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 |
LNKD
LinkedIn Corporation
LNKD
|
+$21.4M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.3M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$15M |
| 4 |
Biogen
BIIB
|
+$14.9M |
| 5 |
Visa
V
|
+$14.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$36.7M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$14.7M |
| 5 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$13.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 6.61% |
| 2 | Healthcare | 6.55% |
| 3 | Technology | 6.45% |
| 4 | Consumer Discretionary | 4.54% |
| 5 | Financials | 4.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
AHT
2426
Ashford Hospitality Trust
AHT
$21M
| $33K | ﹤0.01% |
+6
| New | +$32.5K |
|
2427
CALL
Alnylam Pharmaceuticals
ALNY
$36.3B
| $33K | ﹤0.01% |
162
+106
| +189% | +$6.68K |
|
2428
PUT
AngloGold Ashanti
AU
$40.3B
| $33K | ﹤0.01% |
344
+226
| +192% | +$3.44K |
|
2429
CALL
B&G Foods
BGS
$285M
| $33K | ﹤0.01% |
110
-277
| -72% | -$11.3K |
|
2430
PUT
Cameco
CCJ
$38.3B
| $33K | ﹤0.01% |
136
+66
| +94% | +$783 |
|
2431
PUT
Ciena
CIEN
$55.3B
| $33K | ﹤0.01% |
244
+104
| +74% | +$1.88K |
|
2432
CALL
Criteo
CRTO
$1.03B
| $33K | ﹤0.01% |
154
+139
| +927% | +$5.98K |
|
2433
PUT
D.R. Horton
DHI
$41B
| $33K | ﹤0.01% |
437
+211
| +93% | +$6.44K |
|
2434
CALL
Dolby
DLB
$4.72B
| $33K | ﹤0.01% |
31
+19
| +158% | +$868 |
|
2435
Freshpet
FRPT
$2.83B
| $33K | ﹤0.01% |
3,540
+2,478
| +233% | +$21.4K |
|
2436
CALL
Masco
MAS
$16B
| $33K | ﹤0.01% |
169
-479
| -74% | -$15.1K |
|
2437
PUT
Match Group
MTCH
$8.84B
| $33K | ﹤0.01% |
+155
| New | +$2.04K |
|
2438
CALL
Repligen
RGEN
$7.44B
| $33K | ﹤0.01% |
238
+107
| +82% | +$2.74K |
|
2439
CALL
Shake Shack
SHAK
$2.3B
| $33K | ﹤0.01% |
358
+124
| +53% | +$4.5K |
|
2440
CALL
Stagwell
STGW
$1.84B
| $33K | ﹤0.01% |
+134
| New | +$2.58K |
|
2441
Universal Health Services
UHS
$9.43B
| $33K | ﹤0.01% |
+251
| New | +$33.1K |
|
2442
Vanguard FTSE Developed Markets ETF
VEA
$226B
| $33K | ﹤0.01% |
+960
| New | +$34.7K |
|
|
NBIS
2443
PUT
Nebius Group N.V.
NBIS
$47.7B
| $33K | ﹤0.01% |
84
-89
| -51% | -$1.73K |
|
|
CMRX
2444
PUT
DELISTED
Chimerix, Inc.
CMRX
| $33K | ﹤0.01% |
75
-228
| -75% | -$1.13K |
|
|
AJRD
2445
CALL
DELISTED
Aerojet Rocketdyne Holdings
AJRD
| $33K | ﹤0.01% |
+430
| New | +$7.47K |
|
|
ARNA
2446
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $33K | ﹤0.01% |
1,937
+148
| +8% | +$2.65K |
|
|
KSU
2447
PUT
DELISTED
Kansas City Southern
KSU
| $33K | ﹤0.01% |
80
+23
| +40% | +$2.09K |
|
|
GST
2448
PUT
DELISTED
Gastar Exploration Inc.
GST
| $33K | ﹤0.01% |
212
+34
| +19% | +$40 |
|
|
TVIA
2449
DELISTED
TerraVia Holdings, Inc. Common Stock
TVIA
| $33K | ﹤0.01% |
+12,746
| New | +$29.6K |
|
2450
Artivion
AORT
$1.23B
| $32K | ﹤0.01% |
2,783
+1,408
| +102% | +$16.6K |
|
Similar funds
Simplex Trading's Q2 2016 Portfolio in Review
As of Q2 2016, Simplex Trading held 7,153 positions worth $1.5B, up 19% from $1.25B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading deployed $178M of net new capital in Q2 2016, opening 1,586 new positions and adding to 2,321 existing holdings. Its largest new stake was Biogen: 56,467 shares worth $13.7M.
By sector, the portfolio is most concentrated in Communication Services at 6.6% of assets, down from 6.9% a quarter earlier, followed by Healthcare and Technology.
On the sell side, the largest reduction was Broadcom, an estimated $36.7M trimmed.
- Simplex Trading's largest Q2 2016 buy was Biogen: 56,467 shares worth $13.7M.
- Simplex Trading added most to LinkedIn Corporation in Q2 2016, an estimated $21.4M increase.
- Simplex Trading's biggest Q2 2016 reduction was Broadcom, cutting an estimated $36.7M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q2 2016, selling an estimated $20.1M.
- Simplex Trading's ten largest holdings make up 19% of its $1.5B portfolio in Q2 2016.
- Simplex Trading opened 1,586 new positions and closed 1,363 in Q2 2016.
- Simplex Trading's portfolio value rose 19% quarter-over-quarter to $1.5B.
Based on Simplex Trading's 13F filing for Q2 2016, filed 18 Jul 2016.