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 | |
|---|---|---|---|---|---|---|
401
PUT
Walmart Inc
WMT
$870B
| $905K | 0.04% |
14,232
+3,402
| +31% | +$86.4K |
|
402
Dollar Tree
DLTR
$23.5B
| $903K | 0.04% |
12,925
-61,745
| -83% | -$4.77M |
|
403
TE Connectivity
TEL
$58.5B
| $902K | 0.04% |
+11,465
| New | +$877K |
|
404
Canadian Solar
CSIQ
$1.05B
| $897K | 0.04% |
56,390
+56,190
| +28,095% | +$752K |
|
405
Melco Resorts & Entertainment
MLCO
$2.12B
| $897K | 0.04% |
39,970
+11,100
| +38% | +$242K |
|
406
Supernus Pharmaceuticals
SUPN
$2.72B
| $897K | 0.04% |
20,814
-6,633
| -24% | -$236K |
|
407
CALL
CSX Corp
CSX
$92.8B
| $895K | 0.04% |
7,227
-4,707
| -39% | -$80.6K |
|
408
CALL
Autodesk
ADSK
$43B
| $894K | 0.04% |
1,122
+458
| +69% | +$45.3K |
|
409
CALL
IBM
IBM
$193B
| $891K | 0.04% |
4,250
-1,641
| -28% | -$247K |
|
410
CALL
Applied Materials
AMAT
$440B
| $890K | 0.04% |
2,212
-1,803
| -45% | -$76.6K |
|
|
SINA
411
DELISTED
Sina Corp
SINA
| $887K | 0.04% |
10,445
-7,614
| -42% | -$641K |
|
412
Zions Bancorporation
ZION
$10.3B
| $886K | 0.04% |
+20,200
| New | +$832K |
|
413
Vipshop
VIPS
$7.05B
| $882K | 0.04% |
+83,638
| New | +$1.09M |
|
|
TWTR
414
CALL
DELISTED
Twitter, Inc.
TWTR
| $882K | 0.04% |
6,777
+2,653
| +64% | +$45.2K |
|
415
PUT
Mastercard
MA
$470B
| $878K | 0.04% |
2,117
+260
| +14% | +$30.8K |
|
|
PE
416
DELISTED
PARSLEY ENERGY INC
PE
| $870K | 0.04% |
31,363
-5,721
| -15% | -$170K |
|
417
CALL
XPO
XPO
$25.1B
| $868K | 0.04% |
1,709
-49
| -3% | -$918 |
|
|
REN
418
DELISTED
Resolute Energy Corporaton
REN
| $868K | 0.04% |
29,177
+28,611
| +5,055% | +$1.1M |
|
419
Fossil Group
FOSL
$246M
| $866K | 0.04% |
83,694
+78,970
| +1,672% | +$1.07M |
|
420
Electronic Arts
EA
$52.4B
| $865K | 0.04% |
+8,186
| New | +$843K |
|
421
International Flavors & Fragrances
IFF
$19.7B
| $864K | 0.04% |
6,400
-3,547
| -36% | -$481K |
|
422
CALL
Visa
V
$672B
| $864K | 0.04% |
3,664
+115
| +3% | +$10.7K |
|
423
Trane Technologies
TT
$105B
| $862K | 0.04% |
+9,434
| New | +$828K |
|
424
CALL
Zillow
Z
$7.18B
| $861K | 0.04% |
1,087
+840
| +340% | +$35.2K |
|
425
PUT
Salesforce
CRM
$133B
| $860K | 0.04% |
6,100
+3,622
| +146% | +$315K |
|
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.