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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
76
PUT
Lam Research
LRCX
$403B
| $58.8M | 0.17% |
25,440
+3,920
| +18% | +$82.3K |
|
77
CALL
Merck
MRK
$312B
| $58.3M | 0.17% |
7,259
+3,094
| +74% | +$248K |
|
78
CALL
Chipotle Mexican Grill
CMG
$42.7B
| $57.5M | 0.16% |
34,200
+9,550
| +39% | +$152K |
|
79
PUT
McDonald's
MCD
$188B
| $57.2M | 0.16% |
2,662
+675
| +34% | +$145K |
|
80
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $56.3M | 0.16% |
2,706
-33
| -1% | -$6.8K |
|
81
PUT
IBM
IBM
$198B
| $56.2M | 0.16% |
4,040
+117
| +3% | +$15.8K |
|
82
PUT
Northrop Grumman
NOC
$74.4B
| $55.2M | 0.16% |
1,473
+890
| +153% | +$315K |
|
83
PUT
Citigroup
C
$223B
| $54.3M | 0.15% |
7,858
+2,281
| +41% | +$155K |
|
84
CALL
ServiceNow
NOW
$105B
| $54.3M | 0.15% |
10,690
+3,330
| +45% | +$181K |
|
85
PUT
Johnson & Johnson
JNJ
$603B
| $53.5M | 0.15% |
4,133
-1,565
| -27% | -$206K |
|
86
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $53.1M | 0.15% |
12,230
-3,984
| -25% | -$216K |
|
|
87
Alibaba
BABA
$283B
| $52.6M | 0.15% |
314,811
+292,680
| +1,322% | +$50.3M |
|
|
STZ.B
88
PUT
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $52.6M | 0.15% |
2,536
+466
| +23% | +$93.1K |
|
89
PUT
Roku
ROKU
$21.4B
| $51.9M | 0.15% |
5,105
+2,003
| +65% | +$245K |
|
90
CALL
Shopify
SHOP
$160B
| $50.7M | 0.14% |
16,260
+7,120
| +78% | +$244K |
|
91
PUT
Micron Technology
MU
$1.1T
| $50.4M | 0.14% |
11,760
-3,792
| -24% | -$171K |
|
92
CALL
Chevron
CVX
$381B
| $50.1M | 0.14% |
4,226
+129
| +3% | +$15.7K |
|
93
CALL
AbbVie
ABBV
$452B
| $49.9M | 0.14% |
6,584
+471
| +8% | +$32.3K |
|
94
CALL
Mastercard
MA
$476B
| $49.8M | 0.14% |
1,834
-165
| -8% | -$45.5K |
|
95
PUT
Walmart Inc
WMT
$878B
| $49.6M | 0.14% |
12,549
+2,115
| +20% | +$79.8K |
|
96
PUT
Equinix
EQIX
$100B
| $49.6M | 0.14% |
860
+686
| +394% | +$369K |
|
97
PUT
AT&T
T
$155B
| $49.6M | 0.14% |
17,350
+8,352
| +93% | +$221K |
|
98
PUT
Blackrock
BLK
$161B
| $48.6M | 0.14% |
1,091
+525
| +93% | +$234K |
|
|
99
CALL
Roku
ROKU
$21.4B
| $48.2M | 0.14% |
4,734
+24
| +0.5% | +$2.94K |
|
100
PUT
UnitedHealth
UNH
$396B
| $47.1M | 0.13% |
2,169
+555
| +34% | +$134K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.