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 | |
|---|---|---|---|---|---|---|
1551
AllianceBernstein
AB
$3.47B
| $125K | 0.01% |
+5,478
| New | +$127K |
|
1552
Honda
HMC
$36.5B
| $125K | 0.01% |
4,154
+3,369
| +429% | +$104K |
|
1553
PUT
Nabors Industries
NBR
$1.23B
| $125K | 0.01% |
12
-2
| -14% | -$1.53K |
|
1554
PUT
Whirlpool
WHR
$2.42B
| $125K | 0.01% |
321
-271
| -46% | -$48.1K |
|
|
YRD
1555
Yiren Digital
YRD
$103M
| $125K | 0.01% |
4,986
+4,897
| +5,502% | +$117K |
|
|
PRTK
1556
CALL
DELISTED
Paratek Pharmaceuticals, Inc.
PRTK
| $125K | 0.01% |
294
+243
| +476% | +$3.83K |
|
|
FRED
1557
PUT
DELISTED
Fred's Inc
FRED
| $125K | 0.01% |
543
+189
| +53% | +$2.98K |
|
|
SALE
1558
DELISTED
RetailMeNot, Inc. Series 1
SALE
| $125K | 0.01% |
+15,541
| New | +$137K |
|
1559
PUT
Acadia Pharmaceuticals
ACAD
$4.25B
| $124K | 0.01% |
857
-128
| -13% | -$4.52K |
|
1560
PUT
CarMax
KMX
$8.27B
| $124K | 0.01% |
502
-195
| -28% | -$12.7K |
|
1561
CALL
Sherwin-Williams
SHW
$78.3B
| $124K | 0.01% |
186
+39
| +27% | +$3.93K |
|
1562
PUT
SiriusXM
SIRI
$10B
| $124K | 0.01% |
194
+183
| +1,664% | +$8.99K |
|
|
LFC
1563
DELISTED
China Life Insurance Company Ltd.
LFC
| $124K | 0.01% |
8,125
-1,116
| -12% | -$16.5K |
|
|
MACK
1564
DELISTED
Merrimack Pharmaceuticals, Inc.
MACK
| $124K | 0.01% |
5,135
-2,657
| -34% | -$66.5K |
|
|
GOLD
1565
CALL
DELISTED
Randgold Resources Ltd
GOLD
| $124K | 0.01% |
408
-3
| -0.7% | -$262 |
|
1566
PUT
AngloGold Ashanti
AU
$40.3B
| $123K | 0.01% |
1,227
+936
| +322% | +$10.9K |
|
1567
CALL
C.H. Robinson
CHRW
$22B
| $123K | 0.01% |
642
-194
| -23% | -$14.9K |
|
1568
iShares MSCI Spain ETF
EWP
$1.98B
| $123K | 0.01% |
4,045
-3,158
| -44% | -$88.5K |
|
1569
CALL
Twilio
TWLO
$29.1B
| $123K | 0.01% |
1,408
+787
| +127% | +$23.8K |
|
|
VIVO
1570
DELISTED
Meridian Bioscience Inc
VIVO
| $123K | 0.01% |
8,982
+4,578
| +104% | +$64K |
|
|
UWC
1571
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $123K | 0.01% |
533
-240
| -31% | -$55.4K |
|
1572
CALL
Dover
DOV
$27.2B
| $122K | 0.01% |
477
+390
| +448% | +$24.9K |
|
|
SAGE
1573
PUT
DELISTED
Sage Therapeutics
SAGE
| $122K | 0.01% |
295
-145
| -33% | -$8.49K |
|
|
TGNA
1574
DELISTED
TEGNA Inc
TGNA
| $122K | 0.01% |
7,488
-1,573
| -17% | -$24.2K |
|
1575
CALL
Williams-Sonoma
WSM
$26.7B
| $122K | 0.01% |
824
+712
| +636% | +$17.3K |
|
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.