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 | |
|---|---|---|---|---|---|---|
|
CNTA
2051
PUT
DELISTED
Centessa Pharmaceuticals
CNTA
| $1.55M | ﹤0.01% |
+39,100
| New | +$1M |
|
2052
BigBear.ai
BBAI
$1.36B
| $1.55M | ﹤0.01% |
440,411
+210,186
| +91% | +$976K |
|
2053
PG&E
PCG
$47.2B
| $1.55M | ﹤0.01% |
+88,164
| New | +$1.5M |
|
2054
Molina Healthcare
MOH
$10.4B
| $1.55M | ﹤0.01% |
11,613
+3,056
| +36% | +$486K |
|
2055
CALL
BorgWarner
BWA
$13.1B
| $1.55M | ﹤0.01% |
28,500
+3,300
| +13% | +$174K |
|
2056
CALL
Annaly Capital Management
NLY
$16.9B
| $1.55M | ﹤0.01% |
+73,100
| New | +$1.66M |
|
2057
PUT
Carbon Collective Climate Solutions US Equity ETF
CCSO
$46.4M
| $1.55M | ﹤0.01% |
120,000
+13,800
| +13% | +$365K |
|
2058
Bilibili
BILI
$7.47B
| $1.54M | ﹤0.01% |
68,445
-336,082
| -83% | -$9.69M |
|
2059
PUT
MGIC Investment
MTG
$6.34B
| $1.54M | ﹤0.01% |
58,800
+55,200
| +1,533% | +$1.48M |
|
2060
CALL
FormFactor
FORM
$7.7B
| $1.54M | ﹤0.01% |
15,900
+8,000
| +101% | +$688K |
|
2061
PUT
Ferguson
FERG
$45.4B
| $1.54M | ﹤0.01% |
6,600
+1,400
| +27% | +$341K |
|
|
CNTA
2062
CALL
DELISTED
Centessa Pharmaceuticals
CNTA
| $1.54M | ﹤0.01% |
+38,700
| New | +$990K |
|
2063
PUT
NextNav
NN
$1.73B
| $1.54M | ﹤0.01% |
95,900
+5,500
| +6% | +$89K |
|
2064
PUT
Iron Mountain
IRM
$37.8B
| $1.53M | ﹤0.01% |
15,000
-15,500
| -51% | -$1.54M |
|
2065
PUT
Western Alliance Bancorporation
WAL
$9.04B
| $1.53M | ﹤0.01% |
21,600
-34,800
| -62% | -$2.9M |
|
|
SW
2066
CALL
Smurfit Westrock
SW
$26.3B
| $1.53M | ﹤0.01% |
38,400
-32,800
| -46% | -$1.41M |
|
2067
PUT
Burlington
BURL
$22.5B
| $1.53M | ﹤0.01% |
4,700
-4,900
| -51% | -$1.5M |
|
2068
AstraZeneca
AZN
$263B
| $1.53M | ﹤0.01% |
+7,753
| New | +$1.49M |
|
2069
PUT
Cognizant
CTSH
$22.3B
| $1.53M | ﹤0.01% |
+24,900
| New | +$1.78M |
|
2070
PUT
Century Aluminum
CENX
$4.44B
| $1.53M | ﹤0.01% |
26,000
-26,800
| -51% | -$1.34M |
|
2071
Ramaco Resources Class A
METC
$664M
| $1.52M | ﹤0.01% |
98,490
+63,574
| +182% | +$1.13M |
|
2072
PUT
Travelers Companies
TRV
$81.4B
| $1.52M | ﹤0.01% |
5,200
-18,600
| -78% | -$5.45M |
|
|
LINE
2073
CALL
Lineage Inc
LINE
$9.69B
| $1.51M | ﹤0.01% |
46,200
+18,600
| +67% | +$689K |
|
|
2074
Iron Mountain
IRM
$37.8B
| $1.51M | ﹤0.01% |
14,800
+12,443
| +528% | +$1.24M |
|
2075
Blue Owl Capital
OBDC
$5.42B
| $1.51M | ﹤0.01% |
+136,642
| New | +$1.6M |
|
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.