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 | |
|---|---|---|---|---|---|---|
3951
PUT
PagerDuty
PD
$795M
| $249K | ﹤0.01% |
9,400
-400
| -4% | -$9.45K |
|
3952
PUT
PDS Biotechnology
PDSB
$38.6M
| $249K | ﹤0.01% |
18,900
+18,100
| +2,263% | +$128K |
|
|
SNBR
3953
PUT
DELISTED
Sleep Number
SNBR
| $249K | ﹤0.01% |
9,600
-8,200
| -46% | -$249K |
|
3954
PUT
TransUnion
TRU
$16.1B
| $249K | ﹤0.01% |
4,400
+3,800
| +633% | +$223K |
|
|
WCC
3955
WESCO International
WCC
$16.1B
| $249K | ﹤0.01% |
1,995
-801
| -29% | -$101K |
|
3956
CALL
Braze
BRZE
$2.83B
| $248K | ﹤0.01% |
9,100
+5,200
| +133% | +$145K |
|
3957
Natural Gas Services Group
NGS
$460M
| $248K | ﹤0.01% |
+21,686
| New | +$237K |
|
3958
PUT
NatWest
NWG
$70.6B
| $248K | ﹤0.01% |
38,500
+14,000
| +57% | +$82K |
|
3959
Sportradar
SRAD
$4.38B
| $248K | ﹤0.01% |
24,988
+8,664
| +53% | +$84.5K |
|
|
HCP
3960
CALL
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $248K | ﹤0.01% |
9,100
-76,900
| -89% | -$2.18M |
|
3961
PUT
Banco Macro
BMA
$5.81B
| $247K | ﹤0.01% |
15,100
-10,600
| -41% | -$152K |
|
3962
CleanSpark
CLSK
$3.46B
| $247K | ﹤0.01% |
121,329
+76,800
| +172% | +$199K |
|
3963
PUT
Coursera
COUR
$1.68B
| $247K | ﹤0.01% |
20,900
+12,200
| +140% | +$154K |
|
3964
CALL
Pentair
PNR
$10.8B
| $247K | ﹤0.01% |
5,500
+2,100
| +62% | +$91.3K |
|
3965
CALL
Ramaco Resources Class A
METC
$637M
| $246K | ﹤0.01% |
29,044
+1,964
| +7% | +$19.8K |
|
3966
PUT
Oshkosh
OSK
$9.51B
| $246K | ﹤0.01% |
2,800
-5,500
| -66% | -$472K |
|
|
SA
3967
CALL
Seabridge Gold
SA
$2.69B
| $246K | ﹤0.01% |
19,600
-9,100
| -32% | -$108K |
|
3968
PUT
Autoliv
ALV
$9.09B
| $245K | ﹤0.01% |
3,200
+1,300
| +68% | +$104K |
|
|
GOLD
3969
Gold.com Inc
GOLD
$1.18B
| $245K | ﹤0.01% |
+7,074
| New | +$224K |
|
3970
CALL
Columbia Sportswear
COLM
$3.3B
| $245K | ﹤0.01% |
2,800
+2,400
| +600% | +$193K |
|
3971
CALL
Lithia Motors
LAD
$8.17B
| $245K | ﹤0.01% |
1,200
-5,200
| -81% | -$1.11M |
|
3972
CALL
State Street Multi-Asset Real Return ETF
RLY
$1.25B
| $245K | ﹤0.01% |
6,000
+5,700
| +1,900% | +$160K |
|
3973
CALL
TMC The Metals Company
TMC
$1.56B
| $245K | ﹤0.01% |
318,700
-317,600
| -50% | -$275K |
|
3974
Unity
U
$13.9B
| $245K | ﹤0.01% |
8,591
-47,575
| -85% | -$1.49M |
|
|
RVNC
3975
DELISTED
Revance Therapeutics, Inc.
RVNC
| $245K | ﹤0.01% |
13,321
-34,280
| -72% | -$784K |
|
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.