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 |
Gilead Sciences
GILD
|
+$17.3M |
| 2 |
Apple
AAPL
|
+$15.2M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$14.9M |
| 4 |
Booking.com
BKNG
|
+$14.7M |
| 5 |
Wells Fargo
WFC
|
+$12.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
SPDR Gold Trust
GLD
|
+$38.3M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
+$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
+$12.6M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
+$10.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.39% |
| 2 | Healthcare | 8.28% |
| 3 | Consumer Discretionary | 6.84% |
| 4 | Technology | 6.06% |
| 5 | Financials | 4.39% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1
CALL
Amazon
AMZN
$2.66T
| $67.7M | 4.59% |
102,120
+7,540
| +8% | +$289K |
|
2
Meta Platforms (Facebook)
META
$1.63T
| $36.9M | 2.5% |
287,418
+61,492
| +27% | +$7.63M |
|
|
3
CALL
Meta Platforms (Facebook)
META
$1.63T
| $27.2M | 1.84% |
17,128
-548
| -3% | -$68K |
|
4
CALL
State Street SPDR S&P 500 ETF Trust
SPY
$787B
| $21.1M | 1.43% |
18,984
-27,238
| -59% | -$5.89M |
|
|
5
Gilead Sciences
GILD
$162B
| $20.3M | 1.37% |
256,305
+212,451
| +484% | +$17.3M |
|
|
6
Alphabet (Google) Class A
GOOGL
$4.24T
| $20.1M | 1.36% |
500,440
+381,380
| +320% | +$14.9M |
|
|
7
Apple
AAPL
$4.81T
| $19M | 1.29% |
673,648
+573,208
| +571% | +$15.2M |
|
|
8
PUT
State Street SPDR S&P 500 ETF Trust
SPY
$787B
| $17.8M | 1.2% |
45,629
-9,489
| -17% | -$2.05M |
|
|
LNKD
9
DELISTED
LinkedIn Corporation
LNKD
| $17.4M | 1.18% |
91,241
-79,556
| -47% | -$15.2M |
|
|
10
Booking.com
BKNG
$139B
| $15.6M | 1.05% |
+264,225
| New | +$14.7M |
|
11
Biogen
BIIB
$30B
| $13.7M | 0.93% |
43,761
-12,706
| -23% | -$3.76M |
|
12
CALL
Alibaba
BABA
$283B
| $13.3M | 0.9% |
13,149
+4,120
| +46% | +$382K |
|
13
Wynn Resorts
WYNN
$9.82B
| $12.4M | 0.84% |
126,843
+108,404
| +588% | +$10.6M |
|
|
14
Wells Fargo
WFC
$266B
| $11.9M | 0.81% |
+269,446
| New | +$12.9M |
|
15
CALL
iShares S&P 100 ETF
OEF
$20.2B
| $11.2M | 0.76% |
36,336
-31,143
| -46% | -$2.99M |
|
|
16
Alphabet (Google) Class C
GOOG
$4.22T
| $10.3M | 0.7% |
+264,800
| New | +$10.1M |
|
|
17
CALL
Alphabet (Google) Class A
GOOGL
$4.24T
| $9.88M | 0.67% |
104,380
-11,020
| -10% | -$431K |
|
18
PUT
Tesla
TSLA
$1.42T
| $9.29M | 0.63% |
92,400
+10,185
| +12% | +$147K |
|
|
19
CALL
Booking.com
BKNG
$139B
| $8.99M | 0.61% |
21,600
-9,125
| -30% | -$509K |
|
|
MDVN
20
DELISTED
MEDIVATION, INC.
MDVN
| $8.62M | 0.58% |
105,918
+97,056
| +1,095% | +$6.87M |
|
|
21
PUT
iShares S&P 100 ETF
OEF
$20.2B
| $8.36M | 0.57% |
65,665
-17,414
| -21% | -$1.67M |
|
22
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$16.4B
| $8.15M | 0.55% |
+93,358
| New | +$8.03M |
|
|
UCD
23
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $7.77M | 0.53% |
15,881
+201
| +1% | +$6.57K |
|
|
24
CALL
Apple
AAPL
$4.81T
| $7.15M | 0.48% |
70,964
-1,676
| -2% | -$44.4K |
|
25
Walt Disney
DIS
$167B
| $7.12M | 0.48% |
+76,647
| New | +$7.34M |
|
Similar funds
Simplex Trading's Q3 2016 Portfolio in Review
As of Q3 2016, Simplex Trading held 7,235 positions worth $1.48B, down 1.4% from $1.5B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $87.1M in Q3 2016, closing 1,479 positions and reducing 1,939 holdings. Its most notable exit was SPDR Gold Trust, an estimated $38.3M position sold in full.
By sector, the portfolio is most concentrated in Communication Services at 8.4% of assets, up from 6.6% a quarter earlier, followed by Healthcare and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Booking.com worth $15.6M.
- Simplex Trading's largest Q3 2016 buy was Booking.com: 264,225 shares worth $15.6M.
- Simplex Trading added most to Gilead Sciences in Q3 2016, an estimated $17.3M increase.
- Simplex Trading's biggest Q3 2016 reduction was LinkedIn Corporation, cutting an estimated $15.2M.
- Simplex Trading fully exited SPDR Gold Trust in Q3 2016, selling an estimated $38.3M.
- Simplex Trading's ten largest holdings make up 18% of its $1.48B portfolio in Q3 2016.
- Simplex Trading opened 1,460 new positions and closed 1,479 in Q3 2016.
- Simplex Trading's portfolio value fell 1.4% quarter-over-quarter to $1.48B.
Based on Simplex Trading's 13F filing for Q3 2016, filed 7 Oct 2016.