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 | |
|---|---|---|---|---|---|---|
1126
Pan American Silver
PAAS
$18.6B
| $4.9M | ﹤0.01% |
89,714
+1,822
| +2% | +$105K |
|
1127
CALL
nVent Electric
NVT
$24.5B
| $4.9M | ﹤0.01% |
41,400
+35,000
| +547% | +$3.97M |
|
1128
CALL
Aflac
AFL
$63.9B
| $4.89M | ﹤0.01% |
44,600
-27,500
| -38% | -$3.05M |
|
1129
CALL
Lumen
LUMN
$6.53B
| $4.89M | ﹤0.01% |
703,100
-535,200
| -43% | -$4.05M |
|
1130
Eos Energy Enterprises
EOSE
$1.23B
| $4.88M | ﹤0.01% |
984,329
-1,264,605
| -56% | -$13.6M |
|
1131
PUT
Plains All American Pipeline
PAA
$17.4B
| $4.87M | ﹤0.01% |
218,300
+84,400
| +63% | +$1.72M |
|
1132
Norwegian Cruise Line
NCLH
$8.89B
| $4.87M | ﹤0.01% |
+260,450
| New | +$5.69M |
|
1133
CALL
Cogent Communications
CCOI
$594M
| $4.87M | ﹤0.01% |
258,400
-6,100
| -2% | -$134K |
|
1134
CALL
Sibanye-Stillwater
SBSW
$5.92B
| $4.85M | ﹤0.01% |
394,000
-54,400
| -12% | -$847K |
|
1135
CALL
Cavco Industries
CVCO
$4.39B
| $4.84M | ﹤0.01% |
10,000
+9,800
| +4,900% | +$5.56M |
|
1136
iShares 7-10 Year Treasury Bond ETF
IEF
$47.1B
| $4.83M | ﹤0.01% |
+50,658
| New | +$4.87M |
|
1137
lululemon athletica
LULU
$13B
| $4.83M | ﹤0.01% |
31,540
-42,377
| -57% | -$7.6M |
|
1138
CALL
Cognizant
CTSH
$21.5B
| $4.81M | ﹤0.01% |
+78,400
| New | +$5.61M |
|
1139
PUT
Ionis Pharmaceuticals
IONS
$9.35B
| $4.8M | ﹤0.01% |
63,900
-18,700
| -23% | -$1.48M |
|
|
MDLN
1140
CALL
Medline Inc
MDLN
$32.8B
| $4.79M | ﹤0.01% |
107,600
+58,500
| +119% | +$2.58M |
|
1141
CALL
Welltower
WELL
$178B
| $4.78M | ﹤0.01% |
24,200
-4,200
| -15% | -$830K |
|
1142
PUT
Mobileye
MBLY
$2.03B
| $4.78M | ﹤0.01% |
696,200
+273,900
| +65% | +$2.48M |
|
1143
UBS Group
UBS
$170B
| $4.78M | ﹤0.01% |
122,318
+69,288
| +131% | +$2.97M |
|
|
GLXY
1144
CALL
Galaxy Digital Inc
GLXY
$4.34B
| $4.77M | ﹤0.01% |
258,800
-575,300
| -69% | -$13.7M |
|
1145
CALL
Procore
PCOR
$6.46B
| $4.77M | ﹤0.01% |
83,700
-24,000
| -22% | -$1.42M |
|
1146
Arm
ARM
$278B
| $4.76M | ﹤0.01% |
31,465
-121,951
| -79% | -$14.8M |
|
1147
CALL
McKesson
MCK
$98.5B
| $4.76M | ﹤0.01% |
5,500
-27,000
| -83% | -$24.1M |
|
1148
PUT
Ally Financial
ALLY
$13.1B
| $4.76M | ﹤0.01% |
121,300
-47,000
| -28% | -$1.93M |
|
1149
First Majestic Silver
AG
$8.05B
| $4.76M | ﹤0.01% |
221,445
+212,138
| +2,279% | +$4.89M |
|
|
TLN
1150
CALL
Talen Energy Corp
TLN
$17.2B
| $4.76M | ﹤0.01% |
14,900
-22,500
| -60% | -$7.94M |
|
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.