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 | |
|---|---|---|---|---|---|---|
351
PUT
T-Mobile US
TMUS
$207B
| $1.04M | 0.05% |
5,441
+3,640
| +202% | +$237K |
|
352
CALL
Walt Disney
DIS
$166B
| $1.04M | 0.05% |
4,240
-1,103
| -21% | -$121K |
|
|
HOUS
353
DELISTED
Anywhere Real Estate
HOUS
| $1.03M | 0.04% |
31,812
+10,534
| +50% | +$319K |
|
354
CALL
Adobe
ADBE
$86.8B
| $1.03M | 0.04% |
1,231
+293
| +31% | +$40.1K |
|
355
CALL
Charter Communications
CHTR
$15.9B
| $1.03M | 0.04% |
613
+125
| +26% | +$41.7K |
|
356
Diamondback Energy
FANG
$57.1B
| $1.03M | 0.04% |
11,563
+1,527
| +15% | +$148K |
|
357
CALL
ProShares Ultra S&P500
SSO
$8.02B
| $1.02M | 0.04% |
16,848
+6,488
| +63% | +$71K |
|
358
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $1.02M | 0.04% |
838
-114
| -12% | -$13.7K |
|
|
AABA
359
CALL
DELISTED
Altaba Inc
AABA
| $1.01M | 0.04% |
+1,231
| New | +$67K |
|
360
CALL
Union Pacific
UNP
$174B
| $1.01M | 0.04% |
2,667
-31
| -1% | -$3.38K |
|
|
TERP
361
DELISTED
TerraForm Power, Inc
TERP
| $1.01M | 0.04% |
84,205
+23,534
| +39% | +$288K |
|
|
WW
362
CALL
DELISTED
WW International
WW
| $1.01M | 0.04% |
821
+276
| +51% | +$6.67K |
|
|
CHL
363
DELISTED
China Mobile Limited
CHL
| $1.01M | 0.04% |
+18,966
| New | +$1.03M |
|
364
CALL
Baidu
BIDU
$36.6B
| $1M | 0.04% |
1,184
-1,288
| -52% | -$233K |
|
365
Evolent Health
EVH
$627M
| $998K | 0.04% |
39,374
-3,797
| -9% | -$91.3K |
|
|
COL
366
DELISTED
Rockwell Collins
COL
| $995K | 0.04% |
+9,478
| New | +$982K |
|
367
Take-Two Interactive
TTWO
$43.4B
| $991K | 0.04% |
13,506
-3,452
| -20% | -$236K |
|
368
CALL
MGM Resorts International
MGM
$11.6B
| $985K | 0.04% |
5,677
+1,681
| +42% | +$52K |
|
369
United Therapeutics
UTHR
$26.2B
| $985K | 0.04% |
+7,593
| New | +$947K |
|
370
CALL
eBay
EBAY
$49.3B
| $982K | 0.04% |
1,659
-532
| -24% | -$18.2K |
|
371
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.56B
| $980K | 0.04% |
74,250
+19,500
| +36% | +$143K |
|
372
KraneShares CSI China Internet ETF
KWEB
$5.23B
| $976K | 0.04% |
+20,391
| New | +$949K |
|
373
Hormel Foods
HRL
$13.9B
| $968K | 0.04% |
28,389
+19,060
| +204% | +$657K |
|
374
iShares US Medical Devices ETF
IHI
$2.97B
| $965K | 0.04% |
+34,764
| New | +$920K |
|
375
Fabrinet
FN
$18.4B
| $963K | 0.04% |
22,578
+16,572
| +276% | +$624K |
|
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.