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 | |
|---|---|---|---|---|---|---|
551
CALL
CSX Corp
CSX
$92.8B
| $639K | 0.03% |
11,934
+9,390
| +369% | +$143K |
|
552
CALL
Gen Digital
GEN
$15.4B
| $635K | 0.03% |
1,511
+462
| +44% | +$13.1K |
|
553
Nu Skin
NUS
$253M
| $635K | 0.03% |
+11,436
| New | +$589K |
|
554
Duluth Holdings
DLTH
$168M
| $633K | 0.03% |
29,771
+28,144
| +1,730% | +$626K |
|
|
HOUS
555
DELISTED
Anywhere Real Estate
HOUS
| $633K | 0.03% |
+21,278
| New | +$578K |
|
556
KeyCorp
KEY
$24.9B
| $633K | 0.03% |
+35,637
| New | +$652K |
|
557
Park Hotels & Resorts
PK
$3.03B
| $633K | 0.03% |
+24,671
| New | +$655K |
|
|
VAR
558
DELISTED
Varian Medical Systems, Inc.
VAR
| $631K | 0.03% |
+6,925
| New | +$578K |
|
559
PUT
American International
AIG
$41.5B
| $630K | 0.03% |
1,814
-1,433
| -44% | -$92K |
|
560
D.R. Horton
DHI
$40.4B
| $630K | 0.03% |
+18,922
| New | +$587K |
|
561
Enova International
ENVA
$5.54B
| $630K | 0.03% |
42,443
+31,766
| +298% | +$449K |
|
562
RH
RH
$3.31B
| $630K | 0.03% |
+13,624
| New | +$421K |
|
563
Carriage Services
CSV
$587M
| $628K | 0.03% |
23,178
+23,008
| +13,534% | +$616K |
|
564
ResMed
RMD
$28B
| $627K | 0.03% |
+8,720
| New | +$603K |
|
565
H&R Block
HRB
$5.01B
| $626K | 0.03% |
26,951
+17,358
| +181% | +$388K |
|
566
Centene
CNC
$32.5B
| $625K | 0.03% |
17,550
-4,446
| -20% | -$149K |
|
567
Cirrus Logic
CRUS
$7.04B
| $625K | 0.03% |
+10,305
| New | +$587K |
|
568
CALL
American Express
AXP
$238B
| $623K | 0.03% |
1,528
+354
| +30% | +$27.7K |
|
569
Cytokinetics
CYTK
$11.2B
| $619K | 0.03% |
48,194
+34,828
| +261% | +$407K |
|
570
PUT
Broadcom
AVGO
$1.89T
| $618K | 0.03% |
15,970
+2,250
| +16% | +$46.3K |
|
571
iShares MSCI Turkey ETF
TUR
$209M
| $618K | 0.03% |
17,263
-280
| -2% | -$9.63K |
|
|
OKS
572
CALL
DELISTED
Oneok Partners LP
OKS
| $618K | 0.03% |
917
+682
| +290% | +$34.1K |
|
573
CALL
United Parcel Service
UPS
$98.5B
| $617K | 0.03% |
2,547
+678
| +36% | +$74.1K |
|
|
ICPT
574
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $616K | 0.03% |
5,447
-6,172
| -53% | -$721K |
|
575
ScottsMiracle-Gro
SMG
$4B
| $615K | 0.03% |
+6,595
| New | +$611K |
|
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.