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 | Miscellaneous | 65.37% |
| 2 | Healthcare | 6.71% |
| 3 | Communication Services | 4.77% |
| 4 | Technology | 4.7% |
| 5 | Consumer Discretionary | 4.67% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
876
Direxion Daily 20+ Year Treasury Bear 3X ETF
TMV
$201M
| $211K | 0.02% |
3,084
-2,076
| -40% | -$156K |
|
|
TGH
877
PUT
DELISTED
Textainer Group Holdings limited
TGH
| $211K | 0.02% |
199
+160
| +410% | +$3.17K |
|
878
CarMax
KMX
$8.98B
| $210K | 0.02% |
3,556
+985
| +38% | +$61.7K |
|
879
Madison Square Garden
MSGS
$9.42B
| $210K | 0.02% |
4,099
+4,004
| +4,215% | +$220K |
|
|
BEAV
880
PUT
DELISTED
B/E Aerospace Inc
BEAV
| $210K | 0.02% |
442
+344
| +351% | +$17.2K |
|
881
Herbalife
HLF
$1.3B
| $209K | 0.02% |
+7,698
| New | +$211K |
|
882
iShares MSCI India ETF
INDA
$6.77B
| $209K | 0.02% |
+7,322
| New | +$215K |
|
883
Live Nation Entertainment
LYV
$40.4B
| $209K | 0.02% |
+8,727
| New | +$224K |
|
|
SAVE
884
DELISTED
Spirit Airlines, Inc.
SAVE
| $209K | 0.02% |
4,426
+2,105
| +91% | +$118K |
|
|
EXPR
885
DELISTED
Express, Inc.
EXPR
| $209K | 0.02% |
586
+208
| +55% | +$78.2K |
|
886
Alaska Air
ALK
$4.69B
| $208K | 0.02% |
2,620
-6,022
| -70% | -$460K |
|
887
PUT
JD.com
JD
$38.2B
| $208K | 0.02% |
1,084
+566
| +109% | +$16.4K |
|
888
ProShares UltraPro Short Dow 30
SDOW
$161M
| $208K | 0.02% |
+36
| New | +$193K |
|
889
PUT
Vertex Pharmaceuticals
VRTX
$138B
| $208K | 0.02% |
186
+45
| +32% | +$5.78K |
|
|
USG
890
DELISTED
Usg
USG
| $208K | 0.02% |
+7,844
| New | +$230K |
|
|
PF
891
DELISTED
Pinnacle Foods, Inc.
PF
| $207K | 0.02% |
4,952
-11,456
| -70% | -$518K |
|
|
SAGE
892
DELISTED
Sage Therapeutics
SAGE
| $206K | 0.02% |
4,891
+2,285
| +88% | +$141K |
|
893
CALL
Trip.com Group
TCOM
$25.8B
| $206K | 0.02% |
2,018
+1,672
| +483% | +$58.1K |
|
|
WPZ
894
PUT
DELISTED
Williams Partners L.P.
WPZ
| $206K | 0.02% |
216
+136
| +170% | +$5.69K |
|
895
PUT
Alkermes
ALKS
$7.73B
| $205K | 0.02% |
164
+158
| +2,633% | +$10.4K |
|
896
PUT
Tyson Foods
TSN
$18.1B
| $205K | 0.02% |
319
+47
| +17% | +$2K |
|
|
CLR
897
PUT
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $205K | 0.02% |
431
+328
| +318% | +$10.7K |
|
|
LFC
898
DELISTED
China Life Insurance Company Ltd.
LFC
| $205K | 0.02% |
11,812
-2,058
| -15% | -$37.5K |
|
|
ALTR
899
PUT
DELISTED
Altera Corp
ALTR
| $205K | 0.02% |
1,735
+1,152
| +198% | +$57.3K |
|
900
Invesco CurrencyShares Australian Dollar Trust
FXA
$96.3M
| $204K | 0.02% |
2,910
-1,114
| -28% | -$80.9K |
|
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 withdrew a net $47.8M in Q3 2015, closing 1,420 positions and reducing 1,391 holdings. Its most notable exit was IBM, an estimated $12.7M position sold in full.
By sector, the portfolio is most concentrated in Miscellaneous at 65% of assets, up from 42% a quarter earlier, followed by Healthcare and Communication Services.
Against the trend, Simplex Trading opened a new position in iShares Russell 2000 ETF worth $27.5M.
- 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.