.01% |
+5,146
| New | +$90.3K |
|
5140
PUT
Clearfield
CLFD
$421M
| $95.3K | ﹤0.01% |
3,600
+3,500
| +3,500% | +$107K |
|
5141
CALL
Cardiff Oncology
CRDF
$64.3M
| $95.3K | ﹤0.01% |
58,800
-46,700
| -44% | -$95.9K |
|
5142
CALL
Perimeter Solutions
PRM
$5.5B
| $95.2K | ﹤0.01% |
3,900
-200
| -5% | -$5.1K |
|
|
BRR
5143
PUT
ProCap Financial Inc
BRR
$161M
| $95.2K | ﹤0.01% |
45,100
-150,300
| -77% | -$417K |
|
5144
Direxion Auspice Broad Commodity Strategy ETF
COM
$204M
| $95.1K | ﹤0.01% |
+2,834
| New | +$90.2K |
|
5145
CALL
Stepan Co
SCL
$1.31B
| $95K | ﹤0.01% |
1,900
-200
| -10% | -$10.7K |
|
|
TUYA
5146
CALL
Tuya Inc
TUYA
$1.01B
| $94.9K | ﹤0.01% |
41,100
+41,000
| +41,000% | +$93.7K |
|
5147
CALL
Unum
UNM
$13.8B
| $94.9K | ﹤0.01% |
1,300
-3,200
| -71% | -$239K |
|
5148
PUT
Saic
SAIC
$5.03B
| $94.9K | ﹤0.01% |
+1,000
| New | +$98K |
|
5149
PUT
Milestone Pharmaceuticals
MIST
$144M
| $94.8K | ﹤0.01% |
+79,700
| New | +$140K |
|
5150
CALL
Eagle Materials
EXP
$6.6B
| $94.7K | ﹤0.01% |
500
-1,600
| -76% | -$340K |
|
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.