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 | |
|---|---|---|---|---|---|---|
|
XLNX
601
DELISTED
Xilinx Inc
XLNX
| $589K | 0.03% |
10,182
+9,497
| +1,386% | +$558K |
|
602
iShares MSCI Germany ETF
EWG
$1.51B
| $585K | 0.03% |
+20,364
| New | +$564K |
|
603
CALL
JD.com
JD
$40.7B
| $583K | 0.03% |
2,873
-839
| -23% | -$24.7K |
|
604
PUT
Ulta Beauty
ULTA
$20.8B
| $583K | 0.03% |
923
+594
| +181% | +$163K |
|
605
Affiliated Managers Group
AMG
$9.16B
| $581K | 0.03% |
3,547
-1,731
| -33% | -$274K |
|
606
Herbalife
HLF
$1.26B
| $581K | 0.03% |
+20,016
| New | +$557K |
|
607
Infosys
INFY
$44.3B
| $580K | 0.03% |
+73,522
| New | +$548K |
|
608
CALL
Cisco
CSCO
$442B
| $578K | 0.03% |
1,978
-531
| -21% | -$17.2K |
|
609
Essent Group
ESNT
$6B
| $578K | 0.03% |
+16,001
| New | +$555K |
|
610
PUT
Charter Communications
CHTR
$15.9B
| $577K | 0.03% |
785
+330
| +73% | +$105K |
|
611
State Street Industrial Select Sector SPDR ETF
XLI
$33.2B
| $575K | 0.02% |
8,843
-2,936
| -25% | -$190K |
|
612
CALL
MetLife
MET
$60B
| $573K | 0.02% |
4,654
+459
| +11% | +$21.9K |
|
613
CALL
NXP Semiconductors
NXPI
$70.4B
| $571K | 0.02% |
1,478
-1,572
| -52% | -$159K |
|
|
ATH
614
DELISTED
Athene Holding Ltd. Class A Common Shares
ATH
| $571K | 0.02% |
+11,426
| New | +$567K |
|
615
Edwards Lifesciences
EW
$48.6B
| $570K | 0.02% |
18,198
+13,686
| +303% | +$428K |
|
|
PRMW
616
DELISTED
Primo Water Corporation
PRMW
| $570K | 0.02% |
46,163
+23,603
| +105% | +$266K |
|
617
CALL
RH
RH
$3.31B
| $563K | 0.02% |
963
+295
| +44% | +$9.12K |
|
618
PUT
Signet Jewelers
SIG
$3.52B
| $563K | 0.02% |
587
+376
| +178% | +$28.1K |
|
|
VRNT
619
DELISTED
Verint Systems
VRNT
| $563K | 0.02% |
25,490
+20,253
| +387% | +$395K |
|
620
ICICI Bank
IBN
$106B
| $561K | 0.02% |
71,865
+32,850
| +84% | +$245K |
|
621
CALL
Colgate-Palmolive
CL
$73.3B
| $560K | 0.02% |
2,423
+2,127
| +719% | +$149K |
|
|
NATI
622
DELISTED
National Instruments Corp
NATI
| $560K | 0.02% |
+17,227
| New | +$548K |
|
|
MASI
623
DELISTED
Masimo
MASI
| $556K | 0.02% |
5,966
-1,879
| -24% | -$155K |
|
|
DBD
624
DELISTED
Diebold Nixdorf Incorporated
DBD
| $555K | 0.02% |
18,106
-5,436
| -23% | -$154K |
|
625
CALL
iShares MSCI Global Gold Miners ETF
RING
$2.36B
| $554K | 0.02% |
1,859
+964
| +108% | +$18.6K |
|
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.