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 | |
|---|---|---|---|---|---|---|
2126
PUT
Coty
COTY
$2.33B
| $1.45M | ﹤0.01% |
168,900
-134,400
| -44% | -$987K |
|
|
ONEM
2127
PUT
DELISTED
1Life Healthcare
ONEM
| $1.45M | ﹤0.01% |
86,500
+75,100
| +659% | +$1.27M |
|
2128
Kornit Digital
KRNT
$706M
| $1.44M | ﹤0.01% |
62,867
+20,241
| +47% | +$506K |
|
2129
CALL
FirstEnergy
FE
$28.9B
| $1.44M | ﹤0.01% |
34,400
+7,000
| +26% | +$274K |
|
2130
PUT
Royalty Pharma
RPRX
$26.1B
| $1.44M | ﹤0.01% |
36,500
+2,900
| +9% | +$121K |
|
|
AKRO
2131
DELISTED
Akero Therapeutics
AKRO
| $1.44M | ﹤0.01% |
26,286
-52,085
| -66% | -$2.23M |
|
|
ABB
2132
PUT
DELISTED
ABB Ltd
ABB
| $1.44M | ﹤0.01% |
95,700
+11,600
| +14% | +$338K |
|
2133
CALL
Marqeta
MQ
$1.8B
| $1.44M | ﹤0.01% |
58,850
+4,050
| +7% | +$111K |
|
|
NOVA
2134
CALL
DELISTED
Sunnova Energy
NOVA
| $1.44M | ﹤0.01% |
79,900
-161,900
| -67% | -$3.26M |
|
2135
CALL
Clarivate
CLVT
$1.3B
| $1.43M | ﹤0.01% |
172,000
-50,300
| -23% | -$472K |
|
2136
CALL
Harmony Gold Mining
HMY
$9.92B
| $1.43M | ﹤0.01% |
422,000
+223,700
| +113% | +$706K |
|
2137
CALL
Lamar Advertising Co
LAMR
$16.2B
| $1.43M | ﹤0.01% |
15,200
-6,500
| -30% | -$601K |
|
|
KNBE
2138
CALL
DELISTED
KnowBe4, Inc. Class A Common Stock
KNBE
| $1.43M | ﹤0.01% |
57,900
+19,800
| +52% | +$482K |
|
2139
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $1.43M | ﹤0.01% |
3,236
-9,224
| -74% | -$4.08M |
|
2140
AGCO
AGCO
$8.78B
| $1.43M | ﹤0.01% |
10,315
+6,885
| +201% | +$849K |
|
2141
PUT
Macerich
MAC
$7.32B
| $1.42M | ﹤0.01% |
126,500
+19,200
| +18% | +$217K |
|
2142
CALL
Amkor Technology
AMKR
$16.1B
| $1.42M | ﹤0.01% |
59,300
+49,100
| +481% | +$1.14M |
|
|
KRTX
2143
DELISTED
Karuna Therapeutics, Inc. Common Stock
KRTX
| $1.42M | ﹤0.01% |
7,232
+174
| +2% | +$37.3K |
|
2144
CALL
Ionis Pharmaceuticals
IONS
$9.35B
| $1.42M | ﹤0.01% |
37,600
-5,200
| -12% | -$219K |
|
2145
Lumen
LUMN
$6.53B
| $1.42M | ﹤0.01% |
272,180
-418,780
| -61% | -$2.57M |
|
2146
GFL Environmental
GFL
$14.3B
| $1.42M | ﹤0.01% |
+48,571
| New | +$1.32M |
|
2147
PUT
ProShares Ultra S&P500
SSO
$7.82B
| $1.42M | ﹤0.01% |
70,800
-76,200
| -52% | -$1.73M |
|
2148
PUT
Comstock Resources
CRK
$3.97B
| $1.41M | ﹤0.01% |
102,800
-37,400
| -27% | -$638K |
|
|
TTM.RT
2149
CALL
DELISTED
TATA MOTORS LIMITED RT PUR ADR
TTM.RT
| $1.41M | ﹤0.01% |
61,000
-35,000
| -36% | -$808K |
|
2150
Roku
ROKU
$21.1B
| $1.41M | ﹤0.01% |
34,618
-30,691
| -47% | -$1.6M |
|
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.