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 | |
|---|---|---|---|---|---|---|
26
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $209M | 0.59% |
7,752
-3,905
| -33% | -$1.04M |
|
|
27
PUT
Alibaba
BABA
$283B
| $198M | 0.56% |
11,855
-3,644
| -24% | -$626K |
|
28
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $196M | 0.56% |
46,260
+3,172
| +7% | +$172K |
|
29
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $187M | 0.53% |
39,165
+2,157
| +6% | +$60.3K |
|
|
30
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $175M | 0.5% |
51,486
+198
| +0.4% | +$5.54K |
|
31
PUT
Booking.com
BKNG
$139B
| $173M | 0.49% |
22,000
+6,100
| +38% | +$472K |
|
32
PUT
Meta Platforms (Facebook)
META
$1.63T
| $166M | 0.47% |
9,301
-6,776
| -42% | -$1.29M |
|
|
33
CALL
Boeing
BA
$161B
| $165M | 0.47% |
4,343
-2,371
| -35% | -$848K |
|
34
PUT
Microsoft
MSFT
$2.95T
| $154M | 0.44% |
11,089
-1,156
| -9% | -$159K |
|
35
PUT
Visa
V
$677B
| $149M | 0.42% |
8,651
+5,236
| +153% | +$933K |
|
36
CALL
NVIDIA
NVDA
$5.02T
| $132M | 0.37% |
302,840
+19,320
| +7% | +$81.3K |
|
|
37
CALL
Microsoft
MSFT
$2.95T
| $124M | 0.35% |
8,911
-2,190
| -20% | -$301K |
|
|
38
PUT
NVIDIA
NVDA
$5.02T
| $123M | 0.35% |
283,680
-7,920
| -3% | -$33.3K |
|
39
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $121M | 0.34% |
33,092
+9,850
| +42% | +$727K |
|
40
PUT
Home Depot
HD
$331B
| $117M | 0.33% |
5,046
+1,745
| +53% | +$381K |
|
41
CALL
Walt Disney
DIS
$167B
| $114M | 0.32% |
8,747
-8,987
| -51% | -$1.24M |
|
42
PUT
Adobe
ADBE
$90.3B
| $113M | 0.32% |
4,079
+754
| +23% | +$220K |
|
43
PUT
Shopify
SHOP
$160B
| $108M | 0.31% |
34,630
+6,260
| +22% | +$214K |
|
|
44
CALL
Visa
V
$677B
| $104M | 0.3% |
6,062
+1,967
| +48% | +$350K |
|
|
45
CALL
Home Depot
HD
$331B
| $94.1M | 0.27% |
4,054
+1,674
| +70% | +$366K |
|
46
PUT
Berkshire Hathaway Class B
BRK.B
$1.06T
| $92.8M | 0.26% |
4,463
-889
| -17% | -$183K |
|
|
47
CALL
Booking.com
BKNG
$139B
| $92.8M | 0.26% |
11,825
-2,475
| -17% | -$192K |
|
48
CALL
iShares MSCI Australia ETF
EWA
$1.34B
| $90.5M | 0.26% |
22,162
-1,847
| -8% | -$40.8K |
|
49
PUT
Costco
COST
$412B
| $88.9M | 0.25% |
3,084
+907
| +42% | +$255K |
|
50
PUT
PayPal
PYPL
$49.3B
| $88.5M | 0.25% |
8,547
+3,674
| +75% | +$405K |
|
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.