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 | |
|---|---|---|---|---|---|---|
101
PUT
Union Pacific
UNP
$176B
| $43.5M | 0.12% |
2,571
-1,397
| -35% | -$239K |
|
102
CALL
Goldman Sachs
GS
$320B
| $43.3M | 0.12% |
2,115
-1,804
| -46% | -$357K |
|
103
PUT
Beyond Meat
BYND
$314M
| $43.1M | 0.12% |
+2,682
| New | +$299K |
|
104
CALL
Roku
ROKU
$21.4B
| $42.7M | 0.12% |
4,710
+1,256
| +36% | +$101K |
|
105
PUT
FedEx
FDX
$73.1B
| $42M | 0.11% |
2,561
-493
| -16% | -$86.3K |
|
106
PUT
Deere & Co
DE
$158B
| $42M | 0.11% |
2,535
-40
| -2% | -$6.22K |
|
107
CALL
Electronic Arts
EA
$52.4B
| $41.7M | 0.11% |
4,120
-656
| -14% | -$62.5K |
|
108
CALL
McDonald's
MCD
$188B
| $41.4M | 0.11% |
1,994
-1,280
| -39% | -$254K |
|
|
109
PUT
McDonald's
MCD
$188B
| $41.3M | 0.11% |
1,987
-2,942
| -60% | -$583K |
|
|
STZ.B
110
PUT
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $40.8M | 0.11% |
2,070
+1,079
| +109% | +$210K |
|
111
PUT
Lam Research
LRCX
$403B
| $40.4M | 0.11% |
21,520
+4,390
| +26% | +$83.3K |
|
112
CALL
ServiceNow
NOW
$105B
| $40.4M | 0.11% |
7,360
+3,695
| +101% | +$194K |
|
113
CALL
Citigroup
C
$216B
| $40.2M | 0.11% |
5,747
-4,150
| -42% | -$278K |
|
114
PUT
Broadcom
AVGO
$1.84T
| $39.6M | 0.11% |
13,770
-10,250
| -43% | -$299K |
|
115
CALL
Walmart Inc
WMT
$878B
| $39.4M | 0.11% |
10,701
-3,174
| -23% | -$109K |
|
116
PUT
UnitedHealth
UNH
$396B
| $39.4M | 0.11% |
1,614
+132
| +9% | +$31.7K |
|
|
117
PUT
Citigroup
C
$216B
| $39.1M | 0.11% |
5,577
-4,417
| -44% | -$296K |
|
118
PUT
Altria Group
MO
$125B
| $38.8M | 0.11% |
8,202
+414
| +5% | +$21.7K |
|
119
CALL
Marathon Petroleum
MPC
$92.1B
| $38.8M | 0.11% |
6,950
+4,366
| +169% | +$239K |
|
|
AABA
120
PUT
DELISTED
Altaba Inc
AABA
| $38.7M | 0.11% |
5,583
+4,571
| +452% | +$320K |
|
|
121
PUT
Walmart Inc
WMT
$878B
| $38.4M | 0.1% |
10,434
+4,404
| +73% | +$152K |
|
122
CALL
PayPal
PYPL
$49.3B
| $38.4M | 0.1% |
3,354
-3,152
| -48% | -$349K |
|
123
PUT
Nike
NKE
$63.7B
| $37.2M | 0.1% |
4,432
+156
| +4% | +$13.1K |
|
124
CALL
Caterpillar
CAT
$410B
| $37.1M | 0.1% |
2,722
-1,681
| -38% | -$222K |
|
|
JJT
125
CALL
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $36.9M | 0.1% |
14,177
+4,808
| +51% | +$240K |
|
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.