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 | |
|---|---|---|---|---|---|---|
|
PE
326
DELISTED
PARSLEY ENERGY INC
PE
| $1.21M | 0.05% |
37,084
+30,372
| +453% | +$1.01M |
|
327
PUT
Bristol-Myers Squibb
BMY
$124B
| $1.2M | 0.05% |
5,174
+1,876
| +57% | +$103K |
|
328
CALL
ConocoPhillips
COP
$145B
| $1.18M | 0.05% |
4,373
+5
| +0.1% | +$242 |
|
|
CATM
329
DELISTED
Cardtronics plc Class A Ordinary Shares (UK)
CATM
| $1.18M | 0.05% |
25,262
+15,579
| +161% | +$765K |
|
330
ManpowerGroup
MAN
$2.4B
| $1.18M | 0.05% |
11,499
+8,051
| +233% | +$781K |
|
331
Direxion Daily Junior Gold Miners Index Bear 2X ETF
JDST
$28.9M
| $1.17M | 0.05% |
4
+3
| +300% | +$1.04M |
|
332
PUT
Twilio
TWLO
$27.8B
| $1.17M | 0.05% |
2,158
+1,660
| +333% | +$50.2K |
|
333
CALL
Baidu
BIDU
$36.6B
| $1.17M | 0.05% |
2,472
+70
| +3% | +$12.3K |
|
334
CALL
Trip.com Group
TCOM
$26.8B
| $1.17M | 0.05% |
1,798
-250
| -12% | -$11.5K |
|
335
Agnico Eagle Mines
AEM
$73.5B
| $1.16M | 0.05% |
+27,361
| New | +$1.23M |
|
|
AVXS
336
DELISTED
AveXis, Inc. Common Stock
AVXS
| $1.16M | 0.05% |
+15,240
| New | +$943K |
|
|
ATVI
337
CALL
DELISTED
Activision Blizzard
ATVI
| $1.15M | 0.05% |
2,334
+333
| +17% | +$14.6K |
|
338
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.56B
| $1.15M | 0.05% |
54,750
+25,580
| +88% | +$155K |
|
339
Kroger
KR
$35.3B
| $1.13M | 0.05% |
+38,425
| New | +$1.23M |
|
|
GRA
340
DELISTED
W.R. Grace & Co.
GRA
| $1.13M | 0.05% |
16,239
+6,318
| +64% | +$443K |
|
341
CALL
American International
AIG
$41.5B
| $1.13M | 0.05% |
1,806
-536
| -23% | -$34.4K |
|
342
PUT
SLB Ltd
SLB
$71.3B
| $1.13M | 0.05% |
4,217
+666
| +19% | +$54.5K |
|
343
PUT
American Airlines Group
AAL
$9.75B
| $1.11M | 0.05% |
4,483
+1,228
| +38% | +$55.6K |
|
344
iShare MSCI Eurozone ETF
EZU
$9.53B
| $1.11M | 0.05% |
+29,536
| New | +$1.06M |
|
345
Altisource Portfolio Solutions
ASPS
$74M
| $1.11M | 0.05% |
3,759
+1,358
| +57% | +$301K |
|
346
CALL
Nike
NKE
$62.6B
| $1.1M | 0.05% |
4,966
+2,401
| +94% | +$133K |
|
347
PUT
Petrobras
PBR
$122B
| $1.1M | 0.05% |
7,767
+5,129
| +194% | +$52.7K |
|
348
Ametek
AME
$54.3B
| $1.1M | 0.05% |
+20,280
| New | +$1.07M |
|
349
Vanguard Small-Cap ETF
VB
$79.7B
| $1.09M | 0.05% |
+8,195
| New | +$1.08M |
|
350
Prudential Financial
PRU
$41.3B
| $1.09M | 0.05% |
10,233
+239
| +2% | +$25.8K |
|
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.