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 | |
|---|---|---|---|---|---|---|
1426
PUT
Ocugen
OCGN
$410M
| $3.85M | ﹤0.01% |
478,900
+477,738
| +41,113% | +$4.03M |
|
1427
Honeywell
HON
$77B
| $3.84M | ﹤0.01% |
18,559
+18,480
| +23,392% | +$3.91M |
|
|
CLR
1428
PUT
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $3.83M | ﹤0.01% |
100,700
+99,749
| +10,489% | +$3.1M |
|
|
TSP
1429
CALL
DELISTED
TuSimple Holdings Inc. Class A Common Stock
TSP
| $3.83M | ﹤0.01% |
+53,700
| New | +$2.31M |
|
1430
CALL
Ericsson
ERIC
$30.7B
| $3.82M | ﹤0.01% |
303,900
+301,059
| +10,597% | +$4.03M |
|
1431
CALL
BioCryst Pharmaceuticals
BCRX
$2.37B
| $3.82M | ﹤0.01% |
+241,800
| New | +$3.29M |
|
1432
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $3.82M | ﹤0.01% |
19,900
+19,675
| +8,744% | +$4.34M |
|
1433
PUT
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $3.82M | ﹤0.01% |
104,600
+103,209
| +7,420% | +$4.85M |
|
|
SAVE
1434
CALL
DELISTED
Spirit Airlines, Inc.
SAVE
| $3.81M | ﹤0.01% |
+125,200
| New | +$4.4M |
|
1435
PUT
Alcon
ALC
$33.1B
| $3.79M | ﹤0.01% |
54,000
+53,338
| +8,057% | +$3.8M |
|
1436
CALL
Sysco
SYY
$39.7B
| $3.79M | ﹤0.01% |
48,800
+47,926
| +5,484% | +$3.87M |
|
1437
PUT
Sonoco
SON
$5.76B
| $3.79M | ﹤0.01% |
56,700
+56,693
| +809,900% | +$3.76M |
|
1438
PUT
Baker Hughes
BKR
$56.8B
| $3.79M | ﹤0.01% |
165,700
+164,726
| +16,912% | +$3.8M |
|
1439
CALL
Root
ROOT
$917M
| $3.79M | ﹤0.01% |
19,444
+19,372
| +26,906% | +$3.66M |
|
1440
CALL
Warner Music
WMG
$13.8B
| $3.79M | ﹤0.01% |
105,100
+105,048
| +202,015% | +$3.77M |
|
|
DCP
1441
CALL
DELISTED
DCP Midstream, LP
DCP
| $3.78M | ﹤0.01% |
123,300
+122,979
| +38,311% | +$3.18M |
|
1442
Broadcom
AVGO
$1.82T
| $3.78M | ﹤0.01% |
79,220
-24,150
| -23% | -$1.12M |
|
1443
Occidental Petroleum
OXY
$57B
| $3.77M | ﹤0.01% |
120,732
-5,113
| -4% | -$137K |
|
1444
CALL
NovoCure
NVCR
$2.04B
| $3.77M | ﹤0.01% |
17,000
+16,739
| +6,413% | +$3.26M |
|
1445
PUT
ZIM Integrated Shipping Services
ZIM
$3B
| $3.77M | ﹤0.01% |
+83,800
| New | +$3.23M |
|
|
HES
1446
CALL
DELISTED
Hess
HES
| $3.76M | ﹤0.01% |
43,100
+42,054
| +4,020% | +$3.39M |
|
1447
NextEra Energy
NEE
$187B
| $3.76M | ﹤0.01% |
51,353
+51,340
| +394,923% | +$3.85M |
|
1448
CALL
Quest Diagnostics
DGX
$25.1B
| $3.76M | ﹤0.01% |
28,500
+28,388
| +25,346% | +$3.72M |
|
1449
CALL
Reliance Steel & Aluminium
RS
$20.8B
| $3.76M | ﹤0.01% |
24,900
+24,505
| +6,204% | +$3.98M |
|
1450
PUT
Realty Income
O
$61.2B
| $3.75M | ﹤0.01% |
57,998
+57,312
| +8,355% | +$3.77M |
|
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.