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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
526
CALL
Futu Holdings
FUTU
$14.9B
| $26.5M | 0.02% |
276,800
+169,300
| +157% | +$10.8M |
|
527
PUT
Zoom
ZM
$25.2B
| $26.5M | 0.02% |
379,400
-252,300
| -40% | -$15.8M |
|
528
PUT
Constellation Brands
STZ
$22.6B
| $26.4M | 0.02% |
102,500
-15,200
| -13% | -$3.77M |
|
529
PUT
Agnico Eagle Mines
AEM
$73.5B
| $26.4M | 0.02% |
327,500
+12,500
| +4% | +$968K |
|
530
PUT
Proshares UltraShort Technology
REW
$3.3M
| $26.4M | 0.02% |
516,975
+82,925
| +19% | +$3.99M |
|
531
CALL
SentinelOne
S
$6.25B
| $26.3M | 0.02% |
1,099,300
+464,200
| +73% | +$10.5M |
|
532
PUT
Wayfair
W
$11.1B
| $26.3M | 0.02% |
467,500
-41,700
| -8% | -$2.01M |
|
533
CALL
Elevance Health
ELV
$84.4B
| $26.3M | 0.02% |
50,500
+6,300
| +14% | +$3.37M |
|
534
CALL
NetApp
NTAP
$32.6B
| $26.2M | 0.02% |
212,300
-237,600
| -53% | -$29.6M |
|
535
PUT
CF Industries
CF
$19.6B
| $26.1M | 0.02% |
304,700
+59,700
| +24% | +$4.62M |
|
536
PUT
Akamai
AKAM
$18.1B
| $26M | 0.02% |
257,600
-32,500
| -11% | -$3.17M |
|
|
B
537
Barrick Mining
B
$62.8B
| $26M | 0.02% |
1,306,715
-1,321,734
| -50% | -$25.2M |
|
538
CALL
GoDaddy
GDDY
$11.8B
| $25.9M | 0.02% |
165,500
+101,300
| +158% | +$15.5M |
|
539
PUT
Nucor
NUE
$53.7B
| $25.9M | 0.02% |
172,400
-3,200
| -2% | -$481K |
|
540
PUT
American Electric Power
AEP
$72.4B
| $25.8M | 0.02% |
251,100
-86,900
| -26% | -$8.48M |
|
541
CALL
Peabody Energy
BTU
$2.91B
| $25.7M | 0.02% |
967,900
+165,700
| +21% | +$3.77M |
|
542
CALL
GE HealthCare
GEHC
$27.9B
| $25.7M | 0.02% |
273,400
-24,600
| -8% | -$2.06M |
|
543
CALL
Cloudflare
NET
$95.5B
| $25.5M | 0.02% |
315,600
-218,500
| -41% | -$17.6M |
|
544
CALL
SiriusXM
SIRI
$10B
| $25.5M | 0.02% |
1,077,700
+930,810
| +634% | +$28.9M |
|
545
PUT
Autodesk
ADSK
$43B
| $25.5M | 0.01% |
92,400
-226,800
| -71% | -$57.1M |
|
546
PUT
AST SpaceMobile
ASTS
$18.5B
| $25.2M | 0.01% |
964,200
+570,100
| +145% | +$12.9M |
|
547
PUT
Alcoa
AA
$12.2B
| $25.2M | 0.01% |
653,000
-44,100
| -6% | -$1.5M |
|
548
iShares Russell 2000 ETF
IWM
$81.6B
| $25.1M | 0.01% |
+113,827
| New | +$24.4M |
|
549
PUT
HubSpot
HUBS
$10.5B
| $25.1M | 0.01% |
47,200
+24,100
| +104% | +$12.1M |
|
550
CALL
Southwest Airlines
LUV
$23.3B
| $25.1M | 0.01% |
845,500
-274,800
| -25% | -$7.61M |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.