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 |
Gilead Sciences
GILD
|
+$17.3M |
| 2 |
Apple
AAPL
|
+$15.2M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$14.9M |
| 4 |
Booking.com
BKNG
|
+$14.7M |
| 5 |
Wells Fargo
WFC
|
+$12.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
SPDR Gold Trust
GLD
|
+$38.3M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
+$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
+$12.6M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
+$10.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.39% |
| 2 | Healthcare | 8.28% |
| 3 | Consumer Discretionary | 6.84% |
| 4 | Technology | 6.06% |
| 5 | Financials | 4.39% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
351
PTC
PTC
$13.3B
| $740K | 0.05% |
16,714
+6,084
| +57% | +$252K |
|
352
CALL
Huntsman Corp
HUN
$2.28B
| $737K | 0.05% |
2,024
+1,533
| +312% | +$24.3K |
|
353
PUT
Eli Lilly
LLY
$1.04T
| $735K | 0.05% |
4,865
+2,307
| +90% | +$185K |
|
354
AMC Global Media
AMCX
$445M
| $734K | 0.05% |
+14,172
| New | +$776K |
|
355
Ball Corp
BALL
$16.7B
| $731K | 0.05% |
17,856
-14,506
| -45% | -$554K |
|
356
Equity Residential
EQR
$25.5B
| $731K | 0.05% |
+11,365
| New | +$758K |
|
357
PUT
Amgen
AMGN
$199B
| $730K | 0.05% |
2,951
-143
| -5% | -$24.2K |
|
358
Vertex Pharmaceuticals
VRTX
$121B
| $729K | 0.05% |
8,368
+4,449
| +114% | +$420K |
|
359
CALL
Workday
WDAY
$33.3B
| $729K | 0.05% |
599
+320
| +115% | +$26.7K |
|
360
TAL Education Group
TAL
$5.72B
| $728K | 0.05% |
+61,704
| New | +$651K |
|
361
PUT
Blackstone
BX
$150B
| $727K | 0.05% |
2,839
+1,479
| +109% | +$39K |
|
362
CALL
Applied Materials
AMAT
$445B
| $718K | 0.05% |
2,976
+1,880
| +172% | +$52.5K |
|
|
WFM
363
DELISTED
Whole Foods Market Inc
WFM
| $715K | 0.05% |
25,252
-24,813
| -50% | -$764K |
|
364
American Eagle Outfitters
AEO
$2.93B
| $712K | 0.05% |
39,916
+22,034
| +123% | +$395K |
|
365
America Movil
AMX
$78.3B
| $710K | 0.05% |
62,081
-21,115
| -25% | -$252K |
|
|
366
CALL
Eli Lilly
LLY
$1.04T
| $710K | 0.05% |
2,756
+602
| +28% | +$48.2K |
|
367
Acadia Pharmaceuticals
ACAD
$4.3B
| $709K | 0.05% |
22,315
-1,775
| -7% | -$60.2K |
|
|
JWN
368
CALL
DELISTED
Nordstrom
JWN
| $709K | 0.05% |
1,400
+635
| +83% | +$29.8K |
|
369
CALL
Merck
MRK
$316B
| $706K | 0.05% |
3,135
-1,979
| -39% | -$116K |
|
|
IM
370
DELISTED
Ingram Micro
IM
| $706K | 0.05% |
19,816
-27,293
| -58% | -$947K |
|
371
CALL
GE Aerospace
GE
$357B
| $704K | 0.05% |
1,181
-329
| -22% | -$49.1K |
|
372
Casey's General Stores
CASY
$31.9B
| $701K | 0.05% |
+5,841
| New | +$752K |
|
373
Oracle
ORCL
$362B
| $697K | 0.05% |
+17,761
| New | +$724K |
|
|
CYBR
374
DELISTED
CyberArk
CYBR
| $695K | 0.05% |
+14,031
| New | +$747K |
|
375
CALL
ProShares Ultra S&P500
SSO
$8.06B
| $693K | 0.05% |
11,696
-3,776
| -24% | -$33.3K |
|
Similar funds
Simplex Trading's Q3 2016 Portfolio in Review
As of Q3 2016, Simplex Trading held 7,235 positions worth $1.48B, down 1.4% from $1.5B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $87.1M in Q3 2016, closing 1,479 positions and reducing 1,939 holdings. Its most notable exit was SPDR Gold Trust, an estimated $38.3M position sold in full.
By sector, the portfolio is most concentrated in Communication Services at 8.4% of assets, up from 6.6% a quarter earlier, followed by Healthcare and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Booking.com worth $15.6M.
- Simplex Trading's largest Q3 2016 buy was Booking.com: 264,225 shares worth $15.6M.
- Simplex Trading added most to Gilead Sciences in Q3 2016, an estimated $17.3M increase.
- Simplex Trading's biggest Q3 2016 reduction was LinkedIn Corporation, cutting an estimated $15.2M.
- Simplex Trading fully exited SPDR Gold Trust in Q3 2016, selling an estimated $38.3M.
- Simplex Trading's ten largest holdings make up 18% of its $1.48B portfolio in Q3 2016.
- Simplex Trading opened 1,460 new positions and closed 1,479 in Q3 2016.
- Simplex Trading's portfolio value fell 1.4% quarter-over-quarter to $1.48B.
Based on Simplex Trading's 13F filing for Q3 2016, filed 7 Oct 2016.