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 | |
|---|---|---|---|---|---|---|
526
PUT
McDonald's
MCD
$187B
| $480K | 0.03% |
3,962
-1,009
| -20% | -$120K |
|
527
CALL
Goldman Sachs
GS
$324B
| $478K | 0.03% |
2,423
-3,513
| -59% | -$571K |
|
528
PUT
Microsoft
MSFT
$2.9T
| $478K | 0.03% |
8,393
-145
| -2% | -$8.19K |
|
529
CALL
Gen Digital
GEN
$15.4B
| $476K | 0.03% |
1,436
-238
| -14% | -$5.41K |
|
530
ProShares Ultra Silver
AGQ
$1.22B
| $475K | 0.03% |
9,884
+2,233
| +29% | +$114K |
|
|
FISV
531
Fiserv Inc
FISV
$26.8B
| $475K | 0.03% |
9,556
-30,034
| -76% | -$1.58M |
|
532
PUT
Occidental Petroleum
OXY
$57.2B
| $475K | 0.03% |
2,001
+991
| +98% | +$74.2K |
|
|
CSOD
533
DELISTED
Cornerstone OnDemand, Inc.
CSOD
| $475K | 0.03% |
10,344
-8,004
| -44% | -$351K |
|
534
Digital Realty Trust
DLR
$66B
| $474K | 0.03% |
4,883
+3,004
| +160% | +$306K |
|
535
Trane Technologies
TT
$105B
| $474K | 0.03% |
+6,979
| New | +$465K |
|
|
MBLY
536
DELISTED
Mobileye N.V.
MBLY
| $474K | 0.03% |
+11,137
| New | +$515K |
|
|
MRO
537
DELISTED
Marathon Oil Corporation
MRO
| $473K | 0.03% |
29,930
-65,525
| -69% | -$973K |
|
|
VMW
538
PUT
DELISTED
VMware, Inc
VMW
| $473K | 0.03% |
1,033
+416
| +67% | +$29.3K |
|
|
BOBE
539
DELISTED
Bob Evans Farms, Inc.
BOBE
| $473K | 0.03% |
+12,352
| New | +$465K |
|
540
Ovintiv
OVV
$17B
| $471K | 0.03% |
9,015
-11,335
| -56% | -$509K |
|
|
MACK
541
DELISTED
Merrimack Pharmaceuticals, Inc.
MACK
| $470K | 0.03% |
9,420
+8,551
| +984% | +$355K |
|
542
PUT
Macy's
M
$6.4B
| $469K | 0.03% |
1,421
-1,271
| -47% | -$46.1K |
|
543
Brookdale Senior Living
BKD
$3.5B
| $466K | 0.03% |
26,754
+990
| +4% | +$17.1K |
|
544
iShares S&P 100 ETF
OEF
$20.1B
| $466K | 0.03% |
4,861
+3,155
| +185% | +$303K |
|
545
Amkor Technology
AMKR
$16.6B
| $465K | 0.03% |
+47,901
| New | +$384K |
|
546
PUT
AbbVie
ABBV
$448B
| $464K | 0.03% |
2,156
+95
| +5% | +$6.15K |
|
547
EQT Corp
EQT
$33.8B
| $463K | 0.03% |
+11,729
| New | +$464K |
|
|
NBIS
548
Nebius Group N.V.
NBIS
$55.4B
| $463K | 0.03% |
+22,041
| New | +$479K |
|
549
CALL
Adobe
ADBE
$86.8B
| $460K | 0.03% |
1,202
+564
| +88% | +$56.6K |
|
550
Travere Therapeutics
TVTX
$5.23B
| $459K | 0.03% |
20,531
+15,719
| +327% | +$299K |
|
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.