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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4001
CALL
Banco Santander
SAN
$201B
| $318K | ﹤0.01% |
137,300
-2,300
| -2% | -$5.75K |
|
|
EVA
4002
CALL
DELISTED
Enviva Inc.
EVA
| $318K | ﹤0.01% |
5,300
+2,200
| +71% | +$148K |
|
4003
CALL
Popular Inc
BPOP
$11.2B
| $317K | ﹤0.01% |
4,400
-4,800
| -52% | -$373K |
|
4004
PUT
Celldex Therapeutics
CLDX
$2.99B
| $317K | ﹤0.01% |
11,300
-76,100
| -87% | -$2.33M |
|
4005
LPL Financial
LPLA
$28.3B
| $317K | ﹤0.01% |
1,455
-1,910
| -57% | -$406K |
|
4006
PUT
Prospect Capital
PSEC
$1.07B
| $317K | ﹤0.01% |
51,200
+8,400
| +20% | +$62.7K |
|
4007
ZTO Express
ZTO
$18.3B
| $317K | ﹤0.01% |
13,200
-2,049
| -13% | -$53.4K |
|
|
MKFG
4008
CALL
DELISTED
Markforged Holding Corporation
MKFG
| $317K | ﹤0.01% |
16,020
+6,310
| +65% | +$146K |
|
4009
PUT
AeroVironment
AVAV
$7.56B
| $316K | ﹤0.01% |
3,800
-15,900
| -81% | -$1.42M |
|
|
DMC
4010
CALL
Del Monte Corp
DMC
$1.41B
| $316K | ﹤0.01% |
13,600
+13,300
| +4,433% | +$371K |
|
4011
PUT
Gray Television
GTN
$415M
| $316K | ﹤0.01% |
22,100
+19,500
| +750% | +$358K |
|
4012
SiTime
SITM
$16B
| $316K | ﹤0.01% |
+4,017
| New | +$517K |
|
4013
PUT
Sensata Technologies
ST
$6.74B
| $316K | ﹤0.01% |
8,500
+1,200
| +16% | +$50.3K |
|
|
BWIN
4014
PUT
Baldwin Insurance Group
BWIN
$2.69B
| $316K | ﹤0.01% |
+12,000
| New | +$342K |
|
4015
Mid-America Apartment Communities
MAA
$15.4B
| $315K | ﹤0.01% |
2,032
-3,513
| -63% | -$605K |
|
4016
Madrigal Pharmaceuticals
MDGL
$10.8B
| $315K | ﹤0.01% |
4,850
-557
| -10% | -$38.7K |
|
4017
PUT
Upwork
UPWK
$1.13B
| $315K | ﹤0.01% |
23,200
-20,500
| -47% | -$385K |
|
|
VNET
4018
PUT
VNET Group
VNET
$2.04B
| $315K | ﹤0.01% |
57,400
+46,300
| +417% | +$244K |
|
|
VGR
4019
CALL
DELISTED
Vector Group Ltd.
VGR
| $315K | ﹤0.01% |
35,800
-2,200
| -6% | -$22.3K |
|
|
HYZN
4020
DELISTED
Hyzon Motors Inc. Class A Common Stock
HYZN
| $315K | ﹤0.01% |
+3,706
| New | +$487K |
|
|
LFTR
4021
CALL
DELISTED
Lefteris Acquisition Corp. Class A Common Stock
LFTR
| $315K | ﹤0.01% |
31,500
-6,000
| -16% | -$59.7K |
|
4022
Vertical Aerospace
EVTL
$158M
| $314K | ﹤0.01% |
+3,365
| New | +$211K |
|
4023
PUT
Fidelity National Financial
FNF
$13.9B
| $314K | ﹤0.01% |
9,048
-7,384
| -45% | -$276K |
|
4024
PUT
Fox Class B
FOX
$21.8B
| $314K | ﹤0.01% |
10,300
-13,100
| -56% | -$411K |
|
4025
PUT
Glaukos
GKOS
$9.83B
| $314K | ﹤0.01% |
5,900
-37,200
| -86% | -$1.92M |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.