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 |
Broadcom
AVGO
|
+$33.7M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.8M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.3M |
| 4 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$11.9M |
| 5 |
Citigroup
C
|
+$8.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$34.2M |
| 2 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$17.9M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$14.7M |
| 4 |
Walt Disney
DIS
|
+$13.3M |
| 5 |
Booking.com
BKNG
|
+$12.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 7.64% |
| 2 | Communication Services | 6.85% |
| 3 | Consumer Discretionary | 4.92% |
| 4 | Healthcare | 4.57% |
| 5 | Financials | 4.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
26
iShares Biotechnology ETF
IBB
$9.37B
| $6.75M | 0.54% |
+77,607
| New | +$6.94M |
|
27
Alphabet (Google) Class A
GOOGL
$4.24T
| $6.62M | 0.53% |
173,560
+31,560
| +22% | +$1.16M |
|
28
Bausch Health
BHC
$1.69B
| $6.6M | 0.53% |
250,955
+52,156
| +26% | +$3.86M |
|
|
MJN
29
DELISTED
Mead Johnson Nutrition Company
MJN
| $6.16M | 0.49% |
72,469
+34,428
| +91% | +$2.56M |
|
30
CALL
Netflix
NFLX
$286B
| $5.74M | 0.46% |
60,900
-58,940
| -49% | -$579K |
|
|
TWTR
31
DELISTED
Twitter, Inc.
TWTR
| $5.57M | 0.44% |
336,305
+32,682
| +11% | +$573K |
|
32
PUT
Tesla
TSLA
$1.42T
| $5.52M | 0.44% |
117,600
+33,780
| +40% | +$444K |
|
|
33
CALL
SPDR Gold Trust
GLD
$132B
| $5.21M | 0.42% |
16,717
+12,364
| +284% | +$1.4M |
|
34
Amgen
AMGN
$198B
| $5.14M | 0.41% |
+34,305
| New | +$5.1M |
|
35
Herbalife
HLF
$1.25B
| $5.1M | 0.41% |
165,582
+110,598
| +201% | +$2.85M |
|
|
36
CALL
Booking.com
BKNG
$139B
| $5.07M | 0.4% |
22,875
+2,300
| +11% | +$110K |
|
|
37
PUT
Apple
AAPL
$4.81T
| $4.96M | 0.4% |
44,372
-32,044
| -42% | -$798K |
|
|
ADT
38
DELISTED
ADT Corp
ADT
| $4.74M | 0.38% |
114,788
+108,644
| +1,768% | +$3.81M |
|
39
Intuitive Surgical
ISRG
$124B
| $4.67M | 0.37% |
+69,975
| New | +$4.34M |
|
40
PUT
Regeneron Pharmaceuticals
REGN
$70.8B
| $4.67M | 0.37% |
233
-181
| -44% | -$74.6K |
|
41
Wynn Resorts
WYNN
$9.82B
| $4.63M | 0.37% |
49,603
-45,827
| -48% | -$3.38M |
|
42
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$16.4B
| $4.51M | 0.36% |
55,243
+6,135
| +12% | +$487K |
|
43
ProShares Ultra VIX Short-Term Futures ETF
UVXY
$233M
| – | – |
0
| – | – |
|
|
LNKD
44
PUT
DELISTED
LinkedIn Corporation
LNKD
| $4.2M | 0.33% |
1,802
+251
| +16% | +$36.9K |
|
|
45
Netflix
NFLX
$286B
| $4M | 0.32% |
391,650
+262,980
| +204% | +$2.58M |
|
46
CALL
State Street Materials Select Sector SPDR ETF
XLB
$8.31B
| $3.96M | 0.32% |
32,056
+13,128
| +69% | +$272K |
|
|
TWTR
47
PUT
DELISTED
Twitter, Inc.
TWTR
| $3.89M | 0.31% |
6,017
+153
| +3% | +$2.68K |
|
48
iShares 20+ Year Treasury Bond ETF
TLT
$42.3B
| $3.82M | 0.3% |
+29,253
| New | +$3.75M |
|
49
CALL
Baidu
BIDU
$36.8B
| $3.72M | 0.3% |
2,439
-695
| -22% | -$118K |
|
50
PUT
Meta Platforms (Facebook)
META
$1.63T
| $3.72M | 0.3% |
13,648
+6,965
| +104% | +$735K |
|
Similar funds
Simplex Trading's Q1 2016 Portfolio in Review
As of Q1 2016, Simplex Trading held 7,084 positions worth $1.25B, down 1.8% from $1.28B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading's Q1 2016 filing shows 1,678 new, 2,214 increased, 1,528 reduced and 1,505 closed positions. Its largest new stake was Broadcom: 2,493,400 shares worth $38.5M. The largest sale was Apple, an estimated $34.2M.
By sector, the portfolio is most concentrated in Technology at 7.6% of assets, up from 7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q1 2016 buy was Broadcom: 2,493,400 shares worth $38.5M.
- Simplex Trading added most to Citigroup in Q1 2016, an estimated $8.7M increase.
- Simplex Trading's biggest Q1 2016 reduction was Booking.com, cutting an estimated $12.1M.
- Simplex Trading fully exited Apple in Q1 2016, selling an estimated $34.2M.
- Simplex Trading's ten largest holdings make up 17% of its $1.25B portfolio in Q1 2016.
- Simplex Trading opened 1,678 new positions and closed 1,505 in Q1 2016.
- Simplex Trading's portfolio value fell 1.8% quarter-over-quarter to $1.25B.
Based on Simplex Trading's 13F filing for Q1 2016, filed 14 Apr 2016.