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 |
Apple
AAPL
|
+$286M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$82.3M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$72.6M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$64.2M |
| 5 |
Intel
INTC
|
+$52.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$51.5M |
| 2 |
iShares Silver Trust
SLV
|
+$41.8M |
| 3 |
Ford
F
|
+$26.3M |
| 4 |
United Airlines
UAL
|
+$22.7M |
| 5 |
ExxonMobil
XOM
|
+$22.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.84% |
| 2 | Communication Services | 0.32% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.28% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4126
CALL
Protagonist Therapeutics
PTGX
$8.55B
| $293K | ﹤0.01% |
37,100
+11,900
| +47% | +$144K |
|
|
ALTU
4127
PUT
DELISTED
Altitude Acquisition Corp
ALTU
| $293K | ﹤0.01% |
+29,600
| New | +$295K |
|
4128
iShares MSCI Malaysia ETF
EWM
$307M
| $292K | ﹤0.01% |
13,333
+12,528
| +1,556% | +$300K |
|
4129
CALL
Alphatec Holdings
ATEC
$1.48B
| $291K | ﹤0.01% |
44,600
-10,300
| -19% | -$94.9K |
|
4130
CALL
Blend Labs
BLND
$438M
| $291K | ﹤0.01% |
123,500
-3,800
| -3% | -$14.2K |
|
4131
PUT
Century Aluminum
CENX
$4.22B
| $291K | ﹤0.01% |
39,600
-21,000
| -35% | -$326K |
|
4132
CALL
Skywest
SKYW
$4.35B
| $291K | ﹤0.01% |
13,700
-9,200
| -40% | -$242K |
|
4133
Teekay
TK
$996M
| $291K | ﹤0.01% |
101,066
+94,748
| +1,500% | +$310K |
|
|
DFTX
4134
CALL
Definium Therapeutics
DFTX
$5.6B
| $290K | ﹤0.01% |
30,240
+300
| +1% | +$3.8K |
|
4135
CALL
Garrett Motion
GTX
$5.37B
| $289K | ﹤0.01% |
37,400
+17,500
| +88% | +$118K |
|
4136
PUT
Cactus
WHD
$3.63B
| $289K | ﹤0.01% |
7,200
-4,600
| -39% | -$231K |
|
4137
MarineMax
HZO
$748M
| $288K | ﹤0.01% |
7,978
+5,152
| +182% | +$207K |
|
4138
PUT
iShares Gold Trust
IAU
$62.8B
| $288K | ﹤0.01% |
8,400
+600
| +8% | +$21.3K |
|
4139
PUT
Melco Resorts & Entertainment
MLCO
$2.21B
| $288K | ﹤0.01% |
50,100
+14,100
| +39% | +$82.7K |
|
4140
Noodles & Co
NDLS
$95.1M
| $288K | ﹤0.01% |
+7,666
| New | +$340K |
|
4141
PUT
SBA Communications
SBAC
$19.8B
| $288K | ﹤0.01% |
900
+700
| +350% | +$236K |
|
|
SCPH
4142
DELISTED
scPharmaceuticals
SCPH
| $288K | ﹤0.01% |
59,915
+36,759
| +159% | +$182K |
|
4143
Smith Micro Software
SMSI
$13.6M
| $288K | ﹤0.01% |
2,922
+970
| +50% | +$113K |
|
4144
Amplify CWP Enhanced Dividend Income ETF
DIVO
$7.45B
| $287K | ﹤0.01% |
8,576
+8,197
| +2,163% | +$292K |
|
4145
PUT
Oshkosh
OSK
$8.82B
| $287K | ﹤0.01% |
3,500
| – | – |
|
4146
CALL
Payoneer
PAYO
$2.41B
| $287K | ﹤0.01% |
73,400
+11,400
| +18% | +$50.8K |
|
4147
CALL
ACM Research
ACMR
$4.51B
| $286K | ﹤0.01% |
17,000
-17,600
| -51% | -$271K |
|
4148
Delek Logistics
DKL
$3.12B
| $286K | ﹤0.01% |
+5,882
| New | +$297K |
|
4149
CALL
SES AI
SES
$187M
| $286K | ﹤0.01% |
72,800
+39,100
| +116% | +$250K |
|
|
CONN
4150
CALL
DELISTED
Conn's Inc.
CONN
| $286K | ﹤0.01% |
35,700
+16,800
| +89% | +$221K |
|
Similar funds
Simplex Trading's Q2 2022 Portfolio in Review
As of Q2 2022, Simplex Trading held 11,810 positions worth $94.1B, down 14% from $109B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $11.3B of net new capital in Q2 2022, opening 1,405 new positions and adding to 4,027 existing holdings. Its largest new stake was Alphabet (Google) Class C: 543,540 shares worth $59.4M.
By sector, the portfolio is most concentrated in Technology at 0.84% of assets, up from 0.67% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was United Airlines, an estimated $22.7M trimmed.
- Simplex Trading's largest Q2 2022 buy was Alphabet (Google) Class C: 543,540 shares worth $59.4M.
- Simplex Trading added most to Apple in Q2 2022, an estimated $286M increase.
- Simplex Trading's biggest Q2 2022 reduction was United Airlines, cutting an estimated $22.7M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2022, selling an estimated $51.5M.
- Simplex Trading's ten largest holdings make up 40% of its $94.1B portfolio in Q2 2022.
- Simplex Trading opened 1,405 new positions and closed 1,792 in Q2 2022.
- Simplex Trading's portfolio value fell 14% quarter-over-quarter to $94.1B.
Based on Simplex Trading's 13F filing for Q2 2022, filed 3 Aug 2022.