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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7076
Magnolia Oil & Gas
MGY
$6.09B
| $16K | ﹤0.01% |
699
-60,419
| -99% | -$1.47M |
|
7077
PUT
Nu Skin
NUS
$252M
| $16K | ﹤0.01% |
400
-84,200
| -100% | -$3.24M |
|
7078
PUT
News Corp Class B
NWS
$16.9B
| $16K | ﹤0.01% |
900
+100
| +13% | +$1.76K |
|
|
OTLY
7079
PUT
Oatly Group
OTLY
$465M
| $16K | ﹤0.01% |
485
-3,905
| -89% | -$149K |
|
7080
Pinduoduo
PDD
$126B
| $16K | ﹤0.01% |
200
-15,989
| -99% | -$1.11M |
|
7081
PUT
Pebblebrook Hotel Trust
PEB
$2.15B
| $16K | ﹤0.01% |
1,200
-41,000
| -97% | -$627K |
|
7082
CALL
POSCO
PKX
$16.1B
| $16K | ﹤0.01% |
300
| – | – |
|
|
7083
PUT
POSCO
PKX
$16.1B
| $16K | ﹤0.01% |
300
| – | – |
|
7084
CALL
Procept Biorobotics
PRCT
$1.06B
| $16K | ﹤0.01% |
400
-2,800
| -88% | -$120K |
|
7085
CALL
Quince Therapeutics
QNCX
$22.9M
| $16K | ﹤0.01% |
129
+18
| +16% | +$3.01K |
|
7086
QuantumScape Corp
QS
$3.21B
| $16K | ﹤0.01% |
2,830
| – | – |
|
7087
CALL
Q2 Holdings
QTWO
$3.8B
| $16K | ﹤0.01% |
600
-3,900
| -87% | -$109K |
|
7088
PUT
Remitly
RELY
$4.79B
| $16K | ﹤0.01% |
1,400
+800
| +133% | +$8.3K |
|
7089
Resideo Technologies
REZI
$5.19B
| $16K | ﹤0.01% |
1,001
-33,877
| -97% | -$614K |
|
7090
PUT
Recursion Pharmaceuticals
RXRX
$1.59B
| $16K | ﹤0.01% |
2,100
-7,000
| -77% | -$68.6K |
|
7091
ProShares Short Financials
SEF
$13.1M
| $16K | ﹤0.01% |
+312
| New | +$16.5K |
|
7092
CALL
SGHC Ltd
SGHC
$7.11B
| $16K | ﹤0.01% |
5,500
-1,200
| -18% | -$4.25K |
|
7093
E.W. Scripps
SSP
$257M
| $16K | ﹤0.01% |
1,279
+685
| +115% | +$9.43K |
|
7094
PUT
BlackRock TCP Capital
TCPC
$273M
| $16K | ﹤0.01% |
1,300
-2,300
| -64% | -$28.7K |
|
7095
iShares TIPS Bond ETF
TIP
$14.5B
| $16K | ﹤0.01% |
155
| – | – |
|
7096
CALL
AgEagle Aerial Systems
UAVS
$40.9M
| $16K | ﹤0.01% |
47
-8
| -15% | -$3.62K |
|
7097
UNIFI
UFI
$119M
| $16K | ﹤0.01% |
1,927
-2,467
| -56% | -$21.2K |
|
7098
Frontier Group Holdings
ULCC
$1.55B
| $16K | ﹤0.01% |
+1,631
| New | +$19K |
|
7099
Wheels Up
UP
$208M
| $16K | ﹤0.01% |
82
-131
| -62% | -$33.8K |
|
7100
CALL
Universal Insurance Holdings
UVE
$1.22B
| $16K | ﹤0.01% |
1,600
+400
| +33% | +$4.07K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.