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 | |
|---|---|---|---|---|---|---|
4176
PUT
Flowserve
FLS
$8.94B
| $280K | ﹤0.01% |
9,800
-700
| -7% | -$22.3K |
|
4177
CALL
Allot
ALLT
$362M
| $279K | ﹤0.01% |
57,200
+23,200
| +68% | +$135K |
|
4178
CALL
EXL Service
EXLS
$5.46B
| $279K | ﹤0.01% |
9,500
-128,000
| -93% | -$3.62M |
|
4179
FLEX LNG
FLNG
$1.69B
| $279K | ﹤0.01% |
+10,192
| New | +$285K |
|
4180
PUT
Madrigal Pharmaceuticals
MDGL
$12.6B
| $279K | ﹤0.01% |
3,900
-3,500
| -47% | -$257K |
|
|
RDUS
4181
CALL
DELISTED
Radius Recycling
RDUS
| $279K | ﹤0.01% |
8,500
+6,800
| +400% | +$290K |
|
4182
PUT
Sphere Entertainment
SPHR
$5.02B
| $278K | ﹤0.01% |
5,300
-2,000
| -27% | -$135K |
|
4183
CALL
Trinity Industries
TRN
$2.92B
| $278K | ﹤0.01% |
11,500
+900
| +8% | +$24.3K |
|
|
GPP
4184
DELISTED
Green Plains Partners LP
GPP
| $278K | ﹤0.01% |
22,826
+9,956
| +77% | +$131K |
|
4185
CALL
Arvinas
ARVN
$530M
| $277K | ﹤0.01% |
6,600
+5,700
| +633% | +$286K |
|
4186
PUT
MidCap Financial Investment
MFIC
$801M
| $277K | ﹤0.01% |
25,800
-1,200
| -4% | -$14.7K |
|
4187
CALL
Power Integrations
POWI
$3.15B
| $277K | ﹤0.01% |
3,700
-500
| -12% | -$40.6K |
|
4188
Zymeworks
ZYME
$1.62B
| $277K | ﹤0.01% |
52,358
+11,514
| +28% | +$69.6K |
|
4189
SLM Corp
SLM
$4.83B
| $276K | ﹤0.01% |
+17,343
| New | +$300K |
|
4190
Sensient Technologies
SXT
$5.22B
| $276K | ﹤0.01% |
3,437
-4,462
| -56% | -$370K |
|
4191
PUT
Gaming and Leisure Properties
GLPI
$13B
| $275K | ﹤0.01% |
6,000
-40,500
| -87% | -$1.85M |
|
4192
CALL
Lazard
LAZ
$3.96B
| $275K | ﹤0.01% |
8,500
-15,600
| -65% | -$527K |
|
|
NATI
4193
DELISTED
National Instruments Corp
NATI
| $275K | ﹤0.01% |
+8,829
| New | +$313K |
|
|
GLOP
4194
CALL
DELISTED
GASLOG PARTNERS LP
GLOP
| $275K | ﹤0.01% |
49,700
-6,700
| -12% | -$36.8K |
|
|
LONA
4195
PUT
LeonaBio Inc
LONA
$66.1M
| $274K | ﹤0.01% |
9,010
-8,800
| -49% | -$806K |
|
4196
PUT
Avnet
AVT
$6.86B
| $274K | ﹤0.01% |
6,400
+3,300
| +106% | +$144K |
|
4197
PUT
Century Communities
CCS
$1.98B
| $274K | ﹤0.01% |
6,100
+4,000
| +190% | +$202K |
|
4198
PUT
Denison Mines
DNN
$2.43B
| $274K | ﹤0.01% |
282,000
-184,000
| -39% | -$236K |
|
4199
CALL
GrafTech
EAF
$184M
| $274K | ﹤0.01% |
3,880
+2,180
| +128% | +$190K |
|
4200
PUT
Safe Bulkers
SB
$772M
| $274K | ﹤0.01% |
71,800
-98,100
| -58% | -$419K |
|
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.