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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
126
PUT
ExxonMobil
XOM
$629B
| $36.9M | 0.1% |
4,815
-2,382
| -33% | -$184K |
|
127
PUT
Elevance Health
ELV
$82.9B
| $36.9M | 0.1% |
1,307
+985
| +306% | +$269K |
|
|
128
NVIDIA
NVDA
$5.02T
| $36.7M | 0.1% |
8,931,240
+7,142,160
| +399% | +$29.6M |
|
129
CALL
Baidu
BIDU
$36.8B
| $36.7M | 0.1% |
3,123
+1,887
| +153% | +$269K |
|
130
CALL
IBM
IBM
$198B
| $36.5M | 0.1% |
2,766
-2,003
| -42% | -$263K |
|
|
131
iShares Russell 2000 ETF
IWM
$82.4B
| $36.4M | 0.1% |
234,093
+116,007
| +98% | +$17.9M |
|
132
CALL
Union Pacific
UNP
$176B
| $36.3M | 0.1% |
2,146
-1,602
| -43% | -$275K |
|
133
CALL
Chipotle Mexican Grill
CMG
$42.5B
| $36.1M | 0.1% |
24,650
-17,800
| -42% | -$251K |
|
|
XYZ
134
CALL
Block Inc
XYZ
$47.8B
| $35.3M | 0.1% |
4,868
-1,800
| -27% | -$126K |
|
135
CALL
Cisco
CSCO
$442B
| $34.5M | 0.09% |
6,302
-1,195
| -16% | -$66K |
|
136
PUT
Philip Morris
PM
$293B
| $34.1M | 0.09% |
4,340
+60
| +1% | +$4.96K |
|
137
PUT
CVS Health
CVS
$137B
| $33.7M | 0.09% |
6,190
-2,418
| -28% | -$130K |
|
138
CALL
Merck
MRK
$312B
| $33.3M | 0.09% |
4,165
+1,843
| +79% | +$141K |
|
139
CALL
PepsiCo
PEP
$184B
| $32.9M | 0.09% |
2,511
-672
| -21% | -$86.1K |
|
|
140
CALL
CVS Health
CVS
$137B
| $32.3M | 0.09% |
5,927
-1,923
| -24% | -$104K |
|
141
CALL
Bristol-Myers Squibb
BMY
$124B
| $32.2M | 0.09% |
7,101
-3,701
| -34% | -$172K |
|
142
CALL
NXP Semiconductors
NXPI
$69B
| $31.8M | 0.09% |
3,253
+1,343
| +70% | +$130K |
|
143
CALL
Wynn Resorts
WYNN
$9.93B
| $31.5M | 0.09% |
2,540
-991
| -28% | -$127K |
|
144
PUT
Twilio
TWLO
$31.2B
| $31.3M | 0.09% |
2,299
-518
| -18% | -$69K |
|
145
CALL
Amgen
AMGN
$198B
| $31.1M | 0.08% |
1,688
+217
| +15% | +$38.9K |
|
146
PUT
Caterpillar
CAT
$410B
| $31.1M | 0.08% |
2,279
-294
| -11% | -$38.8K |
|
147
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.6B
| $31M | 0.08% |
66,230
+36,660
| +124% | +$548K |
|
148
CALL
Gilead Sciences
GILD
$165B
| $30.3M | 0.08% |
4,492
+219
| +5% | +$14.4K |
|
149
PUT
Align Technology
ALGN
$12.5B
| $30.3M | 0.08% |
1,108
+404
| +57% | +$122K |
|
150
CALL
Texas Instruments
TXN
$265B
| $30.3M | 0.08% |
2,641
+425
| +19% | +$47.5K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.