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 | |
|---|---|---|---|---|---|---|
1601
Kopin
KOPN
$663M
| $119K | 0.01% |
29,139
+27,695
| +1,918% | +$98K |
|
1602
CALL
Pultegroup
PHM
$24.5B
| $119K | 0.01% |
1,200
+706
| +143% | +$15.2K |
|
|
SCHW
1603
PUT
Charles Schwab
SCHW
$177B
| $119K | 0.01% |
1,294
+163
| +14% | +$6.73K |
|
1604
CALL
Teck Resources
TECK
$29.5B
| $119K | 0.01% |
1,629
-214
| -12% | -$4.78K |
|
1605
PUT
Vodafone
VOD
$34.9B
| $119K | 0.01% |
1,326
+255
| +24% | +$6.53K |
|
|
JNPR
1606
CALL
DELISTED
Juniper Networks
JNPR
| $118K | 0.01% |
919
-349
| -28% | -$9.74K |
|
1607
CALL
Monster Beverage
MNST
$91.4B
| $118K | 0.01% |
900
-36
| -4% | -$804 |
|
1608
Natural Resource Partners
NRP
$1.3B
| $118K | 0.01% |
3,283
-31,338
| -91% | -$1.18M |
|
1609
Pearson
PSO
$9.78B
| $118K | 0.01% |
13,928
+13,770
| +8,715% | +$115K |
|
1610
PUT
Synaptics
SYNA
$4.41B
| $118K | 0.01% |
378
-420
| -53% | -$22.6K |
|
1611
Winnebago Industries
WGO
$870M
| $118K | 0.01% |
+4,042
| New | +$129K |
|
|
ONIT
1612
CALL
Onity Group
ONIT
$333M
| $118K | 0.01% |
146
+103
| +240% | +$7.86K |
|
|
BRG
1613
DELISTED
Bluerock Residential Growth REIT, Inc.
BRG
| $118K | 0.01% |
9,586
+9,447
| +6,796% | +$120K |
|
|
DF
1614
DELISTED
Dean Foods Company
DF
| $118K | 0.01% |
+6,033
| New | +$118K |
|
|
HZNP
1615
PUT
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $118K | 0.01% |
776
-322
| -29% | -$5.21K |
|
|
HDP
1616
CALL
DELISTED
Hortonworks, Inc.
HDP
| $118K | 0.01% |
1,590
+940
| +145% | +$9.09K |
|
|
FIG
1617
DELISTED
Fortress Investment Group Llc
FIG
| $118K | 0.01% |
14,933
-39,792
| -73% | -$269K |
|
|
BRSL
1618
Brightstar Lottery PLC
BRSL
$1.91B
| $117K | 0.01% |
+4,971
| New | +$129K |
|
1619
PUT
Kinder Morgan
KMI
$73.1B
| $117K | 0.01% |
1,698
-1,878
| -53% | -$41K |
|
1620
Smith & Wesson
SWBI
$655M
| $117K | 0.01% |
7,733
-6,598
| -46% | -$101K |
|
1621
CALL
Blackstone
BX
$104B
| $116K | 0.01% |
970
-1,003
| -51% | -$30.2K |
|
1622
CALL
CoreCivic
CXW
$3.1B
| $116K | 0.01% |
552
+350
| +173% | +$10.7K |
|
1623
Griffon
GFF
$4.16B
| $116K | 0.01% |
4,707
-4,048
| -46% | -$101K |
|
1624
PUT
HCA Healthcare
HCA
$84.8B
| $116K | 0.01% |
941
+708
| +304% | +$59K |
|
1625
PUT
LyondellBasell Industries
LYB
$19.5B
| $116K | 0.01% |
486
-55
| -10% | -$5.02K |
|
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.