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 | |
|---|---|---|---|---|---|---|
126
HP
HPQ
$22.7B
| $2.04M | 0.15% |
175,149
+156,905
| +860% | +$2.04M |
|
127
Autodesk
ADSK
$44.6B
| $2.03M | 0.15% |
+46,096
| New | +$2.31M |
|
128
PUT
Bank of America
BAC
$430B
| $1.99M | 0.15% |
3,700
+396
| +12% | +$6.66K |
|
129
Merck
MRK
$312B
| $1.99M | 0.15% |
+42,126
| New | +$2.24M |
|
|
QIHU
130
DELISTED
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
| $1.97M | 0.14% |
41,213
-36,563
| -47% | -$2.06M |
|
|
SCTY
131
PUT
DELISTED
SolarCity Corporation
SCTY
| $1.93M | 0.14% |
2,668
+612
| +30% | +$30.7K |
|
132
PUT
Transocean
RIG
$5.8B
| $1.87M | 0.14% |
3,111
+281
| +10% | +$3.9K |
|
|
TRAK
133
DELISTED
DEALERTRACK TECHNOLOGIES, INC. COM STK
TRAK
| $1.86M | 0.14% |
+29,426
| New | +$1.84M |
|
|
TWTR
134
DELISTED
Twitter, Inc.
TWTR
| $1.84M | 0.14% |
68,503
-190,555
| -74% | -$5.72M |
|
135
CALL
Nike
NKE
$63.7B
| $1.84M | 0.14% |
3,616
+1,846
| +104% | +$104K |
|
136
PUT
Boeing
BA
$161B
| $1.84M | 0.13% |
4,893
+3,490
| +249% | +$484K |
|
137
McKesson
MCK
$97.3B
| $1.83M | 0.13% |
+9,911
| New | +$2.1M |
|
|
LNKD
138
PUT
DELISTED
LinkedIn Corporation
LNKD
| $1.83M | 0.13% |
1,608
+338
| +27% | +$67.1K |
|
139
Blackstone
BX
$152B
| $1.82M | 0.13% |
58,682
+29,188
| +99% | +$1.06M |
|
|
ISSI
140
DELISTED
INTEGRATED SILICON SOLUTN INC
ISSI
| $1.81M | 0.13% |
84,470
+38,283
| +83% | +$838K |
|
141
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $1.8M | 0.13% |
10,934
+7,290
| +200% | +$105K |
|
142
DuPont de Nemours
DD
$18.3B
| $1.77M | 0.13% |
+16,516
| New | +$1.91M |
|
143
Kroger
KR
$35.4B
| $1.76M | 0.13% |
48,824
+35,240
| +259% | +$1.31M |
|
144
GoPro
GPRO
$125M
| $1.73M | 0.13% |
55,523
-7,506
| -12% | -$369K |
|
|
MNK
145
PUT
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $1.72M | 0.13% |
765
+195
| +34% | +$19.3K |
|
146
PUT
Regeneron Pharmaceuticals
REGN
$70.5B
| $1.69M | 0.12% |
410
+119
| +41% | +$63.9K |
|
147
PUT
Johnson & Johnson
JNJ
$603B
| $1.66M | 0.12% |
3,369
+2,090
| +163% | +$202K |
|
|
TYNS
148
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $1.64M | 0.12% |
4,594
+282
| +7% | +$8.51K |
|
|
149
CALL
Gilead Sciences
GILD
$165B
| $1.63M | 0.12% |
6,474
+1,745
| +37% | +$194K |
|
150
CALL
Alibaba
BABA
$283B
| $1.62M | 0.12% |
13,314
+6,569
| +97% | +$478K |
|
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.