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 | |
|---|---|---|---|---|---|---|
51
CALL
State Street SPDR NYSE Technology ETF
XNTK
$2.15B
| $88.5M | 0.25% |
23,500
+2,008
| +9% | +$148K |
|
52
PUT
Beyond Meat
BYND
$312M
| $88.1M | 0.25% |
5,927
+3,245
| +121% | +$534K |
|
53
PUT
iShares MSCI Australia ETF
EWA
$1.35B
| $83.9M | 0.24% |
21,931
-3,399
| -13% | -$75.1K |
|
54
PUT
Procter & Gamble
PG
$349B
| $83.5M | 0.24% |
6,714
+1,194
| +22% | +$141K |
|
55
PUT
Walt Disney
DIS
$168B
| $82.2M | 0.23% |
6,321
-2,268
| -26% | -$314K |
|
56
CALL
UnitedHealth
UNH
$394B
| $79.2M | 0.23% |
3,643
+1,512
| +71% | +$365K |
|
|
57
CALL
Beyond Meat
BYND
$312M
| $78.4M | 0.22% |
5,272
+2,559
| +94% | +$421K |
|
58
CALL
McDonald's
MCD
$188B
| $77.7M | 0.22% |
3,617
+1,623
| +81% | +$348K |
|
|
59
PUT
FedEx
FDX
$76.2B
| $77M | 0.22% |
5,287
+2,726
| +106% | +$440K |
|
60
PUT
Broadcom
AVGO
$1.84T
| $76.3M | 0.22% |
27,640
+13,870
| +101% | +$394K |
|
61
PUT
Mastercard
MA
$473B
| $73.4M | 0.21% |
2,701
-186
| -6% | -$51.3K |
|
62
CALL
Costco
COST
$411B
| $72.4M | 0.21% |
2,513
+609
| +32% | +$171K |
|
63
CALL
JPMorgan Chase
JPM
$919B
| $72.2M | 0.21% |
6,871
+1,340
| +24% | +$152K |
|
64
PUT
Mercado Libre
MELI
$91.5B
| $71.5M | 0.2% |
1,297
-1,422
| -52% | -$862K |
|
65
CALL
PayPal
PYPL
$49B
| $67.8M | 0.19% |
6,545
+3,191
| +95% | +$352K |
|
66
CALL
Adobe
ADBE
$88.5B
| $67.7M | 0.19% |
2,451
+59
| +2% | +$17.2K |
|
67
PUT
AutoZone
AZO
$49.2B
| $67.6M | 0.19% |
623
+513
| +466% | +$575K |
|
68
PUT
Intuitive Surgical
ISRG
$123B
| $66.2M | 0.19% |
3,678
+444
| +14% | +$76.8K |
|
|
69
PUT
Biogen
BIIB
$29.8B
| $65.1M | 0.19% |
2,798
+491
| +21% | +$114K |
|
70
PUT
Merck
MRK
$318B
| $64.2M | 0.18% |
7,987
+1,945
| +32% | +$156K |
|
71
CALL
IBM
IBM
$198B
| $62.3M | 0.18% |
4,478
+1,712
| +62% | +$231K |
|
|
XYZ
72
PUT
Block Inc
XYZ
$46.5B
| $60.4M | 0.17% |
9,752
+3,519
| +56% | +$239K |
|
73
PUT
Salesforce
CRM
$135B
| $60M | 0.17% |
4,045
-3,514
| -46% | -$534K |
|
74
CALL
Walmart Inc
WMT
$871B
| $60M | 0.17% |
15,177
+4,476
| +42% | +$169K |
|
75
CALL
CVS Health
CVS
$141B
| $60M | 0.17% |
9,517
+3,590
| +61% | +$213K |
|
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.