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 |
Apple
AAPL
|
+$34.8M |
| 2 |
Bausch Health
BHC
|
+$20.3M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$18.9M |
| 4 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$12.3M |
| 5 |
Amazon
AMZN
|
+$12.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.8M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$12.1M |
| 4 |
Netflix
NFLX
|
+$10.7M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 9.5% |
| 2 | Healthcare | 7.55% |
| 3 | Technology | 7.01% |
| 4 | Communication Services | 6.66% |
| 5 | Industrials | 5.76% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
CALL
Amazon
AMZN
$2.66T
| $42.7M | 3.34% |
82,380
-16,620
| -17% | -$524K |
|
2
CALL
Alphabet (Google) Class A
GOOGL
$4.24T
| $36.8M | 2.88% |
+91,380
| New | +$3.38M |
|
|
3
Apple
AAPL
$4.81T
| $36.1M | 2.83% |
1,373,688
+1,218,084
| +783% | +$34.8M |
|
4
Booking.com
BKNG
$139B
| $20.6M | 1.61% |
404,225
+196,075
| +94% | +$10.4M |
|
|
5
Bausch Health
BHC
$1.69B
| $20.2M | 1.58% |
198,799
+180,631
| +994% | +$20.3M |
|
6
CALL
Meta Platforms (Facebook)
META
$1.63T
| $18.2M | 1.43% |
11,898
-11,429
| -49% | -$1.17M |
|
|
GMCR
7
DELISTED
KEURIG GREEN MTN INC
GMCR
| $17.9M | 1.4% |
+198,479
| New | +$12.3M |
|
|
8
CALL
Netflix
NFLX
$286B
| $16M | 1.25% |
119,840
-18,120
| -13% | -$207K |
|
|
9
Chipotle Mexican Grill
CMG
$42.7B
| $14.9M | 1.16% |
+1,548,150
| New | +$18.9M |
|
10
Walt Disney
DIS
$167B
| $14.5M | 1.14% |
138,261
+2,188
| +2% | +$244K |
|
|
11
Alphabet (Google) Class C
GOOG
$4.22T
| $13.4M | 1.05% |
353,640
-158,020
| -31% | -$5.67M |
|
12
Alibaba
BABA
$283B
| $13.3M | 1.04% |
163,219
+50,593
| +45% | +$3.97M |
|
|
13
Amazon
AMZN
$2.66T
| $13M | 1.02% |
+385,500
| New | +$12.2M |
|
14
CALL
Tesla
TSLA
$1.42T
| $11.9M | 0.94% |
53,580
-48,045
| -47% | -$719K |
|
15
PUT
iShares S&P 100 ETF
OEF
$20.2B
| $11.8M | 0.93% |
37,553
-31,069
| -45% | -$2.85M |
|
|
16
PUT
Apple
AAPL
$4.81T
| $10.5M | 0.83% |
76,416
-11,512
| -13% | -$329K |
|
17
PUT
State Street SPDR S&P 500 ETF Trust
SPY
$787B
| $9.55M | 0.75% |
21,157
-16,681
| -44% | -$3.43M |
|
18
Gilead Sciences
GILD
$162B
| $9.19M | 0.72% |
90,841
-15,221
| -14% | -$1.58M |
|
19
American Airlines Group
AAL
$10.1B
| $8.8M | 0.69% |
207,873
+200,706
| +2,800% | +$8.7M |
|
20
NXP Semiconductors
NXPI
$69B
| $8.78M | 0.69% |
104,172
+29,523
| +40% | +$2.53M |
|
|
21
PUT
Bausch Health
BHC
$1.69B
| $8.54M | 0.67% |
5,621
+2,990
| +114% | +$336K |
|
|
22
Meta Platforms (Facebook)
META
$1.63T
| $8.15M | 0.64% |
77,873
+75,873
| +3,794% | +$7.79M |
|
23
Viatris
VTRS
$20.5B
| $8M | 0.63% |
147,919
+96,692
| +189% | +$4.65M |
|
|
JAH
24
DELISTED
JARDEN CORPORATION
JAH
| $7.51M | 0.59% |
+131,438
| New | +$6.59M |
|
|
25
CALL
State Street SPDR S&P 500 ETF Trust
SPY
$787B
| $7.44M | 0.58% |
10,384
-7,705
| -43% | -$1.58M |
|
Similar funds
Simplex Trading's Q4 2015 Portfolio in Review
As of Q4 2015, Simplex Trading held 7,008 positions worth $1.28B, down 6.4% from $1.36B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading's Q4 2015 filing shows 1,417 new, 1,993 increased, 1,803 reduced and 1,598 closed positions. Its largest new stake was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M. The largest sale was iShares Russell 2000 ETF, an estimated $27.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 9.5% of assets, up from 4.6% a quarter earlier, followed by Healthcare and Technology.
- Simplex Trading's largest Q4 2015 buy was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.
- Simplex Trading added most to Apple in Q4 2015, an estimated $34.8M increase.
- Simplex Trading's biggest Q4 2015 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $13.8M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q4 2015, selling an estimated $27.5M.
- Simplex Trading's ten largest holdings make up 19% of its $1.28B portfolio in Q4 2015.
- Simplex Trading opened 1,417 new positions and closed 1,598 in Q4 2015.
- Simplex Trading's portfolio value fell 6.4% quarter-over-quarter to $1.28B.
Based on Simplex Trading's 13F filing for Q4 2015, filed 20 Jan 2016.