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 | |
|---|---|---|---|---|---|---|
2551
PUT
HF Sinclair
DINO
$15.9B
| $41K | ﹤0.01% |
160
-90
| -36% | -$2.63K |
|
2552
CALL
8x8 Inc
EGHT
$247M
| $41K | ﹤0.01% |
+632
| New | +$9.58K |
|
2553
CALL
Edwards Lifesciences
EW
$47.6B
| $41K | ﹤0.01% |
699
-105
| -13% | -$3.29K |
|
2554
PUT
Exelixis
EXEL
$13.9B
| $41K | ﹤0.01% |
784
+217
| +38% | +$4.41K |
|
2555
CALL
HDFC Bank
HDB
$119B
| $41K | ﹤0.01% |
+712
| New | +$12.4K |
|
2556
Direxion Daily MSCI India Bull 2X ETF
INDL
$55.2M
| $41K | ﹤0.01% |
582
+382
| +191% | +$22.3K |
|
2557
Iron Mountain
IRM
$38.2B
| $41K | ﹤0.01% |
1,162
-2,232
| -66% | -$79K |
|
2558
PUT
Madison Square Garden
MSGS
$9.54B
| $41K | ﹤0.01% |
353
+230
| +187% | +$29.9K |
|
2559
CALL
Meritage Homes
MTH
$4.87B
| $41K | ﹤0.01% |
728
+566
| +349% | +$10.1K |
|
2560
NXP Semiconductors
NXPI
$68B
| $41K | ﹤0.01% |
400
-66,892
| -99% | -$6.76M |
|
2561
CALL
OneMain Financial
OMF
$6.9B
| $41K | ﹤0.01% |
+479
| New | +$12K |
|
|
PARA
2562
PUT
DELISTED
Paramount Global Class B
PARA
| $41K | ﹤0.01% |
920
+570
| +163% | +$37.4K |
|
|
PBT
2563
Permian Basin Royalty Trust
PBT
$1.36B
| $41K | ﹤0.01% |
4,418
+4,389
| +15,134% | +$39.1K |
|
2564
Rithm Capital
RITM
$5.09B
| $41K | ﹤0.01% |
2,436
-2,664
| -52% | -$43.6K |
|
|
NYMX
2565
CALL
DELISTED
Nymox Pharmaceutical Corp
NYMX
| $41K | ﹤0.01% |
470
+240
| +104% | +$790 |
|
|
INVN
2566
CALL
DELISTED
Invensense Inc
INVN
| $41K | ﹤0.01% |
786
-36
| -4% | -$449 |
|
|
SGYPW
2567
CALL
DELISTED
Synergy Pharmaceuticals, Inc. - Warrants
SGYPW
| $41K | ﹤0.01% |
765
-532
| -41% | -$28.5K |
|
|
OREX
2568
PUT
DELISTED
Orexigen Therapeutics, Inc.
OREX
| $41K | ﹤0.01% |
472
+417
| +758% | +$1.65K |
|
|
ASRT
2569
DELISTED
Assertio
ASRT
| $40K | ﹤0.01% |
54
-161
| -75% | -$163K |
|
2570
PUT
Becton Dickinson
BDX
$43.1B
| $40K | ﹤0.01% |
193
+2
| +1% | +$349 |
|
2571
CorMedix
CRMD
$617M
| $40K | ﹤0.01% |
5,026
+1,506
| +43% | +$14.4K |
|
2572
CALL
Identive
INVE
$64.6M
| $40K | ﹤0.01% |
304
+286
| +1,589% | +$1.41K |
|
2573
CALL
LGI Homes
LGIH
$1.4B
| $40K | ﹤0.01% |
208
+131
| +170% | +$3.99K |
|
2574
CALL
ArcelorMittal
MT
$50.4B
| $40K | ﹤0.01% |
90
-118
| -57% | -$2.99K |
|
|
2575
PUT
ArcelorMittal
MT
$50.4B
| $40K | ﹤0.01% |
117
+85
| +266% | +$2.15K |
|
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.