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 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4001
PUT
Payoneer
PAYO
$2.42B
| $550K | ﹤0.01% |
+53,100
| New | +$558K |
|
|
SILV
4002
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $550K | ﹤0.01% |
63,085
-49,008
| -44% | -$448K |
|
|
TWNK
4003
PUT
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $550K | ﹤0.01% |
34,000
+33,741
| +13,027% | +$526K |
|
|
PEI
4004
PUT
DELISTED
Pennsylvania Real Estate Investment Trust
PEI
| $550K | ﹤0.01% |
+14,733
| New | +$480K |
|
4005
Ameriprise Financial
AMP
$48.3B
| $549K | ﹤0.01% |
2,209
+1,195
| +118% | +$301K |
|
4006
CALL
Gentex
GNTX
$5.12B
| $549K | ﹤0.01% |
16,600
+15,835
| +2,070% | +$549K |
|
4007
Lucid Motors
LCID
$3.08B
| $549K | ﹤0.01% |
1,908
-25,670
| -93% | -$5.63M |
|
|
ICPT
4008
PUT
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $549K | ﹤0.01% |
27,500
+27,311
| +14,450% | +$541K |
|
4009
CALL
Janus International
JBI
$732M
| $548K | ﹤0.01% |
+38,800
| New | +$535K |
|
|
LTC
4010
CALL
LTC Properties
LTC
$2.14B
| $548K | ﹤0.01% |
14,300
+14,106
| +7,271% | +$574K |
|
|
PPD
4011
CALL
DELISTED
PPD, Inc. Common Stock
PPD
| $548K | ﹤0.01% |
11,900
+11,636
| +4,408% | +$526K |
|
4012
PUT
Goosehead Insurance
GSHD
$1.63B
| $547K | ﹤0.01% |
4,300
+4,299
| +429,900% | +$438K |
|
4013
PUT
Tenaris
TS
$28.1B
| $547K | ﹤0.01% |
25,000
+23,910
| +2,194% | +$540K |
|
|
PRVB
4014
CALL
DELISTED
Provention Bio, Inc. Common Stock
PRVB
| $547K | ﹤0.01% |
64,900
+63,916
| +6,496% | +$516K |
|
|
AGC
4015
PUT
DELISTED
Altimeter Growth Corp
AGC
| $547K | ﹤0.01% |
46,800
+46,573
| +20,517% | +$570K |
|
4016
CALL
Andersons Inc
ANDE
$2.49B
| $546K | ﹤0.01% |
17,900
+17,818
| +21,729% | +$537K |
|
|
DOYU
4017
DouYu International Holdings
DOYU
$140M
| $546K | ﹤0.01% |
7,986
+5,682
| +247% | +$489K |
|
4018
Wintrust Financial
WTFC
$10.9B
| $546K | ﹤0.01% |
+7,230
| New | +$565K |
|
|
LOTZ
4019
DELISTED
CarLotz, Inc. Class A Common Stock
LOTZ
| $546K | ﹤0.01% |
100,183
-19,355
| -16% | -$122K |
|
|
ABK
4020
CALL
DELISTED
Ambac Financial Group
ABK
| $546K | ﹤0.01% |
34,900
+34,337
| +6,099% | +$537K |
|
4021
PUT
Allot
ALLT
$373M
| $545K | ﹤0.01% |
27,500
+26,652
| +3,143% | +$491K |
|
4022
Unilever
UL
$144B
| $545K | ﹤0.01% |
8,285
+7,859
| +1,845% | +$523K |
|
|
CCEC
4023
Capital Clean Energy Carriers
CCEC
$1.36B
| $545K | ﹤0.01% |
44,698
+31,371
| +235% | +$386K |
|
|
TSE
4024
CALL
DELISTED
Trinseo
TSE
| $544K | ﹤0.01% |
9,100
+8,980
| +7,483% | +$574K |
|
4025
Baxter International
BAX
$12.6B
| $543K | ﹤0.01% |
6,754
-17,220
| -72% | -$1.44M |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.