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 | |
|---|---|---|---|---|---|---|
51
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.6B
| $5.4M | 0.4% |
39,430
+9,870
| +33% | +$33K |
|
52
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$16.4B
| $5.33M | 0.39% |
64,004
+63,190
| +7,763% | +$5.48M |
|
53
Goldman Sachs
GS
$311B
| $5.23M | 0.38% |
30,107
-24,312
| -45% | -$4.77M |
|
54
American International
AIG
$42.5B
| $5.07M | 0.37% |
89,193
+42,874
| +93% | +$2.62M |
|
|
55
PUT
Meta Platforms (Facebook)
META
$1.63T
| $5M | 0.37% |
11,181
+6,720
| +151% | +$617K |
|
56
Williams Companies
WMB
$90.7B
| $4.99M | 0.37% |
135,538
-36,631
| -21% | -$1.82M |
|
|
SIAL
57
DELISTED
SIGMA - ALDRICH CORP
SIAL
| $4.81M | 0.35% |
34,601
+14,221
| +70% | +$1.98M |
|
58
Biogen
BIIB
$29.5B
| $4.74M | 0.35% |
16,253
-12,703
| -44% | -$4.19M |
|
|
VXX
59
CALL
DELISTED
iPath S&P 500 VIX Short-Term Futures ETN due 1/30/2019
VXX
| $4.74M | 0.35% |
1,127
+793
| +237% | +$264K |
|
60
HCA Healthcare
HCA
$82.2B
| $4.66M | 0.34% |
60,292
-21,334
| -26% | -$1.89M |
|
|
61
Apple
AAPL
$4.81T
| $4.29M | 0.31% |
155,604
-766,148
| -83% | -$22.5M |
|
|
APC
62
DELISTED
Anadarko Petroleum
APC
| $4.28M | 0.31% |
70,823
+48,638
| +219% | +$3.46M |
|
63
PUT
Booking.com
BKNG
$139B
| $4.24M | 0.31% |
45,450
+10,700
| +31% | +$532K |
|
64
PUT
Viatris
VTRS
$20.5B
| $4.17M | 0.31% |
3,473
+942
| +37% | +$52.5K |
|
65
CALL
Chipotle Mexican Grill
CMG
$42.5B
| $4.16M | 0.3% |
50,000
+16,200
| +48% | +$230K |
|
66
PUT
Caterpillar
CAT
$410B
| $4.1M | 0.3% |
4,757
+3,993
| +523% | +$305K |
|
67
Starbucks
SBUX
$119B
| $3.92M | 0.29% |
68,899
+62,615
| +996% | +$3.51M |
|
|
PCP
68
DELISTED
PRECISION CASTPARTS CORP
PCP
| $3.6M | 0.26% |
15,676
+11,816
| +306% | +$2.54M |
|
69
American Express
AXP
$240B
| $3.59M | 0.26% |
48,425
-10,078
| -17% | -$775K |
|
|
70
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $3.57M | 0.26% |
7,179
+5,188
| +261% | +$885K |
|
71
Palo Alto Networks
PANW
$279B
| $3.46M | 0.25% |
120,582
+70,848
| +142% | +$2.09M |
|
72
PUT
SPDR Gold Trust
GLD
$132B
| $3.34M | 0.24% |
4,268
+3,346
| +363% | +$361K |
|
73
Bausch Health
BHC
$1.75B
| $3.24M | 0.24% |
18,168
+9,317
| +105% | +$2.17M |
|
|
SUNE
74
PUT
DELISTED
SUNEDISON, INC COM
SUNE
| $3.21M | 0.24% |
4,679
+3,882
| +487% | +$69.6K |
|
75
State Street SPDR S&P 500 ETF Trust
SPY
$787B
| $3.11M | 0.23% |
+16,235
| New | +$3.29M |
|
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.