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 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
TTM
476
DELISTED
Tata Motors Limited
TTM
| $773K | 0.03% |
+21,705
| New | +$793K |
|
|
TSRO
477
PUT
DELISTED
TESARO, Inc.
TSRO
| $773K | 0.03% |
702
+202
| +40% | +$32.9K |
|
478
Regency Centers
REG
$15.1B
| $772K | 0.03% |
+11,641
| New | +$798K |
|
|
OPB
479
DELISTED
Opus Bank Common Stock
OPB
| $767K | 0.03% |
38,071
+36,950
| +3,296% | +$845K |
|
480
Direxion Daily Financial Bear 3x ETF
FAZ
$89M
| $766K | 0.03% |
+99
| New | +$778K |
|
481
W.R. Berkley
WRB
$26.9B
| $766K | 0.03% |
36,629
+27,250
| +291% | +$561K |
|
482
PUT
ConocoPhillips
COP
$145B
| $763K | 0.03% |
3,661
+1,642
| +81% | +$79.3K |
|
|
FL
483
DELISTED
Foot Locker
FL
| $757K | 0.03% |
+10,126
| New | +$731K |
|
484
Invesco CurrencyShares British Pound Sterling Trust
FXB
$77.2M
| $757K | 0.03% |
6,200
-405
| -6% | -$49K |
|
485
PUT
Mondelez International
MDLZ
$78.1B
| $754K | 0.03% |
6,628
-628
| -9% | -$27.8K |
|
486
Pitney Bowes
PBI
$2.44B
| $754K | 0.03% |
+57,535
| New | +$813K |
|
487
Public Service Enterprise Group
PEG
$39.7B
| $754K | 0.03% |
+17,007
| New | +$751K |
|
|
TFCF
488
CALL
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $754K | 0.03% |
2,463
+576
| +31% | +$17.3K |
|
489
InterDigital
IDCC
$6.7B
| $752K | 0.03% |
8,718
-6,641
| -43% | -$597K |
|
490
CALL
AT&T
T
$160B
| $752K | 0.03% |
6,151
-8,195
| -57% | -$258K |
|
|
TERP
491
DELISTED
TerraForm Power, Inc
TERP
| $750K | 0.03% |
60,671
+13,055
| +27% | +$158K |
|
492
PUT
Verizon
VZ
$185B
| $747K | 0.03% |
3,677
+1,718
| +88% | +$86.2K |
|
493
Methanex
MEOH
$4.37B
| $744K | 0.03% |
15,865
+10,446
| +193% | +$501K |
|
|
SRCL
494
DELISTED
Stericycle Inc
SRCL
| $743K | 0.03% |
8,964
-43
| -0.5% | -$3.46K |
|
495
CALL
Procter & Gamble
PG
$347B
| $736K | 0.03% |
2,962
+1,070
| +57% | +$94.9K |
|
496
Immersion
IMMR
$217M
| $735K | 0.03% |
84,900
+43,076
| +103% | +$428K |
|
|
APC
497
PUT
DELISTED
Anadarko Petroleum
APC
| $735K | 0.03% |
1,843
-573
| -24% | -$38.1K |
|
498
RenaissanceRe
RNR
$13.6B
| $732K | 0.03% |
+5,065
| New | +$725K |
|
499
Service Corp International
SCI
$10.7B
| $731K | 0.03% |
+23,683
| New | +$713K |
|
|
LN
500
DELISTED
LINE Corporation
LN
| $731K | 0.03% |
19,007
-1,587
| -8% | -$54.6K |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.