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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3126
Zeta Global
ZETA
$4.97B
| $802K | ﹤0.01% |
+26,893
| New | +$633K |
|
3127
CALL
Denison Mines
DNN
$2.7B
| $801K | ﹤0.01% |
437,800
-310,200
| -41% | -$545K |
|
3128
Lemonade
LMND
$4.78B
| $799K | ﹤0.01% |
+48,492
| New | +$890K |
|
3129
CALL
Manchester United
MANU
$3.95B
| $799K | ﹤0.01% |
49,400
+26,500
| +116% | +$444K |
|
3130
PUT
Braze
BRZE
$2.62B
| $798K | ﹤0.01% |
24,700
-14,700
| -37% | -$580K |
|
3131
National Fuel Gas
NFG
$7.75B
| $797K | ﹤0.01% |
13,154
+6,952
| +112% | +$406K |
|
|
TLN
3132
Talen Energy Corp
TLN
$16.8B
| $797K | ﹤0.01% |
+4,476
| New | +$631K |
|
|
ENV
3133
PUT
DELISTED
ENVESTNET, INC.
ENV
| $795K | ﹤0.01% |
12,700
+12,600
| +12,600% | +$786K |
|
3134
PUT
Arch Capital
ACGL
$36.4B
| $794K | ﹤0.01% |
7,100
+4,900
| +223% | +$510K |
|
3135
EVgo
EVGO
$210M
| $794K | ﹤0.01% |
191,813
+29,527
| +18% | +$113K |
|
3136
CALL
Keysight
KEYS
$53.1B
| $794K | ﹤0.01% |
5,000
-5,100
| -50% | -$726K |
|
3137
CALL
The Greenbrier Companies
GBX
$1.59B
| $793K | ﹤0.01% |
15,600
-2,500
| -14% | -$119K |
|
3138
CALL
Hess Midstream
HESM
$5.12B
| $793K | ﹤0.01% |
22,500
-1,500
| -6% | -$55K |
|
3139
Sundial Growers
SNDL
$328M
| $792K | ﹤0.01% |
384,821
+146,548
| +62% | +$306K |
|
3140
CALL
Hallador Energy
HNRG
$709M
| $791K | ﹤0.01% |
83,900
+72,100
| +611% | +$513K |
|
3141
UGI
UGI
$8B
| $789K | ﹤0.01% |
31,555
-14,855
| -32% | -$358K |
|
3142
CALL
Agilon Health
AGL
$1.6B
| $788K | ﹤0.01% |
8,028
-1,072
| -12% | -$138K |
|
3143
PUT
Terex
TEX
$7.93B
| $788K | ﹤0.01% |
14,900
-300
| -2% | -$16.6K |
|
3144
PUT
HEICO Corp Class A
HEI.A
$36.3B
| $784K | ﹤0.01% |
3,000
+1,700
| +131% | +$322K |
|
|
LAC
3145
Lithium Americas
LAC
$1B
| $784K | ﹤0.01% |
290,374
+165,040
| +132% | +$419K |
|
|
TEN
3146
Tsakos Energy Navigation Ltd
TEN
$1.16B
| $784K | ﹤0.01% |
31,242
-9,824
| -24% | -$249K |
|
3147
PUT
Cheesecake Factory
CAKE
$4.26B
| $782K | ﹤0.01% |
19,300
-19,900
| -51% | -$757K |
|
3148
PUT
FuboTV Inc
FUBO
$254M
| $782K | ﹤0.01% |
45,925
-8,658
| -16% | -$156K |
|
3149
CALL
Amplify Energy
AMPY
$156M
| $781K | ﹤0.01% |
119,700
-37,600
| -24% | -$261K |
|
3150
CALL
A.O. Smith
AOS
$8.58B
| $781K | ﹤0.01% |
8,700
+2,500
| +40% | +$207K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.