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 | |
|---|---|---|---|---|---|---|
951
PUT
Wheaton Precious Metals
WPM
$50B
| $189K | 0.01% |
277
+159
| +135% | +$2.08K |
|
952
YPF
YPF
$20.4B
| $189K | 0.01% |
12,444
-34,594
| -74% | -$774K |
|
|
BXLT
953
DELISTED
BAXALTA INC COM STK (DE)
BXLT
| $189K | 0.01% |
+6,027
| New | +$208K |
|
954
PUT
Norfolk Southern
NSC
$78.3B
| $188K | 0.01% |
214
+95
| +80% | +$7.72K |
|
955
PUT
Pfizer
PFE
$143B
| $188K | 0.01% |
2,705
+2,368
| +703% | +$75.9K |
|
956
CALL
RH
RH
$3.14B
| $188K | 0.01% |
494
+177
| +56% | +$17.4K |
|
|
SAFM
957
PUT
DELISTED
Sanderson Farms Inc
SAFM
| $188K | 0.01% |
59
+14
| +31% | +$980 |
|
|
DVAX
958
DELISTED
Dynavax Technologies
DVAX
| $187K | 0.01% |
7,626
-13,172
| -63% | -$373K |
|
959
PUT
Herc Holdings
HRI
$5.45B
| $187K | 0.01% |
68
-31
| -31% | -$1.62K |
|
960
Warner Bros
WBD
$65.1B
| $187K | 0.01% |
+7,192
| New | +$213K |
|
|
LLL
961
DELISTED
L3 Technologies, Inc.
LLL
| $187K | 0.01% |
+1,795
| New | +$202K |
|
962
PUT
Core Laboratories
CLB
$544M
| $186K | 0.01% |
87
+46
| +112% | +$5K |
|
963
PUT
Sony
SONY
$122B
| $186K | 0.01% |
1,710
-25
| -1% | -$133 |
|
964
CALL
Teva Pharmaceuticals
TEVA
$36.3B
| $186K | 0.01% |
3,282
+1,649
| +101% | +$107K |
|
|
OAK
965
DELISTED
OAKTREE CAPITAL GROUP, LLC
OAK
| $186K | 0.01% |
+3,764
| New | +$199K |
|
966
CALL
LyondellBasell Industries
LYB
$19.9B
| $185K | 0.01% |
918
+512
| +126% | +$45.5K |
|
967
PUT
Mondelez International
MDLZ
$77.1B
| $185K | 0.01% |
1,414
+1,369
| +3,042% | +$59K |
|
968
PUT
Parker-Hannifin
PH
$124B
| $185K | 0.01% |
258
+242
| +1,513% | +$26.3K |
|
969
PUT
Alnylam Pharmaceuticals
ALNY
$35.9B
| $184K | 0.01% |
73
+41
| +128% | +$4.55K |
|
970
PUT
Medtronic
MDT
$105B
| $184K | 0.01% |
483
+115
| +31% | +$8.47K |
|
|
SAGE
971
PUT
DELISTED
Sage Therapeutics
SAGE
| $184K | 0.01% |
57
-15
| -21% | -$924 |
|
972
iShares MSCI Japan Small-Cap ETF
SCJ
$247M
| $184K | 0.01% |
3,330
-4,825
| -59% | -$275K |
|
973
ProShares Short VIX Short-Term Futures ETF
SVXY
$218M
| $184K | 0.01% |
3,874
+3,574
| +1,191% | +$260K |
|
974
CALL
Fortinet
FTNT
$111B
| $183K | 0.01% |
1,465
+350
| +31% | +$3.1K |
|
|
JUNO
975
CALL
DELISTED
Juno Therapeutics, Inc.
JUNO
| $183K | 0.01% |
575
+193
| +51% | +$8.46K |
|
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.