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 |
SPDR Gold Trust
GLD
|
+$31.6M |
| 2 |
iShares Silver Trust
SLV
|
+$28.1M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.1M |
| 4 |
JPMorgan Chase
JPM
|
+$24.5M |
| 5 |
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
|
+$24M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$51.6M |
| 2 |
Amazon
AMZN
|
+$47.4M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$44.7M |
| 4 |
Netflix
NFLX
|
+$38.3M |
| 5 |
NVIDIA
NVDA
|
+$31.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Healthcare | 0.33% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.16% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
551
PUT
Burlington
BURL
$22.3B
| $6.81M | 0.01% |
430
-400
| -48% | -$84.2K |
|
552
CALL
Markel Group
MKL
$24.3B
| $6.77M | 0.01% |
73
+72
| +7,200% | +$82.3K |
|
553
CALL
Zoetis
ZTS
$31.1B
| $6.77M | 0.01% |
575
-106
| -16% | -$14K |
|
554
PUT
Boston Scientific
BSX
$63.9B
| $6.76M | 0.01% |
2,072
+555
| +37% | +$21.7K |
|
|
LKFT
555
CALL
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.88B
| $6.76M | 0.01% |
345
+223
| +183% | +$48K |
|
|
K
556
CALL
DELISTED
Kellanova
K
| $6.75M | 0.01% |
1,198
+294
| +33% | +$18K |
|
|
SCHW
557
PUT
Charles Schwab
SCHW
$175B
| $6.73M | 0.01% |
2,001
+557
| +39% | +$23.4K |
|
558
CALL
United Rentals
URI
$64.8B
| $6.7M | 0.01% |
651
-56
| -8% | -$7.42K |
|
559
CALL
L3Harris
LHX
$53.1B
| $6.68M | 0.01% |
+371
| New | +$76K |
|
560
CALL
Southwest Airlines
LUV
$23.3B
| $6.67M | 0.01% |
1,873
-217
| -10% | -$10.8K |
|
561
CALL
Freeport-McMoran
FCX
$93.4B
| $6.6M | 0.01% |
9,778
+2,416
| +33% | +$25.3K |
|
562
CALL
Hilton Worldwide
HLT
$73.8B
| $6.59M | 0.01% |
966
+469
| +94% | +$45.7K |
|
563
CALL
Peloton Interactive
PTON
$2.71B
| $6.56M | 0.01% |
2,472
-4,286
| -63% | -$119K |
|
564
CALL
ResMed
RMD
$28B
| $6.54M | 0.01% |
444
+42
| +10% | +$6.69K |
|
565
CALL
Philips
PHG
$25.5B
| $6.54M | 0.01% |
2,048
+1,918
| +1,475% | +$67.8K |
|
566
PUT
Trip.com Group
TCOM
$26.8B
| $6.53M | 0.01% |
2,786
+1,722
| +162% | +$53.7K |
|
567
PUT
Linde
LIN
$235B
| $6.52M | 0.01% |
377
+357
| +1,785% | +$70.5K |
|
568
PUT
PG&E
PCG
$39.9B
| $6.52M | 0.01% |
7,255
-5,779
| -44% | -$76.8K |
|
569
CALL
Ciena
CIEN
$56.2B
| $6.52M | 0.01% |
1,638
+613
| +60% | +$25.1K |
|
570
JD.com
JD
$40.7B
| $6.52M | 0.01% |
+160,987
| New | +$6.43M |
|
571
CALL
Intercontinental Exchange
ICE
$80.6B
| $6.52M | 0.01% |
807
+670
| +489% | +$60.7K |
|
572
PUT
Paycom
PAYC
$6.5B
| $6.5M | 0.01% |
322
-709
| -69% | -$194K |
|
|
ANSS
573
PUT
DELISTED
Ansys
ANSS
| $6.46M | 0.01% |
278
-12
| -4% | -$3.09K |
|
574
CALL
Prudential Financial
PRU
$41.3B
| $6.43M | 0.01% |
1,233
-2
| -0.2% | -$159 |
|
575
CALL
Vale
VALE
$63.2B
| $6.42M | 0.01% |
7,746
+6,184
| +396% | +$67.3K |
|
Similar funds
Simplex Trading's Q1 2020 Portfolio in Review
As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
- Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
- Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
- Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
- Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.
Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.