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 | |
|---|---|---|---|---|---|---|
626
PUT
Johnson & Johnson
JNJ
$615B
| $553K | 0.02% |
5,913
+2,412
| +69% | +$288K |
|
627
PUT
FedEx
FDX
$75.9B
| $552K | 0.02% |
2,880
-91
| -3% | -$17.4K |
|
628
PUT
Nutanix
NTNX
$14.4B
| $550K | 0.02% |
942
+841
| +833% | +$22.6K |
|
629
CALL
AbbVie
ABBV
$448B
| $548K | 0.02% |
4,599
+81
| +2% | +$5.09K |
|
630
PUT
General Dynamics
GD
$101B
| $548K | 0.02% |
1,296
+543
| +72% | +$100K |
|
|
SGEN
631
DELISTED
Seagen Inc. Common Stock
SGEN
| $547K | 0.02% |
+8,703
| New | +$543K |
|
|
HTZ
632
DELISTED
Hertz Global Holdings, Inc.
HTZ
| $547K | 0.02% |
35,914
+24,696
| +220% | +$448K |
|
|
VALE.P
633
PUT
DELISTED
Vale S A
VALE.P
| $547K | 0.02% |
5,261
+2,792
| +113% | +$26.2K |
|
634
National Beverage
FIZZ
$2.91B
| $544K | 0.02% |
+12,874
| New | +$387K |
|
635
PUT
Starbucks
SBUX
$119B
| $543K | 0.02% |
6,374
+3,567
| +127% | +$202K |
|
|
WFT
636
DELISTED
Weatherford International plc
WFT
| $539K | 0.02% |
81,185
+22,720
| +39% | +$133K |
|
637
IPG Photonics
IPGP
$4.15B
| $535K | 0.02% |
+4,434
| New | +$502K |
|
638
Melco Resorts & Entertainment
MLCO
$2.12B
| $535K | 0.02% |
+28,870
| New | +$495K |
|
639
Ultragenyx Pharmaceutical
RARE
$2.72B
| $535K | 0.02% |
7,898
+700
| +10% | +$53.3K |
|
|
PTLA
640
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $535K | 0.02% |
13,655
+6,390
| +88% | +$204K |
|
641
IQVIA
IQV
$33.1B
| $534K | 0.02% |
6,634
+4,663
| +237% | +$364K |
|
642
PUT
SM Energy
SM
$7.96B
| $534K | 0.02% |
607
+342
| +129% | +$9.47K |
|
643
PUT
AT&T
T
$160B
| $533K | 0.02% |
11,148
+214
| +2% | +$6.74K |
|
644
PUT
Union Pacific
UNP
$174B
| $533K | 0.02% |
4,239
+2,056
| +94% | +$219K |
|
|
SIOX
645
DELISTED
Sio Gene Therapies Inc. Common Stock
SIOX
| $531K | 0.02% |
4,443
+2,274
| +105% | +$238K |
|
646
ON Semiconductor
ON
$35.9B
| $530K | 0.02% |
34,217
-9,781
| -22% | -$142K |
|
647
Zebra Technologies
ZBRA
$12.5B
| $529K | 0.02% |
+5,806
| New | +$503K |
|
648
Shutterstock
SSTK
$271M
| $528K | 0.02% |
+12,789
| New | +$610K |
|
|
IPXL
649
DELISTED
Impax Laboratories, Inc.
IPXL
| $528K | 0.02% |
41,750
+35,529
| +571% | +$429K |
|
650
CALL
Lockheed Martin
LMT
$119B
| $527K | 0.02% |
606
+33
| +6% | +$8.64K |
|
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.