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 | |
|---|---|---|---|---|---|---|
101
United States Oil Fund
USO
$2.31B
| $2.46M | 0.18% |
+20,969
| New | +$2.58M |
|
102
F5
FFIV
$23.2B
| $2.4M | 0.18% |
20,693
+17,778
| +610% | +$2.18M |
|
|
CELG
103
CALL
DELISTED
Celgene Corp
CELG
| $2.39M | 0.18% |
4,007
+1,041
| +35% | +$129K |
|
104
PUT
Las Vegas Sands
LVS
$30.4B
| $2.35M | 0.17% |
2,051
+1,463
| +249% | +$73.8K |
|
105
CALL
Invesco QQQ Trust
QQQ
$471B
| $2.31M | 0.17% |
10,752
+8,012
| +292% | +$861K |
|
|
CBI
106
PUT
DELISTED
Chicago Bridge & Iron Nv
CBI
| $2.3M | 0.17% |
940
-919
| -49% | -$42.5K |
|
|
HOT
107
DELISTED
STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
HOT
| $2.27M | 0.17% |
34,144
+18,883
| +124% | +$1.44M |
|
|
YHOO
108
PUT
DELISTED
Yahoo Inc
YHOO
| $2.27M | 0.17% |
3,430
+2,017
| +143% | +$70K |
|
109
PUT
Micron Technology
MU
$1.1T
| $2.25M | 0.17% |
4,341
-1,972
| -31% | -$33.9K |
|
110
Zoetis
ZTS
$31.6B
| $2.24M | 0.16% |
54,312
+26,509
| +95% | +$1.23M |
|
|
GMCR
111
PUT
DELISTED
KEURIG GREEN MTN INC
GMCR
| $2.23M | 0.16% |
1,095
+357
| +48% | +$22K |
|
112
BP
BP
$110B
| $2.21M | 0.16% |
85,963
+22,906
| +36% | +$671K |
|
|
MNK
113
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $2.19M | 0.16% |
34,323
+23,306
| +212% | +$2.31M |
|
114
Visa
V
$677B
| $2.19M | 0.16% |
31,371
+569
| +2% | +$40.6K |
|
|
115
PUT
IBM
IBM
$198B
| $2.18M | 0.16% |
2,077
-988
| -32% | -$146K |
|
116
Wynn Resorts
WYNN
$9.93B
| $2.15M | 0.16% |
40,491
-53,969
| -57% | -$4.69M |
|
117
Skyworks Solutions
SWKS
$8.99B
| $2.14M | 0.16% |
25,436
+18,751
| +280% | +$1.72M |
|
118
CALL
Salesforce
CRM
$139B
| $2.13M | 0.16% |
2,286
+1,325
| +138% | +$93.9K |
|
|
PNRA
119
DELISTED
Panera Bread Co
PNRA
| $2.13M | 0.16% |
11,009
+8,788
| +396% | +$1.64M |
|
120
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$291M
| $2.12M | 0.16% |
+48,950
| New | +$2.24M |
|
|
MNDT
121
PUT
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $2.12M | 0.16% |
2,104
+489
| +30% | +$20.4K |
|
122
PUT
Amgen
AMGN
$198B
| $2.1M | 0.15% |
1,706
+621
| +57% | +$97.9K |
|
123
SPDR Gold Trust
GLD
$132B
| $2.08M | 0.15% |
+19,434
| New | +$2.09M |
|
|
MNDT
124
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $2.08M | 0.15% |
65,230
+4,505
| +7% | +$188K |
|
125
Viatris
VTRS
$20.5B
| $2.06M | 0.15% |
51,227
-15,515
| -23% | -$865K |
|
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.