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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.25% |
| 2 | Technology | 0.44% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Healthcare | 0.22% |
| 5 | Financials | 0.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
501
Newmont
NEM
$135B
| $24.4M | 0.02% |
660,300
+107,394
| +19% | +$4.37M |
|
502
PUT
Vanguard Consumer Discretionary ETF
VCR
$5.97B
| $24.4M | 0.02% |
64,200
+22,000
| +52% | +$6.24M |
|
503
CALL
iShares Core MSCI Emerging Markets ETF
IEMG
$165B
| $24.4M | 0.02% |
423,900
-104,900
| -20% | -$5.19M |
|
504
CALL
Dow Inc
DOW
$21.3B
| $24.3M | 0.02% |
470,700
-94,500
| -17% | -$5.07M |
|
|
PARA
505
PUT
DELISTED
Paramount Global Class B
PARA
| $24.1M | 0.02% |
1,870,500
+603,900
| +48% | +$8.94M |
|
506
CALL
HCA Healthcare
HCA
$87.7B
| $24.1M | 0.02% |
97,900
+22,200
| +29% | +$6.07M |
|
507
CALL
Pultegroup
PHM
$23.7B
| $24.1M | 0.02% |
325,100
-183,100
| -36% | -$14.6M |
|
508
PUT
Alcoa
AA
$13.2B
| $24.1M | 0.02% |
828,300
+1,600
| +0.2% | +$50.2K |
|
509
PUT
Etsy
ETSY
$7.02B
| $24.1M | 0.02% |
372,600
+3,000
| +0.8% | +$237K |
|
510
CALL
Gilead Sciences
GILD
$187B
| $24M | 0.02% |
320,700
-116,100
| -27% | -$8.93M |
|
511
PUT
Capital One
COF
$135B
| $24M | 0.02% |
247,400
-237,300
| -49% | -$25.4M |
|
|
512
PUT
Pultegroup
PHM
$23.7B
| $23.9M | 0.02% |
323,200
+81,500
| +34% | +$6.5M |
|
513
CALL
Dominion Energy
D
$57.9B
| $23.9M | 0.02% |
534,900
-22,800
| -4% | -$1.13M |
|
514
PUT
Best Buy
BBY
$19B
| $23.9M | 0.02% |
343,900
+83,600
| +32% | +$6.46M |
|
515
PUT
Norwegian Cruise Line
NCLH
$7.15B
| $23.9M | 0.02% |
1,448,300
-562,300
| -28% | -$10.4M |
|
516
PUT
Take-Two Interactive
TTWO
$40.1B
| $23.8M | 0.02% |
169,600
-167,500
| -50% | -$24.1M |
|
|
DOCU
517
CALL
DocuSign
DOCU
$13.1B
| $23.8M | 0.02% |
566,500
-112,400
| -17% | -$5.51M |
|
518
PUT
Western Digital
WDC
$169B
| $23.8M | 0.02% |
689,680
-186,411
| -21% | -$5.88M |
|
519
CALL
NXP Semiconductors
NXPI
$57.5B
| $23.8M | 0.02% |
118,800
+11,500
| +11% | +$2.38M |
|
520
PUT
Analog Devices
ADI
$176B
| $23.7M | 0.02% |
135,600
+6,200
| +5% | +$1.14M |
|
521
CALL
Zillow
Z
$7.78B
| $23.7M | 0.02% |
514,100
+150,400
| +41% | +$7.73M |
|
522
PUT
Builders FirstSource
BLDR
$7.08B
| $23.7M | 0.02% |
190,000
+13,100
| +7% | +$1.81M |
|
523
PUT
Kenvue
KVUE
$36B
| $23.6M | 0.02% |
1,176,900
+798,300
| +211% | +$18.5M |
|
|
ATVI
524
DELISTED
Activision Blizzard
ATVI
| $23.6M | 0.02% |
251,735
+107,053
| +74% | +$9.77M |
|
525
PUT
e.l.f. Beauty
ELF
$6.47B
| $23.5M | 0.02% |
213,700
+101,800
| +91% | +$12.4M |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading's Q3 2023 filing shows 1,401 new, 3,688 increased, 3,363 reduced and 1,719 closed positions. Its largest new stake was Amazon: 841,102 shares worth $107M. The largest sale was Netflix, an estimated $27.1M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,401 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.