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 | |
|---|---|---|---|---|---|---|
|
LNKD
251
CALL
DELISTED
LinkedIn Corporation
LNKD
| $961K | 0.07% |
1,748
+186
| +12% | +$36.9K |
|
252
eBay
EBAY
$49.6B
| $959K | 0.07% |
39,275
-15,105
| -28% | -$406K |
|
|
DATA
253
DELISTED
Tableau Software, Inc.
DATA
| $955K | 0.07% |
11,980
+5,644
| +89% | +$585K |
|
|
SYT
254
DELISTED
Syngenta Ag
SYT
| $950K | 0.07% |
14,896
+9,136
| +159% | +$696K |
|
255
iShares Russell Mid-Cap ETF
IWR
$56.8B
| $948K | 0.07% |
+24,388
| New | +$1.01M |
|
256
CALL
Bank of America
BAC
$431B
| $946K | 0.07% |
4,840
+2,832
| +141% | +$47.6K |
|
257
PUT
3D Systems Corp
DDD
$446M
| $945K | 0.07% |
617
+112
| +22% | +$1.55K |
|
258
PUT
Macy's
M
$6.38B
| $939K | 0.07% |
1,175
+831
| +242% | +$52.1K |
|
259
United Parks & Resorts
PRKS
$2.16B
| $929K | 0.07% |
52,177
+44,833
| +610% | +$808K |
|
|
FIT
260
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $922K | 0.07% |
24,472
+4,938
| +25% | +$202K |
|
|
AMJ
261
DELISTED
JP Morgan Alerian MLP Index ETN 5/24/24
AMJ
| $919K | 0.07% |
30,248
+29,498
| +3,933% | +$1.06M |
|
|
SUNE
262
DELISTED
SUNEDISON, INC COM
SUNE
| $918K | 0.07% |
127,965
+108,559
| +559% | +$1.95M |
|
|
KKD
263
DELISTED
KRISPY KREME DOUGHNUTS INC
KKD
| $906K | 0.07% |
61,929
+9,464
| +18% | +$166K |
|
264
PUT
Yelp
YELP
$1.38B
| $902K | 0.07% |
582
-2,430
| -81% | -$67.4K |
|
265
Alkermes
ALKS
$8.8B
| $898K | 0.07% |
+15,314
| New | +$1.01M |
|
266
iShares MSCI Taiwan ETF
EWT
$10.4B
| $893K | 0.07% |
33,933
+32,158
| +1,812% | +$904K |
|
|
ESV
267
PUT
DELISTED
Ensco Rowan plc
ESV
| $890K | 0.07% |
108
+17
| +19% | +$1.17K |
|
268
CALL
ExxonMobil
XOM
$641B
| $884K | 0.06% |
6,030
+3,612
| +149% | +$278K |
|
269
Parker-Hannifin
PH
$122B
| $877K | 0.06% |
+9,018
| New | +$979K |
|
270
PUT
lululemon athletica
LULU
$12.9B
| $873K | 0.06% |
1,395
+800
| +134% | +$48.8K |
|
271
Synchrony
SYF
$24.1B
| $873K | 0.06% |
27,915
-9,934
| -26% | -$330K |
|
272
ProShares UltraPro Short S&P 500
SPXU
$420M
| $861K | 0.06% |
53
+47
| +783% | +$678K |
|
|
JOYY
273
JOYY Inc
JOYY
$3.65B
| $858K | 0.06% |
15,747
+6,107
| +63% | +$352K |
|
274
VanEck Oil Services ETF
OIH
$2.06B
| $855K | 0.06% |
+1,556
| New | +$954K |
|
|
WBA
275
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $853K | 0.06% |
2,654
+1,747
| +193% | +$158K |
|
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.