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 | |
|---|---|---|---|---|---|---|
401
Direxion Daily S&P Oil & Gas Exp. & Prod. Bear 2X ETF
DRIP
$100M
| $10.4M | 0.02% |
448
+395
| +745% | +$5.88M |
|
|
ALXN
402
CALL
DELISTED
Alexion Pharmaceuticals
ALXN
| $10.4M | 0.02% |
1,157
+712
| +160% | +$69.9K |
|
|
ATVI
403
CALL
DELISTED
Activision Blizzard
ATVI
| $10.3M | 0.02% |
1,733
-2,080
| -55% | -$123K |
|
404
IBM
IBM
$193B
| $10.3M | 0.02% |
97,139
+23,447
| +32% | +$2.97M |
|
405
CALL
CME Group
CME
$90.1B
| $10.3M | 0.02% |
595
+161
| +37% | +$32K |
|
406
CALL
ASML
ASML
$692B
| $10.3M | 0.02% |
393
+261
| +198% | +$74.3K |
|
|
KFYP
407
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $10.3M | 0.02% |
2,271
+1,753
| +338% | +$46.6K |
|
408
PUT
Analog Devices
ADI
$188B
| $10.3M | 0.02% |
1,144
-181
| -14% | -$19.8K |
|
|
SCHW
409
CALL
Charles Schwab
SCHW
$175B
| $10.2M | 0.02% |
3,028
-700
| -19% | -$29.4K |
|
410
PUT
DuPont de Nemours
DD
$18.9B
| $10.2M | 0.02% |
2,431
+231
| +11% | +$14.1K |
|
411
PUT
Illumina
ILMN
$28.9B
| $10.2M | 0.02% |
382
-839
| -69% | -$235K |
|
412
CALL
Carnival Corporation Ltd
CCL
$35.7B
| $10.2M | 0.02% |
7,707
+6,448
| +512% | +$229K |
|
413
PUT
Arista Networks
ANET
$220B
| $10.1M | 0.02% |
8,000
-224
| -3% | -$2.91K |
|
414
CALL
Twilio
TWLO
$27.8B
| $10.1M | 0.02% |
1,131
-1,549
| -58% | -$170K |
|
415
CALL
Pinduoduo
PDD
$119B
| $10.1M | 0.02% |
2,795
-1,890
| -40% | -$69K |
|
416
CALL
General Dynamics
GD
$101B
| $10.1M | 0.02% |
761
-526
| -41% | -$87.4K |
|
417
PUT
Invesco CurrencyShares British Pound Sterling Trust
FXB
$77.2M
| $10.1M | 0.02% |
835
+381
| +84% | +$47.2K |
|
418
PUT
New Oriental
EDU
$7.75B
| $10M | 0.02% |
927
+444
| +92% | +$57K |
|
419
PUT
RingCentral
RNG
$3.16B
| $10M | 0.02% |
472
-558
| -54% | -$115K |
|
420
PUT
General Mills
GIS
$19.7B
| $9.97M | 0.02% |
1,889
+369
| +24% | +$19.5K |
|
421
PUT
Automatic Data Processing
ADP
$97.2B
| $9.92M | 0.02% |
726
+231
| +47% | +$37.2K |
|
422
Baidu
BIDU
$36.6B
| $9.91M | 0.02% |
98,308
+54,142
| +123% | +$6.6M |
|
423
CALL
Marathon Petroleum
MPC
$92.2B
| $9.88M | 0.02% |
4,182
-1,675
| -29% | -$77.2K |
|
424
PUT
Chewy
CHWY
$8.81B
| $9.87M | 0.02% |
2,634
-107
| -4% | -$3.14K |
|
425
CALL
CoStar Group
CSGP
$11.3B
| $9.87M | 0.02% |
1,680
+290
| +21% | +$18.9K |
|
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.