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
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
ATRS
1376
DELISTED
Antares Pharma, Inc.
ATRS
| $159K | 0.01% |
+49,631
| New | +$141K |
|
|
AET
1377
PUT
DELISTED
Aetna Inc
AET
| $159K | 0.01% |
2,025
+46
| +2% | +$6.5K |
|
1378
CALL
BlackBerry
BB
$5.01B
| $158K | 0.01% |
1,876
+1,190
| +173% | +$11.7K |
|
1379
PBF Energy
PBF
$7.29B
| $158K | 0.01% |
7,112
+7,069
| +16,440% | +$152K |
|
1380
PUT
Ralph Lauren
RL
$22.2B
| $158K | 0.01% |
447
-148
| -25% | -$11.1K |
|
1381
ZTO Express
ZTO
$18.2B
| $158K | 0.01% |
+11,348
| New | +$157K |
|
|
SLCA
1382
PUT
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $158K | 0.01% |
328
-4
| -1% | -$157 |
|
|
FRC
1383
CALL
DELISTED
First Republic Bank
FRC
| $158K | 0.01% |
285
+167
| +142% | +$15.8K |
|
|
CLVS
1384
PUT
DELISTED
Clovis Oncology, Inc.
CLVS
| $158K | 0.01% |
1,239
+551
| +80% | +$33.7K |
|
|
WPX
1385
DELISTED
WPX Energy, Inc.
WPX
| $158K | 0.01% |
16,440
-20,436
| -55% | -$233K |
|
|
KERX
1386
CALL
DELISTED
Keryx Biopharmaceuticals Inc
KERX
| $158K | 0.01% |
900
+258
| +40% | +$1.61K |
|
1387
Grand Canyon Education
LOPE
$3.71B
| $157K | 0.01% |
2,015
-2,571
| -56% | -$197K |
|
1388
Mercer International
MERC
$44.9M
| $157K | 0.01% |
13,662
+11,712
| +601% | +$136K |
|
1389
PUT
Texas Instruments
TXN
$255B
| $157K | 0.01% |
1,057
+344
| +48% | +$27.6K |
|
|
TGP
1390
PUT
DELISTED
Teekay LNG Partners L.P.
TGP
| $157K | 0.01% |
1,424
-32
| -2% | -$517 |
|
1391
PUT
Bunge Global
BG
$23.6B
| $156K | 0.01% |
611
+453
| +287% | +$34.5K |
|
1392
PUT
Gen Digital
GEN
$15.6B
| $156K | 0.01% |
993
+506
| +104% | +$15.3K |
|
1393
CALL
Invesco
IVZ
$13.3B
| $156K | 0.01% |
875
+326
| +59% | +$10.6K |
|
1394
CALL
Sherwin-Williams
SHW
$78.3B
| $156K | 0.01% |
186
| – | – |
|
|
OSG
1395
Octave Specialty Group
OSG
$252M
| $155K | 0.01% |
8,982
-18,561
| -67% | -$330K |
|
1396
PUT
Fabrinet
FN
$17.1B
| $155K | 0.01% |
536
+293
| +121% | +$11K |
|
1397
PUT
Plains GP Holdings
PAGP
$5.23B
| $155K | 0.01% |
271
+69
| +34% | +$1.93K |
|
1398
Pembina Pipeline
PBA
$29.9B
| $155K | 0.01% |
+4,690
| New | +$152K |
|
1399
Gibraltar Industries
ROCK
$1.34B
| $155K | 0.01% |
4,350
+1,724
| +66% | +$60.8K |
|
1400
WPP
WPP
$4.04B
| $155K | 0.01% |
1,473
+525
| +55% | +$57.1K |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.