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 |
iShares Russell 2000 ETF
IWM
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
26
PUT
Alphabet (Google) Class C
GOOG
$4.22T
| $7.93M | 0.58% |
108,320
+8,480
| +8% | +$261K |
|
27
PUT
GoPro
GPRO
$125M
| $7.84M | 0.57% |
6,385
+2,435
| +62% | +$120K |
|
28
Yum! Brands
YUM
$40.6B
| $7.45M | 0.55% |
129,545
+107,768
| +495% | +$6.52M |
|
29
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.31B
| $7.43M | 0.54% |
46,878
+40,098
| +591% | +$892K |
|
|
UCD
30
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $7.32M | 0.54% |
10,183
+4,498
| +79% | +$174K |
|
|
UCD
31
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $7.26M | 0.53% |
13,096
+7,969
| +155% | +$308K |
|
32
PUT
Amazon
AMZN
$2.66T
| $7.1M | 0.52% |
150,320
+68,400
| +83% | +$1.73M |
|
33
CALL
iShares S&P 100 ETF
OEF
$20.2B
| $6.71M | 0.49% |
43,469
+29,606
| +214% | +$2.66M |
|
34
Alibaba
BABA
$283B
| $6.64M | 0.49% |
112,626
-2,005
| -2% | -$146K |
|
35
NXP Semiconductors
NXPI
$69B
| $6.5M | 0.48% |
74,649
+47,781
| +178% | +$4.31M |
|
36
PUT
Netflix
NFLX
$286B
| $6.35M | 0.47% |
183,990
-212,070
| -54% | -$2.28M |
|
37
PUT
Biogen
BIIB
$30B
| $6.14M | 0.45% |
2,508
+1,289
| +106% | +$426K |
|
38
RTX Corp
RTX
$261B
| $6.12M | 0.45% |
109,255
+95,923
| +719% | +$5.91M |
|
39
Amgen
AMGN
$198B
| $6.07M | 0.45% |
43,906
+20,830
| +90% | +$3.28M |
|
40
PUT
Wynn Resorts
WYNN
$9.82B
| $6.05M | 0.44% |
1,529
+261
| +21% | +$22.7K |
|
|
41
PUT
Gilead Sciences
GILD
$162B
| $6M | 0.44% |
7,579
+3,205
| +73% | +$356K |
|
42
Berkshire Hathaway Class B
BRK.B
$1.06T
| $5.98M | 0.44% |
45,833
-65,599
| -59% | -$8.99M |
|
43
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $5.9M | 0.43% |
9,996
-818
| -8% | -$41.9K |
|
|
44
PUT
Baidu
BIDU
$36.8B
| $5.75M | 0.42% |
3,261
+187
| +6% | +$30.8K |
|
45
PUT
Bausch Health
BHC
$1.69B
| $5.72M | 0.42% |
2,631
+1,220
| +86% | +$284K |
|
46
Chevron
CVX
$381B
| $5.67M | 0.42% |
71,847
+54,765
| +321% | +$4.61M |
|
47
CALL
Booking.com
BKNG
$139B
| $5.63M | 0.41% |
35,075
-6,775
| -16% | -$337K |
|
48
JPMorgan Chase
JPM
$918B
| $5.62M | 0.41% |
+92,192
| New | +$6.04M |
|
|
CELG
49
DELISTED
Celgene Corp
CELG
| $5.59M | 0.41% |
51,649
-34,770
| -40% | -$4.31M |
|
50
PUT
Tesla
TSLA
$1.42T
| $5.47M | 0.4% |
97,845
+40,350
| +70% | +$686K |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.