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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2151
PUT
Extra Space Storage
EXR
$31.2B
| $2.59M | ﹤0.01% |
17,600
+16,900
| +2,414% | +$2.46M |
|
|
SMAR
2152
CALL
DELISTED
Smartsheet Inc.
SMAR
| $2.58M | ﹤0.01% |
67,100
+17,700
| +36% | +$772K |
|
2153
CALL
Asana
ASAN
$1.58B
| $2.58M | ﹤0.01% |
166,600
-38,600
| -19% | -$691K |
|
|
HTGCR
2154
CALL
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $2.58M | ﹤0.01% |
139,700
+5,200
| +4% | +$95.9K |
|
2155
CALL
Jones Lang LaSalle
JLL
$15.1B
| $2.58M | ﹤0.01% |
13,200
-24,800
| -65% | -$4.51M |
|
2156
Organon & Co
OGN
$3.55B
| $2.56M | ﹤0.01% |
136,418
+6,323
| +5% | +$109K |
|
2157
Darling Ingredients
DAR
$9.93B
| $2.56M | ﹤0.01% |
55,111
+54,992
| +46,212% | +$2.42M |
|
2158
CALL
Ardelyx
ARDX
$1.24B
| $2.56M | ﹤0.01% |
350,900
+39,600
| +13% | +$339K |
|
2159
CALL
Credicorp
BAP
$30.9B
| $2.56M | ﹤0.01% |
15,100
+11,300
| +297% | +$1.82M |
|
2160
CALL
Aspen Aerogels
ASPN
$387M
| $2.55M | ﹤0.01% |
145,100
+111,700
| +334% | +$1.65M |
|
2161
CALL
Pilgrim's Pride
PPC
$6.82B
| $2.55M | ﹤0.01% |
74,300
+70,700
| +1,964% | +$2.12M |
|
2162
PUT
Snap-on
SNA
$20.9B
| $2.55M | ﹤0.01% |
8,600
+4,400
| +105% | +$1.25M |
|
2163
CALL
Xponential Fitness
XPOF
$265M
| $2.55M | ﹤0.01% |
154,000
+88,900
| +137% | +$1.09M |
|
2164
Ventas
VTR
$48.9B
| $2.55M | ﹤0.01% |
58,490
+6,630
| +13% | +$301K |
|
2165
CALL
Eldorado Gold
EGO
$8.31B
| $2.54M | ﹤0.01% |
180,400
+40,100
| +29% | +$487K |
|
2166
CALL
American Eagle Outfitters
AEO
$2.85B
| $2.54M | ﹤0.01% |
98,300
-265,600
| -73% | -$5.9M |
|
2167
CALL
Textron
TXT
$16.6B
| $2.53M | ﹤0.01% |
26,400
-40,600
| -61% | -$3.51M |
|
|
KEEL
2168
CALL
Keel Infrastructure Corp
KEEL
$2.57B
| $2.53M | ﹤0.01% |
1,135,400
+63,800
| +6% | +$166K |
|
2169
CALL
Annaly Capital Management
NLY
$16.9B
| $2.53M | ﹤0.01% |
128,500
-205,700
| -62% | -$3.97M |
|
2170
CALL
Applied Industrial Technologies
AIT
$12.8B
| $2.53M | ﹤0.01% |
12,800
+11,200
| +700% | +$2.05M |
|
2171
CALL
Yelp
YELP
$1.38B
| $2.52M | ﹤0.01% |
64,100
-98,500
| -61% | -$4.08M |
|
2172
PUT
Neurocrine Biosciences
NBIX
$17.7B
| $2.52M | ﹤0.01% |
18,300
+6,600
| +56% | +$901K |
|
2173
CALL
Par Pacific Holdings
PARR
$3.88B
| $2.52M | ﹤0.01% |
68,100
+34,300
| +101% | +$1.26M |
|
|
APLT
2174
CALL
DELISTED
Applied Therapeutics
APLT
| $2.52M | ﹤0.01% |
370,800
+350,600
| +1,736% | +$1.57M |
|
2175
CALL
Charles River Laboratories
CRL
$10.9B
| $2.52M | ﹤0.01% |
9,300
-17,400
| -65% | -$4.16M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.