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 | |
|---|---|---|---|---|---|---|
|
LITB
1701
PUT
LightInTheBox
LITB
$59M
| $71K | 0.01% |
+55
| New | +$1.15K |
|
|
MOMO
1702
Hello Group
MOMO
$869M
| $71K | 0.01% |
5,734
-18,591
| -76% | -$260K |
|
1703
CALL
OFG Bancorp
OFG
$2.21B
| $71K | 0.01% |
+915
| New | +$7.88K |
|
1704
Rogers Communications
RCI
$17.7B
| $71K | 0.01% |
+2,075
| New | +$71.4K |
|
1705
PUT
RH
RH
$3.3B
| $71K | 0.01% |
111
+14
| +14% | +$1.38K |
|
1706
RLI Corp
RLI
$5.68B
| $71K | 0.01% |
+2,660
| New | +$72.1K |
|
1707
CALL
Texas Instruments
TXN
$255B
| $71K | 0.01% |
438
+398
| +995% | +$19.4K |
|
|
GWPH
1708
CALL
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $71K | 0.01% |
69
-34
| -33% | -$3.78K |
|
|
ATHN
1709
CALL
DELISTED
Athenahealth, Inc.
ATHN
| $71K | 0.01% |
111
+3
| +3% | +$391 |
|
|
CAB
1710
PUT
DELISTED
Cabela's Inc
CAB
| $71K | 0.01% |
251
+245
| +4,083% | +$11.4K |
|
1711
Barnes & Noble Education
BNED
$412M
| $70K | 0.01% |
+55
| New | +$71.2K |
|
1712
PUT
Dollar Tree
DLTR
$23.1B
| $70K | 0.01% |
426
+417
| +4,633% | +$31.3K |
|
1713
PUT
Edwards Lifesciences
EW
$47.6B
| $70K | 0.01% |
528
+180
| +52% | +$4.34K |
|
1714
PUT
Fastenal
FAST
$54B
| $70K | 0.01% |
400
+308
| +335% | +$3.05K |
|
1715
ING
ING
$93.8B
| $70K | 0.01% |
+5,012
| New | +$79K |
|
1716
CALL
Merck
MRK
$324B
| $70K | 0.01% |
955
+430
| +82% | +$22.8K |
|
1717
CALL
M&T Bank
MTB
$36.2B
| $70K | 0.01% |
259
+193
| +292% | +$24.1K |
|
1718
PUT
Newmont
NEM
$98.2B
| $70K | 0.01% |
183
-56
| -23% | -$1K |
|
1719
PUT
National Fuel Gas
NFG
$7.84B
| $70K | 0.01% |
+215
| New | +$11.6K |
|
|
ACH
1720
Accendra Health
ACH
$240M
| $70K | 0.01% |
2,220
+951
| +75% | +$32.4K |
|
1721
PUT
PACCAR
PCAR
$69.6B
| $70K | 0.01% |
164
+159
| +3,180% | +$6.44K |
|
1722
VanEck Pharmaceutical ETF
PPH
$945M
| $70K | 0.01% |
+1,120
| New | +$78.7K |
|
1723
PUT
Raymond James Financial
RJF
$32.5B
| $70K | 0.01% |
177
+169
| +2,113% | +$6.26K |
|
1724
Rambus
RMBS
$10.4B
| $70K | 0.01% |
+5,988
| New | +$77.8K |
|
|
SOHU
1725
PUT
Sohu.com
SOHU
$336M
| $70K | 0.01% |
61
+2
| +3% | +$93 |
|
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.