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 |
Apple
AAPL
|
+$179M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$90.1M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$56M |
| 4 |
iShares Silver Trust
SLV
|
+$41.7M |
| 5 |
Advanced Micro Devices
AMD
|
+$39.8M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.8M |
| 2 |
Verizon
VZ
|
+$42.5M |
| 3 |
Occidental Petroleum
OXY
|
+$34.7M |
| 4 |
iShares China Large-Cap ETF
FXI
|
+$33M |
| 5 |
Direxion Daily S&P 500 Bull 3x ETF
SPXL
|
+$32.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.67% |
| 2 | Consumer Discretionary | 0.37% |
| 3 | Industrials | 0.24% |
| 4 | Healthcare | 0.22% |
| 5 | Financials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2001
CALL
Joby Aviation
JOBY
$6.82B
| $2.23M | ﹤0.01% |
336,400
+145,100
| +76% | +$749K |
|
2002
CALL
GFL Environmental
GFL
$14.3B
| $2.23M | ﹤0.01% |
68,400
+60,300
| +744% | +$1.89M |
|
2003
CALL
Elastic
ESTC
$6.1B
| $2.22M | ﹤0.01% |
25,000
+15,400
| +160% | +$1.38M |
|
|
WE
2004
PUT
DELISTED
WeWork Inc.
WE
| $2.22M | ﹤0.01% |
8,148
+443
| +6% | +$127K |
|
2005
CALL
Anavex Life Sciences
AVXL
$222M
| $2.22M | ﹤0.01% |
180,500
+126,500
| +234% | +$1.56M |
|
2006
Merck
MRK
$324B
| $2.22M | ﹤0.01% |
27,072
-376,046
| -93% | -$29.6M |
|
2007
PUT
Sherwin-Williams
SHW
$78.3B
| $2.22M | ﹤0.01% |
8,900
-33,700
| -79% | -$9.31M |
|
2008
PUT
Nutanix
NTNX
$14.9B
| $2.22M | ﹤0.01% |
82,800
+12,700
| +18% | +$340K |
|
2009
PUT
Huntsman Corp
HUN
$2.24B
| $2.22M | ﹤0.01% |
59,100
+8,400
| +17% | +$316K |
|
2010
PUT
Aurinia Pharmaceuticals
AUPH
$1.97B
| $2.21M | ﹤0.01% |
178,700
+5,100
| +3% | +$78.8K |
|
|
SAVE
2011
CALL
DELISTED
Spirit Airlines, Inc.
SAVE
| $2.21M | ﹤0.01% |
101,100
-66,400
| -40% | -$1.52M |
|
2012
Neurocrine Biosciences
NBIX
$17.7B
| $2.21M | ﹤0.01% |
+23,559
| New | +$2M |
|
|
NBIS
2013
PUT
Nebius Group N.V.
NBIS
$47.7B
| $2.2M | ﹤0.01% |
65,900
+13,200
| +25% | +$627K |
|
2014
Uranium Energy
UEC
$4.71B
| $2.2M | ﹤0.01% |
479,713
+435,242
| +979% | +$1.6M |
|
|
VYGG
2015
CALL
DELISTED
Vy Global Growth
VYGG
| $2.2M | ﹤0.01% |
222,200
+131,500
| +145% | +$1.29M |
|
|
HA
2016
CALL
DELISTED
Hawaiian Holdings, Inc.
HA
| $2.2M | ﹤0.01% |
111,500
+41,400
| +59% | +$768K |
|
2017
CALL
Toll Brothers
TOL
$14B
| $2.19M | ﹤0.01% |
46,700
-10,600
| -18% | -$594K |
|
2018
Twilio
TWLO
$29.1B
| $2.19M | ﹤0.01% |
13,283
-7,648
| -37% | -$1.39M |
|
2019
Vistra
VST
$55.1B
| $2.19M | ﹤0.01% |
94,120
-1,805
| -2% | -$40K |
|
2020
CALL
Workhorse Group
WKHS
$29.5M
| $2.19M | ﹤0.01% |
146
-53
| -27% | -$584K |
|
|
IGMS
2021
PUT
DELISTED
IGM Biosciences
IGMS
| $2.19M | ﹤0.01% |
81,800
+81,700
| +81,700% | +$1.52M |
|
2022
CALL
Navios Maritime Partners
NMM
$2.25B
| $2.19M | ﹤0.01% |
62,100
+15,300
| +33% | +$462K |
|
2023
PUT
Gaming and Leisure Properties
GLPI
$12.8B
| $2.18M | ﹤0.01% |
46,500
+41,800
| +889% | +$1.88M |
|
2024
PUT
StoneCo
STNE
$2.62B
| $2.18M | ﹤0.01% |
186,500
+63,300
| +51% | +$827K |
|
2025
Vanguard Short-Term Inflation-Protected Securities Index Fund
VTIP
$19.1B
| $2.18M | ﹤0.01% |
42,518
-2,813
| -6% | -$144K |
|
Similar funds
Simplex Trading's Q1 2022 Portfolio in Review
As of Q1 2022, Simplex Trading held 12,038 positions worth $109B, up 10% from $99B the previous quarter. Its ten largest holdings account for 37% of the portfolio.
Simplex Trading deployed $17.5B of net new capital in Q1 2022, opening 1,603 new positions and adding to 4,441 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 652,921 shares worth $86.2M.
By sector, the portfolio is most concentrated in Technology at 0.67% of assets, up from 0.61% a quarter earlier, followed by Consumer Discretionary and Industrials.
On the sell side, the largest reduction was Verizon, an estimated $42.5M trimmed.
- Simplex Trading's largest Q1 2022 buy was iShares 20+ Year Treasury Bond ETF: 652,921 shares worth $86.2M.
- Simplex Trading added most to Apple in Q1 2022, an estimated $179M increase.
- Simplex Trading's biggest Q1 2022 reduction was Verizon, cutting an estimated $42.5M.
- Simplex Trading fully exited State Street Financial Select Sector SPDR ETF in Q1 2022, selling an estimated $42.8M.
- Simplex Trading's ten largest holdings make up 37% of its $109B portfolio in Q1 2022.
- Simplex Trading opened 1,603 new positions and closed 1,637 in Q1 2022.
- Simplex Trading's portfolio value rose 10% quarter-over-quarter to $109B.
Based on Simplex Trading's 13F filing for Q1 2022, filed 2 May 2022.