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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CLR
576
CALL
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $474K | 0.03% |
511
-377
| -42% | -$19.5K |
|
577
Vanguard FTSE Emerging Markets ETF
VWO
$121B
| $473K | 0.03% |
13,226
-23,609
| -64% | -$865K |
|
|
ZLTQ
578
DELISTED
ZELTIQ Aesthetics, Inc.
ZLTQ
| $472K | 0.03% |
10,853
+5,026
| +86% | +$203K |
|
579
DTE Energy
DTE
$30.9B
| $471K | 0.03% |
+5,626
| New | +$452K |
|
580
CALL
ProShares UltraShort Health Care
RXD
$3.38M
| $471K | 0.03% |
1,647
+263
| +19% | +$49K |
|
581
CALL
Sysco
SYY
$39.3B
| $470K | 0.03% |
938
+394
| +72% | +$20.5K |
|
582
Tenet Healthcare
THC
$16.8B
| $470K | 0.03% |
+31,703
| New | +$569K |
|
583
CALL
Visa
V
$672B
| $467K | 0.03% |
3,750
+1,578
| +73% | +$127K |
|
584
Stanley Black & Decker
SWK
$13.9B
| $466K | 0.03% |
+4,066
| New | +$484K |
|
585
PUT
Blackstone
BX
$150B
| $463K | 0.03% |
3,456
+617
| +22% | +$16K |
|
586
Veracyte
VCYT
$4.63B
| $462K | 0.03% |
59,782
+57,194
| +2,210% | +$428K |
|
|
SLCA
587
CALL
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $461K | 0.03% |
520
+63
| +14% | +$3.11K |
|
588
CALL
Dollar General
DG
$26.5B
| $460K | 0.03% |
677
-209
| -24% | -$15.3K |
|
589
PUT
Sarepta Therapeutics
SRPT
$1.67B
| $460K | 0.03% |
934
-2,827
| -75% | -$114K |
|
|
BID
590
DELISTED
Sotheby's
BID
| $460K | 0.03% |
11,565
+7,507
| +185% | +$285K |
|
591
PUT
Walmart Inc
WMT
$870B
| $458K | 0.03% |
6,714
-849
| -11% | -$19.8K |
|
|
DCH
592
Dauch Corp
DCH
$1.35B
| $457K | 0.03% |
+23,681
| New | +$401K |
|
593
Coty
COTY
$2.4B
| $457K | 0.03% |
24,975
-51,712
| -67% | -$1.07M |
|
594
Teck Resources
TECK
$28B
| $457K | 0.03% |
22,862
-45,090
| -66% | -$976K |
|
|
MNDT
595
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $457K | 0.03% |
38,410
+12,393
| +48% | +$161K |
|
596
American Tower
AMT
$77.4B
| $454K | 0.03% |
4,302
-10,824
| -72% | -$1.18M |
|
|
SNI
597
DELISTED
Scripps Networks Interactive, Inc Common Class A
SNI
| $454K | 0.03% |
+6,374
| New | +$431K |
|
598
CALL
Williams Companies
WMB
$91.1B
| $451K | 0.03% |
2,730
-1,388
| -34% | -$41.8K |
|
|
STON
599
PUT
DELISTED
StoneMor Inc.
STON
| $451K | 0.03% |
359
+320
| +821% | +$4.49K |
|
|
INFO
600
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $451K | 0.03% |
+12,751
| New | +$458K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.