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 | |
|---|---|---|---|---|---|---|
7126
Fate Therapeutics
FATE
$286M
| $15K | ﹤0.01% |
1,504
+139
| +10% | +$2.61K |
|
7127
CALL
Focus Universal
FCUV
$8.15M
| $15K | ﹤0.01% |
9
| – | – |
|
7128
CALL
First Hawaiian
FHB
$3.38B
| $15K | ﹤0.01% |
+600
| New | +$15.4K |
|
7129
PUT
Flowserve
FLS
$9.71B
| $15K | ﹤0.01% |
500
-400
| -44% | -$11.7K |
|
|
GLDD
7130
DELISTED
Great Lakes Dredge & Dock
GLDD
| $15K | ﹤0.01% |
+2,573
| New | +$18.1K |
|
7131
PUT
Gray Television
GTN
$415M
| $15K | ﹤0.01% |
1,400
-20,700
| -94% | -$257K |
|
7132
Garrett Motion
GTX
$5.81B
| $15K | ﹤0.01% |
+2,065
| New | +$14.5K |
|
7133
CALL
Hayward Holdings
HAYW
$3.21B
| $15K | ﹤0.01% |
1,700
-700
| -29% | -$6.5K |
|
7134
CALL
Investcorp Credit Management BDC
ICMB
$11.1M
| $15K | ﹤0.01% |
4,500
+500
| +13% | +$1.9K |
|
7135
Inseego
INSG
$114M
| $15K | ﹤0.01% |
1,877
-2,604
| -58% | -$39.1K |
|
7136
PUT
Korn Ferry
KFY
$4.18B
| $15K | ﹤0.01% |
300
+100
| +50% | +$5.32K |
|
7137
PUT
Leslie's
LESL
$8.9M
| $15K | ﹤0.01% |
65
-650
| -91% | -$181K |
|
7138
Dorian LPG
LPG
$2.03B
| $15K | ﹤0.01% |
831
-26,803
| -97% | -$480K |
|
7139
MarketWise
MKTW
$52.5M
| $15K | ﹤0.01% |
447
+235
| +111% | +$10.2K |
|
7140
CALL
Montauk Renewables
MNTK
$243M
| $15K | ﹤0.01% |
1,400
-4,000
| -74% | -$53.5K |
|
|
MRUS
7141
CALL
DELISTED
Merus
MRUS
| $15K | ﹤0.01% |
1,000
-5,800
| -85% | -$102K |
|
|
MTA
7142
PUT
Metalla Royalty & Streaming
MTA
$688M
| $15K | ﹤0.01% |
3,200
-700
| -18% | -$3.35K |
|
7143
PUT
Magnachip Semiconductor
MX
$119M
| $15K | ﹤0.01% |
1,700
-2,000
| -54% | -$19.3K |
|
7144
CALL
Nomad Foods
NOMD
$1.66B
| $15K | ﹤0.01% |
+900
| New | +$14.3K |
|
7145
PUT
OFS Capital
OFS
$45M
| $15K | ﹤0.01% |
1,500
-4,800
| -76% | -$47K |
|
7146
CALL
Outset Medical
OM
$84.7M
| $15K | ﹤0.01% |
40
-13
| -25% | -$3.67K |
|
7147
CALL
Omeros
OMER
$857M
| $15K | ﹤0.01% |
6,800
-39,500
| -85% | -$109K |
|
7148
OneSpan
OSPN
$574M
| $15K | ﹤0.01% |
1,414
-886
| -39% | -$10.2K |
|
7149
PUT
Pacira BioSciences
PCRX
$1.04B
| $15K | ﹤0.01% |
+400
| New | +$19.5K |
|
7150
Perimeter Solutions
PRM
$4.99B
| $15K | ﹤0.01% |
1,654
+1,464
| +771% | +$12.9K |
|
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.