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 | |
|---|---|---|---|---|---|---|
476
G-III Apparel Group
GIII
$1.51B
| $526K | 0.04% |
18,067
+15,844
| +713% | +$622K |
|
477
Deckers Outdoor
DECK
$14.2B
| $525K | 0.04% |
+52,980
| New | +$555K |
|
478
PUT
AT&T
T
$160B
| $525K | 0.04% |
8,719
-805
| -8% | -$25.4K |
|
479
PUT
ConocoPhillips
COP
$145B
| $521K | 0.04% |
2,734
-384
| -12% | -$16K |
|
480
CALL
Salesforce
CRM
$133B
| $521K | 0.04% |
2,886
+1,290
| +81% | +$101K |
|
|
EXPR
481
DELISTED
Express, Inc.
EXPR
| $520K | 0.04% |
2,208
+2,037
| +1,191% | +$552K |
|
482
PUT
Costco
COST
$411B
| $519K | 0.04% |
5,612
+3,906
| +229% | +$631K |
|
483
PUT
Delta Air Lines
DAL
$54.9B
| $519K | 0.04% |
2,685
-811
| -23% | -$30.7K |
|
484
PUT
Expedia Group
EXPE
$31.3B
| $519K | 0.04% |
1,361
+608
| +81% | +$68.8K |
|
485
Live Nation Entertainment
LYV
$41.4B
| $519K | 0.04% |
18,914
+18,064
| +2,125% | +$471K |
|
486
Netflix
NFLX
$285B
| $519K | 0.04% |
+52,740
| New | +$503K |
|
|
CTXS
487
DELISTED
Citrix Systems Inc
CTXS
| $518K | 0.04% |
+7,640
| New | +$520K |
|
488
CALL
MetLife
MET
$60B
| $516K | 0.04% |
3,816
+1,366
| +56% | +$51.4K |
|
|
VNET
489
VNET Group
VNET
$2.23B
| $516K | 0.04% |
+64,978
| New | +$600K |
|
490
CALL
United Parcel Service
UPS
$98.5B
| $513K | 0.03% |
1,272
-2,815
| -69% | -$307K |
|
|
GNC
491
DELISTED
GNC Holdings, Inc.
GNC
| $513K | 0.03% |
25,130
+11,639
| +86% | +$255K |
|
|
RSX
492
DELISTED
VanEck Russia ETF
RSX
| $512K | 0.03% |
27,311
-34,014
| -55% | -$623K |
|
493
InterDigital
IDCC
$6.7B
| $511K | 0.03% |
+6,464
| New | +$432K |
|
|
SKX
494
DELISTED
Skechers
SKX
| $509K | 0.03% |
22,250
+592
| +3% | +$15.1K |
|
495
AAR Corp
AIR
$5.07B
| $507K | 0.03% |
+16,198
| New | +$412K |
|
496
Invesco DB Agriculture Fund
DBA
$1.26B
| $507K | 0.03% |
+25,398
| New | +$527K |
|
497
Blackrock
BLK
$164B
| $505K | 0.03% |
+1,396
| New | +$508K |
|
|
498
CALL
Wells Fargo
WFC
$262B
| $503K | 0.03% |
4,400
-1,321
| -23% | -$63.2K |
|
499
CALL
Intuitive Surgical
ISRG
$121B
| $502K | 0.03% |
1,206
-9
| -0.7% | -$689 |
|
500
PUT
Viatris
VTRS
$19.8B
| $502K | 0.03% |
1,435
+35
| +3% | +$1.56K |
|
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.