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 |
Amazon
AMZN
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SHPG
3276
CALL
DELISTED
Shire pic
SHPG
| $18K | ﹤0.01% |
72
-353
| -83% | -$55.3K |
|
|
AMED
3277
DELISTED
Amedisys
AMED
| $17K | ﹤0.01% |
+309
| New | +$16.3K |
|
3278
PUT
Banc of California
BANC
$3.21B
| $17K | ﹤0.01% |
717
-345
| -32% | -$6.8K |
|
3279
B&G Foods
BGS
$291M
| $17K | ﹤0.01% |
546
-253
| -32% | -$8.31K |
|
|
BPT
3280
PUT
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $17K | ﹤0.01% |
158
-11
| -7% | -$224 |
|
3281
PUT
Celldex Therapeutics
CLDX
$2.8B
| $17K | ﹤0.01% |
11
-2
| -15% | -$75 |
|
3282
PUT
Centene
CNC
$31.6B
| $17K | ﹤0.01% |
458
-286
| -38% | -$12.3K |
|
3283
CALL
Dominion Energy
D
$61.8B
| $17K | ﹤0.01% |
233
-152
| -39% | -$11.8K |
|
3284
Amdocs
DOX
$5.64B
| $17K | ﹤0.01% |
+265
| New | +$17.1K |
|
3285
PUT
Eaton
ETN
$155B
| $17K | ﹤0.01% |
299
-638
| -68% | -$48.1K |
|
3286
CALL
Fluor
FLR
$7.22B
| $17K | ﹤0.01% |
350
+63
| +22% | +$2.61K |
|
3287
PUT
Greif
GEF
$4.56B
| $17K | ﹤0.01% |
+225
| New | +$12.8K |
|
3288
Genie Energy
GNE
$378M
| $17K | ﹤0.01% |
+2,747
| New | +$17.5K |
|
3289
Goldgroup Mining Inc.
GORO
$162M
| $17K | ﹤0.01% |
4,654
-7,293
| -61% | -$28.4K |
|
3290
PUT
GSK
GSK
$104B
| $17K | ﹤0.01% |
195
+6
| +3% | +$304 |
|
3291
PUT
Hewlett Packard
HPE
$63.8B
| $17K | ﹤0.01% |
631
-124
| -16% | -$1.69K |
|
3292
CALL
Kulicke & Soffa
KLIC
$5.14B
| $17K | ﹤0.01% |
130
+55
| +73% | +$1.1K |
|
3293
PUT
Lamar Advertising Co
LAMR
$16.3B
| $17K | ﹤0.01% |
+607
| New | +$41.1K |
|
3294
PUT
Logitech
LOGI
$15.5B
| $17K | ﹤0.01% |
144
-216
| -60% | -$7.87K |
|
3295
LXP Industrial Trust
LXP
$3.52B
| $17K | ﹤0.01% |
335
+144
| +75% | +$7.2K |
|
3296
PUT
Martin Marietta Materials
MLM
$34.3B
| $17K | ﹤0.01% |
121
-41
| -25% | -$8.67K |
|
3297
PUT
Marvell Technology
MRVL
$170B
| $17K | ﹤0.01% |
775
+727
| +1,515% | +$12.1K |
|
3298
PUT
Realty Income
O
$61.1B
| $17K | ﹤0.01% |
208
+12
| +6% | +$667 |
|
3299
PUT
Open Text
OTEX
$5.73B
| $17K | ﹤0.01% |
154
-88
| -36% | -$2.85K |
|
3300
PUT
Parker-Hannifin
PH
$124B
| $17K | ﹤0.01% |
177
-20
| -10% | -$3.28K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.